 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| d a t a sh eet preliminary speci?cation file under integrated circuits, ic03 2000 mar 21 integrated circuits tea1098a speech and handsfree ic
2000 mar 21 2 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a features line interface low dc line voltage voltage regulator with adjustable dc voltage symmetrical high impedance inputs (70 k w ) for dynamic, magnetic or electret microphones dtmf input with confidence tone on earphone and/or loudspeaker earphone amplifier for dynamic, magnetic or piezo-electric earpieces (with externally adjustable gain) digital volume control on earphone amplifier (4 steps) automatic gain control (agc) for true line loss compensation microphone mute key tone mode. supplies provides a strong 3.35 v regulated supply for microcontroller or dialler provides filtered power supply, optimized according to line current filtered 2.0 v power supply output for electret microphone pd logic input for power-down. handsfree asymmetrical high input impedance for electret microphone loudspeaker amplifier with single-ended rail-to-rail output and externally adjustable gain dynamic limiter on loudspeaker amplifier to prevent distortion digital volume control on loudspeaker amplifier (8 steps) duplex controller consisting of: C signal and noise envelope monitors for both channels (with adjustable sensitivities and timing) C decision logic (with adjustable switch-over and idle mode timing) C voice switch control (with adjustable switching range and constant sum of gain during switching). applications line powered telephone sets. general description the tea1098a is an analog bipolar circuit dedicated for telephony applications. it includes a line interface, handset (hs) microphone and earpiece amplifiers, handsfree (hf) microphone and loudspeaker amplifiers and a duplex controller with signal and noise monitors on both channels. digital volume control is available both on earphone and loudspeaker amplifiers. this ic provides a 3.35 v strong supply for a microcontroller and a 2.0 v filtered voltage supply for an electret microphone. ordering information type number package name description version TEA1098ATV vso40 plastic very small outline package; 40 leads sot158-1 tea1098ah qfp44 plastic quad ?at package; 44 leads (lead length 1.3 mm); body 10 10 1.75 mm sot307-2 2000 mar 21 3 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a quick reference data i line = 15 ma; r slpe =20 w ;z line = 600 w ; f = 1 khz; t amb =25 c; agc pin connected to ln; pd = high; hfc = low; mute = high; bpc = high; measured according to test circuits; unless otherwise speci?ed. symbol parameter conditions min. typ. max. unit i line line current operating range normal operation 11 - 130 ma with reduced performance 1 - 11 ma v slpe stabilized voltage between slpe and gnd i line = 15 ma 3.4 3.7 4.0 v i line = 70 ma 5.7 6.1 6.5 v v bb regulated supply voltage for internal circuitry i line = 15 ma 2.75 3.0 3.25 v i line = 70 ma 4.9 5.3 5.7 v v dd regulated supply voltage on pin v dd v bb > 3.35 v + 0.25 v (typ.) 3.1 3.35 3.6 v otherwise - v bb - 0.25 - v i bb current available on pin v bb in speech mode - 11 - ma in handsfree mode - 9 - ma i bb(pd) current consumption on v bb during power-down phase pd = low - 460 -m a g v(mic-ln) voltage gain from pin mic+/mic - to ln v mic = 5 mv (rms) 43.3 44.3 45.3 db g v(ir-reco) voltage gain from pin ir (referenced to ln) to reco v ir = 15 mv (rms); hfc = high 28.7 29.7 30.7 db d g v(reco-earo) gain voltage range between pins reco and earo - 3 - +15 db g v(txi-txo) voltage gain from pin txi to txo v txi = 3 mv (rms); r gatx = 30.1 k w 12.7 15.2 17.7 db g v(hftx-ln) voltage gain from pin hftx to ln v hftx = 15 mv (rms) 33.5 34.7 35.9 db g v(hfrx-lsao ) voltage gain from pin hfrx to lsao v hfrx = 30 mv (rms); r gals = 255 k w; i line =70ma 25.5 28 30.5 db swr switching range - 40 - db d swr switching range adjustment with r swr referenced to 365 k w - 40 - +12 db d g v(trx) gain control range for transmit and receive ampli?ers affected by the agc; with respect to i line =15ma i line = 70 ma 5.45 6.45 7.45 db 2000 mar 21 4 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a block diagram handbook, full pagewidth fca140 line current detection low voltage behaviour supply management switch starter agc gnd v bb v dd mics pd agc ln 19 (15) 22 (18) 17 (13) 39 (36) 35 (32) 34 (31) 33 (30) 31 (28) 9 (4) 8 (3) 7 (2) 10 (5) 12 (7) 11 (6) 15 (11) 16 (12) 13 (8) 38 (35) (17) 21 (1) 6 (41) 4 (22) 26 (21) 25 (25) 28 (24) 27 (29) 32 (26) 29 (27) 30 (39) 2 (37) 40 (38) 1 (20) 24 (19) 23 (10) 14 37 (34) 36 (33) reg 20 (16) 18 (14) slpe tail currents for preamps power-down current sources attenuator hftx mic + mic - dtmf logic inputs decoding hfc mute gatx txo swt gndtx txi tea1098a tx and rx envelope and noise detectors tsen tenv tnoi rnoi renv rsen lsao gals buffers and comparators duco logic swt status voice switch volume control idt stab swr evci (42) 5 lvci hfrx attenuator dlc dynamic limiter ir reco earo garx r1 (40) 3 bpc fig.1 block diagram. 2000 mar 21 5 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a pinning symbol pin description TEA1098ATV tea1098ah pd 1 38 power-down input (active low) mute 2 39 logic input (active low) bpc 3 40 logic input (active low) evci 4 41 logic input for digital volume control (earpiece and loudspeaker lsb) lvci 5 42 logic input for digital volume control (loudspeaker msb) n.c. - 43 not connected n.c. - 44 not connected hfrx 6 1 receive input for loudspeaker ampli?er tnoi 7 2 transmit noise envelope timing adjustment tenv 8 3 transmit signal envelope timing adjustment tsen 9 4 transmit signal envelope sensitivity adjustment rnoi 10 5 receive noise envelope timing adjustment rsen 11 6 receive signal envelope sensitivity adjustment renv 12 7 receive signal envelope timing adjustment dlc 13 8 dynamic limiter capacitor for the loudspeaker ampli?er n.c. - 9 not connected v bb 14 10 stabilized supply for internal circuitry gals 15 11 loudspeaker ampli?er gain adjustment lsao 16 12 loudspeaker ampli?er output gnd 17 13 ground reference slpe 18 14 line current sense ln 19 15 positive line terminal reg 20 16 line voltage regulator decoupling ir 21 17 receive ampli?er input agc 22 18 automatic gain control/line loss compensation v dd 23 19 3.35 v regulated voltage supply for microcontrollers mics 24 20 microphone supply stab 25 21 reference current adjustment swr 26 22 switching range adjustment n.c. - 23 not connected swt 27 24 switch-over timing adjustment idt 28 25 idle mode timing adjustment txo 29 26 handsfree microphone ampli?er output gatx 30 27 handsfree microphone ampli?er gain adjustment txi 31 28 handsfree microphone ampli?er input gndtx 32 29 ground reference for microphone ampli?ers mic - 33 30 negative handset microphone ampli?er input mic+ 34 31 positive handset microphone ampli?er input 2000 mar 21 6 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a dtmf 35 32 dual tone multi-frequency input earo 36 33 earpiece ampli?er output garx 37 34 earpiece ampli?er gain adjustment reco 38 35 receive ampli?er output hftx 39 36 transmit input for line ampli?er hfc 40 37 logic input symbol pin description TEA1098ATV tea1098ah handbook, halfpage TEA1098ATV fca141 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 hfc hftx reco garx earo dtmf mic + mic - gndtx txi gatx txo idt swt swr stab mics v dd agc ir pd mute bpc evci lvci hfrx tnoi tenv tsen rnoi rsen renv dlc v bb gals lsao gnd slpe ln reg fig.2 pin configuration (TEA1098ATV). 2000 mar 21 7 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a handbook, full pagewidth 1 2 3 4 5 6 7 8 9 10 11 33 32 31 30 29 28 27 26 25 24 23 12 13 14 15 16 17 18 19 20 21 22 44 43 42 41 40 39 38 37 36 35 34 tea1098ah fca142 earo dtmf mic + mic - txi gatx txo idt swt n.c. hfrx tnoi tenv tsen rnoi rsen dlc n.c. gals gndtx n.c. lvci evci bpc mute pd hftx reco garx n.c. hfc gnd slpe ln reg ir agc mics stab swr lsao v dd renv v bb fig.3 pin configuration (tea1098ah). functional description all data given in this chapter are typical values, except when otherwise specified. supplies l ine interface and internal supply ( pins ln, slpe, reg and v bb ) the supply for the tea1098a and its peripherals is obtained from the line. the ic generates a stabilized reference voltage (v ref ) between pins slpe and gnd. this reference voltage is equal to 3.7 v for line currents lower than 18 ma. it than increases linearly with the line current and reaches the value of 6.1 v for line currents higher than 45 ma. for line currents below 9 ma, the internal reference voltage generating v ref is automatically adjusted to a lower value. this is the so-called low voltage area and the tea1098a has limited performances in this area (see section low voltage behaviour). this reference voltage is temperature compensated. the voltage between pins slpe and reg is used by the internal regulator to generate the stabilized reference voltage and is decoupled by means of a capacitor between pins ln and reg. this capacitor converted into an equivalent inductance realizes the set impedance conversion from its dc value (r slpe ) to its ac value (done by an external impedance). the ic regulates the line voltage at pin ln and can be calculated as follows: where: i line = line current i x = current consumed on pin ln (approximately a few m a) i slpe = current flowing through the r slpe resistor the preferred value for r slpe is 20 w . changing this value will affect more than the dc characteristics; it also influences the transmit gains to the line, the gain control characteristic, the sidetone level and the maximum output swing on the line. v ln v ref r slpe i + slpe = i slpe i line i x C = 2000 mar 21 8 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a fig.4 line interface principle. handbook, full pagewidth mgm298 tn2 tr2 tr1 e2 d1 d1 r3 r2 r1 tn1 tp1 j2 j1 e1 gnd gnd v bb from preamp gnd reg ln slpe c reg 4.7 m f r slpe 20 w as can be seen from fig.4, the internal circuitry is supplied by pin v bb , which is a strong supply point combined with the line interface. the line current is flowing through the r slpe resistor and is sunk by the v bb voltage stabilizer, thus becoming available for a loudspeaker amplifier or any peripheral ic. its voltage is equal to 3.0 v for line currents lower than 18 ma. it than increases linearly with the line current and reaches the value of 5.3 v for line currents greater than 45 ma. it is temperature compensated. the aim of the current switch tr1 and tr2 is to reduce distortion of large ac line signals. current i slpe is supplied to v bb via tr1 when the voltage on slpe is greater than v bb + 0.25 v. when the voltage on slpe is lower than this value, the current i slpe is shunted to gnd via tr2. the reference voltage v ref can be increased by connecting an external resistor between pins reg and slpe. for large line currents, this increase can slightly affect some dynamic performances such as maximum signal level on the line for 2% thd. the voltage on pin v bb is not affected by this external resistor; see fig.5 for the main dc voltages. 2000 mar 21 9 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a v dd supply for microcontroller ( pin v dd ) the voltage on the v dd supply point follows the voltage on v bb with a difference typically equal to 250 mv and is internally limited to 3.35 v. this voltage is temperature compensated. this supply point can provide a current up to 3 ma typically. its internal consumption stays low (a few 10 na) as long as v dd does not exceed 1.5 v. v dd can also be used as an input; in this case the voltage will be stabilised to 3.35 v up to 75 ma input current. v bb and v dd can supply external circuits in the limit of currents provided from the line, taking into account the internal current consumption. fig.5 main dc voltages. handbook, full pagewidth 0.07 0.06 8 6 2 0 0.00 0.01 voltages (v) 0.02 0.05 mics vdd vbb slpe ln line current (a) 0.04 0.03 4 mgl439 2000 mar 21 10 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a fig.6 current consumption on v dd . handbook, full pagewidth 1.0 i dd (a) 1.5 2.5 3.0 v dd (v) 2.0 100.0u 10.0u 100.0n 10.0n 1.0u 10.0p 1.0n 100.0p mgl438 s upply for microphone ( pins mics and gndtx) the mics output can be used as a supply for an electret microphone. its voltage is equal to 2.0 v; it can source a current up to 1 ma and has an output impedance equal to 200 w . l ow voltage behaviour for line currents below 9 ma, the reference voltage is automatically adjusted to a lower value; the v bb voltage follows the slpe voltage with 250 mv difference. the excess current available for other purposes than dc biasing of the ic becomes small. in this low voltage area, the ic has limited performances. when the v bb voltage becomes lower than 2.7 v, the v bb detector of the receive dynamic limiter on pin lsao acts continuously, discharging the capacitor connected to pin dlc. in the dc condition, the loudspeaker is then automatically disabled below this voltage. when v bb goes below 2.5 v, the tea1098a is forced into a low voltage mode whatever the levels on the logic inputs are. it is a speech mode with reduced performances only enabling the microphone channel (between the mic inputs and ln) and the earpiece amplifier. these two channels are able to deliver signals for line currents as small as 3 ma. the hfc input is tied to gnd sinking a current typically equal to 300 m a. p ower - down mode ( pin pd) to reduce consumption during dialling or register recall (flash), the tea1098a is provided with a power-down input ( pd). when the voltage on pin pd is low, the current consumption from v bb and v dd is reduced to 460 m a typically. therefore a capacitor of 470 m f on v bb is sufficient to power the tea1098a during pulse dialling or flash. the pd input has a pull-up structure. in this mode, the capacitor c reg is internally disconnected. 2000 mar 21 11 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a transmit channels (pins mic+, mic - , dtmf, hftx and ln) h andset microphone amplifier ( pins mic+, mic - and ln) the tea1098a has symmetrical microphone inputs. the input impedance between pins mic+ and mic - is typically 70 k w . the voltage gain between pins mic+/mic - and ln is set to 44.3 db. without limitation from the output, the microphone input stage can accommodate signals up to 18 mv (rms) at room temperature for 2% of total harmonic distortion (thd). the microphone inputs are biased at one diode voltage. automatic gain control is provided for line loss compensation. dtmf amplifier ( pins dtmf, ln and reco) the tea1098a has an asymmetrical dtmf input. the input impedance between pins dtmf and gnd is typically 20 k w . the voltage gain between pins dtmf and ln is set to 25.35 db. without limitation from the output, the input stage can accommodate signals up to 180 mv (rms) at room temperature for 2% of thd. when the dtmf amplifier is enabled, dialling tones may be sent on the line. these tones can be heard in the earpiece or in the loudspeaker at a low level. this is called the confidence tone. the voltage attenuation between pins dtmf and reco is typically - 16.5 db in handsfree mode (hfc high), and - 28.2 db in handset mode (hfc low). the dc biasing of this input is 0 v. the automatic gain control has no effect on these channels. handsfree transmit amplifier ( pins hftx and ln) the tea1098a has an asymmetrical hftx input, which is mainly intended for use in combination with the txo output. the input impedance between pins hftx and gnd is typically 20 k w . the voltage gain between pins hftx and ln is set to 34.7 db. without limitation from the output, the input stage can accommodate signals up to 95 mv (rms) at room temperature for 2% of thd. the hftx input is biased at two diodes voltage. automatic gain control is provided for line loss compensation. receive channels (pins ir, reco, garx, earo and evci) rx amplifier ( pins ir, reco and evci) the receive amplifier has one input ir which is referred to the line. the input impedance between pins ir and ln is typically 20 k w and the dc biasing between these pins is equal to one diode voltage. when hfc = 0, the gain between pins ir (referred to ln) and reco is typically 17.0 db which compensates typically 15 db lower than attenuation of the anti-sidetone network. the receive amplifier gain can be digitally increased with the 4-level logic input evci, providing 4 steps of 4.85 db which apply in all handset receive modes. without limitation from the output, the input stage can accommodate signals up to 50 mv (rms) at room temperature for 2% of thd. when hfc = 1, the gain is set automatically to 29.7 db which compensate the anti-sidetone network attenuation minus 2.3 db. this receive amplifier has a rail-to-rail output reco, which is designed for use with high ohmic (real) loads (larger than 5 k w ). this output is biased at two diodes voltage. automatic gain control is provided for line loss compensation. e arpiece amplifier ( pins garx and earo) the earpiece amplifier is an operational amplifier having its output (earo) and its inverting input (garx) available. its input signal comes, via a decoupling capacitor, from the receive output reco. it is used in combination with two resistors to get the required gain or attenuation compared to the receive gain. the typical resistor ratio is 4, which gives a 12 db gain. the gain range can be chosen between 0 db and 20 db. two external capacitors c gar (connected between pins gar and earo) and c gars (connected between pins gar and gnd) ensure stability. the c gar capacitor provides a first-order low-pass filter. the cut-off frequency corresponds to the time constant c gar r e2 . the relationship c gars >=10 c gar must be fulfilled. the earpiece amplifier has a rail-to-rail output earo, biased at two diodes voltage. it is designed for use with low ohmic (real) loads (150 w ) or capacitive loads (100 nf in series with 100 w ). 2000 mar 21 12 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a agc (pin agc) the tea1098a performs automatic line loss compensation, which fits well with the true line attenuation. the automatic gain control varies the gain of some transmit and receive amplifiers in accordance with the dc line current. the control range is 6.45 db for g v(mic-ln) and g v(ir-reco) and 6.8 db for g v(hftx-ln) , which corresponds approximately to a line length of 5.5 km for a 0.5 mm twisted-pair copper cable. to enable this gain control, pin agc must be shorted to pin ln. the start current for compensation corresponds to a line current of typically 23 ma and the stop current to 57 ma. the start current can be increased by connecting an external resistor between pins agc and ln. it can be increased up to 40 ma (using a resistor typically 80 k w ). the start and stop current will be maintained in a ratio equal to 2.5. by leaving the agc pin open-circuit, the gain control is disabled and no line loss compensation is performed. handsfree application as can be seen from fig.4, a loop is formed via the sidetone network in the line interface part and the acoustic coupling between loudspeaker and microphone of the handsfree part. when this loop gain is greater than 1, howling occurs. in a full duplex application this would be the case. the loop-gain has to be much lower than 1 and therefore has to be decreased to avoid howling. this is achieved by the duplex controller. the duplex controller of the tea1098a detects which channel has the largest signal and then controls the gains of the microphone and loudspeaker amplifiers so that the sum of the gains remains constant. as a result, in handsfree application, the circuit can be in three stable modes: 1. transmit mode (tx mode). the gain of the microphone amplifier is at its maximum and the gain of the loudspeaker amplifier is at its minimum. 2. receive mode (rx mode). the gain of the loudspeaker amplifier is at its maximum and the gain of the microphone amplifier is at its minimum. 3. idle mode. the gain of the amplifiers is halfway between their maximum and minimum value. the difference between the maximum gain and minimum gain is called the switching range. fig.7 handsfree telephone set principles. handbook, full pagewidth mgm299 duplex control hybrid telephone line sidetone acoustic coupling 2000 mar 21 13 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a handsfree microphone channel ( pins txi, gatx, txo and gndtx; see fig.8) the tea1098a has an asymmetrical handsfree microphone input (pin txi) with an input resistance of 20 k w . the dc biasing of the input is 0 v. the gain of the input stage varies according to the mode of the tea1098a. in the transmit mode, the gain is at its maximum; in the receive mode, it is at its minimum and in the idle mode, it is halfway between maximum and minimum. switch-over from one mode to the other is smooth and click-free. the output txo is biased at two diodes voltage and has a current capability equal to 20 m a (rms). in the transmit mode, the overall gain of the microphone amplifier (from pins txi to txo) can be adjusted from 0 db up to 31 db to suit specific application requirements. the gain is proportional to the value of r gatx and equals 15.2 db with r gatx = 30.1 k w . without limitation from the output, the microphone input stage can accommodate signals up to 18 mv (rms) at room temperature for 2% of thd. l oudspeaker channel handbook, full pagewidth fca150 v i i v c mic v bb r mic txi from voice switch to envelope detector gndtx txo gatx 31 (28) (27) 30 (26) 29 (29) 32 r gatx fig.8 handsfree microphone channel handbook, full pagewidth fca151 dynamic limiter volume control i v v i dlc lsao gals lvci hfrx 15 (11) 16 (12) 13 (8) 6 (1) 5 (42) evci 4 (41) v bb r gals c gals c lsao c dlc to logic to/from voice switch to envelope detector fig.9 loudspeaker channel. 2000 mar 21 14 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a loudspeaker ampli?er (pins hfrx, gals and lsao) the tea1098a has an asymmetrical input for the loudspeaker amplifier with an input resistance of 20 k w between pins hfrx and gnd. it is biased at two diodes voltage. without limitation from the output, the input stage can accommodate signals up to 580 mv (rms) at room temperature for 2% of thd. the gain of the input stage varies according to the mode of the tea1098a. in the receive mode, the gain is at its maximum; in the transmit mode, it is at its minimum and in the idle mode, it is halfway between maximum and minimum. switch-over from one mode to the other is smooth and click-free. the rail-to-rail output stage is designed to power a loudspeaker connected as a single-ended load (between pins lsao and gnd). in the receive mode, the overall gain of the loudspeaker amplifier can be adjusted from 0 db up to 35 db to suit specific application requirements. the gain from hfrx to lsao is proportional to the value of r gals and equals 28 db with r gals = 255 k w . a capacitor connected in parallel with r gals is recommended and provides a first-order low-pass filter. digital volume control (pins lvci and evci) the loudspeaker amplifier gain can be adjusted (attenuated) with the lvci logic input (as msb) and the 4-level input evci (as lsbs). this combination provides 8 steps of - 4 db which applies in all handsfree receive modes. dynamic limiter (pin dlc) the dynamic limiter of the tea1098a prevents clipping of the loudspeaker output stage and protects the operation of the circuit when the supply voltage at v bb falls below 2.7 v. hard clipping of the loudspeaker output stage is prevented by rapidly reducing the gain when the output stage starts to saturate. the time in which gain reduction is effected (clipping attack time) is approximately a few milliseconds. the circuit stays in the reduced gain mode until the peaks of the loudspeaker signals no longer cause saturation. the gain of the loudspeaker amplifier then returns to its normal value within the clipping release time (typically 250 ms). both attack and release times are proportional to the value of the capacitor c dlc . the total harmonic distortion of the loudspeaker output stage, in reduced gain mode, stays below 2% up to 10 db (minimum) of input voltage overdrive [providing v hfrx is below 580 mv (rms)]. when the supply voltage drops below an internal threshold voltage of 2.7 v, the gain of the loudspeaker amplifier is rapidly reduced (approximately 1 ms). when the supply voltage exceeds 2.7 v, the gain of the loudspeaker amplifier is increased again. by forcing a level lower than 0.2 v on pin dlc, the loudspeaker amplifier is muted and the tea1098a is automatically forced into the transmit mode. d uplex controller signal and noise envelope detectors (pins tsen, tenv, tnoi, rsen, renv and rnoi) the signal envelopes are used to monitor the signal level strength in both channels. the noise envelopes are used to monitor background noise in both channels. the signal and noise envelopes provide inputs for the decision logic. the signal and noise envelope detectors are illustrated in fig.10. for the transmit channel, the input signal at pin txi is 40 db amplified to tsen. for the receive channel, the input signal at pin hfrx is 0 db amplified to rsen. the signals from tsen and rsen are logarithmically compressed and buffered to tenv and renv respectively. the sensitivity of the envelope detectors is set with r tsen and r rsen . the capacitors connected in series with the two resistors block any dc component and form a first-order high-pass filter. in the basic application (see fig.18) it is assumed that v txi = 1 mv (rms) and v hfrx = 100 mv (rms) nominal and both r tsen and r rsen have a value of 10 k w . with the value of c tsen and c rsen at 100 nf, the cut-off frequency is at 160 hz. the buffer amplifiers feeding the compressed signals to pins tenv and renv have a maximum source current of 120 m a and a maximum sink current of 1 m a. capacitors c tenv and c renv set the timing of the signal envelope monitors. in the basic application, the value of both capacitors is 470 nf. because of the logarithmic compression, each 6 db signal increase means 18 mv increase of the voltage on the envelopes tenv or renv at room temperature. thus, timings can be expressed in db/ms. at room temperature, the 120 m a sourced current corresponds to a maximum rise-slope of the signal envelope of 85 db/ms. this is sufficient to track normal speech signals. the 1 m a current sunk by tenv or renv corresponds to a maximum fall-slope of 0.7 db/ms. this is sufficient for a smooth envelope and also eliminates the effect of echoes on switching behaviour. 2000 mar 21 15 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a handbook, full pagewidth fca152 log 9 (4) 8 (3) 7 (2) 11 (6) 12 (7) 10 (5) log from microphone amplifier from loudspeaker amplifier duplex controller tsen r tsen c tsen c tenv c tnoi r rsen c rsen c renv c rnoi tenv tnoi rsen renv rnoi to logic to logic fig.10 signal and noise envelope detectors. fig.11 signal and noise envelope waveforms. handbook, full pagewidth mbg354 input signal signal envelope noise envelope 4 mv (rms) 1 mv (rms) a c c 36 mv 36 mv b b b a b time a: 85 db/ms b: 0.7 db/ms b: 0.7 db/ms c: 0.07 db/ms to determine the noise level, the signals on pins tenv and renv are buffered to pins tnoi and rnoi. these buffers have a maximum source current of 1 m a and a maximum sink current of 120 m a. capacitors c tnoi and c rnoi set the timing. in the basic application, see fig.18, the value of both capacitors is 4.7 m f. at room temperature, the 1 m a sourced current corresponds to a maximum rise-slope of the noise envelope of approximately 0.07 db/ms. this is small enough to track background noise and not to be influenced by speech bursts. the 120 m a current that is sunk corresponds to a maximum fall-slope of approximately 8.5 db/ms. however, during the decrease of the signal envelope, the noise envelope tracks the signal envelope so it will never fall faster than approximately 0.7 db/ms. the behaviour of the signal envelope and noise envelope monitors is illustrated in fig.11. 2000 mar 21 16 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a decision logic (pins idt and swt) handbook, full pagewidth fca153 13 mv 13 mv tenv tnoi renv from logic from dynamic limiter rnoi v dt xx11 - 10 m a + 10 m a + 10 m a x10x 1x0x xx10 0 000x 0 v ref r idt c swt swt (25) 28 (24) 27 8 (3) 7 (2) 12 (7) 10 (5) idt duplex controller logic (1) attenuator fig.12 decision logic. (1) when dlc < 0.2 v, - 10 m a is forced. the tea1098a selects its mode of operation (transmit, receive or idle mode) by comparing the signal and the noise envelopes of both channels. this is executed by the decision logic. the resulting voltage on pin swt is the input for the voice-switch. to facilitate the distinction between signal and noise, the signal is considered as speech when its envelope is more than 4.3 db above the noise envelope. at room temperature, this is equal to a voltage difference v env - v noi = 13 mv. this so-called speech/noise threshold is implemented in both channels. the signal on pin txi contains both speech and the signal from the loudspeaker (acoustic coupling). when receiving, the contribution from the loudspeaker overrules the speech. as a result, the signal envelope on pin tenv is formed mainly by the loudspeaker signal. to correct this, an attenuator is connected between pin tenv and the tenv/renv comparator. its attenuation equals that applied to the microphone amplifier. when a dial tone is present on the line, without monitoring, the tone would be recognized as noise because it is a signal with a constant amplitude. this would cause the tea1098a to go into the idle mode and the user of the set would hear the dial tone fade away. to prevent this, a dial tone detector is incorporated which, in standard applications, does not consider input signals between hfrx and gnd as noise when they have a level greater than 25 mv (rms). this level is proportional to r rsen . 2000 mar 21 17 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a in the same way, a transmit detector is integrated which, in standard applications, does not consider input signals between pins txi and gndtx as noise when they have a level greater than 0.75 mv (rms). this level is proportional to r tsen . as can be seen from fig.12, the output of the decision logic is a current source. the logic table gives the relationship between the inputs and the value of the current source. it can charge or discharge the capacitor c swt with a current of 10 m a (switch-over). if the current is zero, the voltage on pin swt becomes equal to the voltage on pin idt via the high-ohmic resistor r idt (idling). the resulting voltage difference between pins swt and idt determines the mode of the tea1098a and can vary between - 400 and +400 mv (see table 1). table 1 modes of tea1098a the switch-over timing can be set with c swt , the idle mode timing with c swt and r idt . in the basic application given in fig.18, c swt is 220 nf and r idt is 2.2 m w . this enables a switch-over time from transmit to receive mode or vice-versa of approximately 13 ms (580 mv swing on pin swt). the switch-over time from idle mode to transmit mode or receive mode is approximately 4 ms (180 mv swing on pin swt). the switch-over time, from receive mode or transmit mode to idle mode is equal to 4 r idt c swt and is approximately 2 seconds (idle mode time). the input at pin dlc overrules the decision logic. when the voltage on pin dlc goes lower than 0.2 v, the capacitor c swt is discharged with 10 m a thus resulting in the transmit mode. voice-switch (pins stab and swr) a diagram of the voice-switch is illustrated in fig.13. with the voltage on pin swt, the tea1098a voice-switch regulates the gains of the transmit and the receive channels so that the sum of both is kept constant. in the transmit mode, the gain of the microphone amplifier is at its maximum and the gain of the loudspeaker amplifier is at its minimum. in the receive mode, the opposite applies. in the idle mode, both microphone and loudspeaker amplifier gains are halfway. the difference between maximum and minimum is the so called switching range. this range is determined by the ratio of r swr and r stab and is adjustable between 0 and 52 db. r stab should be 3.65 k w and sets an internally used reference current. in the basic application diagram given in fig.18, r swr is 365 k w which results in a switching range of 40 db. the switch-over behaviour is illustrated in fig.14. in the receive mode, the gain of the loudspeaker amplifier can be reduced using the volume control. since the voice-switch keeps the sum of the gains constant, the gain of the microphone amplifier is increased at the same time (see dashed curves in fig.14). in the transmit mode, however, the volume control has no influence on the gain of the microphone amplifier or the gain of the loudspeaker amplifier. consequently, the switching range is reduced when the volume is reduced. at maximum reduction of volume, the switching range becomes 0 db. v swt - v idt (mv) mode < - 180 transmit mode 0 idle mode >180 receive mode g vtx + g vrx = c (1) voice switch r stab r swr stab 25 (21) 26 (22) swr to microphone amplifier from swt from volume control to loudspeaker amplifier duplex controller fca154 fig.13 voice switch. (1) c = constant. 2000 mar 21 18 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a logic inputs the actions of the logic inputs bpc and mute, combined with the hfc input are detailed in the table 2. table 2 table of switch management logic inputs features application hfc mute bpc 0 0 0 dtmf to reco; reco to earo; mics is active handset beep mode 0 0 1 dtmf to ln; dtmf to reco; reco to earo; mics is active handset dialling mode 0 1 0 ir to reco; reco to earo; mics is active handset secret mode 0 1 1 mic to ln; ir to reco; reco to earo; mics is active handset conversation mode 1 0 0 dtmf to reco; hfrx to lsao; mics is active handsfree beep mode 1 0 1 dtmf to ln; dtmf to reco; hfrx to lsao; mics is active handsfree dialling mode 1 1 0 ir to reco; hfrx to lsao; mics is active handsfree secret mode 1 1 1 txi to txo; hftx to ln; ir to reco; hfrx to lsao; mics is active handsfree conversation mode handbook, full pagewidth - 400 - 200 0 + 400 + 200 g vtx , g vrx (10 db/div) v swt - v idt (mv) g vtx + 24 db + 16 db idle mode + 8 db g vtx(min) g vrx(max) - 8 db - 16 db - 24 db tx mode rx mode g vrx fca155 fig.14 switch-over behaviour. 2000 mar 21 19 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a limiting values thermal characteristics symbol parameter conditions min. max. unit v ln positive continuous line voltage - 0.4 12 v repetitive line voltage during switch-on or line interruption - 0.4 13.2 v v n(max) maximum voltage on pins reg, slpe, ir and agc - 0.4 v ln + 0.4 v maximum voltage on all other pins except v dd - 0.4 v bb + 0.4 v i line maximum line current - 130 ma p tot total power dissipation t amb =75 c TEA1098ATV (see fig.15) - 400 mw tea1098ah (see fig.16) - 720 mw t stg ic storage temperature - 40 +125 c t amb ambient temperature - 25 +75 c symbol parameter conditions value unit r th(j-a) thermal resistance from junction to ambient in free air TEA1098ATV 117 k/w tea1098ah 66 k/w 2000 mar 21 20 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a handbook, full pagewidth 160 0 2 8 (3) 10 i line (ma) 6 4 120 40 80 12 v slpe (v) fca177 (5) (6) (2) (4) (1) line t amb ( c) p tot (mw) (1) 25 790 (2) 35 710 (3) 45 630 (4) 55 550 (5) 65 470 (6) 75 390 fig.15 safe operating area (TEA1098ATV) 2000 mar 21 21 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a handbook, full pagewidth 160 0 2 10 i line (ma) 8 6 4 120 40 80 12 v slpe (v) fca178 (1) (2) (5) (6) (3) (4) line t amb ( c) p tot (mw) (1) 25 1290 (2) 35 1250 (3) 45 1110 (4) 55 975 (5) 65 835 (6) 75 695 fig.16 safe operating area (tea1098ah). 2000 mar 21 22 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a characteristics i line = 15 ma; r slpe =20 w ;z line = 600 w ; f = 1 khz; t amb =25 c; agc pin connected to ln; pd = high; hfc = low; mute = high; bpc = high; all dc levels are referenced to gnd; unless otherwise speci?ed. symbol parameter conditions min. typ. max. unit supplies l ine interface and internal supply ( pins ln, slpe, reg and v bb ) v slpe stabilized voltage between slpe and gnd i line = 15 ma 3.4 3.7 4 v i line = 70 ma 5.7 6.1 6.5 v v ref stabilized voltage with an external resistor r va between reg and slpe r va =40k w- 4.5 - v d v ref (t) stabilized voltage variation with temperature referenced to 25 c t amb = - 25 to +75 c - 60 - mv v ln line voltage i line =1ma - 1.55 - v i line =4ma - 2.35 - v i line = 15 ma 3.7 4.0 4.3 v i line = 130 ma - 8.7 9.3 v v bb regulated supply voltage for internal circuitry i line = 15 ma; i vbb = 0 2.75 3.0 3.25 v i line = 70 ma; i vbb = 0 4.9 5.3 5.7 v i line line current for voltage increase start current - 18 - ma stop current - 45 - ma d v bb (t) regulated voltage variation with temperature referenced to 25 c t amb = - 25 to +75 c - 30 - mv i bb current available on pin v bb in speech mode - 11 - ma in handsfree mode - 9 - ma s upply for peripherals ( pin v dd ) v dd supply output voltage v bb > 3.35 v + 0.25 v (typ.) 3.1 3.35 3.6 v otherwise - v bb - 0.25 - v d v dd (t) regulated voltage variation with temperature referenced to 25 c t amb = - 25 to +75 c; v bb > 3.35 v + 0.25 v (typ.) - 30 - mv i dd current consumption on v dd in trickle mode; i line = 0 ma; v dd = 1.5 v; v bb discharging - 15 150 na i vdd current sunk from external source in ringer mode; i line =0; v dd = 3.35 v -- 75 ma 2000 mar 21 23 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a i dd(o) current available for peripherals v dd = 3.3 v -- 3 - ma s upply for microphone ( pin mics) v mics supply voltage for a microphone - 2.0 - v p ower - down input ( pin pd) v il low-level input voltage - 0.4 - 0.3 v i i(pd)(l) input current at low voltage -- 3 - 6 m a v ih high-level input voltage 1.4 - v bb + 0.3 v i bb(pd) current consumption on v bb during power-down phase pd=low - 460 -m a preampli?er inputs (pins mic+, mic - , ir, dtmf, txi, hftx and hfrx) ? z i(mic) ? input impedance differential between pins mic+ and mic - - 70 - k w single-ended between pins mic+/mic - and gndtx - 35 - k w ? z i(ir) ? input impedance between pins ir and ln - 20 - k w ? z i(dtmf) ? input impedance between pins dtmf and gnd - 20 - k w ? z i(txi) ? input impedance between pins txi and gndtx - 20 - k w ? z i(hftx) ? input impedance between pins hftx and gnd - 20 - k w ? z i(hfrx) ? input impedance between pins hfrx and gnd - 20 - k w tx ampli?ers tx handset microphone amplifier ( pins mic+, mic - and ln) g v(mic-ln) voltage gain from pin mic+/mic - to ln v mic = 5 mv (rms) 43.3 44.3 45.3 db d g v(f) gain variation with frequency referenced to 1 khz f = 300 to 3400 hz - 0.25 - db symbol parameter conditions min. typ. max. unit 2000 mar 21 24 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a d g v(t) gain variation with temperature referenced to 25 c t amb = - 25 to +75 c - 0.25 - db cmrr common mode rejection ratio - 80 - db thd total harmonic distortion at ln v ln = 1.4 v (rms) -- 2% i line = 4 ma; v ln = 0.12 v (rms) -- 10 % v no(ln) noise output voltage at pin ln; pins mic+/mic - shorted through 200 w psophometrically weighted (p53 curve) -- 77 - dbmp d g v(mute) gain reduction when muted mute = 0; see table 2 60 80 - db d g v(mic)(mute) gain reduction in microphone mute mode v mic = 10 mv (rms); mute = 1; bpc = 0; see table 2 60 -- db dtmf amplifier ( pins dtmf, ln and reco) g v(dtmf-ln) voltage gain from pin dtmf to ln v dtmf = 50 mv (rms) 24.35 25.35 26.35 db d g v(f) gain variation with frequency referenced to 1 khz f = 300 to 3400 hz - 0.25 - db d g v(t) gain variation with temperature referenced to 25 c t amb = - 25 to +75 c - 0.25 - db d g v(mute) gain reduction if not active mute = 1; see table 2 60 80 - db g v(dtmf-reco) voltage gain from pin dtmf to reco in handsfree mode v dtmf = 50 mv (rms); mute = 0; hfc = 1 -- 17 - db g v(dtmf-reco) voltage gain from pin dtmf to reco in handset mode v dtmf = 50 mv (rms); mute = 0; hfc = 0; evci = 0 -- 28.2 - db d g v(dtmf-reco) digital volume control adjustment range in handset mode v dtmf = 50 mv (rms); mute = 0; hfc = 0 -- 12.75 - db d g v(dtmf-reco) digital volume control adjustment step in handset mode mute = 0; hfc = 0; per step -+ 4.25 - db symbol parameter conditions min. typ. max. unit 2000 mar 21 25 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a tx amplifier using hftx ( pins hftx and ln) g v(hftx-ln) voltage gain from pin hftx to ln v hftx = 15 mv (rms) 33.5 34.7 35.9 db d g v(f) gain variation with frequency referenced to 1 khz f = 300 to 3400 hz - 0.25 - db d g v(t) gain variation with temperature referenced to 25 c t amb = - 25 to +75 c - 0.35 - db thd total harmonic distortion at ln v ln = 1.4 v (rms) -- 2% v hftx(rms) maximum input voltage at hftx (rms value) i line = 70 ma; thd = 2% - 85 - mv v no(ln) noise output voltage at pin ln; pin hftx shorted to gnd through 200 w in series with 10 m f psophometrically weighted (p53 curve) -- 77 - dbmp d g v(m) gain reduction when muted mute = 0; see table 2 60 80 - db d g v(mic)(mute) gain reduction in microphone mute mode mute = 1; bpc = 0; see table 2 60 -- db rx ampli?ers rx amplifiers using ir ( pins ir and reco) g v(ir-reco)(hf) voltage gain from ir to reco (handsfree mode) v ir = 4 mv (rms); hfc = 1 28.4 29.4 30.4 db g v(ir-reco)(hs) voltage gain from ir to reco (handset mode) v ir = 4 mv (rms); hfc = 0; evci = 0 16.2 17.2 18.2 db d g v(ir-reco) digital volume control adjustment range in handset mode v ir = 4 mv (rms); hfc = 0; evci = v dd 13 14.5 16 db d g v(ir-reco) digital volume control adjustment step in handset mode hfc = 0; per step - +4.85 - db d g v(f) gain variation with frequency referred to 1 khz f = 300 to 3400 hz - 0.25 - db d g v(t) gain variation with temperature referenced to 25 c t amb = - 25 to +75 c - 0.3 - db v ir(rms)(max) maximum input voltage on ir (referenced to ln) (rms value) i line = 70 ma; thd = 2% - 50 - mv symbol parameter conditions min. typ. max. unit 2000 mar 21 26 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a v reco(rms)(max) maximum output voltage on reco (rms value) thd = 2%; g v(reco-earo) =12db 0.75 0.9 - v v no(reco)(rms) noise output voltage at pin reco; pin ir is an open-circuit (rms value) psophometrically weighted (p53 curve) -- 84 - dbvp d g v(mute) gain reduction if not active mute = 0; see table 2 60 80 - db rx earpiece amplifier ( pins garx and earo) d g v(reco-earo) gain voltage range between pins reco and earo 0 - +20 db v earo(rms)(max) maximum output voltage on earo (rms value) sine wave drive; r l = 150 w ; thd < 2% 0.75 0.9 - v v no(earo)(rms) noise output voltage at pin earo; pin ir is an open-circuit (rms value) g v(earo) = 12 db; evci = 0; psophometrically weighted (p53 curve) -- 84 - dbvp automatic gain control (pin agc) d g v(trx) gain control range for transmit and receive signals affected by the agc; with respect to i line =15ma i line = 70 ma; g v(mic - ln) ; g v(ir-reco) ; r agc =0; 5.45 6.45 7.45 db i line = 70 ma for g v(hftx - ln) ; r agc =0 5.8 6.8 7.8 db i start highest line current for maximum gain - 23 - ma i stop lowest line current for maximum gain - 57 - ma d i start i start adjustment range with r agc -- 40 ma logic inputs (pins hfc, mute, and bpc) v il low-level input voltage - 0.4 - 0.3 v v ih high-level input voltage 1.4 - v bb + 0.3 v i i(l) input current at low voltage v bb = 3.0 v for pin hfc - 0 -m a for pin mute -- 5 -m a for pin bpc -- 2.5 -m a symbol parameter conditions min. typ. max. unit 2000 mar 21 27 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a i i(h) input current at high voltage v bb = 3.0 v for pin hfc - 2.5 -m a for pin mute - 0 -m a for pin bpc - 0 -m a handsfree mode (hfc = high) hf microphone amplifier ( pins txi, txo and gatx) g v(txi-txo) voltage gain from pin txi to txo v txi = 3 mv (rms); r gatx = 30.1 k w 12.7 15.2 17.7 db d g v voltage gain adjustment with r gatx - 15 - +16 db d g v(f) gain variation with frequency referenced to 1 khz f = 300 to 3400 hz - 0.1 - db d g v(t) gain variation with temperature referenced to 25 c t amb = - 25 to +75 c - 0.15 - db v no(txo)(rms) noise output voltage at pin txo; pin txi is shorted through 200 w and 10 m f to gndtx psophometrically weighted (p53 curve); g v(txi) = 15 db; rms value -- 101 - dbvp d g v(mute) gain reduction when muted mute = 0; see table 2 60 80 - db d g v(sec) gain reduction in secret mode v txi = 10 mv (rms); mute = 1; bpc = 0; see table 2 60 -- db hf loudspeaker amplifier ( pins hfrx, lsao, gals and dlc) g v(hfrx-lsao) nominal voltage gain from pin hfrx to lsao v hfrx = 30 mv (rms); r gals = 255 k w; lvci=v dd ; evci = v dd 24.5 27 29.5 db d g v(hfrx-lsao ) digital volume control adjustment range v hfrx = 30 mv (rms); r gals = 255 k w 25.5 27 28.5 db d g v(step) digital volume adjustment step per step - 3.85 - db d g v voltage gain adjustment with r gals - 28 - +7 db d g v(f) gain variation with frequency referenced to 1 khz f = 300 to 3400 hz - 0.3 - db d g v(t) gain variation with temperature referenced to 25 c t amb = - 25 to +75 c - 0.3 - db v hfrx(rms)(max) maximum input voltage at pin hfrx (rms value) i line = 70 ma; r gals =33k w ; for 2% thd in the input stage - 580 - mv symbol parameter conditions min. typ. max. unit 2000 mar 21 28 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a v no(lsao)(rms) noise output voltage at pin lsao; pin hfrx is open-circuit (rms value) psophometrically weighted (p53 curve); lvci = v dd ; evci = v dd -- 79 - dbvp d g v(mute) gain reduction if not active see table 2 60 -- db v lsao(rms) output voltage capability at pin lsao with sine wave signal and loaded with 50 w + 220 m f; g vlsao = 28 db i bb = 1 ma; i dd =1ma -- - i line =18ma - 0.9 - v i line =30ma - 1.3 - v i line >50ma - 1.6 - v i lsao(max) maximum output current at pin lsao (peak value) 150 300 - ma d ynamic limiter ( pins lsao and dlc) t att attack time when v hfrx jumps up from 20 mv to 20 mv +10 db -- 5ms when v bb drops below v bb(th) - 1 - ms t rel release time when v hfrx jumps down from 20 mv +10 db to 20 mv - 100 - ms thd total harmonic distortion v hfrx = 20 mv + 10 db; g v(lsao) = 28 db; t > t att - 12 % v bb(th) v bb limiter threshold - 2.7 - v m ute receive ( pin dlc) v dlc(th) threshold voltage required on pin dlc to obtain mute receive condition -- 0.2 v i dlc(th) start-up current sourced by pin dlc v dlc = 0.2 v - 100 -m a d g vrx(m) voltage gain reduction in mute receive condition v dlc = 0.2 v 60 80 - db tx and rx envelope and noise detectors ( pins tsen, tenv, tnoi, rsen, renv and rnoi) preampli?ers g v(tsen) voltage gain from pin txi to tsen - 40 - db g v(rsen) voltage gain from pin hfrx to rsen - 0 - db symbol parameter conditions min. typ. max. unit 2000 mar 21 29 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a logarithmic compressor and sensitivity adjustment d v det(tsen) sensitivity detection on pin tsen; voltage change on pin tenv when doubling the current from tsen i tsen = 0.8 to 160 m a - 18 - mv d v det(rsen) sensitivity detection on pin rsen; voltage change on pin renv when doubling the current from rsen i rsen = 0.8 to 160 m a - 18 - mv signal envelope detectors i source(env) maximum current sourced from pin tenv or renv - 120 -m a i sink(env) maximum current sunk by pin tenv or renv - 1.25 - 1 - 0.75 m a d v env voltage difference between renv and tenv 10 m a sourced from both rsen and tsen; signal detectors tracking; note 1 - 3 - mv noise envelope detectors i source(noi) maximum current sourced from pin tnoi or rnoi 0.75 1 1.25 m a i sink(noi) maximum current sunk by pin tnoi or rnoi -- 120 -m a d v noi voltage difference between pins rnoi and tnoi when 5 m a is sourced from both rsen and tsen; noise detectors tracking; note 1 - 3 - mv d ial tone detector v hfrx(th)(rms) threshold level at pin hfrx (rms value) r rsen =10k w ; c rsen = 100 nf - 25 - mv tx level limiter v txi(th)(rms) threshold level at pin txi (rms value) r tsen =10k w- 0.75 - mv d ecision logic ( pins idt and swt) signal recognition d v strx(th) threshold voltage between renv/rnoi or between tenv/tnoi to switch-over from idle mode to rx/tx mode v hfrx 2000 mar 21 31 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a this text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the acrobat reader .this text is here in _ white to force landscape pages to be rotated correctly when browsing through the pdf in the acrobat reader.this text is here inthis text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the acrobat reader. white to force landscape pages to be ... test and application information a ndbook, full pagewidth fca145 c ir 100 nf c emc 10 nf i = 15 ma j i line c imp 100 m f c reg 4.7 m f c vbb 470 m f c vdd 47 m f z imp 620 w e ir v = sin v hfrx r slpe 20 w r mic 200 w c dtmf 100 nf r gatx 30.1 k w r lsao 50 w pd hfc mute earo garx reco hfrx gals lsao dtmf gatx txo mic - mic + slpe reg agc ln v bb v dd ir 18 (14) 20 (16) 22 (18) 19 (15) 14 (10) 23 (19) 21 (17) 24 (20) 34 (31) 33 (30) 39 (36) 29 (26) 30 (27) 31 (28) 35 (32) 9 (4) 8 (3) 7 (2) 17(13) 32 (29) 25 (21) 26 (22) 13 (8) 27 (24) (25) 28 (5) 10 (7) 12 (6) 11 (12) 16 (11) 15 (1) 6 (35) 38 (34) 37 (33) 36 (39) 2 (37) 40 (38) 1 c hftx 100 nf hftx mics c txin 100 nf txi tea1098a c gar 100 pf c gars 1 nf c gals 150 pf c rxe 100 nf c hfrx 100 nf c lsao 220 m f r e2 100 k w r qr 150 w r e1 100 k w r gals 255 k w d z v d = 10 v c mics 4.7 m f c qr 4.7 m f v mic v dtmf v txi v hftx tnoi tenv tsen c tnoi 4.7 m f c tenv 470 nf c tsen 100 nf r tsen 10 k w r stab 3.65 k w r swr 365 k w c dlc 470 nf c swt 220 nf gnd gndtx stab r idt 2.2 m w swr dlc swt idt c rnoi 4.7 m f c renv 470 nf c rsen 100 nf r rsen 10 k w rnoi renv rsen fig.17 test configuration. 2000 mar 21 32 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a this text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the acrobat reader .this text is here in _ white to force landscape pages to be rotated correctly when browsing through the pdf in the acrobat reader.this text is here inthis text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the acrobat reader. white to force landscape pages to be ... d book, full pagewidth fca146 r tx3 8.2 k w r ast1 130 k w r ast2 3.92 k w r bal1 130 w r slpe 20 w c reg 4.7 m f c vbb 470 m f c vdd 47 m f c bal 220 nf r bal2 820 w 15 k w c lsao 220 m f tea1098a gnd gndtx stab r idt 2.2 m w swr dlc swt c qr 10 m f idt rnoi renv rsen pd tnoi tenv tsen txi gatx txo hftx mic - mic + mics ir slpe reg agc ln dtmf c dtmf 100 nf c hftx 100 nf c ir 100 nf c txin 100 nf r gatx 30.1 k w z imp 620 w r micp 1 k w c mics 4.7 m f r bmics 2 k w r micm 1 k w r tx2 392 w r ast3 22 nf c mich 33 nf c emc 10 nf v d = 10 v c imp 22 m f c micb 33 nf c gars 1 nf c tx2 15 k w r tx1 22 nf c tx1 handset micro handsfree micro from mics mics v bb v dd hfc mute from microcontroller earo garx reco hfrx gals lsao r e2 100 k w r e1 100 k w r gals 255 k w c gar 100 pf c gals 150 pf c hfrx 100 nf c rxe 100 nf a b d2 d3 d z d1 d4 c tnoi 4.7 m f c tenv 470 nf c tsen 100 nf r tsen 10 k w r stab 3.65 k w r swr 365 k w c dlc 470 nf c swt 220 nf c rnoi 4.7 m f c renv 470 nf c rsen 100 nf r rsen 10 k w 18 (14) 20 (16) 22 (18) 19 (15) 14 (10) 23 (19) 21 (17) 24 (20) 34 (31) 33 (30) 39 (36) 29 (26) 30 (27) 31 (28) 35 (32) 9 (4) 8 (3) 7 (2) 17 (13) 32 (29) 25 (21) 26 (22) 13 (8) 27 (24) (25) 28 (5) 10 (7) 12 (6) 11 (12) 16 (11) 15 (1) 6 (35) 38 (34) 37 (33) 36 (39) 2 (37) 40 (38) 1 pd hfc mute fig.18 basic application diagram. 2000 mar 21 33 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a package outlines unit a 1 a 2 a 3 b p cd (1) e (2) z (1) eh e ll p qy w v q references outline version european projection issue date iec jedec eiaj mm inches 0.3 0.1 2.45 2.25 0.25 0.42 0.30 0.22 0.14 15.6 15.2 7.6 7.5 0.762 2.25 12.3 11.8 1.15 1.05 0.6 0.3 7 0 o o 0.1 0.1 dimensions (inch dimensions are derived from the original mm dimensions) notes 1. plastic or metal protrusions of 0.4 mm maximum per side are not included. 2. plastic interlead protrusions of 0.25 mm maximum per side are not included. 1.7 1.5 sot158-1 92-11-17 95-01-24 x w m q a a 1 a 2 b p d h e l p q detail x e z e c l v m a (a ) 3 a y 40 20 21 1 pin 1 index 0.012 0.004 0.096 0.089 0.017 0.012 0.0087 0.0055 0.61 0.60 0.30 0.29 0.03 0.089 0.48 0.46 0.045 0.041 0.024 0.012 0.004 0.2 0.008 0.004 0.067 0.059 0.010 0 5 10 mm scale vso40: plastic very small outline package; 40 leads sot158-1 a max. 2.70 0.11 2000 mar 21 34 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a unit a 1 a 2 a 3 b p ce (1) eh e ll p z y w v q references outline version european projection issue date iec jedec eiaj mm 0.25 0.05 1.85 1.65 0.25 0.40 0.20 0.25 0.14 10.1 9.9 0.8 1.3 12.9 12.3 1.2 0.8 10 0 o o 0.15 0.1 0.15 dimensions (mm are the original dimensions) note 1. plastic or metal protrusions of 0.25 mm maximum per side are not included. 0.95 0.55 sot307-2 95-02-04 97-08-01 d (1) (1) (1) 10.1 9.9 h d 12.9 12.3 e z 1.2 0.8 d e e b 11 c e h d z d a z e e v m a x 1 44 34 33 23 22 12 y q a 1 a l p detail x l (a ) 3 a 2 pin 1 index d h v m b b p b p w m w m 0 2.5 5 mm scale qfp44: plastic quad flat package; 44 leads (lead length 1.3 mm); body 10 x 10 x 1.75 mm sot307-2 a max. 2.10 2000 mar 21 35 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a soldering introduction there is no soldering method that is ideal for all ic packages. wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. however, wave soldering is not always suitable for surface mounted ics, or for printed-circuits with high population densities. in these situations reflow soldering is often used. this text gives a very brief insight to a complex technology. a more in-depth account of soldering ics can be found in our data handbook ic26; integrated circuit packages (order code 9398 652 90011). re?ow soldering reflow soldering techniques are suitable for all vso packages. reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. several techniques exist for reflowing; for example, thermal conduction by heated belt. dwell times vary between 50 and 300 seconds depending on heating method. typical reflow temperatures range from 215 to 250 c. preheating is necessary to dry the paste and evaporate the binding agent. preheating duration: 45 minutes at 45 c. wave soldering wave soldering techniques can be used for all vso packages if the following conditions are observed: a double-wave (a turbulent wave with high upward pressure followed by a smooth laminar wave) soldering technique should be used. the longitudinal axis of the package footprint must be parallel to the solder flow. the package footprint must incorporate solder thieves at the downstream end. during placement and before soldering, the package must be fixed with a droplet of adhesive. the adhesive can be applied by screen printing, pin transfer or syringe dispensing. the package can be soldered after the adhesive is cured. maximum permissible solder temperature is 260 c, and maximum duration of package immersion in solder is 10 seconds, if cooled to less than 150 c within 6 seconds. typical dwell time is 4 seconds at 250 c. a mildly-activated flux will eliminate the need for removal of corrosive residues in most applications. repairing soldered joints fix the component by first soldering two diagonally- opposite end leads. use only a low voltage soldering iron (less than 24 v) applied to the flat part of the lead. contact time must be limited to 10 seconds at up to 300 c. when using a dedicated tool, all other leads can be soldered in one operation within 2 to 5 seconds between 270 and 320 c. 2000 mar 21 36 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a definitions life support applications these products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify philips for any damages resulting from such improper use or sale. data sheet status objective speci?cation this data sheet contains target or goal speci?cations for product development. preliminary speci?cation this data sheet contains preliminary data; supplementary data may be published later. product speci?cation this data sheet contains ?nal product speci?cations. limiting values limiting values given are in accordance with the absolute maximum rating system (iec 134). stress above one or more of the limiting values may cause permanent damage to the device. these are stress ratings only and operation of the device at these or at any other conditions above those given in the characteristics sections of the speci?cation is not implied. exposure to limiting values for extended periods may affect device reliability. application information where application information is given, it is advisory and does not form part of the speci?cation. 2000 mar 21 37 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a notes 2000 mar 21 38 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a notes 2000 mar 21 39 philips semiconductors preliminary speci?cation speech and handsfree ic tea1098a notes ? philips electronics n.v. sca all rights are reserved. reproduction in whole or in part is prohibited without the prior written consent of the copyright owne r. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. no liability will be accepted by the publisher for any consequence of its use. publication thereof does not con vey nor imply any license under patent- or other industrial or intellectual property rights. internet: http://www.semiconductors.philips.com 2000 69 philips semiconductors C a worldwide company for all other countries apply to: philips semiconductors, international marketing & sales communications, building be-p, p.o. box 218, 5600 md eindhoven, the netherlands, fax. +31 40 27 24825 argentina: see south america australia: 3 figtree drive, homebush, nsw 2140, tel. +61 2 9704 8141, fax. +61 2 9704 8139 austria: computerstr. 6, a-1101 wien, p.o. box 213, tel. +43 1 60 101 1248, fax. +43 1 60 101 1210 belarus: hotel minsk business center, bld. 3, r. 1211, volodarski str. 6, 220050 minsk, tel. +375 172 20 0733, fax. +375 172 20 0773 belgium: see the netherlands brazil: see south america bulgaria: philips bulgaria ltd., energoproject, 15th floor, 51 james bourchier blvd., 1407 sofia, tel. +359 2 68 9211, fax. +359 2 68 9102 canada: philips semiconductors/components, tel. +1 800 234 7381, fax. +1 800 943 0087 china/hong kong: 501 hong kong industrial technology centre, 72 tat chee avenue, kowloon tong, hong kong, tel. +852 2319 7888, fax. +852 2319 7700 colombia: see south america czech republic: see austria denmark: sydhavnsgade 23, 1780 copenhagen v, tel. +45 33 29 3333, fax. +45 33 29 3905 finland: sinikalliontie 3, fin-02630 espoo, tel. +358 9 615 800, fax. +358 9 6158 0920 france: 51 rue carnot, bp317, 92156 suresnes cedex, tel. +33 1 4099 6161, fax. +33 1 4099 6427 germany: hammerbrookstra?e 69, d-20097 hamburg, tel. +49 40 2353 60, fax. +49 40 2353 6300 hungary: see austria india: philips india ltd, band box building, 2nd floor, 254-d, dr. annie besant road, worli, mumbai 400 025, tel. +91 22 493 8541, fax. +91 22 493 0966 indonesia: pt philips development corporation, semiconductors division, gedung philips, jl. buncit raya kav.99-100, jakarta 12510, tel. +62 21 794 0040 ext. 2501, fax. +62 21 794 0080 ireland: newstead, clonskeagh, dublin 14, tel. +353 1 7640 000, fax. +353 1 7640 200 israel: rapac electronics, 7 kehilat saloniki st, po box 18053, tel aviv 61180, tel. +972 3 645 0444, fax. +972 3 649 1007 italy: philips semiconductors, via casati, 23 - 20052 monza (mi), tel. +39 039 203 6838, fax +39 039 203 6800 japan: philips bldg 13-37, kohnan 2-chome, minato-ku, tokyo 108-8507, tel. +81 3 3740 5130, fax. +81 3 3740 5057 korea: philips house, 260-199 itaewon-dong, yongsan-ku, seoul, tel. +82 2 709 1412, fax. +82 2 709 1415 malaysia: no. 76 jalan universiti, 46200 petaling jaya, selangor, tel. +60 3 750 5214, fax. +60 3 757 4880 mexico: 5900 gateway east, suite 200, el paso, texas 79905, tel. +9-5 800 234 7381, fax +9-5 800 943 0087 middle east: see italy netherlands: postbus 90050, 5600 pb eindhoven, bldg. vb, tel. +31 40 27 82785, fax. +31 40 27 88399 new zealand: 2 wagener place, c.p.o. box 1041, auckland, tel. +64 9 849 4160, fax. +64 9 849 7811 norway: box 1, manglerud 0612, oslo, tel. +47 22 74 8000, fax. +47 22 74 8341 pakistan: see singapore philippines: philips semiconductors philippines inc., 106 valero st. salcedo village, p.o. box 2108 mcc, makati, metro manila, tel. +63 2 816 6380, fax. +63 2 817 3474 poland : al.jerozolimskie 195 b, 02-222 warsaw, tel. +48 22 5710 000, fax. +48 22 5710 001 portugal: see spain romania: see italy russia: philips russia, ul. usatcheva 35a, 119048 moscow, tel. +7 095 755 6918, fax. +7 095 755 6919 singapore: lorong 1, toa payoh, singapore 319762, tel. +65 350 2538, fax. +65 251 6500 slovakia: see austria slovenia: see italy south africa: s.a. philips pty ltd., 195-215 main road martindale, 2092 johannesburg, p.o. box 58088 newville 2114, tel. +27 11 471 5401, fax. +27 11 471 5398 south america: al. vicente pinzon, 173, 6th floor, 04547-130 s?o paulo, sp, brazil, tel. +55 11 821 2333, fax. +55 11 821 2382 spain: balmes 22, 08007 barcelona, tel. +34 93 301 6312, fax. +34 93 301 4107 sweden: kottbygatan 7, akalla, s-16485 stockholm, tel. +46 8 5985 2000, fax. +46 8 5985 2745 switzerland: allmendstrasse 140, ch-8027 zrich, tel. +41 1 488 2741 fax. +41 1 488 3263 taiwan: philips semiconductors, 6f, no. 96, chien kuo n. rd., sec. 1, taipei, taiwan tel. +886 2 2134 2886, fax. +886 2 2134 2874 thailand: philips electronics (thailand) ltd., 209/2 sanpavuth-bangna road prakanong, bangkok 10260, tel. +66 2 745 4090, fax. +66 2 398 0793 turkey: yukari dudullu, org. san. blg., 2.cad. nr. 28 81260 umraniye, istanbul, tel. +90 216 522 1500, fax. +90 216 522 1813 ukraine : philips ukraine, 4 patrice lumumba str., building b, floor 7, 252042 kiev, tel. +380 44 264 2776, fax. +380 44 268 0461 united kingdom: philips semiconductors ltd., 276 bath road, hayes, middlesex ub3 5bx, tel. +44 208 730 5000, fax. +44 208 754 8421 united states: 811 east arques avenue, sunnyvale, ca 94088-3409, tel. +1 800 234 7381, fax. +1 800 943 0087 uruguay: see south america vietnam: see singapore yugoslavia: philips, trg n. pasica 5/v, 11000 beograd, tel. +381 11 3341 299, fax.+381 11 3342 553 printed in the netherlands 403502/01/pp 40 date of release: 2000 mar 21 document order number: 9397 750 06808 |
Price & Availability of TEA1098ATV
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |