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ta2160fn 2002-03-28 1 toshiba bipolar integrated circuit silicon monolithic ta2160fn low consumption current stereo headphone amplifier (1.5/3 v use) the ta2160fn is low consumption current stereo headphone amplifier ic for headphone stereo. it is suitable for 1.5 v or 3 v headphone stereo. features low consumption current current value (f = 1 khz, r l = 32 ? , ta = 25 c, typ.) v cc = 1.3 v i ccq = 1.6 ma (no signal) i cc = 4.6 ma (0.1 mw 2 ch) i cc = 8.6 ma (0.5 mw 2 ch) v cc 3 v i ccq = 3.0 ma (no signal) i cc = 4.8 ma (0.1 mw 2 ch) i cc = 8.8 ma (0.5 mw 2 ch) built-in ripple filter preamplifier stage built-in input capacitor for reducing buzz noise input coupling condensor-less built-in preamplifier mute power amplifier stage built-in bass boost function with agc built-in treble boost function built-in input capacitor for reducing buzz noise g v = 25db (typ.) built-in power amplifier mute operating supply voltage range (ta = 25 c) v cc (opr) = 0.95 to 4.5 v weight: 0.17 g (typ.) .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 2 block diagram pre b pre a in b in a v ref v ref in rf in rf out rf out base lpf bst nf bst out pw in c agc in out a out c out b agc det out a r l r l out c out b v cc v cc v ref pre out b pre nf b pre nf a pre out a v ref v ref pre gnd bst sw pw in a pw nf a pw nf b pw in b pw mute pre mute pw gnd agc det v cc v cc bst pw a pw c pw b 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 bst sw rf&ref 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 mute sw 1.5 v set: open 3 v set: on off on on off pw in b pw in a pre out a pre out b on off .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 3 terminal explanation (terminal voltage: typical terminal voltage at no signal with test circuit, v cc 1.3 v, ta 25c) te rminal no. name function internal circuit te rmin al vo l tage (v) 1 pre out b 4 pre out a input of preamplifier 0.44 17 out b 18 out c 19 out a output of power amplifier 0.56 2 pre nf b 3 pre nf a nf of preamplifier 0.7 29 in a 30 in b input of preamplifier 0.73 5 v ref reference circuit 0.73 27 v ref in input of reference circuit 0.73 6 pre gnd 0 7 bst sw boost on/off switch bst on: h level or open bst off: l level refer to application note 3 (2) this switch is the control terminal of the bass boost function. when it is synchronized with treble boost function, the external connection with the pw nf terminal is required. refer to application circuit. 12 pw mute muting switch of power amplifier pw mute off: h level or open pw mute on: l level refer to application note 3 (2) 4 27 5 20 k 7 500 v ref 10 pf 3 29 .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 4 te rminal no. name function internal circuit te rmin al vo l tage (v) 8 pw in a 11 pw in b input of power amplifier (this terminal also has function of add amplifier input.) 0.73 9 pw nf a 10 pw nf b nf of power amplifier 0.72 13 pre mute muting switch of preamplifier pre mute on: h level pre mute off: l level refer to application note 3 (2) 14 agc det smoothing terminal of boost agc circuit 15 pw gnd power gnd for power drive stage 0 16 v cc 1.3 25 base base biasing terminal of transistor for ripple filter 0.6 26 rf out output of ripple filter ripple filter circuit supplies internal circuit except power drive stage with power source 1.24 28 rf in ripple filter terminal 1.24 14 47 k 13 to bst sw 30 k 9 2 k 22 k 22 k to add amplifier v ref v ref 19 8 10 pf 28 25 26 46.5 k 16 rf out v cc .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 5 te rminal no. name function internal circuit te rmin al vo l tage (v) 20 agc in input of boost agc circuit the input level to the boost amplifier is controlled by the input level of this terminal. input impedance: 22 k (typ.) 21 pw inc input of center amplifier 0.73 22 bst out output of boost amplifier 0.73 23 bst nf nf of boost amplifier 0.73 24 lpf low pass filter terminal of bass boost 0.73 30 k 1 pf 2 k 22 k v ref v ref 21 22 k input of power amplifier v ref 24 22 k 100 k 22 k to the center amplifier v ref 22 2 k 23 10 k v ref v ref 20 out c 22 k v ref .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 6 application note 1. preamplifier stage output dc voltage of preamplifier output dc voltage of preamplifier is determined by external resistors r1 and r2 as shown in figure 1. v o (pre) v ref v (r2/r1 1) v ref 0.73 v (typ.) v ref is changed when resistance is connected between rf out terminal and v ref in terminal (refer to application note 3 (1)). v is an offset voltage which is designed to 28.6 mv. it is as follows in case that the dc voltage is calculated by the constant of a test circuit. v o (pre) 0.73 v 28.6 mv (200 k /22 k 1) 0.44 v output dc voltage of preamplifier should be fixed about v cc /2, because preamplifier get a enough dynamic range. 2. power amplifier stage (1) input of power amplifier each input signal should be applied through a capacitor. in case that dc current or dc voltage is applied to each amplifier, the internal circuit has unbalance and the each amplifier doesn?t operate normally. it is advised that input signal refer to v ref voltage, in order to reduce a pop noise or low frequency leak. (2) bass boost function (a) system this ic has the bass boost function in power amplifier stage. after this system adds the low frequency ingredient of side amplifier, it is applied into the center amplifier. and the bass boost level is controlled by the variable impedance circuit (figure 2) flow of the bass boost signal variable impedance circuit boost amplifier center amplifier flow of the bass boost level output of center amplifier agc det (level detection) variable impedance circuit operation the system of treble boost function is realized by frequency characteristic adjustment of the side amplifier. v ref r1 r2 v 28.6 mv figure 1 output dc voltage of preamplifier .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 7 (b) agc circuit the agc circuit of bass boost function is realized by the variable impedance circuit. the agc det circuit detects the low frequency level of center amplifier. when this level becomes high, the variable impedance circuit operates, and this circuit attenuates the input level of center amplifier. the agc det circuit is the current input, so that the output voltage of add amplifier is changed into the current ingredient by resistor rb and capacitor c5 which are shown in figure 2. and it is smoothed and detected by det circuit (pin 14). and the direct current should not be applied to the agc in circuit, because, as for the circuit, the sensitivity setup is high. moreover, the agc signal level is decreased in case that the resistor r5 is connected with the capacitor c5 in series. and the agc point can be changed. but the center amplifier is clipped in the low frequency in case that the resistor r5 is larger. (c) bass boost the signal flow of bass boost function is as follows, refer to figure 3. lpf (internal resistors 2r1 and external capacitor c1) att (variable impedance circuit) hpf (bst amplifier) bpf (lpf: internal resistor r4 and external capacitor c3, hpf: external capacitor c4 and internal resistor r5) center amplifier the center amplifier signal becomes the reverse phase, because the phase of audio frequency range is reversed with two lpfs. 18 pw a pw b pw c r l r l 19 17 bst 22 23 c4 21 rd rc c2 c3 c5 rb flow of the bass boost level 20 agc det att 14 c6 c1 24 ra ra flow of the bass boost signal 11 8 r1 figure 2 bass boost system .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 8 the transfer function of bass boost is as follows from figure 3. g (
) g 1 (
)a 1 g 2 (
)g 3 (
)a 2 the bass boost effect is changed by external resistor or external capacitor. the transfer function and cutoff frequency are as follows. i transfer function of lpf g 1 (
) 1/(1 j
c1r1) f l 1/2 c1r1 ii transfer function of bpf g 3 (
) j
c4r5/[1 j
(r4c3 r5c3 c4r4)
2 r4c3r5c4] c4 r5 c3 r4 1/2 f o iii hpf gain and ct of frequency g 2 (
) 1 r2/(r3 1/j
c2) f hc 1/(2 r3c2) c4 18 pw a pw c r l 19 r5 22 k 21 c3 22 r4 22 k bst 23 c2 r3 2 k r2 100 k att c1 24 2r1 22 k 2r1 22 k 8 11 g 1 ( ) lpf g 2 ( ) hpf a 1 g 3 ( ) bpf a 2 figure 3 block diagram of bass boost response (db) frequency f (hz) 3 10 100 400 bpf 20 10 0 10 20 30 30 lpf hpf total characteristic f o f l a ra ca cb rb figure 4 bpf graph 1 characteristic of bass boost .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 9 iv f o and f l the f l and f o should be set up out of the audio frequency range. in case that the f o and f l is inside of audio frequency range and agc circuit operates, the voltage gain decrease. v hpf the f hc should be made 1/2 or less frequency as compared with the f l and f o . the phase difference is large near the f hc , so that the bass boost level runs short. and the hpf gain of middle or high frequency range should be set to 10db or more. (3) treble boost function this function is realized by using the pw nf terminal. for details, please refer to application note. 3. total (1) changeover of power amplifier output dc voltage at 3 v set. the output dc voltage of the power amplifier is raised by the resistance connected between the rf out terminal and the v ref in terminal. in case of 3 v set, the dynamic range spreads. (2) switch (a) switch terminal the current flows through each terminal, in case that these terminals are connected with h level independently, evevn though the ic off mode. it is necessary to connect an external pull-down resistor with each terminal in case that ic is turned on due to external noise etc. the sensitivity of each switch is set up highly. (b) pop noise it is advised to connect r and c with each switch, to reduce the pop noise in switchover (see fig.1). it is better that the constants are r 100 k ,c 1 f. as for the constants, select the optimum one depending on each a set carefully. 0 10 k 0 2 4 6 8 10 12 0.5 1 1.5 2 2.5 v cc 3 v v ref pw out i ccq 20 k 50 k 100 k 200 k 500 k 1 m quiescent supply current i ccq (ma) resistance (pin 26 ? pin 27) r ( ) v ref , pw out, i ccq ? r reference voltage v ref (v) figure 5 adjutment of output dc voltage v cc r c figure 6 pop noise .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 10 (c) sensitivity voltage of each switch (ta 25c) (3) ripple filter it is necessary to connect a low saturation transistor (2sa1362 etc.) for ripple filter, because this ic doesn?t have transistor for ripple filter. care should be taken to stabilize the ripple filter circuit, because the ripple filter circuit supplies internal circuit except power drive stage with power source. (4) capacitor small temperature coefficient and excellent frequency characteristic is needed by capacitor below. oscillation preventing capacitors for power amplifier output capacitor between v ref and gnd capacitor between v cc and gnd capacitor between rf out and gnd maximum ratings (ta 25c) characteristics symbol rating unit supply voltage v cc 4.5 v output current i o (peak) 100 ma power dissipation p d (note) 550 mw operating temperature t opr 25 75 c storage temperature t stg 55 150 c note: derated above ta 25c in proportion of 4.4 mw/c. terminal voltage v 7 , v 12 (v) supply voltage v cc (v) bst sw, pw mute supply voltage v cc (v) pre mute terminal voltage v 13 (v) 0 0 1 2 3 4 5 1 2 3 4 5 4.5 v 0.8 v 0.3 v h l 0 0 1 2 3 4 5 1 2 3 4 5 4.5 v 0.8 v 0.3 v h l bst sw (v 7 ) pw mute (v 12 ) h level/open bst on power mute off l level bst off power mute on pre mute (v 13 ) h level pre mute on l level pre mute off .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 11 electrical characteristics (unless otherwise specified, v cc 1.3 v, ta 25c, f 1 khz, sw1: a, sw3: a, sw4: a, sw5: open preamplifier stage: rg 2.2 k , r l 10 k , sw6: a power amplifier stage: rg 600 , r l 32 , sw2: a) characteristics symbol test circuit test condition min typ. max unit i ccq1 pre pw 1.6 3.0 i ccq2 pre: off, sw4: b 1.3 2.4 i ccq3 v cc 3 v, pre pw, sw5: on 3.0 5.5 quiescent supply current i ccq4 v cc 3 v, pre: off, sw4: b, sw5: on 2.7 5.0 ma i cc1 pre pw, 0.1 mw/32
2 ch 4.6 power supply current during drive i cc2 v cc 3 v, pre pw, 0.1 mw/32
2 ch, sw5: on 4.8 ma open loop voltage gain g vo v o 22dbv, nf resistor (240 ) short 65 80 db closed loop voltage gain g vc v o 22dbv 35 db maximum output voltage v om1 thd 1% 160 250 mvrms total harmonic distortion thd1 v cc 1 v, v o 22dbv 0.1 0.3 % equivalent input noise voltage v ni rg 2.2 k , din/audio nab (g v 35 db,f 1 khz), sw6: b 1.5 2.7 vrms cross talk ct1 v o 22dbv 60 db ripple rejection ratio rr1 f r 100 hz, v r 32dbv bpf 100 hz 70 db preamp. stage preamplifier muting attenuation att1 v o 22dbv, sw4: a b 84 db voltage gain g v1 v o 22dbv 23 25 27 db channel balance cb v o 22dbv 1.5 0 1.5 db p o1 v cc 1.5 v, thd 10% 3 6 output power p o2 v cc 3 v, thd 10%, sw5: on 8 12 mw total harmonic distortion thd2 p o 1 mw 0.1 0.5 % output noise voltage v no rg 600 , din/audio, sw2: b 30 60 vrms cross talk ct2 v o 22dbv 34 43 db ripple rejection ratio rr2 v cc 1 v, f r 100 hz, v r 32dbv, bpf 100 hz 80 db power amp. stage power amplifier muting attenuation att2 v o 22dbv, sw3: a b 80 db voltage gain g v2 f 40 hz, v in 64dbv, sw1: b, moni: c-amp - gnd 45 48.5 52 db voltage gain g v3 f 40 hz, v in 47dbv, sw1: b, moni: c-amp ? gnd 31 34.5 38 db maximum output voltage v om2 f 40 hz, thd 1%, sw1: b, moni: c-amp ? gnd 270 mvrms boost stage muting attenuation att3 f 40 hz, v o 32dbv, sw1: b a 58 db ripple filter output voltage v rf out v cc 1 v, i rf 20 ma 0.9 0.93 v .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 12 characteristics symbol test circuit test condition min typ. max unit ripple filter ripple rejection ration rr3 v cc 1 v, i rf 20 ma f r 100 hz, v r 32dbv bpf 100 hz 35 42 db preamplifier on voltage v 13 0 0.3 v preamplifier off current i 13 5 a power amplifier on current i 12 5 a power amplifier off voltage v 12 0 0.3 v boost switch on current i 7 5 a boost switch off voltage v 7 v cc 0.95 v 0 0.3 v .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 13 test circuit 2sa 1362-y in b in a v ref v ref in rf in rf out rf out base lpf bst nf bst out pw in c agc in out a out c out b out b 10 f 1000 pf 180 k 1000 pf 4.7 f 2.2 f 0.22 f 4.7 f 0.1 f 220 k 32 4.7 0.1 f 32 4.7 0.1 f 4.7 0.1 f 22 f out c out a v cc v cc v ref pre out b pre nf b pre nf a pre out a 200 k 0.022 f 33 f 240 12 k 22 k 0.022 f 33 f 240 22 k v ref 12 k 200 k v ref pre gnd bst sw pw in a pw nf a pw nf b pw in b pw mute pre mute pw gnd agc det 22 f v cc 1 f v cc 4.7 f 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 ta2160fn 2.2 k 2.2 k b a1 a2 sw6 4.7 f rg 600 sw5 pre out b 10 k 10 k 1 f pre out a sw1 (a) (b) 1 f 600 rg 600 v ref sw2a (a) (b) 1 f 600 rg 600 v ref sw2b (b) (a) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 (a) (a) (b) (b) sw3 sw4 0.33 f 0.33 f .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 14 application note 1 (1.5 v set) 1 f pre b 2sa 1362-y pre a in b in a v ref v ref in rf in rf out rf out base lpf bst nf bst out pw in c agc in out a out c out b agc det out a 10 f 1000 pf 1000 pf 4.7 f 2.2 f 0.22 f 4.7 f 0.33 f 0.33 f0.1 f 220 k 32 4.7 0.1 f r l 32 4.7 0.1 f r l 4.7 0.1 f 22 f out c out b v cc v cc v ref pre out b pre nf b pre nf a pre out a 200 k 0.022 f 33 f 240 12 k 22 k 0.022 f 33 f 240 22 k v ref 12 k 200 k v ref pre gnd bst sw pw in a pw nf a pw nf b pw in b pw mute pre mute pw gnd agc det 22 f 0.012 f 1.6 k 1.6 k 0.012 f v ref radio in v cc 1 f 1 f 1 f 100 k 2sc1815 2sc1815 1 f v cc 1 f 4.7 f bst pw a pw c pw b 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 bst sw rf&ref 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 mute sw 20 k 20 k 100 k .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 15 application note 2 (3 v set) 1 f pre b 2sa 1362-y pre a in b in a v ref v ref in rf in rf out rf out base lpf bst nf bst out pw in c agc in out a out c out b agc det out a 10 f 1000 pf 1000 pf 4.7 f 2.2 f 0.22 f 4.7 f 0.33 f 0.33 f0.1 f1 m 32 4.7 0.1 f r l 32 4.7 0.1 f r l 4.7 0.1 f 22 f out c out b v cc v cc v ref pre out b pre nf b pre nf a pre out a 200 k 0.022 f 33 f 240 12 k 22 k 0.022 f 33 f 240 22 k v ref 12 k 200 k v ref pre gnd bst sw pw in a pw nf a pw nf b pw in b pw mute pre mute pw gnd agc det 22 f 0.012 f 1.6 k 1.6 k 0.012 f v ref radio in v cc 1 f 1 f 1 f 100 k 2sc1815 2sc1815 1 f v cc 1 f 4.7 f bst pw a pw c pw b 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 bst sw rf&ref 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 mute sw 20 k 20 k 100 k 180 k .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 16 package dimensions weight: 0.17 g (typ.) .com .com .com .com .com 4 .com u datasheet
ta2160fn 2002-03-28 17 toshiba is continually working to improve the quality and reliability of its products. nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. it is the responsibility of the buyer, when utilizing toshiba products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such toshiba products could cause loss of human life, bodily injury or damage to property. in developing your designs, please ensure that toshiba products are used within specified operating ranges as set forth in the most recent toshiba products specifications. also, please keep in mind the precautions and conditions set forth in the ?handling guide for semiconductor devices,? or ?toshiba semiconductor reliability handbook? etc.. the toshiba products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). these toshiba products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (?unintended usage?). unintended usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. unintended usage of toshiba products listed in this document shall be made at the customer?s own risk. the products described in this document are subject to the foreign exchange and foreign trade laws. the information contained herein is presented only as a guide for the applications of our products. no responsibility is assumed by toshiba corporation for any infringements of intellectual property or other rights of the third parties which may result from its use. no license is granted by implication or otherwise under any intellectual property or other rights of toshiba corporation or others. the information contained herein is subject to change without notice. 000707eb a restrictions on product use .com .com .com .com 4 .com u datasheet

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