View MAX9710ETP-T_5242162.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

general description the max9710/max9711 are stereo/mono 3w bridge-tied load (btl) audio power amplifiers. these devices are pc99/01 compliant, operate from a single 4.5v to 5.5v supply, and feature an industry-leading 100db psrr, which allows these devices to operate from noisy sup- plies without additional, costly power-supply condition- ing. an ultra-low 0.005% thd+n ensures clean, low-distortion amplification of the audio signal while patented click-and-pop suppression eliminates audible transients on power and shutdown cycles. power-saving features include low 2mv v os (minimizing dc current drain through the speakers), low 7ma supply current, and a 0.5? shutdown mode. a mute function allows the outputs to be quickly enabled or disabled. these devices include thermal overload protection, are specified over the extended -40? to +85? tempera- ture range, and are supplied in thermally efficient pack- ages. the max9710 is available in a 20-pin thin qfn package (5mm ? 5mm ? 0.8mm). the max9711 is available in a 12-pin thin qfn package (4mm ? 4mm ? 0.8mm). applications features ? 3w into 3 (1% thd+n) ? 4w into 3 (10% thd+n) ? industry-leading, ultra-high 100db psrr ? pc99/01 compliant ? patented click-and-pop suppression ? low 0.005% thd+n ? low quiescent current: 7ma ? low-power shutdown mode: 0.5? ? mute function ? tiny 20-pin thin qfn (5mm ? 5mm ? 0.8mm) max9710/max9711 3w mono/stereo btl audio power amplifiers with shutdown ________________________________________________________________ maxim integrated products 1 ordering information 19-2841; rev 1; 6/08 evaluation kit available part temp range pin-package amp max9710 etp -40? to +85? 20-thin qfn-ep* stereo max9711 etc -40? to +85? 12-thin qfn-ep* mono max9710 tqfn 1 inl 2 bias 3 n.c. 4 mute 5 inr 6 pgnd 7 outr+ 8 pv dd 9 outr- 10 n.c. 11 pgnd 12 v dd 13 n.c. 14 15 pgnd 16 n.c. 17 outl- 18 pv dd 19 outl+ 20 pgnd shdn top view single supply 4.5v to 5.5v max9710 left in right in pin configurations simplified block diagram * ep = exposed pad. notebook pcs flat-panel tvs flat-panel pc displays two-way radios general-purpose audio powered speakers pin configurations continued at end of data sheet. for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com.
max9710/max9711 3w mono/stereo btl audio power amplifiers with shutdown 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v dd = pv dd = 5.0v, v gnd = v pgnd = v mute = 0v, v shdn = 5v, r in = r f = 15k , r l = . t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. note 1: all devices are 100% production tested at +25?. all temperature limits are guaranteed by design. note 2: pssr is specified with the amplifier inputs connected to gnd through r in and c in . v dd to gnd, pgnd ...............................................................+6v pv dd to v dd .......................................................................?.3v pgnd to gnd.....................................................................?.3v all other pins to gnd.................................-0.3v to (v dd + 0.3v) continuous input current (into any pin except power supply and output pins).........................?0ma continuous power dissipation (t a = +70?) 12-pin thin qfn (derate 16.9mw/? above +70?) ....1349mw 20-pin thin qfn (derate 20.8mw/? above +70?) ....1667mw operating temperature range............................-40c to +85c storage temperature range .............................-65c to +150c junction temperature ......................................................+150c lead temperature (soldering, 10s) .................................+300c parameter symbol conditions min typ max units supply voltage range v dd /pv dd inferred from psrr test 4.5 5.5 v max9710 12 30 quiescent supply current (i vdd + i pvdd ) i dd max9711 7 17 ma shutdown supply current i shdn shdn = gnd 0.5 30 ? c bias = 1? (10% of final value) 300 turn-on time t on c bias = 0.1? (10% of final value) 30 ms thermal shutdown threshold 160 ? thermal shutdown hysteresis 15 ? output amplifiers output offset voltage v os v out_+ - v out_- , a v = 2 2 14 mv v dd = 4.5v to 5.5v 82 100 f = 1khz 87 power-supply rejection ratio psrr v ripple = 200mv p-p (note 2) f = 20khz 74 db r l = 8 1.1 1.4 r l = 4 2.6 output power p out f in = 1khz, thd+n < 1% r l = 3 3 w p out = 1.2w, r l = 8 0.005 total harmonic distortion plus noise thd+n f in = 1khz, bw = 22hz to 22khz p out = 2w, 4 0.01 % signal-to-noise ratio snr r l = 8 , v ou t = 2.8v rm s , bw = 22h z to 22kh z95 db slew rate sr 1.6 v/? maximum capacitive load drive c l no sustained oscillations 1 nf crosstalk f in = 10khz 77 db bias voltage (bias) bias voltage v bias 2.35 2.5 2.65 v output resistance r bias 50 k digital inputs (mute, shdn ) input voltage high v ih 2v input voltage low v il 0.8 v input leakage current i in 1a
max9710/max9711 3w mono/stereo btl audio power amplifiers with shutdown _______________________________________________________________________________________ 3 total harmonic distortion plus noise vs. frequency max9710/11 toc01 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k r l = 3 a v = -2v/v p out = 500mw p out = 2.5w total harmonic distortion plus noise vs. frequency max9710/11 toc02 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k r l = 3 a v = -4v/v p out = 500mw p out = 2.5w total harmonic distortion plus noise vs. frequency max9710/11 toc03 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k r l = 4 a v = -2v/v p out = 250mw p out = 2w total harmonic distortion plus noise vs. frequency max9710/11 toc04 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k r l = 4 a v = -4v/v p out = 250mw p out = 2w total harmonic distortion plus noise vs. frequency max9710/11 toc05 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k r l = 8 a v = -2v/v p out = 250mw p out = 1.2w total harmonic distortion plus noise vs. frequency max9710/11 toc06 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k r l = 8 a v = -4v/v p out = 250mw p out = 1.2w total harmonic distortion plus noise vs. output power max9710/11 toc07 output power (w) thd+n (%) 3 2 1 0.01 0.1 1 10 100 0.001 04 a v = -2v/v r l = 3 f = 20hz f = 10khz f = 1khz total harmonic distortion plus noise vs. output power max9710/11 toc08 output power (w) thd+n (%) 3 2 1 0.01 0.1 1 10 100 0.001 04 a v = -4v/v r l = 3 f = 20hz f = 10khz f = 1khz total harmonic distortion plus noise vs. output power max9710/11 toc09 output power (w) thd+n (%) 2.5 3.0 1.5 2.0 1.0 0.5 0.01 0.1 1 10 100 0.001 0 3.5 a v = -2v/v r l = 4 f = 20hz f = 10khz f = 1khz typical operating characteristics (v dd = 5v, thd+n measurement bandwidth = 22hz to 22khz, t a = +25?, unless otherwise noted.)
max9710/max9711 3w mono/stereo btl audio power amplifiers with shutdown 4 _______________________________________________________________________________________ total harmonic distortion plus noise vs. output power max9710/11 toc10 output power (w) thd+n (%) 2.5 3.0 1.5 2.0 1.0 0.5 0.01 0.1 1 10 100 0.001 0 3.5 a v = -4v/v r l = 4 f = 20hz f = 10khz f = 1khz total harmonic distortion plus noise vs. output power max9710/11 toc11 output power (w) thd+n (%) 1.5 2.0 1.0 0.5 0.01 0.1 1 10 100 0.001 0 a v = -2v/v r l = 8 f = 20hz f = 10khz f = 1khz total harmonic distortion plus noise vs. output power max9710/11 toc12 output power (w) thd+n (%) 1.5 2.0 1.0 0.5 0.01 0.1 1 10 100 0.001 0 a v = -4v/v r l = 8 f = 20hz f = 10khz f = 1khz output power vs. temperature max9710/11 toc13 temperature ( c) output power (w) 60 35 10 -15 1 2 3 4 0 -40 85 thd+n = 10% thd+n = 1% f = 1khz r l = 3 output power vs. temperature max9710/11 toc14 temperature ( c) output power (w) 60 35 10 -15 1 2 3 4 0 -40 85 thd+n = 10% thd+n = 1% f = 1khz r l = 4 output power vs. temperature max9710/11 toc15 temperature ( c) output power (w) 60 35 10 -15 0.5 1.0 1.5 2.0 0 -40 85 thd+n = 10% thd+n = 1% f = 1khz r l = 8 output power vs. load resistance (forced-air cooling) max9710/11 toc16 load resistance ( ) output power (w) 100 10 1 2 3 4 5 0 1 1000 thd+n = 10% thd+n = 1% v dd = 5v f = 1khz power dissipation vs. output power max9710/11 toc17 output power (w) power dissipation (w) 2.0 1.5 0.5 1.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0 0 2.5 r l = 4 f = 1khz power dissipation vs. output power max9710/11 toc18 output power (w) power dissipation (w) 1.00 0.75 0.25 0.50 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0 1.50 1.25 r l = 8 f = 1khz typical operating characteristics (continued) (v dd = 5v, thd+n measurement bandwidth = 22hz to 22khz, t a = +25?, unless otherwise noted.)
max9710/max9711 3w mono/stereo btl audio power amplifiers with shutdown _______________________________________________________________________________________ 5 power-supply rejection ratio vs. frequency max9710/11 toc19 frequency (hz) psrr (db) 10k 1k 100 -80 -60 -40 -20 0 -100 10 100k v ripple = 200mv p-p crosstalk vs. frequency max9710/11 toc20 frequency (hz) crosstalk (db) 10 1 0.1 -100 -80 -60 -40 -20 0 -120 0.01 100 right to left left to right v in = 200mv p-p r l = 8 entering shutdown max9710/11 toc21 r l = 8 input ac-coupled to gnd 100ms/div out_+ and out_- out_+ - out_- shdn 2v/div 1v/div 200mv/div exiting shutdown max9710/11 toc22 r l = 8 input ac-coupled to gnd 100ms/div out_+ and out_- out_+ - out_- shdn 2v/div 1v/div 200mv/div entering power-down max9710/11 toc23 r l = 8 input ac-coupled to gnd 100ms/div out_+ and out_- out_+ - out_- v dd 2v/div 1v/div 200mv/div exiting power-down max9710/11 toc24 r l = 8 input ac-coupled to gnd 100ms/div out_+ and out_- out_+ - out_- v dd 2v/div 1v/div 200mv/div typical operating characteristics (continued) (v dd = 5v, thd+n measurement bandwidth = 22hz to 22khz, t a = +25?, unless otherwise noted.)
max9710/max9711 3w mono/stereo btl audio power amplifiers with shutdown 6 _______________________________________________________________________________________ pin description max9710 supply current vs. supply voltage max9710/11 toc25 supply voltage (v) supply current (ma) 5.25 5.00 4.75 2 4 6 8 10 12 14 16 18 0 4.50 5.50 t a = +85 c t a = +25 c t a = -40 c typical operating characteristics (continued) (v dd = 5v, thd+n measurement bandwidth = 22hz to 22khz, t a = +25?, unless otherwise noted.) max9711 supply current vs. supply voltage max9710/11 toc26 supply voltage (v) supply current (ma) 5.25 5.00 4.75 2 4 6 8 10 12 0 4.50 5.50 t a = +85 c t a = +25 c t a = -40 c shutdown supply current vs. supply voltage max9710/11 toc27 supply voltage (v) supply current ( a) 5.25 5.00 4.75 0.2 0.4 0.6 0.8 1.0 0 4.50 5.50 t a = +85 c t a = +25 c t a = -40 c pin max9710 max9711 name function 1 inl left-channel input 2 7 bias dc bias bypass. see bias capacitor section for capacitor selection. 3, 10, 13, 16 n.c. no connection. not internally connected. 4 9 mute active-high mute input 5 inr right-channel input 6, 11, 15, 20 1, 3 pgnd power ground 7 outr+ right-channel bridged amplifier positive output 8, 18 5, 11 pv dd output amplifier power supply 9 outr- right-channel bridged amplifier negative output 12 8 v dd power supply 14 10 shdn active-low shutdown. connect shdn to v dd for normal operation. 17 outl- left-channel bridged amplifier negative output 19 outl+ left-channel bridged amplifier positive output 2 in amplifier input 6 gnd ground 12 out- bridged amplifier negative output 4 out+ bridged amplifier positive output ep exposed pad. connect to ground plane.
detailed description the max9710/max9711 are 3w btl speaker ampli- fiers. the max9710 is a stereo speaker amplifier, while the max9711 is a mono speaker amplifier. both devices feature a low-power shutdown mode, mute mode, and comprehensive click-and-pop suppression. these devices consist of high output-current op amps configured as btl amplifiers (see functional diagrams ). the device gain is set by r f and r in . bias these devices operate from a single 5v supply and feature an internally generated, power-supply-indepen- dent, common-mode bias voltage of 2.5v referenced to ground. bias provides both click-and-pop suppression and sets the dc bias level for the audio outputs. bias is internally connected to the noninverting input of each speaker amplifier (see functional diagrams ). choose the value of the bypass capacitor as described in the bias capacitor section. no external load should be applied to bias. any load lowers the bias voltage, affecting the overall performance of the device. shutdown the max9710/max9711 feature a 0.5? low-power shut- down mode that reduces quiescent current consump- tion. pulling shdn low disables the device? bias circuitry, the amplifier outputs are actively pulled low, and bias is driven to gnd. connect shdn to v dd for normal operation. mute both devices feature a clickless/popless mute mode. when the device is muted, the input disconnects from the amplifier. mute only affects the power amplifiers and does not shut down the device. drive mute high to mute the device. drive mute low for normal operation. click-and-pop suppression the max9710/max9711 feature maxim? patented com- prehensive click-and-pop suppression. during startup, the common-mode bias voltage of the amplifiers slowly ramps to the dc bias point using an s-shaped wave- form. when entering shutdown, the amplifier outputs are actively driven low simultaneously. this scheme mini- mizes the energy present in the audio band. for optimum click-and-pop suppression, choose: r in x c in < r bias x c bias where r bias = 50k . applications information btl amplifier the max9710/max9711 are designed to drive a load differentially, a configuration referred to as btl. the btl configuration (figure 1) offers advantages over the single-ended configuration, where one side of the load is connected to ground. driving the load differentially doubles the output voltage compared to a single- ended amplifier under similar conditions. thus, the dif- ferential gain of the device is twice the closed-loop gain of the input amplifier. the effective gain is given by: substituting 2 x v out(p-p) for v out(p-p) into the follow- ing equations yields four times the output power due to doubling of the output voltage: since the differential outputs are biased at midsupply, there is no net dc voltage across the load. this elimi- nates the need for dc-blocking capacitors required for single-ended amplifiers. these capacitors can be large, expensive, consume board space, and degrade low-frequency performance. p v r out rms l = 2 v v rms out p p = ? () 22 a r r vd f in = 2 max9710/max9711 3w mono/stereo btl audio power amplifiers with shutdown _______________________________________________________________________________________ 7 +1 v out(p-p) 2 x v out(p-p) v out(p-p) -1 figure 1. bridge-tied load configuration
max9710/max9711 power dissipation and heat sinking under normal operating conditions, the max9710/ max9711 dissipate a significant amount of power. the maximum power dissipation for each package is given in the absolute maximum ratings section under continuous power dissipation or can be calculated by the following equation: where t j(max ) is +150?, t a is the ambient temperature, and ja is the reciprocal of the derating factor in ?/w as specified in the absolute maximum ratings section. for example, ja of the 20-pin thin qfn package is 48.1?/w. the increase in power delivered by the btl configura- tion directly results in an increase in internal power dis- sipation over the single-ended configuration. the maximum power dissipation for a given v dd and load is given by the following equation: if the power dissipation for a given application exceeds the maximum allowed for a given package, either reduce v dd , increase load impedance, decrease the ambient temperature, or add heat sinking to the device (see layout and grounding section). large output, supply, and ground pc board traces improve the maximum power dissipation in the package. thermal-overload protection limits total power dissipa- tion in the max9710/max9711. when the junction temperature exceeds +160?, the thermal protection circuitry disables the amplifier output stage. the amplifiers are enabled once the junction temperature cools by 15?. a pulsing output under continuous thermal-overload conditions results as the device heats and cools. component selection gain-setting resistors external feedback components set the gain of both devices. resistors r f and r in ( functional diagrams ) set the gain of the amplifier as follows: input filter the input capacitor (c in ), in conjunction with r in , forms a highpass filter that removes the dc bias from an incoming signal. the ac-coupling capacitor allows the amplifier to bias the signal to an optimum dc level. assuming zero-source impedance, the -3db point of the highpass filter is given by: for optimum click-and-pop suppression, choose: r in x c in < r bias x c bias where r bias = 50k . setting f -3db too high affects the low-frequency response of the amplifier. use capacitors with dielectrics that have low-voltage coefficients, such as tantalum or aluminum electrolytic. capacitors with high- voltage coefficients, such as ceramics, may result in an increase of distortion at low frequencies. bias capacitor bias is the output of the internally generated 2.5vdc bias voltage. the bias bypass capacitor, c bias , improves psrr and thd+n by reducing power supply and other noise sources at the common-mode bias node, and also generates the clickless/popless startup dc bias waveform for the speaker amplifiers. bypass bias with a 1? capacitor to gnd. smaller values of c bias produce faster t on /t off times but may result in increased click/pop levels. supply bypassing proper power-supply bypassing ensures low-noise, low-distortion performance. place a 0.1? ceramic capacitor from v dd to pgnd. add additional bulk capacitance as required by the application. locate the bypass capacitor as close to the device as possible. piezoelectric speaker driver low-profile piezoelectric speakers can provide quality sound for portable electronics. however, piezoelectric speakers typically require large voltage swings (>8v p-p ) across the speaker element to produce audible sound pressure levels. the max9711 can be configured to drive a piezoelectric speaker with up to 10v p-p while operating from a single 5v supply. figure 2 shows the thd+n of the max9711 driving a piezoelectric speaker. note that as frequency increas- es, the thd+n increases. this is due to the capacitive nature of the piezoelectric speaker; as frequency increases, the speaker impedance decreases, resulting in a larger current draw from the amplifier. f rc db in in ? = 3 1 2 a r r vd f in = 2 p v r diss max dd l () = 2 2 2 p tt disspkg max j max a ja () () = ? 3w mono/stereo btl audio power amplifiers with shutdown 8 _______________________________________________________________________________________
the capacitive nature of the piezoelectric speaker may cause the max9711 to become unstable. a simple induc- tor/resistor network in series with the speaker isolates the speaker capacitance from the driver and ensures that the device output sees a resistive load of about 10 at high frequency, thereby maintaining stability (figure 3). layout and grounding good pc board layout is essential for optimizing perfor- mance. use large traces for the power-supply inputs and amplifier outputs to minimize losses due to parasitic trace resistance and route heat away from the device. good grounding improves audio performance, minimizes crosstalk between channels, and prevents any digital switching noise from coupling into the audio signal. the max9710/max9711 thin qfn package features an exposed thermal pad on the underside. this pad low- ers the thermal resistance of the package by providing a direct-heat conduction path from the die to the print- ed circuit board. connect the exposed pad to the ground plane using multiple vias, if required. for opti- mum performance, connect to the ground planes as shown in figure 4. max9710/max9711 3w mono/stereo btl audio power amplifiers with shutdown _______________________________________________________________________________________ 9 total harmonic distorti0n plus noise vs. frequency frequency (hz) thd+n (%) 10 1 0.1 0.01 0.1 1 10 0.001 0.01 100 v out = 8v p-p figure 2. max9711 piezoelectric speaker driver thd+n vs. frequency max9711 in out+ out- 2 4 12 * piezoelectric speaker. * audio input 1 f 15k 15k 10 100 h figure 3. isolation network for driving a piezoelectric speaker max9710 pgnd pv dd audio signal gnd v dd 5v for optimum performance, audio gnd should have a star connection to the high current, amplifier pgnd at a single point, pin 6. figure 4. max9710 audio ground connection
max9710/max9711 3w mono/stereo btl audio power amplifiers with shutdown 10 ______________________________________________________________________________________ max9710 bias left audio input c in 0.1 f r in 15k 1 12 2 6, 11, 15, 20 2,18 inl v dd pv dd bias 4 5 mute inr 14 pgnd 4.5v to 5.5v supply c bias 1 f 0.1 f shdn right audio input c in 0.1 f r in 15k r f 15k r f 15k 10k 10k 19 17 9 pin numbers shown are for the 20 tqfn-ep package. 7 outl+ outl- outr- outr+ 10k 10k functional diagrams
max9710/max9711 3w mono/stereo btl audio power amplifiers with shutdown ______________________________________________________________________________________ 11 bias left audio input c in 0.1 f r in 15k 2 8 7 in v dd pv dd bias 9 mute 10 5,11 4.5v to 5.5v supply c bias 1 f r f 15k 10k 10k 4 12 out+ out- shdn gnd pgnd 6 1, 3 max9711 0.1 f functional diagrams (continued) 12 out- 11 pv dd 10 45 pv dd 6 gnd 1 2 in 3 9 8 7 pgnd mute v dd bias max9711 pgnd out+ qfn shdn top view pin configurations (continued)
max9710/max9711 3w mono/stereo btl audio power amplifiers with shutdown 12 ______________________________________________________________________________________ chip information max9710 transistor count: 1172 max9711 transistor count: 780 process: bicmos max9710 max961 outr+ outr- outl- outl+ inr inl bias pv dd mute v dd shdn 15k 15k 100k 100k v cc 15k 15k v dd (5v) v cc (3.3v) 0.1 f 0.1 f 0.1 f 1 f max4060 max4411 q q in+ 0.1 f v dd /2 outl outr c1p cin pv ss sv ss shdnl shdnr 1 f 1 f 1 f inl inr aux_in bias in+ in- 2.2k 0.1 f 0.1 f 0.1 f codec out 1 f 1 f v cc in- 1 f system diagram package information for the latest package outline information and land patterns, go to www.maxim-ic.com/packages . package type package code document no. 20 tqfn-ep t2055-4 21-0140 12 tqfn-ep t1244-4 21-0139
max9710/max9711 3w mono/stereo btl audio power amplifiers with shutdown revision history revision number revision date description pages changed 0 4/03 initial release 1 6/08 removed tssop package 1, 2, 6, 9, 10 maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ____________________ 13 2008 maxim integrated products is a registered trademark of maxim integrated products, inc.

▲Up To Search▲

Price & Availability of MAX9710ETP-T

	To Download MAX9710ETP-T Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .