View X4366ETA-T_7664267.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

general description the max4366/max4367/max4368 are bridged audio power amplifiers intended for devices with internal speakers and headsets. the max4366/max4367/ max4368 are capable of delivering 330mw of continu- ous power into a 32 ? load, or 200mw into a 16 ? load with 1% thd+n from a single 5v supply. the max4366/max4367/max4368 bridged outputs elimi- nate the need for output-coupling capacitors minimizing external component count. the max4366/max4367/ max4368 also feature a low-power shutdown mode, clickless power-up/power-down and internal dc bias generation. the max4366 is a unity-gain stable, program- mable gain amplifier. the max4367/max4368 feature internally preset gains of 2v/v and 3v/v, respectively. all devices are available in space-saving 8-pin sot23, tdfn, and ?ax packages, and an 8-bump chip- scale package (ucsp). applications cellular phones two-way radios pdas headphones headsets general-purpose audio features ? drives 330mw into 32 ? (200mw into 16 ? ) ? 0.02% thd+n at 1khz (120mw into 32 ? ) ? internal bridged configuration ? no output-coupling capacitors ? 2.3v to 5.5v single-supply operation ? 2ma supply current ? low-power shutdown mode ? clickless power-up and shutdown ? thermal overload protection ? available in sot23, tdfn, max, and ucsp packages max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown ________________________________________________________________ maxim integrated products 1 12 b a c ucsp top view (bump side down) 3 bias out- shdn in- out+ in+ gnd v cc max4366 max4367 max4368 pin configurations ordering information v cc v cc out- in- in+ bias audio input clickless/popless shutdowncontrol gnd shdn out+ max4367 max4368 t ypical operating circuit 19-2338; rev 4; 11/05 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. * ep = exposed paddle. + denotes lead-free package. ordering information continued at end of data sheet. selector guide and functional diagrams appear at end of data sheet. pin configurations continued at end of data sheet. ucsp is a trademark and ?ax is a registered trademark of maxim integrated products, inc. part temp range pin/bump- package top mark max4366 ebl-t -40? to +85? 8 ucsp-8 aak max4366eka-t -40? to +85? 8 sot23-8 aaio max4366eua -40? to +85? 8 ?ax maX4366ETA-T -40? to +85? 8 td fn - 8- e p * afz max4366eta+t -40? to +85? 8 td fn - 8- e p * +afz
max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = 5v, r l = , r in = r f = 30k ? , c bias = 1? to gnd, shdn = gnd, in+ = bias, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 3) 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. v cc to gnd ..............................................................-0.3v to +6v in+, in-, bias, shdn to gnd....................-0.3v to (v cc + 0.3v) output short circuit to v cc or gnd (note 1).............continuous output short circuit (out+ to out-) (note 1)...........continuous continuous power dissipation (t a = +70?) 8-bump ucsp (derate 4.7mw/? above +70?)..........379mw 8-pin sot23 (derate 9.7mw/? above +70?).............777mw 8-pin ?ax (derate 4.5mw/? above +70?) ..............362mw 8-pin tdfn (derate 24.4mw? above +70?) ...........1951mw operating temperature range ...........................-40? to +85? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? bump temperature (soldering) (note 2) infrared (15s) ................................................................+220? vapor phase (60s) ........................................................+215? parameter symbol conditions min typ max units supply voltage range v cc inferred from psrr test 2.3 5.5 v supply current i cc (note 4) 2 4.3 ma shutdown supply current i shdn shdn = v cc 35 100 ? v ih 1.8 shdn threshold v il 0.8 v shdn input bias current -400 na common-mode bias voltage v bias (note 5) v cc /2 - 5% v cc /2 v cc /2 + 5% v max4366, r in = ? 5 15 max4367, in- = open 5 15 output offset voltage v os max4368, in- = open ? 7.5 15 mv max4366 (open loop) 100 db max4367 (internally set) 2 differential voltage gain a v (note 6) max4368 (internally set) 3 v/v input common-mode range v cm 0.3 v cc - 1.0 v differential input resistance r in ( diff ) max4366, v in+ - v in- = 10mv 500 k ? input resistance v in - = 0v to v cc (max4367/max4368) 20 k ? t a = +25? 70 80 power-supply rejection ratio psrr v cc = 2.3v to 5.5v t a = t min to t max 66 db common-mode rejection ratio cmrr 0v v cm v cc - 1.0v (max4366) 80 db 2.7v v cc 5.5v, 0.6v v out v cc - 0.6v 87 125 output source/sink current i out (note 7) 2.3v v cc 2.7v, 0.6v v out v cc - 0.6v 115 ma r l = 16 ? 60 200 output power p o f = 1khz, thd+n <1% (note 8) r l = 32 ?
max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown _______________________________________________________________________________________ 3 electrical characteristics (continued) (v cc = 5v, r l = , r in = r f = 30k ? , c bias = 1? to gnd, shdn = gnd, in+ = bias, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?.) (note 3) parameter symbol conditions min typ max units p o = 60mw, r l = 16 ? 0.04 total harmonic distortion plus noise thd+n a v = - 2v /v , f = 1kh z ( m ax 4366) (notes 9 and 10) p o = 120mw, r l = 32 ? 0.02 0.15 % noise f = 10khz, referred to input 20 nv/ hz to v cc 185 short-circuit current i sc to gnd 215 ma thermal shutdown threshold 165 ? thermal shutdown hysteresis 10 ? power-up time t pu 60 ms shutdown time t shdn 20 ms enable time from shutdown t enable 60 ms note 1: continuous power dissipation must also be observed. note 2: this device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during board-level solder attach and rework. this limit permits only the use of the solder profiles recom- mended in the industry-standard specification, jedec 020a, paragraph 7.6, table 3 for ir/vpr and convection reflow. preheating is required. hand or wave soldering is not allowed. note 3: all specifications are 100% tested at t a = +25?; temperature limits are guaranteed by design. note 4: quiescent power-supply current is specified and tested with no load on the outputs. quiescent power-supply current depends on the offset voltage when a practical load is connected to the amplifier. note 5: common-mode bias voltage is the voltage on bias and is nominally v cc /2. note 6: differential voltage gain for the max4366 is specified as an open-loop parameter because external resistors are used to set the closed-loop gain. the max4367/max4368 contain internal feedback resistors that preset the differential voltage gain. differential voltage gain is defined as (v out+ - v out- ) / (v in - v bias ). all gains are specified over an output voltage range of 0.6v v out 4.4v. note 7: specification applies to either output. an amplifier peak output current of 87ma is required to support an output load power of 60mw for a 16 ? load, or 120mw for a 32 ? load. note 8: output power specifications are inferred from the output current test. for 60mw into a 16 ? load, i out(peak) is 87ma and v out(p-p) is 1.39v per amplifier. for 120mw into a 32 ? load, i out(peak) is 87ma and v out(p-p) is 2.77v per amplifier. note 9: guaranteed by design. not production tested. note 10: measurement bandwidth for thd+n is 20hz to 20khz. note 11: power-up and shutdown times are for the output to reach 90% of full scale with c bias = 1?.
max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown 4 _______________________________________________________________________________________ t ypical operating characteristics (bridge-tied load, thd+n bandwidth = 22hz to 22khz, c bias = 1?.) total harmonic distortion plus noise vs. frequency max4366 toc01 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k v cc = 5v a v = 2v/v r l = 16 ? p out = 10mw p out = 60mw p out = 25mw total harmonic distortion plus noise vs. frequency max4366 toc02 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k v cc = 5v a v = 3v/v r l = 16 ? p out = 10mw p out = 60mw p out = 25mw total harmonic distortion plus noise vs. frequency max4366 toc03 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k p out = 10mw p out = 60mw p out = 25mw v cc = 5v a v = 4v/v r l = 16 ? max4366 toc04 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k p out = 10mw p out = 60mw p out = 25mw v cc = 5v a v = 20v/v r l = 16 ? total harmonic distortion plus noise vs. frequency max4366 toc05 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k p out = 75mw p out = 120mw p out = 50mw v cc = 5v a v = 2v/v r l = 32 ? total harmonic distortion plus noise vs. frequency max4366 toc06 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k p out = 75mw p out = 120mw p out = 50mw v cc = 5v a v = 3v/v r l = 32 ? total harmonic distortion plus noise vs. frequency max4366 toc07 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k p out = 75mw p out = 120mw p out = 50mw v cc = 5v a v = 4v/v r l = 32 ? total harmonic distortion plus noise vs. frequency max4366 toc08 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k p out = 75mw v cc = 5v a v = 20v/v r l = 32 ? p out = 120mw p out = 50mw total harmonic distortion plus noise vs. frequency max4366 toc09 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k p out = 25mw p out = 10mw p out = 60mw v cc = 3v a v = 2v/v r l = 16 ? total harmonic distortion plus noise vs. frequency
max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown _______________________________________________________________________________________ 5 max4366 toc10 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k p out = 25mw p out = 10mw p out = 60mw v cc = 3v a v = 3v/v r l = 16 ? total harmonic distortion plus noise vs. frequency max4366 toc11 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k v cc = 3v a v = 4v/v r l = 16 ? p out = 60mw p out = 10mw p out = 25mw total harmonic distortion plus noise vs. frequency max4366 toc12 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k p out = 60mw v cc = 3v a v = 20v/v r l = 16 ? p out = 10mw p out = 25mw total harmonic distortion plus noise vs. frequency max4366 toc13 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k v cc = 3v a v = 2v/v r l = 32 ? p out = 10mw p out = 50mw p out = 25mw total harmonic distortion plus noise vs. frequency max4366 toc14 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k v cc = 3v a v = 3v/v r l = 32 ? p out = 10mw p out = 50mw p out = 25mw total harmonic distortion plus noise vs. frequency max4366 toc15 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k v cc = 3v a v = 4v/v r l = 32 ? p out = 10mw p out = 50mw p out = 25mw total harmonic distortion plus noise vs. frequency max4366 toc16 frequency (hz) thd+n (%) 10k 1k 100 0.01 0.1 1 0.001 10 100k v cc = 3v a v = 20v/v r l = 32 ? p out = 10mw p out = 50mw p out = 25mw total harmonic distortion plus noise vs. frequency max4366 toc17 output power (mw) thd+n (%) 300 200 100 0.01 0.1 1 10 100 0.001 0 400 v cc = 5v a v = 2v/v r l = 16 ? f = 10khz f = 1khz total harmonic distortion plus noise vs. output power max4366 toc18 output power (mw) thd+n (%) 300 200 100 0.01 0.1 1 10 100 0.001 0 400 v cc = 5v a v = 4v/v r l = 16 ? f = 10khz f = 1khz total harmonic distortion plus noise vs. output power t ypical operating characteristics (continued) (bridge-tied load, thd+n bandwidth = 22hz to 22khz, c bias = 1?.)
max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown 6 _______________________________________________________________________________________ t ypical operating characteristics (continued) (bridge-tied load, thd+n bandwidth = 22hz to 22khz, c bias = 1?.) total harmonic distortion plus noise vs. output power max4366 toc19 output power (mw) thd+n (%) 300 200 100 0.01 0.1 1 10 100 0.001 0 400 v cc = 5v a v = 2v/v r l = 32 ? f = 10khz f = 1khz max4366 toc20 output power (mw) thd+n (%) 300 200 100 0.01 0.1 1 10 100 0.001 0 400 v cc = 5v a v = 4v/v r l = 32 ? f = 10khz f = 1khz total harmonic distortion plus noise vs. output power max4366 toc21 output power (mw) thd+n (%) 225 150 75 0.01 0.1 1 10 100 0.001 0 300 f = 10khz f = 1khz total harmonic distortion plus noise vs. output power v cc = 3v a v = 2v/v r l = 16 ? max4366 toc22 output power (mw) thd+n (%) 225 150 75 0.01 0.1 1 10 100 0.001 0 300 v cc = 3v a v = 4v/v r l = 16 ? f = 10khz f = 1khz total harmonic distortion plus noise vs. output power max4366 toc23 output power (mw) thd+n (%) 225 150 75 0.01 0.1 1 10 100 0.001 0 300 f = 10khz f = 1khz total harmonic distortion plus noise vs. output power v cc = 3v a v = 2v/v r l = 32 ? max4366 toc24 output power (mw) thd+n (%) 225 150 75 0.01 0.1 1 10 100 0.001 0 300 v cc = 3v a v = 4v/v r l = 32 ? f = 10khz f = 1khz total harmonic distortion plus noise vs. output power output power vs. supply voltage max4366 toc25 supply voltage (v) output power (mw) 5.0 4.5 4.0 3.5 3.0 100 200 300 400 500 0 2.5 5.5 thd+n = 10% thd+n = 1% r l = 32 ? output power vs. supply voltage max4366 toc26 supply voltage (v) output power (mw) 5.0 4.5 4.0 3.5 3.0 100 200 400 300 500 600 0 2.5 5.5 thd+n = 10% thd+n = 1% r l = 16 ?
max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown _______________________________________________________________________________________ 7 output power vs. load max4366 toc28 load resistance ( ? ) output power (mw) 1k 100 10 10k 50 100 150 200 250 0 thd+n = 10% a v = 20v/v thd+n = 1% a v = 2v/v v cc = 3v f = 1khz power dissipation vs. output power max4366 toc29 output power (mw) power dissipation (mw) 150 100 50 100 200 300 400 500 0 0 200 r l = 16 ? v cc = 5v a v = 2v/v r l = 32 ? power dissipation vs. output power max4366 toc30 output power (mw) power dissipation (mw) 50 100 150 200 0 80 60 40 20 0 100 r l = 32 ? r l = 16 ? v cc = 3v a v = 2v/v power dissipation vs. output power max4366 toc31 output power (mw) power dissipation (mw) 50 100 150 200 0 40 30 20 10 050 v cc = 5v a v = 2v/v single ended r l = 16 ? r l = 32 ? gain and phase vs. frequency max4366 toc32 frequency (hz) gain (db)/phase (deg) 10m 1m 100k 10k 1k -160 -140 -120 -100 -80 -60 -40 -20 0 20 40 60 80 -180 100 100m v cc = 5v a v = 1000v/v single ended no load gain phase t ypical operating characteristics (continued) (bridge-tied load, thd+n bandwidth = 22hz to 22khz, c bias = 1?.) output power vs. load max4366 toc27 load resistance ( ? ) output power (mw) 1k 100 50 100 150 200 250 300 350 400 450 0 10 10k thd+n = 10% a v = 20v/v thd+n = 1% a v = 2v/v v cc = 5v f = 1khz
max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown 8 _______________________________________________________________________________________ t ypical operating characteristics (continued) (bridge-tied load, thd+n bandwidth = 22hz to 22khz, c bias = 1?.) differential power-supply rejection ratio vs. frequency max4366 toc33 frequency (hz) psrr (db) 100k 10k 1k 100 10 1m -70 -50 -30 -10 0 -80 v cc = 3v v cc = 5v -20 -40 -60 supply current vs. supply voltage max4366 toc34 supply voltage (v) supply current (ma) 5 4 3 2 1 0.5 1.0 1.5 2.0 2.5 0 0 supply current vs. temperature max4366 toc35 temperature ( c) supply current (ma) 60 35 10 -15 0.5 1.0 1.5 2.0 2.5 3.0 0 -40 85 v cc = 5v v cc = 3v max4366 toc36 supply voltage (v) shutdown supply current ( a) 5 4 3 2 1 5 10 15 20 25 30 35 40 45 0 0 shutdown supply current vs. supply voltage max4366 toc37 temperature ( c) supply current ( a) 60 35 10 -15 5 10 15 20 25 30 35 40 45 50 0 -40 85 shutdown supply current vs. temperature v cc = 5v v cc = 3v
max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown _______________________________________________________________________________________ 9 pin description pin/bump sot23/ max tdfn ucsp name function 11 c3 shdn active-high shutdown. connect shdn to gnd for normal operation. 22 c1 bias dc bias bypass. see bias capacitor section for capacitor selection. connect c bias capacitor from bias to gnd. 33 a3 in+ noninverting input 44 a1 in- inverting input 55 a2 out+ bridged amplifier positive output 66b3 v cc power supply 77 b1 gnd ground 88 c2 out- bridged amplifier negative output ? p ep exposed paddle. connect exposed pad to gnd. detailed description the max4366/max4367/max4368 bridged audio power amplifiers can deliver 330mw into a 32 ? load, or 200mw into a 16 ? load, while operating from a single 5v supply. these devices consist of two high-output- current op amps configured as a bridge-tied load (btl) amplifier (see functional diagram ). the closed-loop gain of the input op amp sets the single-ended gain of the device. two external resistors set the gain of the max4366 (see gain-setting resistors section). the max4367/max4368 feature internally fixed gains of 2v/v and 3v/v, respectively. the output of the first amplifier serves as the input to the second amplifier, which is configured as an inverting unity-gain follower in all three devices. this results in two outputs, identical in magnitude, but 180 out of phase. bias the max4366/max4367/max4368 feature an internally generated common-mode bias voltage of v cc /2 refer- enced to gnd. bias provides both click-and-pop sup- pression and the dc bias level for the audio signal. bias is internally connected to the noninverting input of one amplifier, and should be connected to the nonin- verting input of the other amplifier for proper signal biasing ( typical application circuit ). choose the value of the bypass capacitor as described in the bias capacitor section. shutdown the max4366/max4367/max4368 feature a 35?, low- power shutdown mode that reduces quiescent current consumption and extends battery life. pulling shdn high disables the device? bias circuitry and drives out+, out-, and bias to gnd. connect shdn to gnd for normal operation. applications information bridge-tied load the max4366/max4367/max4368 are designed to drive a load differentially, a configuration referred to as bridge-tied load (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 volt- age compared to a single-ended amplifier under similar conditions. the differential gain of the device is twice the closed-loop gain of the input amplifier. the effective gain of the max4366 is given by: a r r vd f in = 2 +1 r l out+ 2 x out out- -1 figure 1. bridge-tied load configuration
max4366/max4367/max4368 the effective gains of the max4367 and max4368 are a vd = 2v/v and a vd = 3v/v respectively. substituting 2 x v out(p-p) for v out(p-p) into the following 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. single-ended configuration the max4366/max4367/max4368 can be used as sin- gle-ended amplifiers (figure 2). the gain of the device in single-ended mode is 1/2 the gain in btl configura- tion and the output power is reduced by a factor of 4. the single-ended gains of the max4367 and max4368 are 1v/v and 1.5v/v, respectively. set the max4366 gain according to the gain-setting resistors section. in single-ended mode, the load must be capacitively coupled to the device output to block the half-supply dc voltage from the load (see output coupling capacitor section). leave the unused output floating. power dissipation under normal operating conditions, linear power ampli- fiers like the max4366/max4367/max4368 can dissi- pate 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? and t a is the reciprocal of the derating factor in ?/w as specified in the absolute p tt diss max j max a ja () () = - v v p v r rms out p p out rms l = = ? () 22 2 330mw, ultra-small, audio power amplifiers with shutdown 10 ______________________________________________________________________________________ out+ out- 8 5 c out r l max4367 figure 2. max4367 single-ended configuration v cc v cc c in r in r f c bias 6 out- in+ bias audio input 3 2 clickless/ popless shutdown control gnd shdn 8 out+ 5 7 1 max4366 50k ? 50k ? 10k ? 10k ? in- 4 figure 3. max4366 typical application circuit
maximum ratings section. for example, ja of a ?ax package is 222?/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. if the power dissipation exceeds the maximum allowed for a given package, either reduce v cc , increase load impedance, decrease the ambient temperature, or add heat sinking to the device. large output, supply, and ground traces improve the maximum power dissipation in the package. thermal overload protection limits total power dissipa- tion in the max4366/max4367/max4368. when the junction temperature exceeds +165?, the thermal pro- tection circuitry disables the amplifier output stage. the amplifiers are re-enabled once the junction temperature cools by +10?. this results in a pulsing output under continuous thermal overload conditions avoiding dam- age to the port. component selection gain-setting resistors external feedback components set the gain of the max4366. resistors r f and r in (figure 3) set the gain of the input amplifier as follows: the gain of the device in a single-ended configuration is half the gain of the btl case. choose r f between 10k ? and 50k ? . the gains of the max4367/max4368 are set internally (figure 4). 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: f rc db in in -3 1 2 = a r r vd f in = ? ? ? ? ? ? 2 max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown ______________________________________________________________________________________ 11 figure 4. max4367/max4368 typical application circuit v cc v cc c in r in r f c bias 6 out- in+ bias audio input 3 2 clickless/ popless shutdown control gnd shdn 8 out+ 5 7 1 max4367 max4368 50k ? 50k ? 10k ? 10k ? in- 4 max4367: r in = r f = 20k ? max4368: r in = 20k ?, r f = 30k ? pin numbers refer to sot23, tdfn, and max packages
max4366/max4367/max4368 choose r in according to the gain-setting resistors section. choose the c in such that f -3db is well below the lowest frequency of interest. setting f -3db too high affects the low-frequency response of the system. other considerations when designing the input filter include the constraints of the overall system, the actual frequency band of interest and click-and-pop suppres- sion. although high-fidelity audio calls for a flat-gain response between 20hz and 20khz, portable voice- reproduction devices such as cellular phones and two- way radios need only concentrate on the frequency range of the spoken human voice (typically 300hz to 3.5khz). in addition, speakers used in portable devices typically have a poor response below 150hz. taking these two factors into consideration, the input filter may not need to be designed for a 20hz to 20khz response, saving both board space and cost due to the use of smaller capacitors. bias capacitor t he bias bypass capacitor, c bias improves power- supply rejection ratio and thd+n by reducing power- supply noise at the common-mode bias node, and serves as the primary click-and-pop suppression mechanism. c bias is fed from an internal 25k ? source, and controls the rate at which the common-mode bias voltage rises at startup and falls during shutdown. for optimum click-and-pop suppression, ensure that the input capacitor (c in ) is fully charged (ten time con- stants) before c bias . the value of c bias for best click- and-pop suppression is given by: in addition, a larger c bias value yields higher psrr, especially in single-ended applications. output-coupling capacitor the max4366/max4367/max4368 require output-cou- pling capacitors only when configured as a single- ended amplifier. the output capacitor blocks the dc component of the amplifier output, preventing dc cur- rent flowing to the load. the output capacitor and the load impedance form a highpass filter with the -3db point determined by: as with the input capacitor, choose the output capacitor (c out ) such that f -3db is well below the lowest frequen- cy of interest. setting f -3db too high affects the low- frequency response of the system. in addition to click-and-pop suppression and frequency band considerations, the load impedance is another concern when choosing c out . load impedance can vary, changing the -3db point of the output filter. a lower impedance increases the corner frequency, degrading low-frequency response. select c out such that the worst-case load/c out combination yields an adequate response. clickless/popless operation proper selection of ac-coupling capacitors and c bias achieves clickless/popless shutdown and startup. the value of c bias determines the rate at which the mid-rail bias voltage rises on startup and falls when entering shutdown. the size of the input capacitor also affects clickless/popless operation. on startup, c in is charged to its quiescent dc voltage through the feedback resis- tor (r f ) from the output. this current creates a voltage transient at the amplifier? output, which can result in an audible pop. minimizing the size of c in reduces this effect, improving click-and-pop suppression. supply bypassing proper supply bypassing ensures low-noise, low-distor- tion performance. place a 0.1? ceramic capacitor in par- allel with a 10? capacitor from v cc to gnd. locate the bypass capacitors as close to the device as possible. headphone applications the max4366/max4368 can drive a mono headphone when configured as a single-ended amplifier. typical 2- wire headphone plugs consist of a tip and sleeve. the tip is the signal carrier while the sleeve is the ground con- nection (figure 5). figure 6 shows the device configured to drive headphones. out+ is connected to the tip, delivering the signal to the headphone, while out- remains unconnected. f rc db l out -3 1 2 = c cr k bias in in ? ? ? ? ? ? ? 10 25 330mw, ultra-small, audio power amplifiers with shutdown 12 ______________________________________________________________________________________ figure 5. typical 2-wire headphone plug tip (signal) sleeve (gnd)
wireless-phone headset application many wireless telephones feature an earbud speaker/in- line microphone combination for hands-free use. one common solution is to use a btl amplifier that drives the internal speaker and an earplug jack that mutes the inter- nal speaker by physically disconnecting out- when a headset is plugged in (figure 7). the headset is driven single-endedly, requiring an output-coupling capacitor, c out , and resulting in a 4x reduction in output power. adding volume control the addition of a digital potentiometer provides simple volume control. figure 8 shows the max4367/max4368 with the max5160 digital potentiometer used as an input attenuator. connect the high terminal of the max5160 to the audio input, the low terminal to ground and the wiper to c in . setting the wiper to the top posi- tion passes the audio signal unattenuated. setting the wiper to the lowest position fully attenuates the input. use the 100k ? version of the max5160. layout considerations good layout improves performance by decreasing the amount of stray capacitance and noise at the amplifi- er? inputs and outputs. decrease stray capacitance by minimizing pc board trace lengths, using surface- mount components and placing external components as close to the device as possible. ucsp considerations for general ucsp information and pc layout considera- tions, please refer to the maxim application note: ucsp? wafer-level chip-scale package. max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown ______________________________________________________________________________________ 13 out+ headphone jack out- 8 5 c out max4366 max4367 max4368 figure 6. max4367 headphone application circuit earbud speaker jack internal loudspeaker c out out+ out- max4366 max4367 max4368 figure 7. headset with internal speaker application circuit out+ audio input out- in- 3h w5 4 5 8 c in 6l max4367 max4368 max5160 figure 8. max4367/max5160 volume control circuit
ordering information (continued) part temp range pin/bump- package top mark max4367 ebl-t -40? to +85? 8 ucsp-8 aal max4367eka-t -40? to +85? 8 sot23-8 aaip max4367eua -40? to +85? 8 ?ax max4367eta-t -40? to +85? 8 td fn - 8- e p * aga max4367eta+t -40? to +85? 8 td fn - 8- e p * +aga max4368 ebl-t -40? to +85? 8 ucsp-8 aam max4368eka-t -40? to +85? 8 sot23-8 aaiq max4368eua -40? to +85? 8 ?ax max4368eta-t -40? to +85? 8 td fn - 8- e p * agb max4368eta+t -40? to +85? 8 td fn - 8- e p * +agb max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown 14 ______________________________________________________________________________________ v cc out+ in- 1 2 8 7 out- gnd *exposed pad. connect to gnd. bias in+ shdn sot23/ max top view 3 4 6 5 max4366 max4367 max4368 v cc out+ in- 1 2 out- gnd bias in+ shdn tdfn (3mm x 3mm x 0.8mm) 3 4 max4366 max4367 max4368 8 76 5 pin configurations (continued) part gain max4366 external max4367 2v/v max4368 3v/v selector guide * ep = exposed paddle. + denotes lead-free package.
max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown ______________________________________________________________________________________ 15 v cc out- in+ bias clickless/ popless shutdown control gnd shdn out+ max4366 50k ? 50k ? 10k ? 10k ? in- v cc out- in+ bias clickless/ popless shutdown control gnd shdn out+ max4367 max4368 50k ? 50k ? 10k ? 10k ? in- *r f = 30k ? (max4368) r f = 20k ? (max4367) r f * 20k ? chip information transistor count: 669 process: bipolar functional diagrams
max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown 16 ______________________________________________________________________________________ sot23, 8l .eps rev. document control no. approval proprietary information title: 3.00 2.60 e c e1 e between 0.08mm and 0.15mm from lead tip. 8. meets jedec mo178. 8 0.60 1.75 0.30 l2 0 e1 e l 1.50 e1 0.65 bsc. 1.95 ref. 0.25 bsc. gauge plane seating plane c c l pin 1 i.d. dot (see note 6) l c l c a2 e1 d detail "a" 5. coplanarity 4 mils. max. note: 7. solder thickness measured at flat section of lead 6. pin 1 i.d. dot is 0.3 mm ? min. located above pin 1. 4. package outline inclusive of solder plating. 3. package outline exclusive of mold flash & metal burr. heel of the lead parallel to seating plane c. 2. foot length measured from lead tip to upper radius of 1. all dimensions are in millimeters. l2 l a1 a 0.45 1.30 0.15 1.45 max 0.28 b 0.90 a2 0.00 a1 0.90 a min symbol 3.00 0.20 2.80 d 0.09 c see detail "a" l c b e d 1 21-0078 1 package outline, sot-23, 8l body 0 0 8lumaxd.eps package outline, 8l umax/usop 1 1 21-0036 j rev. document control no. approval proprietary information title: max 0.043 0.006 0.014 0.120 0.120 0.198 0.026 0.007 0.037 0.0207 bsc 0.0256 bsc a2 a1 c e b a l front view side view e h 0.60.1 0.60.1 ?0.500.1 1 top view d 8 a2 0.030 bottom view 1 6 s b l h e d e c 0 0.010 0.116 0.116 0.188 0.016 0.005 8 4x s inches - a1 a min 0.002 0.95 0.75 0.5250 bsc 0.25 0.36 2.95 3.05 2.95 3.05 4.78 0.41 0.65 bsc 5.03 0.66 6 0 0.13 0.18 max min millimeters - 1.10 0.05 0.15 dim package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .)
max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown ______________________________________________________________________________________ 17 6, 8, &10l, dfn thin.eps l c l c pin 1 index area d e l e l a e e2 n g 1 2 21-0137 package outline, 6,8,10 & 14l, tdfn, exposed pad, 3x3x0.80 mm -drawing not to scale- k e [(n/2)-1] x e ref. pin 1 id 0.35x0.35 detail a b d2 a2 a1 common dimensions symbol min. max. a 0.70 0.80 d 2.90 3.10 e 2.90 3.10 a1 0.00 0.05 l 0.20 0.40 pkg. code n d2 e2 e jedec spec b [(n/2)-1] x e package variations 0.25 min. k a2 0.20 ref. 2.300.10 1.500.10 6 t633-1 0.95 bsc mo229 / weea 1.90 ref 0.400.05 1.95 ref 0.300.05 0.65 bsc 2.300.10 8 t833-1 2.00 ref 0.250.05 0.50 bsc 2.300.10 10 t1033-1 2.40 ref 0.200.05 - - - - 0.40 bsc 1.700.10 2.300.10 14 t1433-1 1.500.10 1.500.10 mo229 / weec mo229 / weed-3 0.40 bsc - - - - 0.200.05 2.40 ref t1433-2 14 2.300.10 1.700.10 t633-2 6 1.500.10 2.300.10 0.95 bsc mo229 / weea 0.400.05 1.90 ref t833-2 8 1.500.10 2.300.10 0.65 bsc mo229 / weec 0.300.05 1.95 ref t833-3 8 1.500.10 2.300.10 0.65 bsc mo229 / weec 0.300.05 1.95 ref -drawing not to scale- g 2 2 21-0137 package outline, 6,8,10 & 14l, tdfn, exposed pad, 3x3x0.80 mm downbonds allowed no no no no yes no yes no package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) note: max4366/max4367/max4368 package code: t833-1
max4366/max4367/max4368 330mw, ultra-small, audio power amplifiers with shutdown 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. 18 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2005 maxim integrated products printed usa is a registered trademark of maxim integrated products, inc. 9lucsp, 3x3.eps package outline, 3x3 ucsp 21-0093 1 1 j note: bump b2 is not present. package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .)

▲Up To Search▲

Price & Availability of X4366ETA-T

	To Download X4366ETA-T Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .