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MAX478/max479 17? max, dual/quad, single-supply, precision op amps ________________________________________________________________ maxim integrated products 1 1 2 3 4 8 7 6 5 v+ outb inb- inb+ v- ina+ ina- outa MAX478 dip/so top view 1 2 3 4 14 13 12 11 outd ind- ind+ v- v+ ina+ ina- outa max479 dip/so 5 6 7 10 9 8 inc+ inc- outc outb inb- inb+ a d b c a b _________________pin configurations v2 v1 r3 r1 r2 r2 r1 +5v v out micropower, high input impedance differential amplifier with variable gain in 8-pin dip/so 1/2MAX478 1/2MAX478 v out = (v1-v2) (1 + r1 + 2 r1 ) r2 r3 __________typical operating circuit call toll free 1-800-998-8800 for free samples or literature. 19-0127; rev. 0; 4/93 _______________general description the MAX478 and max479 are dual and quad micro- power, precision op amps available in 8-pin and 14-pin dip and small-outline packages, respectively. both devices feature an extremely low, 17? max supply current per op amp, 70? max offset voltage, 2.2?/? max offset voltage drift (0.5?/? typ), and 250pa max input offset current. the MAX478 and max479 operate from a single sup- ply. the input voltage range includes ground, and the output swings to within a few millivolts of ground, which eliminates pull-down resistors and saves power. both devices are optimized for single 3v and 5v sup- ply operation, with guaranteed specifications at each supply voltage. specifications for ?5v operation are also provided. _______________________applications battery- or solar-powered systems: portable instrumentation remote sensor amplifier satellite circuitry micropower sample-and-hold thermocouple amplifier micropower filters single lithium cell powered systems ___________________________features ? 17? max supply current (MAX478a/max479a) ? 70? max offset voltage (MAX478a) ? single-supply operation: input voltage range includes ground output swings to ground while sinking current no pull-down resistors required ? dual op amp in 8-pin dip/so package (MAX478), quad op amp in 14-pin dip/so package (max479) ? 250pa max input offset current (MAX478a/max479a) ? 0.5?/? offset-voltage drift ? output sources and sinks 5ma load current ______________ordering information part temp. range pin-package MAX478 acpa 0? to +70? 8 plastic dip MAX478cpa 0? to +70? 8 plastic dip MAX478csa 0? to +70? 8 so MAX478c/d 0? to +70? dice* MAX478epa -40? to +85? 8 plastic dip MAX478esa -40? to +85? 8 so max479 acpd 0? to +70? 14 plastic dip max479cpd 0? to +70? 14 plastic dip max479csd 0? to +70? 14 so max479epd -40? to +85? 14 plastic dip max479esd -40? to +85? 14 so * dice are specified at t a = +25c, dc parameters only.
MAX478/max479 17? max, dual/quad, single-supply, precision op amps 2 _______________________________________________________________________________________ supply voltage .............................................. ?2v differential input voltage .................................... ?0v input voltage ................... equal to positive supply voltage ............................... 5v below negative supply voltage output short-circuit duration ......................... continuous continuous power dissipation (t a = +70?): 8-pin plastic dip (derate 9.09mw/? above +70?) . . . . . 727mw 14-pin plastic dip (derate 10.00mw/? above +70?) . . 800mw 14-pin wide so (derate 9.52mw/? above +70?) . . . 762mw operating temperature ranges: max47_acp_/c_ _ ............................... 0? to +70? max47_e_ _ ....................................-40c to +85? storage temperature range ...................-65c to +150? lead temperature (soldering, 10sec) .................... +300? electrical characteristics: 5v (v s = 5v, 0v, v cm = 0.1v, v o = 1.4v, t a = +25?, unless otherwise noted.) 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. absolute maximum ratings parameter symbol conditions MAX478c/e max479c/e min typ max units input offset voltage v os MAX478acp/cp/ep 30 70 40 120 ? max479acp/cp/ep 35 100 40 150 MAX478cs/es 80 180 max479cs/es 90 250 d v os d time 0.5 0.6 ?/mo. i os 0.05 0.25 0.05 0.35 na input bias current i b 35 36 na input noise voltage e n 0.1hz to 10hz (note 1) 0.9 2.0 0.9 ? p-p input noise voltage density f o = 10hz (note 1) 50 75 50 nv/ hz f o = 1000hz (note 1) 49 65 49 input noise current i n 0.1hz to 10hz (note 1) 1.5 2.5 1.5 pa p-p input noise current density f o = 10hz (note 1) 0.03 pa/ hz f o = 1000hz 0.01 0.01 input resistance r in differential mode (note 1) 0.8 2.0 0.6 2.0 g common mode 12 12 input voltage range v in (cm) upper limit 3.5 3.9 3.5 3.9 v lower limit 0 -0.3 0 -0.3 cmrr v cm = 0v to 3.5v 93 103 90 102 db power-supply rejection ratio psrr v s = 2.2v to 12v 94 104 92 104 db large-signal voltage gain a vol 140 700 110 700 v/mv v o = 0.03v to 3.5v, r l = 50k 80 200 70 200 MAX478ac max479ac min typ max long-term input offset- voltage stability input offset current common-mode rejection ratio v o = 0.03v to 4v, no load (note 1) 0.03 0.07
MAX478/max479 17? max, dual/quad, single-supply, precision op amps _______________________________________________________________________________________ 3 parameter symbol conditions MAX478ac max479ac min typ max MAX478c/e max479c/e min typ max units output voltage swing v out output low, no load 6.5 9.0 6.5 9.0 mv output low, 2k to gnd 0.2 0.6 0.2 0.6 output low, i sink = 100? 120 160 120 160 4.2 4.4 v output high, 2k to gnd 3.5 3.8 3.5 3.8 slew rate sr a v = +1, c l = 1pf (note 1) 0.013 0.025 0.013 0.025 v/? gain-bandwidth product gbw f o 5khz 60 60 khz channel separation d v in = 3v, r l = 10k 130 130 db minimum supply voltage v s (note 2) 2.0 2.2 2.0 2.2 v i s 13 18 14 21 ? supply current per amplifier v s = ?.5v, v o = 0v 12 17 13 20 output high, no load electrical characteristics: 5v (continued) (v s = 5v, 0v, v cm = 0.1v, v o = 1.4v, t a = +25?, unless otherwise noted.) 4.2 4.4 electrical characteristics: 5v (v s = 5v, 0v, v cm = 0.1v, v o = 1.4v, t a = 0? to +70?, unless otherwise noted.) parameter symbol conditions MAX478ac max479ac min typ max MAX478c max479c min typ max units max479cs 130 400 input offset voltage v os MAX478acp/cp 50 170 65 250 ? max479acp/cp 60 200 70 290 MAX478cs 120 300 input offset voltage drift d v os d t max47_acp/cp (note 1) 0.5 2.2 0.6 3.0 ?/? max47_cs (note 1) 0.8 4.5 input offset current i os 0.06 0.35 0.06 0.50 na input bias current i b 36 37 na cmrr v cm = 0v to 3.4v 90 101 86 100 db power-supply rejection ratio psrr v s = 2.5v to 12v 90 102 88 102 db large-signal voltage gain a vol 105 500 80 500 v/mv 55 160 45 160 output voltage swing v out output low, no load 8 11 8 11 mv output low, i sink = 100? 140 190 140 190 output high, no load 4.1 4.3 4.1 4.3 v output high, 2k to gnd 3.3 3.8 3.3 3.8 supply current per amplifier i s 14 21 15 24 ? common-mode rejection ratio v o = 0.05v to 4v, no load (note 1) v o = 0.05v to 3.5v, r l = 50k
MAX478/max479 17? max, dual/quad, single-supply, precision op amps 4 _______________________________________________________________________________________ electrical characteristics: 5v (v s = 5v, 0v, v cm = 0.1v, v o = 1.4v, t a = -40? to +85?, unless otherwise noted.) parameter symbol conditions MAX478ep max479ep min typ max MAX478es max479es min typ max units input offset voltage drift d v os d t (note 1) 0.6 3.0 0.8 4.5 ?/? input offset current i os 0.07 0.7 0.07 0.7 na input bias current i b 48 48 na common-mode rejection ratio cmrr v cm = 0.05v to 3.2v 84 98 84 98 db input offset voltage v os MAX478 80 315 150 400 ? power-supply rejection ratio psrr v s = 3.0v to 12v 86 100 86 100 db large-signal voltage gain a vol v o = 0.05v to 4v, no load (note 1) 55 350 55 350 v/mv max479 80 345 160 530 v o = 0.05v to 3.5v, r l = 50k 35 130 35 130 output voltage swing v out output low, no load 9 13 9 13 mv output low, i sink = 100? 160 220 160 220 output high, no load 3.9 4.2 3.9 4.2 v output high, 2k to gnd 3.0 3.7 3.0 3.7 supply current per amplifier i s 15 27 15 27 ?
MAX478/max479 17? max, dual/quad, single-supply, precision op amps _______________________________________________________________________________________ 5 electrical characteristics: 3v (v s = 3v, 0v, v cm = 0.1v, v o = 0.8v, t a = +25?, unless otherwise noted.) parameter symbol conditions MAX478ac max479ac min typ max MAX478c/e max479c/e min typ max units max479cs/es input offset current i os 90 270 0.05 0.05 na input bias current i b 33na common-mode rejection ratio cmrr v cm = 0v to 1.7v 93 103 90 102 db input offset voltage v os MAX478acp/cp/ep 30 90 40 140 ? max479acp/cp/ep 35 120 40 170 power-supply rejection ratio psrr v s = 2.2v to 12v 94 104 92 104 db large-signal voltage gain a vol 100 600 100 600 v/mv MAX478cs/es 80 200 v o = 0.03v to 1.5v, r l = 50k 60 180 60 180 output voltage swing v out output low, no load 6 9 6 9 mv output low, 2k to gnd 0.2 0.6 0.2 0.6 output high, no load 2.2 2.4 2.2 2.4 v output high, 2k to gnd 1.8 2.0 1.8 2.0 supply current per amplifier i s 12 17 13 20 ? input noise voltage e n 0.1hz to 10hz 1.0 1.0 ? p-p input voltage range v in (cm) upper limit 1.7 1.9 1.7 1.9 v lower limit 0 -0.3 gain-bandwidth product gbw f o 5khz 50 50 khz minimum supply voltage v s 2.2 2.2 v v o = 0.03v to 2v, no load (note 1) 0 -0.3 with 300? v os degradation 1.7 1.7
MAX478/max479 17? max, dual/quad, single-supply, precision op amps 6 _______________________________________________________________________________________ electrical characteristics: ?5v (v s = ?5v, t a = +25?, unless otherwise noted.) parameter symbol conditions MAX478ac max479ac min typ max MAX478c/e max479c/e min typ max units input voltage range v in (cm) upper limit 13.5 13.9 13.5 13.9 v lower limit -15.0 -15.3 input offset current i os -15.0 -15.3 0.05 0.25 0.05 0.35 na input bias current i b 35 36 na common-mode rejection ratio cmrr v cm = +13.5v, -15v 97 106 94 106 db slew rate sr a v = +1v, c l = 15pf power-supply rejection ratio psrr v s = 5v, 0v to ?8v 96 112 94 112 db 0.02 0.04 0.02 0.04 v/? 16 21 17 25 gain-bandwidth product gbw f o 5khz 85 85 khz input offset voltage v os 80 350 100 480 ? i s supply current per amplifer ? large-signal voltage gain a vol v o = ?0v, r l = 50k 300 1200 250 1000 v/mv v o = ?0v, no load 600 2500 400 2500 output voltage swing v out r l = 50k ?3.0 ?4.2 ?3.0 ?4.2 v r l = 2k ?1.0 ?2.7 ?1.0 ?2.7
MAX478/max479 17? max, dual/quad, single-supply, precision op amps _______________________________________________________________________________________ 7 electrical characteristics: ?5v (v s = ?5v, t a = 0? to +70?, unless otherwise noted.) parameter symbol conditions MAX478ac max479ac min typ max MAX478c max479c min typ max units i s supply current per amplifer max47_acp/cp (note 1) 0.6 2.8 0.7 4.0 input offset-voltage drift d v os d t max47_cs (note 1) 0.9 5.5 ?/? large-signal voltage gain a vol v o = ?0v, r l = 50k 200 800 150 750 v/mv ? power-supply rejection ratio psrr v s = 5v, 0v to ?8v 93 110 91 110 db input offset voltage v os 100 480 130 660 17 24 18 28 ? input bias current i b 36 37 na common-mode rejection ratio cmrr v cm = +13v, -15v 94 104 91 104 db output voltage swing v out r l = 5k ?1.0 ?3.5 11.0 ?3.5 v input offset current i os 0.06 0.35 0.06 0.35 na
MAX478/max479 17? max, dual/quad, single-supply, precision op amps 8 _______________________________________________________________________________________ electrical characteristics: ?5v (v s = ?5v, t a = -40? to +85?, unless otherwise noted.) note 1: guaranteed by design. note 2: power-supply rejection ratio is measured at the minimum supply voltage. the op amps actually work at 1.7v supply, but with additional input offset-voltage skew. parameter symbol conditions MAX478ep max479ep min typ max MAX478es max479es min typ max units output voltage swing v out r l = 5k ?1.0 ?3.5 ?1.0 ?3.5 v common-mode rejection ratio cmrr v cm = +13v, -14.9v 88 103 88 103 db i s supply current per amplifer input offset current i os (note 1) 0.7 4.0 0.9 5.5 input offset-voltage drift d v os d t ?/? large-signal voltage gain a vol v o = ?0v, r l = 50k 100 500 100 500 v/mv input bias current ? 0.07 0.70 0.07 0.70 na i b power-supply rejection ratio psrr v s = 5v, 0v to ?8v 88 109 88 109 db input offset voltage v os 48 48 na 130 740 130 740 19 30 19 30 ?
MAX478/max479 17? max, dual/quad, single-supply, precision op amps _________________________________________________________________________________________________ 9 __________________________________________typical operating characteristics 20 -50 75 supply current vs. temperature 14 temperature (?) supply current per amplifier ( m a) 16 -25 25 18 50 0 v s = 15v v s = 5v, 0v v s = 1.5v 12 10 100 100 -500 0 minimum supply voltage -400 0 positive supply voltage (v) offset-voltage shift ( m v) 3 -200 -300 12 -100 +25? +85? -40? non-functional 140 -20 0.001 100k voltage gain vs. frequency 20 frequency (hz) voltage gain (db) 1k 60 0.1 10 100 t a = +25? v s = 15v v s = 5v, 0v 120 80 40 0 30 10k gain, phase vs. frequency 20 frequency (hz) voltage gain (db) 0 -10 100k 1m 10 t a = +25? phase shift (degrees) 80 120 200 240 160 phase 15v phase 5v, 0v gain 15v gain 5v, 0v 120 1 100k common-mode rejection ratio vs. frequency 0 frequency (hz) cmrr (db) 40 10 1k 80 t a = +25? v s = 5v, 0v 10k 100 v s = 15v 120 0.1 100k power-supply rejection ratio vs. frequency 0 frequency (hz) psrr (db) 40 11k 80 10k 100 positive supply negative supply v s = 2.5v + 1v p-p sine wave t a = +25? 10 120 0 100 40 capacitive load (pf) overshoot (%) 1000 10 80 10,000 capacitive load handling v s = 5v, 0v t a = +25? a v = +1 a v = +5 a v = +10 100 60 20 1000 0.1 0 output saturation vs. temperature 10 temperature (?) saturation voltage (mv) 50 -50 100 100 1 i sink = 1ma i sink = 100 m a i sink = 1 m a no load 2k w to ground v s = 5v, 0v -25 25 75 10k w to ground 10m 10k 100k voltage gain vs. load resistance 100k load resistance to ground ( w ) voltage gain (v/v) 1m 10k 1m 10m v s = 15v, t a = +25? v s = 5v, 0v, t a = +25? v s = 5v, 0v, t a = +85?
MAX478/max479 17? max, dual/quad, single-supply, precision op amps 10 _______________________________________________________________________________________________ 1000 10 0.1 1 1k noise spectrum 100 frequency (hz) voltage noise density (nv/ ? hz ) current noise density (fa/ ? hz ) 30 300 10 100 current noise 1/f corner 0.5hz voltage noise v s = 2.5v t a = +25? 20 -30 0 short-circuit current 10 time from output short to ground (minutes) short-circuit current (ma) -10 -20 1 0 sinking sourcing 2 v s = 5v, 0v v s = 15v v s = 2.5v v s = 2.5v v s = 15v 100 -4.0 -50 input bias and offset current vs. temperature temperature (?) input bias current (na) 100 -2.5 -25 0 50 75 25 -3.0 -3.5 25 50 75 input offset current (pa) v s = 5v, 0v i os i b ____________________________typical operating characteristics (continued) large-signal transient response v s = ?5v time (500?/div) a v = +1, c l = 15pf large-signal transient response v s = 5v, 0v time (100?/div) a v = +1, c l = 15pf small-signal transient response v s = ?.5v time (20?/div) a v = +1, c l = 15pf small-signal transient response v s = ?5v time (20?/div) a v = +1, c l = 15pf small-signal transient response v s = 5v, 0v time (20?/div) a v = +1, c l = 15pf output voltage (20mv/div) output voltage (20mv/div) output voltage (20mv/div) output voltage (1v/div) 100m v output voltage (5v/div) 0v 2v 0v 0v
________________________________________________________package information MAX478/max479 17? max, dual/quad, single-supply, precision op amps ______________________________________________________________________________________ 11 in+ in- r1 output low-power instrumentation amplifier 1/4max479 1/4max479 gain = (1 + 2r1 ) ( r3 ) = 100 for values shown rg r2 1/4max479 1m rg 200k r1 1m r2 1m r3 9.1m r3 9.1m r2 1m ________typical application circuit ___________________chip topograqhy outa v+ 0.111" (2.82mm) v- v+ outb ina- ina+ inb- inb+ 0.079" (2.01mm) l dim a a1 b c d e e h h l a min 0.053 0.004 0.014 0.007 0.189 0.150 0.228 0.010 0.016 0? max 0.069 0.010 0.019 0.010 0.197 0.157 0.244 0.020 0.050 8? min 1.35 0.10 0.35 0.19 4.80 3.80 5.80 0.25 0.40 0? max 1.75 0.25 0.49 0.25 5.00 4.00 6.20 0.50 1.27 8? inches millimeters a 8-pin plastic small-outline package h e d e a a1 c h x 45? 0.127mm 0.004in. b 1.27 bsc 0.050 bsc 21-325a
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. 12 __________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 (408) 737-7600 1993 maxim integrated products printed usa is a registered trademark of maxim integrated products. MAX478/max479 17? max, dual/quad, single-supply, precision op amps 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. 12 __________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 (408) 737-7600 1993 maxim integrated products printed usa is a registered trademark of maxim integrated products. __________________________________________package information (continued) l dim a a1 b c d e e h h l a min 0.053 0.004 0.014 0.007 0.337 0.150 0.228 0.010 0.016 0? max 0.069 0.010 0.019 0.010 0.344 0.157 0.244 0.020 0.050 8? min 1.35 0.10 0.35 0.19 8.55 3.80 5.80 0.25 0.40 0? max 1.75 0.25 0.49 0.25 8.75 4.00 6.20 0.50 1.27 8? inches millimeters a 14-pin plastic small-outline package h e d e a a1 c h x 45? 0.127mm 0.004in. b 1.27 bsc 0.050 bsc 21-331a c a a2 e1 d e e a e b a3 b1 b dim a a1 a2 a3 b b1 c d d1 e e1 e e a e b l a min ? 0.015 0.125 0.055 0.016 0.050 0.008 0.348 0.005 0.300 0.240 ? 0.115 0? max 0.200 ? 0.175 0.080 0.022 0.065 0.012 0.390 0.035 0.325 0.280 0.400 0.150 15? min ? 0.38 3.18 1.40 0.41 1.27 0.20 8.84 0.13 7.62 6.10 ? 2.92 0? max 5.08 ? 4.45 2.03 0.56 1.65 0.30 9.91 0.89 8.26 7.11 10.16 3.81 15? inches millimeters 2.54 bsc 7.62 bsc 0.100 bsc 0.300 bsc a1 l d1 e 21-324a a 8-pin plastic dual-in-line package

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