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general description the max4335?ax4338 op amps deliver 40mw perchannel into 32 from ultra-small sc70/sot23 pack- ages making them ideal for mono/stereo headphonedrivers in portable applications. these amplifiers have a 5mhz gain-bandwidth product and are guaranteed to deliver 50ma of output current while operating from a single supply of 2.7v to 5.5v. the max4336 and the max4338 have a shutdown/mute mode that reduces the supply current to 0.04? per amplifier and places the outputs in a high-impedance state. the max4335?ax4338 have 90db power-supply rejection ratio (psrr), eliminating the need for costly pre-regulation in most audio applications. both the input voltage range and the output voltage swing include both supply rails, maximizing dynamic range. the max4335/max4336 single amplifiers are available in ultra-small 6-pin sc70 packages. the max4337/ max4338 dual amplifiers are available in an 8-pin sot23 and a 10-pin ?ax package, respectively. all devices are specified from -40? to +85?. ________________________applications 32 headphone drivers portable/battery-powered instrumentswireless pa control hands-free car phones transformer/line drivers dac/adc buffers features ? 50ma output drive capability ? low 0.003% thd (20khz into 10k ) ? rail-to-rail inputs and outputs ? 2.7v to 5.5v single-supply operation ? 5mhz gain-bandwidth product ? 95db large-signal voltage gain ? 90db power-supply rejection ratio ? no phase reversal for overdrive inputs ? ultra-low power shutdown/mute mode reduces supply current to 0.04a places output in high-impedance state ? thermal overload protection max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute ________________________________________________________________ maxim integrated products 1 19-2136; rev 1; 9/01 ordering information pin configurations appear at end of data sheet. rail-to-rail is a registered trademark of nippon motorola ltd. 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. part temp range pin-package top mark max4335 ext-t -40 c to +85 c 6 sc70-6 aax max4336 ext-t -40 c to +85 c 6 sc70-6 aaw max4337 eka-t -40 c to +85 c 8 sot23-8 aaik max4337eua -40 c to +85 c 8 ?ax max4338 eub -40 c to +85 c 10 ?ax typical operating circuit v cc r2 c2 c1 v in 32 r4 r1 c3 r3 max4335max4336 10 100 10k 1k 100k total harmonic distortion plus noise vs. frequency frequency (hz) thd + noise (%) 0.0050.004 0.002 0.003 r l = 10k , v cc = 5v v out = 2v p-p downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute 2 _______________________________________________________________________________________ absolute maximum ratings stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. supply voltage (v cc to gnd) ..................................-0.3v to +6v all other pins to gnd ....................(gnd - 0.3v) to (v cc + 0.3v) output short-circuit duration to v cc or gnd ............continuous continuous power dissipation (t a = +70 c) 6-pin sc70 (derate 3.1mw/ c above +70 c) ...............245mw 8-pin sot23 (derate 9.1mw/ c above +70 c).............727mw 8-pin ?ax (derate 4.5mw/ c above +70 c) ..............362mw 10-pin ?ax (derate 5.6mw/ c above +70 c) .............444mw operating temperature range ...........................-40 c to +85 c junction temperature ......................................................+150 c storage temperature range .............................-65 c to +150 c lead temperature (soldering, 10s) .................................+300 c dc electrical characteristics(v cc = 2.7v, gnd = 0, v cm = 0, v out = v cc /2, r l = to v cc /2, v shdn = v cc, t a = +25 c , unless otherwise noted.) parameter symbol conditions min typ max units operating supply voltage range v cc inferred from psrr test 2.7 5.5 v v cc = 5.5v 1.3 1.8 quiescent supply current (peramplifier) i cc v cc = 2.7 1.2 ma input offset voltage v os v cm = gnd to v cc ?.6 ? mv input bias current i b v cm = gnd to v cc ?00 ?00 na input offset current i os v cm = gnd to v cc ? ?0 na |v in- - v in+ | < 1.2v 500 differential input resistance r in(diff) | vin- - v in+ | > 1.2v 8.4 k input common-mode voltagerange v cm inferred from cmrr test gnd v cc v common-mode rejection ratio cmrr v cm = gnd to v cc 60 80 db power-supply rejection ratio psrr v cc = 2.7v to 5.5v 70 90 db output resistance r out av cl = 1v/v 0.05 v cc = 5v: r l = 10k v out = 0.4v to 4.6v 95 v cc = 5v: r l = 100 v out = 0.5v to 4.5v 70 84 large-signal voltage gain a vol v cc = 2.7v: r l = 32 v out = 0.5v to 2.2v 62 72 db v cc - v oh 100 v cc = 2.7v; r l = 10k v ol 100 v cc - v oh 220 400 v cc = 2.7v; r l = 32 v ol 280 400 v cc - v oh 100 v cc = 5v; r l = 10k v ol 100 v cc - v oh 190 350 output voltage swing v out v cc = 5v; r l = 100 v ol 240 350 mv downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute _______________________________________________________________________________________ 3 dc electrical characteristics (continued)(v cc = 2.7v, gnd = 0, v cm = 0, v out = v cc /2, r l = to v cc /2, v shdn = v cc, t a = +25 c , unless otherwise noted.) dc electrical characteristics (v cc = 2.7v, gnd = 0, v cm = 0, v out = v cc /2, r l = to v cc /2, v shdn = v cc, t a = -40 c to +85 c , unless otherwise noted.) (note 1) parameter symbol conditions min typ max units v cc - v oh 270 500 v cc = 2.7v; i source , i sink = 50ma v ol 360 500 v cc - v oh 270 500 output drive i out v cc = 5v; i source , i sink = 50ma v ol 360 500 mv short-circuit current i sc 110 ma v ih normal mode 0.7 x v cc shdn logic levels v il shutdown mode 0.3 x v cc v shdn leakage current i il v cc = 5v, gnd < v shdn < v cc 0.5 ? output leakage current inshutdown i out ( shdn ) v cc = 5v, v shdn = 0, v out = 0, v cc 0.01 0.5 ? shutdown supply current(per amplifier) i cc ( shdn ) shdn = gnd; v cc = 5v <0.04 0.5 ? parameter symbol conditions min typ max units operating supply voltage range v cc inferred from psrr test 2.7 5.5 v quiescent supply current (peramplifier) i cc v cc = 5.5v 2.25 ma input offset voltage v os v cm = gnd to v cc ? mv input bias current i b v cm = gnd to v cc ?00 na input offset current i os v cm = gnd to v cc ?0 na input common-mode voltagerange v cm inferred from cmrr test gnd v cc v common-mode rejection ratio cmrr v cm = gnd to v cc 50 db power-supply rejection ratio psrr v cc = 2.7v to 5.5v 64 db v cc = 5v: r l = 100 , v out = 0.6v to 4.4v 66 large-signal voltage gain a vol v cc = 2.7v: r l = 32 , v out = 0.6v to 2.1v 56 db downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute 4 _______________________________________________________________________________________ dc electrical characteristics (continued) (v cc = 2.7v, gnd = 0, v cm = 0, v out = v cc /2, r l = to v cc /2, v shdn = v cc, t a = -40 c to +85 c , unless otherwise noted.) (note 1) ac electrical characteristics(v cc = 2.7v, gnd = 0, v cm = v cc /2, v out = v cc /2, v shdn = v cc, a vcl = 1v/v, c l = 15pf, r l = to v cc /2 , t a = +25 c , unless otherwise noted.) parameter symbol conditions min typ max units gain-bandwidth product gbwp 5 mhz full-power bandwidth fbwp v out = 2v p-p , v cc = 5v 280 khz slew rate sr 1.8 v/? phase margin pm 70 degrees gain margin gm 18 db f = 1khz 0.005 v cc = 5v, r l = 100 , v out = 2v p-p f = 10khz 0.02 v cc = 5v, r l = 10k , v out = 2v p-p , f = 10khz 0.003 f = 1khz 0.01 total harmonic distortion thd v cc = 2.7v; r l = 32 , v out = 2v p-p f = 10khz 0.03 % parameter symbol conditions min typ max units v cc - v oh 500 v cc = 2.7v; r l = 32 v ol 500 v cc - v oh 400 output voltage swing v out v cc = 5v; r l = 100 v ol 400 mv v cc - v oh 650 v cc = 2.7v; i source , i sink = 50ma v ol 650 v cc - v oh 650 output drive i out v cc = 5v; i source , i sink = 50ma v ol 650 mv v ih normal mode 0.7 x v cc shdn logic level v il shutdown mode 0.3 x v cc v shdn leakage current i il v cc = 5v, gnd < v shdn < v cc 1 a output leakage current inshutdown i out ( shdn ) v cc = 5v, v shdn = 0, v out = 0; v cc 1 a shutdown supply current(per amplifier) i cc ( shdn ) v shdn = 0; v cc = 5v 1 a downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute _______________________________________________________________________________________ 5 ac electrical characteristics (continued) (v cc = +2.7v, gnd = 0, v cm = v cc /2, v out = v cc /2, v s hdn = v cc, a vcl = 1v/v, c l = 15pf, r l = to v cc /2, t a = +25 c , unless otherwise noted.) note 1: all devices are 100% production tested at t a = +25 c. all limits over temperature are guaranteed by design. parameter symbol conditions min typ max units settling time to 0.01% t s 2v step 2 s crosstalk ct v out = 2v p-p ; f = 1khz 100 db input capacitance c in 5p f f = 10khz 26 input voltage-noise density e n f = 1khz nv/ hz f = 10khz 0.6 input current-noise density i n f = 1khz pa/ hz capacitive-load stability no sustained oscillation 200 pf shutdown time t shdn 1 s enable time from shutdown t enable 1 s power-up time t on 5 s __________________________________________typical operating characteristics (v cc = 2.7v, gnd = 0, v cm = 0, v out = v cc /2, r l = to v cc /2, v s hdn = v cc, t a = +25 c, unless otherwise noted.) 1.41.3 1.2 1.1 1.0 -40 10 -15 35 60 85 max4335-8 toc01 temperature ( c) supply current (ma) v cc = 5.5v v cc = 2.7v supply current per amplifier vs. temperature 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 -40 -15 10 35 60 85 max4335-8 toc02 temperature ( c) minimum operating voltage (v) minimum operating voltage vs. temperature 0 300200 100 400 500 600 700 800 900 1000 max4335-8 toc03 temperature ( c) supply current (pa) shutdown supply current vs. temperature -40 -15 10 35 60 85 v cc = 5.5v v cc = 2.7v downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute 6 _______________________________________________________________________________________ -200 -100-150 0 -50 50 100 02 3 1 456 input bias current vs. common-mode voltage max4335 toc05 common-mode voltage (v) input bias current (na) v cc = 2.7v v cc = 5.5v -1.0 -0.4-0.6 -0.8 -0.2 0 0.2 0.4 0.6 0.8 1.0 max4335 - 8 toc04 temperature ( c) input offset voltage (mv) input offset voltage vs. temperature -40 -15 10 35 60 85 sc70 max -250 -150-200 0 -50 -100 150100 50 200 max4335-8 toc06 temperature ( c) -40 -15 10 35 60 85 input bias current (na) input bias current vs. temperature v cm = v cc v cc = 5.5v v cm = 0 v cc = 2.7v v cm = v cc v cc = 2.7v v cm = 0 v cc = 5.5v 80 81 8382 84 85 max4335-8 toc07 temperature ( c) -40 -15 10 35 60 85 cmrr (db) common-mode rejection ratio vs. temperature 0 50 150100 200 250 0 1.6 output current vs. output voltage (sinking) max4335 toc10 output voltage (v) output current (ma) 0.8 0.4 1.2 v cc = 5.5v v cc = 2.7v 0 100 50 200150 300250 350 max4335-8 toc09 output high voltage (mv) output high voltage vs. temperature temperature ( c) -40 -15 10 35 60 85 v cc = 5.5v r l = 100 v cc = 2.7v r l = 100 v cc = 2.7v r l = 100 v cc = 5.5v r l = 100 80 120 160 200 240 280 320 360 400 440 480 max4335-8 toc08 output low voltage (mv) temperature ( c) -40 -15 10 35 60 85 output low voltage vs. temperature v cc = 5.5v r l = 100 v cc = 2.7v r l = 100 v cc = 2.7v r l = 100 v cc = 5.5v r l = 100 0 50 150100 200 250 max4335 toc11 output voltage ( v ) output current (ma) 0 1.6 output current vs. output voltage (sourcing) 0.4 0.6 0.2 0.8 1.0 1.2 1.4 v cc = 5.5v v cc = 2.7v 55 7565 9585 115105 0 0.2 0.1 0.3 0.4 0.5 large-signal gain vs. output voltage (sinking, v cc = 5.5v) max4335 toc12 output voltage (v) large-signal gain (db) r l referenced to v cc r l = 100k r l = 1k r l = 100 typical operating characteristics (continued) (v cc = 2.7v, gnd = 0, v cm = 0, v out = v cc /2, r l = to v cc /2, v s hdn = v cc, t a = +25 c, unless otherwise noted.) downloaded from: http:///
max4335-8 toc19 frequency (hz) psrr (db) 100 1k 10k 100k 1m 10m -110 -90 -70 -30-50 -10 10 -100 -80 -60 -20-40 0 power-supply rejection ratio vs. frequency 100 0.01 1k 10k 1m 10m output impedance vs. frequency 0.1 1 10 max4335-8 toc20 frequency (hz) output impedance ( ) 100k a v = 1 0.0400.035 0.030 0.025 0.020 0.015 0.010 0.005 0 10 1k 10k 100 100k total harmonic distortion and noise vs. frequency max4335/8 toc21 frequency (hz) thd + noise (%) v cc = 5v v out = 2v p-p 500khz lowpass filterr l = 10k to v cc /2 max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute _______________________________________________________________________________________ 7 50 7060 9080 110100 120 large-signal gain vs. output voltage (sourcing, v cc = 5.5v) max4335 toc13 output voltage (v) large-signal gain (db) 0.1 0.2 0.3 0.4 0.5 r l referenced to v cc /2 r l = 100k r l = 1k r l = 100 35 55 65 75 85 95 105 115 0.1 0.2 0.3 0.4 0.5 large-signal gain vs. output voltage (sinking, v cc = 2.7v) max4335 toc14 output voltage (v) large-signal gain (db) 45 r l referenced to v cc r l = 100k r l = 1k r l = 100 40 50 7060 90 100 80 110 0.05 0.25 0.35 0.15 0.45 0.55 0.65 0.75 large-signal gain vs. output voltage (sourcing, v cc = 2.7v) max4335 toc15 output voltage (v) large-signal gain (db) r l = 100k r l = 1k r l = 100 r l = 32 r l referenced to v cc /2 50 7060 9080 100 110 -40 10 -15 35 60 85 large-signal gain vs. temperature max4335 toc16 temperature ( c) large-signal gain (db) v cc = 2.7v r l = 100k v cc = 5v r l = 100 v cc = 2.7v r l = 32 70 -30 100 1k 10k 100k 1m 10m -10 frequency ( hz ) gain (db) phase (degrees) 10 30 50 -20 0 20 40 60 max4335-8 toc17 gain and phase vs. frequency a vcl = 1000v/v 216 -144 72 108 180144 36 0 -108 -36-72 70 -30 100 1k 10k 100k 1m 10m -10 fre qu en c y ( hz ) gain (db) phase (degrees) 10 30 50 -20 0 20 40 60 max4335-8 toc18 gain and phase vs. frequency (c l = 200pf) a vcl = 1000v/v 216 -144 72 108 180144 36 0 -108 -36-72 typical operating characteristics (continued) (v cc = 2.7v, gnd = 0, v cm = 0, v out = v cc /2, r l = to v cc /2, v s hdn = v cc, t a = +25 c, unless otherwise noted.) downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute 8 _______________________________________________________________________________________ -60 -110 10 1k 100 100k 10m channel-to-channel isolation vs. frequency -80-90 -100 -70 max4335/8 toc23 frequency (hz) channel-to-channel isolation 10k 1m small-signal transient response (noninverting) max4335 toc24 in 20mv/div out 20mv/div 200ns/div large-signal transient response (noninverting) max4335 toc26 in 2v/div out 2v/div 2 s/div v cc = 5v small-signal transient response (inverting) max4335 toc25 in 20mv/div out 20mv/div 200ns/div large-signal transient response (inverting) max4335 toc27 in 2v/div out 2v/div 2 s/div v cc = 5v 10 0.001 3.0 4.0 3.5 5.0 5.5 total harmonic distortion plus noise vs. peak-to-peak output voltage 0.01 0.1 1 max4335 toc22 peak-to-peak output voltage (v) thd + noise (%) 4.5 frequency = 10khz r l = 100 r l = 1k r l = 100k ____________________________typical operating characteristics (continued) (v cc = 2.7v, gnd = 0, v cm = 0, v out = v cc /2, r l = to v cc /2, v s hdn = v cc, t a = +25 c, unless otherwise noted.) downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute _______________________________________________________________________________________ 9 pin description pin max4337 max4335 max4336 sot23 ?ax max4338 name function 1 1 3, 5 3, 5 3, 7 in1 + , in2 + noninverting input 2 2 4 4 4 gnd ground 3 3 2, 6 2, 6 2, 8 in2 - , in2 - inverting input 4 4 1, 7 1, 7 1, 9 out1, out2 output(s) 5 n.c. no connection. not internally connected. 5 5, 6 shdn1 , shdn2 drive shdn low for shutdown. drive shdn high or connect to v cc for normal operation. 6 6 8 8 10 v cc positive supply typical application circuit mute r input v ref l input max4338 downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute 10 ______________________________________________________________________________________ applications information package power dissipation warning: due to the high-output-current drive, this opamp can exceed the absolute maximum power-dissi- pation rating. as a general rule, as long as the peak cur- rent is less than or equal to 50ma, the maximum packagepower dissipation will not be exceeded for any of the package types offered. there are some exceptions to this rule, however. the absolute maximum power-dissipation rating of each package should always be verified using the following equations. the following equation gives an approximation of the package power dissipation: where: v rms = the rms voltage from v cc to v out when sourcing current = the rms voltage from v out to v ee when sinking current i rms = the rms current flowing out of or into the op amp and the load = the phase difference between the voltage and the current. for resistive loads, cos = 1. for example, the circuit in figure 1 has a packagepower dissipation of 220mw. therefore, p ic(diss) = v rms i rms cos = 220mw adding a coupling capacitor improves the packagepower dissipation because there is no dc current to the load, as shown in figure 2. therefore, p ic(diss) = v rms i rms cos = 45mw the absolute maximum power-dissipation rating of thepackage may be exceeded if the configuration in figure 1 is used with the max4335/max4336 amplifiers at a high ambient temperature of 79 c (220.6mw/ c plus a derating of 3.1mw/ c x 9 c = 247.9mw). note that the 247.9mw just exceeds the absolute maximumpower dissipation of 245mw for the 6-pin sc70 package. v v v i + i 2 rms cc dc rms peak ?? () ? =? ?= ?= + = . . . / v vv v v ia v ma peak rms dc rms 2 55 275 1 2 2 043 0 132 2 22 v v v i + i 2 rms cc dc rms peak ?? () ? =? ?= ?= + = . . . . / v vv v v i vv ma peak rms dc rms 2 55 275 1 2 2 043 275 32 132 2 108 p v i cos ic diss rms rms () ? 5.5v v in = 2v p-p r c 32 r max4335max4336 figure 1. a circuit example where the max4335/max4336 isdissipating high power 5.5v v in = 2v p-p r 32 r c in c c c c > 1 2 r l f l where f l is the low-frequency cutoff max4335max4336 figure 2. a circuit example where adding a couplingcapacitor greatly reduces the power dissipation of its package downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute ______________________________________________________________________________________ 11 single-supply speaker driver the max4335/max4336 can be used as a single-sup-ply speaker driver, as shown in the typical operating circuit . capacitor c1 is used for blocking dc (a 0.1? ceramic capacitor can be used). when choosing resis-tors r3 and r4, take into consideration the input bias current as well as how much supply current can be tol- erated. choose resistors r1 and r2 according to the amount of gain and current desired. capacitor c3 ensures unity gain for dc. a 10? electrolytic capacitor is suitable for most applications. the coupling capaci- tor c2 sets a low-frequency pole and is fairly large in value. for a 32 load, a 100? coupling capacitor gives a low-frequency pole at 50hz. the low-frequencypole can be set according to the following equation: ? = 1 / 2 (r l c2) rail-to-rail input stage devices in the max4335 max4338 family of high- output-current amplifiers have rail-to-rail input and outputstages designed for low-voltage, single-supply opera- tion. the input stage consists of separate npn and pnp differential stages that combine to provide an input common-mode range that extends 0.25v beyond the supply rails. the pnp stage is active for input volt- ages close to the negative rail, and the npn stage is active for input voltages near the positive rail. the switchover transition region, which occurs near v cc /2, has been extended to minimize the slight degradationin common-mode rejection ratio caused by mismatch of the input pairs. since the input stage switches between the npn and pnp pairs, the input bias current changes polarity as the input voltage passes through the transition region. match the effective impedance seen by each input to reduce the offset error caused by input bias currents flowing through external source impedances (figures 3 and 5). high source impedances, together with input capaci- tance, can create a parasitic pole that produces an underdamped signal response. reducing the input impedance or placing a small (2pf to 10pf) capacitor across the feedback resistor improves response. the max4335 max4338 s inputs are protected from large differential input voltages by 1k series resistors and back-to-back double diodes across the inputs (figure 5). for differential voltages less than 1.2v, input resistance is typically 500k . for differential input voltages greater than 1.2v, input resistance is approximately 8.4k . the input bias current is given by the following equation: i bias = (v diff - 1.2v) / 8.4k rail-to-rail output stage the minimum output is within millivolts of ground forsingle-supply operation, where the load is referenced to ground (gnd). figure 6 shows the input voltage range and the output voltage swing of a max4335 con- nected as a voltage follower. the maximum output volt- age swing is load dependent; however, it is guaranteed to be within 400mv of the positive rail (v cc = 2.7v) even with maximum load (32 to v cc /2). driving capacitive loads the max4335 max4338 have a high tolerance for capacitive loads. they are stable with capacitive loadsup to 200pf. figure 7 is a graph of the stable operating region for various capacitive loads vs. resistive loads. r3 r3 = r1 r2 r1 r2 max4335?ax4338 figure 3. reducing offset error due to bias current(noninverting) r3 r3 = r1 r2 r1 r2 max4335?ax4338 figure 4. reducing offset error due to bias current (inverting) downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute 12 ______________________________________________________________________________________ figures 8 and 9 show the transient response withexcessive capacitive loads (330pf), with and without the addition of an isolation resistor in series with the output. figure 10 shows a typical noninverting capaci- tive-load-driving circuit in the unity-gain configuration. the resistor improves the circuit s phase margin by iso- lating the load capacitor from the op amp s output. power-up and shutdown/mute modes the max4336/max4338 have a shutdown option.when the shutdown pin ( shdn ) is pulled low, supply current drops to 0.04? per amplifier (v cc = 5v), the amplifiers are disabled, and their outputs are placed ina high-impedance state. pulling shdn high enables the amplifier. in the dual max4338, the two amplifiersshut down independently. figure 11 shows the max4336 s output voltage response to a shutdown pulse. the max4335 max4338 typically settle within 5? after power-up (figure 12). power supplies and layout the max4335 max4338 can operate from a single 2.7v to 5.5v supply. bypass the power supply with a0.1? ceramic capacitor in parallel with at least 1?. good layout improves performance by decreasing the amount of stray capacitance at the op amps inputs and outputs. decrease stray capacitance by placingexternal components close to the op amps input/output pins, minimizing trace and lead lengths. thermal overload protection the max4335 max4338 includes thermal overload protection circuitry. when the junction temperature ofthe device exceeds +140 c, the supply current drops to 120? per amplifier (v cc = 5v) and the outputs are placed in a high-impedance state. the device returnsto normal operation when the junction temperature falls to below +120 c. short-circuit current protection the max4335 max4338 incorporate a smart short-cir- cuit protection feature. figure 7 shows the output volt-age region where the protection circuitry is active. a fault condition occurs when i out > 110ma and v out > 1v (sinking current) or when i out > 110ma and (v cc - v out ) > 1v (sourcing current). when a fault is detect- ed, the short-circuit protection circuitry is activated andthe output current is limited to 110ma, protecting the device and the application circuitry. when the smart short circuit is not active, the output current can safely exceed 110ma (see the output current vs. output voltage graph in the typical operating characteristics ). 4.2k 4.2k figure 5. input protection circuit downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute ______________________________________________________________________________________ 13 in (1v/div) out (1v/div) figure 6. rail-to-rail input/output range v out v cc v cc - 1v 1v 0 in source mode, short-circuit protection circuitry is not activated for (v cc - v out ) < 1v. output current can safely exceed 110ma.in sink mode, short-circuit protection circuitry is not activated for v out < 1v. output current can safely exceed 110ma. short-circuit protection circuitry limits output current to 110ma figure 7. short-circuit protection 1300 0 10 100k 100 200 300 400 1100 1200 max4335-fig07 resistive load ( ) capacitive load (pf) 100 1k 10k 1000 900800 700 600 500 stable region v cc = 5.0v r l to v cc /2 unstable region figure 8. capacitive-load stability in (20mv/div) out (20mv/div) max4335-fig08 1 s/div v cc = 3.0v, c l = 330pf r l = 100k , r iso = 0 figure 9. small-signal transient response with excessivecapacitive load downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute 14 ______________________________________________________________________________________ shdn 1v/div out 1v/div max4335-fig11 5 s/div figure 12. shutdown output voltage enable/disable v cc 1v/div out 2v/div max4335-fig12 5 s/div figure 13. power-up/down output voltage in (20mv/div) out (20mv/div) 1 s/div v cc = 3.0v, c l = 330pf r l = 100k , r iso = 39 figure 10. small-signal transient response with excessivecapacitive load with isolation resistor r iso c l max4336 figure 11. capacitive-load-driving circuit downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute ______________________________________________________________________________________ 15 ___________________chip information max4335 transistor count: 1200max4336 transistor count: 1200 max4337 transistor count: 2400 max4338 transistor count: 2400 process: bicmos pin configurations top view in2- in2+ gnd 12 8 7 v cc out2 in1- in1+ out1 sot23/ max 3 4 6 5 max4337 1 23 4 5 10 98 7 6 v cc out2in2- in2+ gnd in1+ in1- out1 max4338 max shdn2 shdn1 gnd ( ) max4335 only out in - 16 v cc 5 shdn (n.c.) in + max4335max4336 sc70 234 downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute 16 ______________________________________________________________________________________ sot23, 8l.eps 8lumaxd.eps package outline, 8l umax/usop 1 1 21-0036 j rev. document control no. approval proprietary information title: max 0.0430.006 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 0.0100.116 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 5.030.66 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 information, go to www.maxim-ic.com/packages .) downloaded from: http:///
max4335?ax4338 sc70/sot23-8, 50ma i out , rail-to-rail i/o op amps with shutdown/mute maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit 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 ____________________ 17 2001 maxim integrated products printed usa is a registered trademark of maxim integrated products. 10lumax.eps package outline, 10l umax/usop 1 1 21-0061 i rev. document control no. approval proprietary information title: top view front view 1 0.498 ref 0.0196 ref s 6 side view bottom view 0 0 6 0.037 ref 0.0078 max0.006 0.0430.118 0.1200.199 0.0275 0.118 0.0106 0.120 0.0197 bsc inches 1 10 l1 0.0035 0.007 e c b 0.187 0.0157 0.114 hl e2 dim 0.116 0.114 0.116 0.002 d2e1 a1d1 min - a 0.940 ref 0.500 bsc 0.090 0.177 4.75 2.89 0.40 0.200 0.270 5.05 0.70 3.00 millimeters 0.052.89 2.952.95 - min 3.003.05 0.153.05 max 1.10 10 0.60.1 0.60.1 ? 0.500.1 h 4x s e d2 d1 b a2 a e2 e1 l l1 c gage plane a2 0.030 0.037 0.75 0.95 a1 package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline information, go to www.maxim-ic.com/packages .) downloaded from: http:///

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