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general description the max4230Cmax4234 single/dual/quad, high-output drive cmos op amps feature 200ma of peak output cur - rent, rail-to-rail input, and output capability from a single 2.7v to 5.5v supply. these amplifiers exhibit a high slew rate of 10v/s and a gain-bandwidth product (gbwp) of 10mhz. the max4230Cmax4234 can drive typical head - set levels (32), as well as bias an rf power amplifier (pa) in wireless handset applications. the max4230 comes in a tiny 5-pin sc70 package and the max4231, single with shutdown, is offered in a 6-pin sc70 package and in 1.5mm x 1.0mm ucsp and thin dfn packages. the dual op-amp max4233 is offered in the space-saving 10-bump chip-scale package (ucsp?), providing the smallest footprint area for a dual op amp with shutdown. these op amps are designed to be part of the pa control cir - cuitry, biasing rf pas in wireless headsets. the max4231/ max4233 offer a shdn feature that drives the output low. this ensures that the rf pa is fully disabled when needed, preventing unconverted signals to the rf antenna. applications rf pa biasing controls in handset applications portable/battery-powered audio applications portable headphone speaker drivers (32) audio hands-free car phones (kits) tablet/notebook computers digital-to-analog converter buffers transformer/line drivers motor drivers beneits and features optimized for headsets and high-current outputs ? 200ma output drive capability ? 100db voltage gain (r l = 100k) ? 85db power-supply rejection ratio ? no phase reversal for overdriven inputs ? unity-gain stable for capacitive loads to 780pf suitable for high-bandwidth applications ? 10mhz gain-bandwidth product ? high slew rate: 10v/s extends the battery life of portable applications ? 1.1ma supply current per ampliier low-power shutdown mode reduces supply current to < 1a small package options ? tiny, 2.1mm x 2.0mm space-saving sc70 package selector guide appears at end of data sheet. pin/bump configurations appear at end of data sheet. ordering information continued at end of data sheet. visit www.maximintegrated.com/products/patents for product patent marking information. ucsp is a trademark of maxim integrated products, inc. +denotes a lead(pb)-free/rohs-compliant package. t = tape and reel. part temp range pin- package top mark max4230 axk+t -40c to +125c 5 sc70 acs max4230axk/v+t -40c to +125c 5 sc70 +auu max4230auk+t -40c to +125c 5 sot23 abzz max4231 axt+t -40c to +125c 6 sc70 aba max4231aut+t -40c to +125c 6 sot23 abnf max4231art+t -40c to +125c 6 ucsp aam MAX4231AYT+t -40c to +125c 6 thin dfn (ultra-thin lga) +ah max4231 dac shdn c r f r iso c load i load = 30ma antenna r pa 2.7v to 5.5v max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 19-2164; rev 19; 1/15 typical operating circuit ordering information downloaded from: http:///
supply voltage (v dd to v ss ) ................................................6v all other pins ...................................(v ss - 0.3v) to (v dd + 0.3v) output short-circuit duration to v dd or v ss (note 1) ...............10s continuous power dissipation (multilayer, ta = +70c) 5-pin sc70 (derate 3.1mw/c above +70c) ..............247mw 5-pin sot23 (derate 3.9mw/c above +70c)............313mw 6-pin sc70 (derate 3.1mw/c above +70c) ..............245mw 6-pin sot23 (derate 13.4mw/c above +70c)........1072mw 6-pin thin dfn (derate 2.1mw/c above +70c)...170.2mw 6-bump ucsp (derate 3.9mw/c above +70c) .....308.3mw 8-pin sot23 (derate 5.1mw/c above +70c).........408.2mw 8-pin max ? (derate 4.8mw/c above +70c) .......387.8mw 10-pin max (derate 8.8mw/c above +70c) .......707.3mw 10-bump ucsp (derate 5.6mw/c above +70c) .....448.7mw 14-pin so (derate 11.9mw/c above +70c) ..........952.4mw 14-pin tssop (derate 10mw/c above +70c) ......796.8mw operating temperature range .........................-40c to +125c junction temperature ......................................................+150c storage temperature range .............................-65c to +150c lead temperature (excluding 6 and 10 ucsp, soldering, 10s) ................+300c soldering temperature (reflow) .......................................+260c note 1: package power dissipation should also be observed. (v dd = 2.7v, v ss = 0v, v cm = v dd/2 , v out = (v dd/2 ), r l = connected to (v dd/2 ), v shdn = v dd , t a = +25c , unless otherwise noted.) (note 2) max is a registered trademark of maxim integrated products, inc. parameter symbol conditions min typ max units operating supply voltage range v dd inferred from psrr test 2.7 5.5 v input offset voltage v os 0.85 6 mv input bias current (note 4) i b v cm = v ss to v dd 1 pa input offset current i os v cm = v ss to v dd 50 pa input resistance r in 1000 m? common-mode input voltage range v cm inferred from cmrr test v ss v dd v common-mode rejection ratio cmrr v ss < v cm < v dd 52 70 db power-supply rejection ratio psrr v dd = 2.7v to 5.5v 73 85 db shutdown output impedance r out v shdn = 0v (note 3) 10 ? output voltage in shutdown v out( shdn ) v shdn = 0v, r l = 200? (note 3) 68 mv large-signal voltage gain a vol v ss + 0.20v < v out < v dd - 0.20v r l = 100k? 100 db r l = 2k? 85 98 r l = 200? 74 80 output voltage swing v out r l = 32? v dd - v oh 400 500 mv v ol - v ss 360 500 r l = 200? v dd - v oh 80 120 v ol - v ss 70 120 r l = 2k? v dd - v oh 8 14 v ol - v ss 7 14 max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 www.maximintegrated.com maxim integrated 2 absolute maximum ratings stresses beyond those listed under absolute maximum ratings may cause permanent damage to the devi ce. 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. dc electrical characteristics downloaded from: http:///
(v dd = 2.7v, v ss = 0v, v cm = v dd/2 , v out = (v dd/2 ), r l = connected to (v dd/2 ), v shdn = v dd , t a = +25c , unless otherwise noted.) (note 2) (v dd = 2.7v, v ss = 0v, v cm = v dd/2 , v out = (v dd/2 ), r l = connected to (v dd/2 ), v shdn = v dd , t a = -40 to +125c , unless other wise noted.) (note 2) parameter symbol conditions min typ max units operating supply voltage range v dd inferred from psrr test 2.7 5.5 v input offset voltage v os 8 mv offset-voltage tempco ?v os /?t 3 v/c input bias current (note 4) i b t a = -40c to +85c 17 pa t a = -40c to +125c 550 common-mode input voltage range v cm inferred from cmrr test v ss v dd v common-mode rejection ratio cmrr v ss < v cm < v dd 46 db power-supply rejection ratio psrr v dd = 2.7v to 5.5v 70 db output voltage in shutdown v out( shdn ) v shdn = 0v, r l = 200? (note 3) 150 mv large-signal voltage gain a vol v ss + 0.20v < v dd - 0.20v r l = 2k? 76 db r l = 200? 67 output voltage swing v out r l = 32? t a = +85c v dd - v oh 650 mv v ol - v ss 650 r l = 200? v dd - v oh 150 v ol - v ss 150 r l = 2k? v dd - v oh 20 v ol - v ss 20 parameter symbol conditions min typ max units output source/sink current i out v dd = 2.7v, v in = 100mv 70 ma v dd = 5v, v in = 100mv 200 output voltage i l = 10ma v dd = 2.7v v dd - v oh 128 200 mv v ol - v ss 112 175 i l = 30ma v dd = 5v v dd - v oh 240 320 v ol - v ss 224 300 quiescent supply current (per ampliier) i dd v dd = 5.5v, v cm = v dd /2 1.2 2.3 ma v dd = 2.7v, v cm = v dd /2 1.1 2.0 shutdown supply current (per ampliier) (note 3) i dd( shdn ) v shdn = 0v, r l = v dd = 5.5v 0.5 1 a v dd = 2.7v 0.1 1 shdn logic threshold (note 3) v il shutdown mode 0.8 v v ih normal mode v dd x 0.57 shdn input bias current v ss < v shdn < v dd (note 3) 50 pa max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 www.maximintegrated.com maxim integrated 3 dc electrical characteristics (continued)dc electrical characteristics downloaded from: http:///
(v dd = 2.7v, v ss = 0v, v cm = v dd/2 , v out = (v dd/2 ), r l = connected to (v dd/2 ), v shdn = v dd , t a = -40 to +125c , unless other wise noted.) (note 2) (v dd = 2.7v, v ss = 0v, v cm = v dd /2, v out = (v dd /2), r l = connected to (v dd /2), v shdn = v dd , t a = +125c , unless otherwise noted.) (note 2) note 2: all units 100% tested at +25c. all temperature limits are guaranteed by design. note 3: shdn logic parameters are for the max4231/max4233 only. note 4: guaranteed by design. parameter symbol conditions min typ max units output voltage i l = 10ma v dd = 2.7v v dd - v oh 250 mv v ol - v ss 230 i l = 30ma t a = -40c to +85 v dd = 5v v dd - v oh 400 v ol - v ss 370 quiescent supply current (per ampliier) i dd v dd = 5.5v, v cm = v dd /2 2.8 ma v dd = 2.7v, v cm = v dd /2 2.5 shutdown supply current (per ampliier) (note 3) i dd( shdn ) v shdn < 0v, r l = v dd = 5.5v 2.0 a v dd = 2.7v 2.0 shdn logic threshold (note 3) v il shutdown mode 0.8 v v ih normal mode v dd x 0.61 parameter symbol conditions min typ max units gain-bandwidth product gbwp v cm = v dd /2 10 mhz full-power bandwidth fpbw v out = 2v p-p , v dd = 5v 0.8 mhz slew rate sr 10 v/s phase margin pm 70 degrees gain margin gm 15 db total harmonic distortion plus noise thd+n f = 10khz, v out = 2v p-p , a vcl = 1v/v 0.0005 % input capacitance c in 8 pf voltage-noise density e n f = 1khz 15 nv/ hz f = 10khz 12 channel-to-channel isolation f = 1khz, rl = 100k 125 db capacitive-load stability a vcl = 1v/v, no sustained oscillations 780 pf shutdown time t shdn (note 3) 1 s enable time from shutdown t enable (note 3) 6 s power-up time t on 5 s max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 www.maximintegrated.com maxim integrated 4 dc electrical characteristicsac electrical characteristics downloaded from: http:///
(v dd = 2.7v, v ss = 0v, v cm = v dd /2, v out = v dd /2, r l = , connected to v dd /2, v shdn = v dd , t a = +25c, unless otherwise noted.) gain and phase vs. frequency frequency (hz) 0.01k 10k 100k 1m 10m 0.1k 1k 100m gain (db) 70 -30 -20 -10 0 10 20 30 6050 40 -180 phase () 120 -150 -120 -90 -60 -30 0 9060 30 max4230 toc01 a v = 1000v/v gain and phase vs. frequency (c l = 250pf) frequency (hz) 0.01k 10k 100k 1m 10m 0.1k 1k 100m gain (db) 70 -30 -20 -10 0 10 20 30 6050 40 -180 phase () 120 -150 -120 -90 -60 -30 0 9060 30 max4230 toc02 a v = 1000v/v c l = 250pf power-supply rejection ratio vs. frequency frequency (hz) 0.01k 10k 100k 1m 0.1k 1k 10m max4230 toc03 psrr (db) 0 -100 -90 -80 -70 -60 -50 -40 -10-20 -30 a v = 1v/v 1000 100 10 1 0.1 0.01 1k 100k 1m 10k 10m output impedance vs. frequency max4230 toc04 frequency (hz) output impedance ( ? ) a v = 1v/v 0 0.40.2 0.80.6 1.21.0 1.4 1.81.6 2.0 -40 0 20 40 -20 60 80 100 120 supply current vs. temperature max4230 toc05 temperature (c) supply current (ma) 50 60 70 80 90 100 110 -40 0 -20 20 40 60 80 100 120 max4230 toc06 temperature (c) supply current (na) supply current vs. temperature (shdn = low) shdn = v ss max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 maxim integrated 5 www.maximintegrated.com typical operating characteristics downloaded from: http:///
(v dd = 2.7v, v ss = 0v, v cm = v dd /2, v out = v dd /2, r l = , connected to v dd /2, v shdn = v dd , t a = +25c, unless otherwise noted.) 0 0.60.4 0.2 1.00.8 1.81.6 1.4 1.2 2.0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 max4230 toc07 supply voltage (v) supply current (ma) supply current per amplifier vs. supply voltage -40 0 -20 20 40 60 80 100 120 max4230 toc08 temperature (c) -2 -1 0 1 2 v os (mv) input offset voltage vs. temperature v dd = 5.0v v dd = 2.7v 0 20 40 60 80 100 -40 0 -20 20 40 60 80 100 120 output swing high vs. temperature max4230/34 toc09 temperature (c) v dd - v out (mv) v dd = 2.7v r l = 200 ? v dd = 5.0v r l = 200 ? 0 4020 8060 120100 140 -40 0 20 -20 40 60 80 100 120 output swing low vs. temperature max4230/3 toc10 temperature (c) v out - v ss (mv) v dd = 5.0v r l = 200 ? v dd = 2.7v r l = 200 ? -2.0 -1.0 -1.5 -0.5 0.5 0 1.0 0 0.5 1.0 1.5 2.0 2.5 input offset voltage vs. common-mode voltage max4230/3 toc11 common-mode voltage (v) input offset voltage (mv) 0.2 0.6 0.4 1.00.8 1.2 0 0.5 1.0 1.5 2.0 2.5 supply current per amplifier vs. common-mode voltage max4230/3 toc12 common-mode voltage (v) supply current (ma) v dd = 2.7v 0.2 0.80.6 0.4 1.0 1.2 1.4 0 2.0 1.5 0.5 1.0 2.5 3.0 3.5 4.0 4.5 5.0 supply current per amplifier vs. common-mode voltage max4230/34 toc13 common-mode voltage (v) supply current (ma) v dd = 5.0v 0.45 10 100 1k 10k 100k total harmonic distortion plus noise vs. frequency 0.05 max4230/34 toc14 frequency (hz) thd+n (%) 0.15 0.25 0.35 0.300.20 0.10 0 0.40 r l = 32 v out = 2v p-p 500khz lowpass filter r l = 10k total harmonic distortion plus noise vs. peak-to-peak output voltage max4230/34 toc15 peak-to-peak output voltage (v) thd+n (%) 10 0.0001 4.0 4.2 4.6 5.0 0.001 0.1 1 4.4 4.8 r l = 250 r l = 25 r l = 100k f = 10khzv dd = 5v r l = 2k max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 maxim integrated 6 www.maximintegrated.com typical operating characteristics (continued) downloaded from: http:///
(v dd = 2.7v, v ss = 0v, v cm = v dd /2, v out = v dd /2, r l = , connected to v dd /2, v shdn = v dd , t a = +25c, unless otherwise noted.) 400ns/div small-signal transient response (noninverting) in 50mv/div max4230/34 toc16 out 400ns/div small-signal transient response (inverting) in 50mv/div max4230/34 toc17 out 400ns/div large-signal transient response (noninverting) in 1v/div max4230/34 toc18 out 400ns/div large-signal transient response (inverting) in 1v/div max4230/34 toc19 out 0 2010 30 60 7050 40 80 1.0 1.4 1.6 1.8 2.0 1.2 2.2 2.4 2.6 2.8 3.0 output current vs. output voltage (sourcing, v dd = 2.7v) max4230/34 toc20 output voltage (v) output current (ma) v diff = 100mv -80 -60-70 -40-50 -30 -20 -10 0 0 0.4 0.6 0.2 0.8 1.0 1.2 1.4 1.6 output current vs. output voltage (sinking, v dd = 2.7v) max4230/34 toc21 output voltage (v) output current (ma) v diff = 100mv -250 -200 -100-150 -50 0 0 1.0 0.5 1.5 2.0 2.5 3.0 output current vs. output voltage (sinking, v dd = 5.0v) max4230/34 toc23 output voltage (v) output current (ma) v diff = 100mv -250 -200 -100-150 -50 0 0 1.0 0.5 1.5 2.0 2.5 3.0 output current vs. output voltage (sinking, v dd = 5.0v) max4230/34 toc23 output voltage (v) output current (ma) v diff = 100mv 200100 10 100 10k 100k frequency (hz) 1k input voltage noise vs. frequency input voltage noise (nv/ hz) max4230/34 toc24 max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 maxim integrated 7 www.maximintegrated.com typical operating characteristics (continued) downloaded from: http:///
detailed description rail-to-rail input stage the max4230Cmax4234 cmos operational amplifiers have parallel-connected n- and p-channel differential input stages that combine to accept a common-mode range extending to both supply rails. the n-channel stage is active for common-mode input voltages typically greater than (v ss + 1.2v), and the p-channel stage is active for common-mode input voltages typically less than (v dd - 1.2v). applications information package power dissipation warning: due to the high output current drive, this op amp can exceed the absolute maximum power- dissipation rating. as a general rule, as long as the peak current is less than or equal to 40ma, the maximum package power dissipation is not 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 equation below gives an approximation of the package power dissipation: ic(diss) rms rms p v i cos ? where:v rms = rms voltage from v dd to v out when sourcing current and rms voltage from v out to v ss when sinking current.i rms = rms current flowing out of or into the op amp and the load. = phase difference between the voltage and the current. for resistive loads, cos = 1. pin bump name function m ax 4230 sot23/ sc70 m ax 4231 sot23/ sc70/t h in dfn m ax 4232 sot23/ m a x m a x4233 m a x m ax 4234 tssop/so m a x4231 ucsp m ax 4233 ucsp 1 1 b1 in+ noninverting input 2 2 4 4 11 a1 b4 v ss negative supply input. connect to ground for single- supply operation. 3 3 b2 in- inverting input 4 4 a2 out ampliier output 5 6 8 10 4 a3 b1 v dd positive supply input 5 5, 6 b3 c4, a4 shdn , shdn1 , shdn2 shutdown control. tie to high for normal operation. 3 3 3 c3 in1+ noninverting input to ampliier 1 2 2 2 c2 in1- inverting input to ampliier 1 1 1 1 c1 out1 ampliier 1 output 5 7 5 a3 in2+ noninverting input to ampliier 2 6 8 6 a2 in2- inverting input to ampliier 2 7 9 7 a1 out2 ampliier 2 output 10, 12 in3+, n4+ noninverting input to ampliiers 3 9, 13 in3-, in4- inverting input to ampliiers 3 and 8, 14 out3, out4 ampliiers 3 and 4 outputs max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 www.maximintegrated.com maxim integrated 8 pin description downloaded from: http:///
for example, the circuit in figure 1 has a package power dissipation of 196mw: peak dd dc rms peak rms dc rms v rms (v v ) 2 1.0v 3.6v 1.8v 2.507v 2 i 1.8v 1.0v / 32 ii 32 22 78.4ma ??+ = ?+ = ? ?+ = + ? = where:v dc = the dc component of the output voltage. i dc = the dc component of the output current. v peak = the highest positive excursion of the ac compo - nent of the output voltage. i peak = the highest positive excursion of the ac compo - nent of the output current. therefore: ic(diss) rms rms p = v i cos = 196mw adding a coupling capacitor improves the package power dissipation because there is no dc current to the load, as shown in figure 2 : peak rms rms peak rms dc rms v v 2 1.0v 0.707v 2 i 1.0v / 32 i i 0a 22 22.1ma ? = = ? ?+ =+ = therefore: ic(diss) rms rms p = v i cos = 15.6mw if the configuration in figure 1 were used with all four of the max4234 amplifiers, the absolute maximum power dissipation rating of this package would be exceeded (see the absolute maximum ratings section). 60mw single-supply stereo headphone driver two max4230/max4231s can be used as a single-supply, stereo headphone driver. the circuit shown in figure 2 can deliver 60mw per channel with 1% distortion from a single 5v supply. the input capacitor (c in ), in conjunction with r in , forms a highpass filter that removes the dc bias from the incom - ing signal. the -3db point of the highpass filter is given by 3db in in 1 f 2r c ? = figure 1. max4230/max4231 used in single-supply operation circuit example figure 2. circuit example: adding a coupling capacitor greatly reduces power dissipation of its package 3.6v v in = 2v p-p r c 32 ? r max4230max4231 right audio input left audio input c in c in r in r in r f c out v bias headphone jack to 32 ? stereo headset r f max4230 c out max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 www.maximintegrated.com maxim integrated 9 downloaded from: http:///
choose gain-setting resistors r in and r f according to the amount of desired gain, keeping in mind the maximum output amplitude. the output coupling capacitor, c out , blocks the dc component of the amplifier output, prevent - ing dc current flowing to the load. the output capacitor and the load impedance form a highpass filer with the -3db point determined by: 3db in out 1 f 2r c ? = for a 32 load, a 100f aluminum electrolytic capacitor gives a low-frequency pole at 50hz. bridge ampliier the circuit shown in figure 3 uses a dual max4230 to implement a 3v, 200mw amplifier suitable for use in size- constrained applications. this configuration eliminates the need for the large coupling capacitor required by the single op-amp speaker driver when single-supply opera - tion is necessary. voltage gain is set to 10v/v; however, it can be changed by adjusting the 82k resistor value. rail-to-rail input stage the max4230Cmax4234 cmos op amps have parallel connected n- and p-channel differential input stages that combine to accept a common-mode range extending to both supply rails. the n-channel stage is active for common-mode input voltages typically greater than (v ss + 1.2v), and the p-channel stage is active for common- mode input voltages typically less than (v dd -1.2v). rail-to-rail output stage the minimum output is within millivolts of ground for single-supply operation, where the load is referenced to ground (v ss ). figure 4 shows the input voltage range and the output voltage swing of a max4230 connected as a voltage follower. the maximum output voltage swing is load dependent; however, it is guaranteed to be within 500mv of the positive rail (v dd = 2.7v) even with maxi - mum load (32 to ground). observe the absolute maximum ratings for power dis - sipation and output short-circuit duration (10s, max) because the output current can exceed 200ma (see the typical operating characteristics .) input capacitance one consequence of the parallel-connected differential input stages for rail-to-rail operation is a relatively large input capacitance c in (5pf typ). this introduces a pole at frequency (2rc in ) -1 , where r is the parallel com - bination of the gain-setting resistors for the inverting or noninverting amplifier configuration ( figure 5 ). if the pole frequency is less than or comparable to the unity-gain bandwidth (10mhz), the phase margin is reduced, and the amplifier exhibits degraded ac performance through either ringing in the step response or sustained oscilla - tions. the pole frequency is 10mhz when r = 2k. to maximize stability, r << 2k is recommended. figure 3. dual max4230/max4231 bridge amplifier for 200mw at 3v figure 4. rail-to-rail input/output range 1 6 7 5 2 8 3v 3v 3 4 1/2 max4232 1/2 max4232 0.5v p-p r551k ? r1 16k ? r2 82k ? r4 10k ? 32w f s = 100hz r3 10k ? r651k ? c2 0.1f c1 0.1mf in 1v/div out 1v/div 5 s/div v cc = 3.0v r l = 100k ? max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 www.maximintegrated.com maxim integrated 10 downloaded from: http:///
to improve step response when r > 2k, connect small capacitor cf between the inverting input and output. choose cf as follows: c f = 8(r/r f ) [pf] where r f is the feedback resistor and r is the gain-setting resistor ( figure 5 ). driving capacitive loads the max4230Cmax4234 have a high tolerance for capacitive loads. they are stable with capacitive loads up to 780pf. figure 6 is a graph of the stable operating region for various capacitive loads vs. resistive loads.figures 7 and 8 show the transient response with excessive capaci - tive loads (1500pf), with and without the addition of an isolation resistor in series with the output. figure 9 shows a typical noninverting capacitive-load-driving circuit in the unity-gain configuration. figure 6. capacitive-load stability figure 7. small-signal transient response with excessive capacitive load figure 8. small-signal transient response with excessive capacitive load with isolation resistor figure 5. inverting and noninverting amplifiers with feedback compensation 0 500 15001000 2000 2500 1 100 10 1k 10k 100k resistive load ( ? ) capacitive load (pf) v dd = 5.0v r l to v dd /2 stable unstable 1/div 20mv/div20mv/div v dd = 3.0v, c l = 1500pf r l = 100k ? , r iso = 0 ? 1/div 20mv/div20mv/div v dd = 3.0v, c l = 1500pf r l = 100k ? , r iso = 39 ? max4230 v in v out r = r || r f r f c f = rc in r f c f r inverting max4230 v in v out r = r || r f r f c f = rc in r f r c f noninverting max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 www.maximintegrated.com maxim integrated 11 downloaded from: http:///
the resistor improves the circuits phase margin by isolat - ing the load capacitor from the op amps output. power-up and shutdown modes the max4231/max4233 have a shutdown option. when the shutdown pin ( shdn ) is pulled low, supply current drops to 0.5a per amplifier (v dd = 2.7v), the amplifiers are disabled, and their outputs are driven to v ss . since the outputs are actively driven to v ss in shutdown, any pullup resistor on the output causes a current drain from the supply. pulling shdn high enables the amplifier. in the dual max4233, the two amplifiers shut down indepen - dently. figure 10 shows the max4231s output voltage to a shutdown pulse. the max4231Cmax4234 typically settle within 5s after power-up. figures 11 and 12 show idd to a shutdown plus and voltage power-up cycle. when exiting shutdown, there is a 6s delay before the amplifiers output becomes active ( figure 10 ). figure 9. capacitive-load-driving circuit figure 11. shutdown enable/disable supply current figure 10. shutdown output voltage enable/disable figure 12. power-up/down supply current part amps per package shutdown mode max4230 single max4231 single yes max4232 dual max4233 dual yes max4234 quad r iso c l 100s/div shdn 2v/div i dd 1ma/div out 2v/div 4s/div 1v/div 1v/div 40s/div v dd 2v/div i dd 1ma/div max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 www.maximintegrated.com maxim integrated 12 selector guide downloaded from: http:///
power supplies and layout the max4230Cmax4234 can operate from a single 2.7v to 5.5v supply, or from dual 1.35v to 2.5v supplies. or single-supply operation, bypass the power supply with a 0.1f ceramic capacitor. for dual-supply operation, bypass each supply to ground. good layout improves performance by decreasing the amount of stray capaci - tance at the op amps inputs and outputs. decrease stray capacitance by placing external components close to the op amps pins, minimizing trace and lead lengths. +denotes a lead-free(pb)/rohs-compliant package. t = tape and reel. /v denotes an automotive-qualified part. *ep = exposed pad. part temp range pin- package top mark max4232 aka+t -40c to +125c 8 sot23 aakw max4232aua+t -40c to +125c 8 max max4233 aub+t -40c to +125c 10 max max4233abc+t -40c to +125c 10 ucsp abf max4234 aud -40c to +125c 14 tssop max4234aud/v+ -40c to +125c 14 tssop +ywd max4234asd -40c to +125c 14 so top view in2- in2+ v ss 12 8 7 v dd out2 in1- in1+ out1 sot23/max 3 4 6 5 max4232 1 23 4 5 10 98 7 6 v dd out2in2- in2+ v ss in1+ in1- out1 max4233 max shdn2 shdn1 v ss out in- 1 6 v dd 5 in+ sc70/sot23 2 3 4 shdn max4231 1413 12 11 10 9 8 1 23 45 6 7 out4in4- in4+ v ss v dd in1+ in1- out1 max4234 in3+ in3- out3 out2 in2- in2+ tssop/so v ss out in- 1 5 v dd in+ max4230 sot23/sc70 23 4 out1 v dd out2 in1- in2- in1+ in2+ v ss ucsp max4233 shdn1 shdn2 1 2 3 4 ab c in+ v ss in- out v dd ucsp max4231 1 2 3 a b 1 2 3 4 5 6 v dd out in+ in- v ss max4231 thin dfn (ultra-thin lga) shdn + + + + + + shdn max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 www.maximintegrated.com maxim integrated 13 pin/bump conigurations ordering information (continued) downloaded from: http:///
package type package code document no. land pattern no. 5 sc70 x5+1 21-0076 90-0188 6 sc70 x6sn+1 21-0077 90-0189 5 sot23 u5+1 21-0057 90-0174 6 sot23 u6sn+1 21-0058 90-0175 8 max u8+1 21-0036 90-0092 8 sot23 k8+5 21-0078 90-0176 10 max u10+2 21-0061 90-0330 10 ucsp b12+4 21-0104 6 ucsp r61a1+1 21-0228 6 thin dfn (ultra-thin lga) y61a1+1 21-0190 90-0233 14 tssop u14+1 21-0066 90-0113 14 so s14+1 21-0041 90-0112 max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 www.maximintegrated.com maxim integrated 14 package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different su ffix character, but the drawing pertains to the package regardless of rohs status. downloaded from: http:///
revision number revision date description pages changed 7 7/08 added 6-pin dfn package for the max4231 1, 2, 8, 13 8 10/08 corrected top mark for max4321, 6 sot23 package; changed max4320 and 4321 to lead-free packages 1 9 10/08 added shutdown pin limits 3, 4 10 12/08 added automotive part number 13 11 9/09 corrected top mark designation and pin coniguration, and added ucsp package 1, 2, 8, 13 12 1/10 updated absolute maximum ratings section 2 13 1/11 added 10 max to package information section 14 14 10/11 updated electrical characteristics table with specs for bias current at various temperatures 1C4 15 3/12 updated thermal data in the absolute maximum ratings 2 16 6/12 added automotive part number for max4230 1 17 12/13 updated t enable speciication in the ac electrical characteristics 6 18 10/14 corrected dfn references and added ultra-thin lga reference to ordering information , pin conigurations , and package information 1, 13, 14 19 1/15 updated general description , applications , and beneits and features sections 1 maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and speciications without n otice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. max4230Cmax4234 high-output-drive, 10mhz, 10v/s, rail-to-rail i/o op amps with shutdown in sc70 ? 2015 maxim integrated products, inc. 15 revision history for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com. downloaded from: http:///

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