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30 v, micropower, overvoltage protection, rail-to-rail input/output amplifier ada4096-2 rev. 0 information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062-9106, u.s.a. tel: 781.329.4700 www.analog.com fax: 781.461.3113 ?2011 analog devices, inc. all rights reserved. features input overvoltage protection, 32 v above and below the supply rails rail-to-rail input and output swing low power: 60 a per amplifier typical unity-gain bandwidth 800 khz typical @ v sy = 15 v 550 khz typical @ v sy = 5 v 465 khz typical @ v sy = 1.5 v single-supply operation: 3 v to 30 v low offset voltage: 300 v maximum high open-loop gain: 120 db typical unity-gain stable no phase reversal qualified for automotive applications applications battery monitoring sensor conditioners portable power supply control portable instrumentation pin configurations outa 1 ?ina 2 +ina 3 ?v 4 +v 8 outb 7 ?inb 6 +inb 5 ada4096-2 top view (not to scale) 09241-001 figure 1. 8-lead, msop (rm-8) +v outb ?inb +inb ada4096-2 top view (not to scale) 3 +ina 4 ?v 1 outa 2 ?ina 6 5 8 7 notes 1. connect the exposed pad to ground. 09241-002 figure 2. 8-lead lfcsp (cp-8-10) general description the ada4096 operational amplifier features micropower operation and rail-to-rail input and output ranges. the extremely low power requirements and guaranteed operation from 3 v to 30 v make these amplifiers perfectly suited to monitor battery usage and to control battery charging. their dynamic performance, including 27 nv/hz voltage noise density, recommends them for battery-powered audio applica- tions. capacitive loads to 200 pf are handled without oscillation. the ada4096 -2 has overvoltage protection inputs and diodes that allow the voltage input to extend 32 v above and below the supply rails, making this device ideal for robust industrial applications. the ada4096 -2 features a unique input stage that allows the input voltage to exceed either supply safely without any phase reversal or latch-up; this is called overvoltage protection, or ovp. the dual ada4096 -2 is available in 8-lead lfcsp (2 mm 2 mm) and 8-lead msop packages. the ada409x family is specified over the extended industrial temperature range (?40c to +125c) and is part of the growing selection of 30 v, low power op amps from analog devices, inc. (see table 1 ). table 1. low power, 30 v operational amplifiers op amp rail-to-rail i/o pjfet low noise dual ada4091-2 ad8682 ad8622 quad ada4091-4 ad8684 ad8624
ada4096-2 rev. 0 | page 2 of 20 table of contents features .............................................................................................. 1 applications....................................................................................... 1 pin configurations ........................................................................... 1 general description ......................................................................... 1 revision history ............................................................................... 2 specifications..................................................................................... 3 electrical specifications............................................................... 3 absolute maximum ratings............................................................ 7 thermal resistance ...................................................................... 7 esd caution.................................................................................. 7 typical performance characteristics ............................................. 8 1.5 v characteristics.................................................................. 8 5 v characteristics................................................................... 10 15 v characteristics ................................................................ 12 comparative voltage and variable voltage graphs............... 14 theory of operation ...................................................................... 15 input stage................................................................................... 15 phase inversion........................................................................... 15 input overvoltage protection ................................................... 16 comparator operation.............................................................. 17 outline dimensions ....................................................................... 18 ordering guide .......................................................................... 19 automotive products ................................................................. 19 revision history 7/11revision 0: initial version
ada4096-2 rev. 0 | page 3 of 20 specifications electrical specifications, v sy = 1.5 v v sy = 1.5 v, v cm = v sy /2, t a = 25c, unless otherwise noted. table 2. parameter symbol test conditions/comments min typ max unit input characteristics offset voltage v os 35 300 v 0c t a +125c 450 v ?40c t a +125c 900 v offset voltage drift ?v os /?t ?40c t a +125c 1 v/c input bias current i b 10 15 na ?40c t a +125c 16 na input offset current i os 0.1 1.5 na ?40c t a +125c 3 na input voltage range ?1.5 +1.5 v common-mode rejection ratio cmrr v cm = 0 v to 1.5 v 63 77 db ?40c t a +125c 58 db large signal voltage gain a vo r l = 10 k, v o = ?1.4 v to +1.4 v 92 94 db ?40c t a +125c 84 db r l = 2 k, v o = ?1.3 v to +1.3 v 86 92 db ?40c t a +125c 77 db matching characteristics offset voltage t a = 25c 100 300 v output characteristics output voltage high v oh r l = 10 k to gnd 1.48 1.49 v ?40c t a +125c 1.45 v r l = 2 k to gnd 1.45 1.46 v ?40c to +125c 1.40 v output voltage low v ol r l = 10 k to gnd ?1.49 ?1.48 v ?40c t a +125c ?1.45 v r l = 2 k to gnd ?1.48 ?1.47 v ?40c t a +125c ?1.40 v short-circuit limit i sc source/sink 10 ma closed-loop impedance z out f = 100 khz, a v = 1 102 power supply power supply rejection ratio psrr v sy = 3 v to 36 v 100 db ?40c t a +125c 90 db supply current per amplifier i sy v o = v sy /2 40 a ?40c t a +125c 80 a dynamic performance slew rate sr r l = 100 k, c l = 30 pf 0.25 v/s gain bandwidth product gbp v in = 5 mv p-p, r l = 10 k, a v = 100 501 khz unity-gain crossover ugc v in = 5 mv p-p, r l = 10 k, a v = 1 465 khz phase margin m 51 degrees ?3 db closed-loop bandwidth ?3 db a v = 1, v in = 5 mv p-p 97 khz noise performance voltage noise e n p-p 0.1 hz to 10 hz 0.7 v p-p voltage noise density e n f = 1 khz 27 nv/hz current noise density i n f = 1 khz 0.2 pa/hz
ada4096-2 rev. 0 | page 4 of 20 electrical specifications, v sy = 5 v v sy = 5.0 v, v cm = v sy /2, t a = 25c, unless otherwise noted. table 3. parameter symbol test conditions/comments min typ max unit input characteristics offset voltage v os 35 300 v ?40c t a +125c 500 v offset voltage drift ?v os /?t 1 v/c input bias current i b 10 15 na ?40c t a +125c 19 na input offset current i os 1.5 2 na ?40c t a +125c 3 na input voltage range ?5 +5 v common-mode rejection ratio cmrr v cm = ?5 v to +5 v 73 86 db ?40c t a +125c 68 db v cm = ?3 v to +3 v 91 103 db ?40c t a +125c 85 db large signal voltage gain a vo r l = 10 k, v o = 4.8 v 102 111 db ?40c t a +125c 99 db r l = 2 k, v o = 4.7 v 94 103 db ?40c t a +125c 88 db matching characteristics offset voltage t a = 25c 100 300 v output characteristics output voltage high v oh r l = 10 k to gnd 4.96 4.97 v ?40c t a +125c 4.95 v r l = 2 k to gnd 4.80 4.90 v ?40c t a +125c 4.70 v output voltage low v ol r l = 10 k to gnd ?4.98 ?4.97 v ?40c t a +125c ?4.95 v r l = 2 k to gnd ?4.90 ?4.80 v ?40c t a +125c ?4.75 v short-circuit limit i sc source/sink 10 ma closed-loop impedance z out f = 100 khz, a v = 1 71 power supply power supply rejection ratio psrr v sy = 3 v to 36 v 100 db ?40c t a +125c 90 db supply current per amplifier i sy v o = v sy /2 47 55 a ?40c t a +125c 75 a dynamic performance slew rate sr r l = 100 k, c l = 30 pf 0.3 v/s gain bandwidth product gbp v in = 5 mv p-p, r l = 10 k, a v = 100 595 khz unity-gain crossover ugc v in = 5 mv p-p, r l = 10 k, a v = 1 550 khz phase margin m 52 degrees ?3 db closed-loop bandwidth ?3 db a v = 1, v in = 5 mv p-p 114 khz noise performance voltage noise e n p-p 0.1 hz to 10 hz 0.7 v p-p voltage noise density e n f = 1 khz 27 nv/hz current noise density i n f = 1 khz 0.2 pa/hz
ada4096-2 rev. 0 | page 5 of 20 electrical specifications, v sy = 15 v v sy = 15.0 v, v cm = v sy /2, v o = 0.0 v, t a = 25c, unless otherwise noted. table 4. parameter symbol test conditions/comments min typ max unit input characteristics offset voltage v os 35 300 v ?40c t a +125c 500 v offset voltage drift ?v os /?t 1 v/c input bias current i b 3 10 na ?40c t a +125c 15 na input offset current i os 0.1 1.5 na ?40c t a +125c 3 na input voltage range ?15 +15 v common-mode rejection ratio cmrr v cm = ?15 v to +15 v 82 95 db ?40c t a +125c 75 db v cm = ?13 v to +13 v 95 107 db ?40c t a +125c 89 db large signal voltage gain a vo r l = 10 k, v o = 14.7 v 110 120 db ?40c t a +125c 105 db r l = 2 k, v o = 11 v 100 112 db ?40c t a +125c 90 db input capacitance differential mode c dm 2.5 pf common mode c cm 7 pf matching characteristics offset voltage t a = 25c 100 300 v output characteristics output voltage high v oh r l = 10 k to gnd 14.92 14.94 v ?40c t a +125c 14.90 v r l = 2 k to gnd 14.0 14.3 v ?40c t a +125c 12.0 v output voltage low v ol r l = 10 k to gnd ?14.96 ?14.80 v ?40c t a +125c ?14.75 v r l = 2 k to gnd ?14.75 ?14.65 v ?40c t a +125c ?14.0 v short-circuit limit i sc source/sink 10 ma closed-loop impedance z out f = 100 khz, a v = 1 40 power supply power supply rejection ratio psrr v sy = 3 v to 36 v 100 db ?40c t a +125c 90 db supply current per amplifier i sy v o = v sy /2 60 75 a ?40c t a +125c 100 a dynamic performance slew rate sr r l = 100 k, c l = 30 pf 0.4 v/s settling time t s to 0.1%, 10 v step 23.4 s gain bandwidth product gbp v in = 5 mv p-p, r l = 10 k, a v = 100 786 khz unity-gain crossover ugc v in = 5 mv p-p, r l = 10 k, a v = 1 800 khz phase margin m 60 degrees ?3 db closed-loop bandwidth ?3 db a v = 1, v in = 5 mv p-p 152 khz channel separation cs f = 1 khz 100 db
ada4096-2 rev. 0 | page 6 of 20 parameter symbol test conditions/comments min typ max unit noise performance voltage noise e n p-p 0.1 hz to 10 hz 0.7 v p-p voltage noise density e n f = 1 khz 27 nv/hz current noise density i n f = 1 khz 0.2 pa/hz
ada4096-2 rev. 0 | page 7 of 20 absolute maximum ratings table 5. parameter rating supply voltage 36 v input voltage operating condition ?v v in +v overvoltage condition 1 (?v) ? 32 v v in (+v) + 32 v differential input voltage 2 v sy input current 5 ma output short-circuit duration to gnd indefinite storage temperature range ?65c to +150c operating temperature range ?40c to +125c junction temperature range ?65c to +150c lead temperature (soldering, 60 sec) 300c 1 performance not guaranteed during overvoltage conditions. 2 limit the input current to 5 ma. stresses above those listed under absolute maximum ratings may cause permanent damage to the device. this is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. thermal resistance ja is specified for the device soldered on a 4-layer jedec standard printed circuit board (pcb) with zero airflow. the exposed pad is soldered to the application board. table 6. thermal resistance package type ja jc unit 8-lead msop (rm-8) 142 45 c/w 8-lead lfcsp (cp-8-10) 76 43 c/w esd caution
ada4096-2 rev. 0 | page 8 of 20 typical performance characteristics t a = 25c, unless otherwise noted. 1.5 v characteristics 180 0 20 40 60 80 100 120 140 160 ?200 ?175 ?150 ?125 ?100 ?75 ?50 ?25 0 25 50 75 100 125 150 175 200 more number of amplifiers v os (v) ada4096-2 v sy = 1.5v t a = 25c 09241-003 figure 3. input offset voltage distribution 25 20 15 10 5 0 ?2.5 ?2.0 ?1.5 ?1.0 ?0.5 0 0.5 1.0 1.5 2.0 2.5 number of amplifiers tcv os (v/c) ada4096-2 v sy = 1.5v t a = ?40c to +125c 09241-004 figure 4. offset voltage drift distribution 30 ?1.5 ?1.0 ?0.5 0 0.5 1.0 1.5 ?40 ?30 ?20 ?10 0 10 20 i b (na) v cm (v) ada4096-2 v sy = 1.5v t a = 0c t a = +25c t a = +85c t a = +125c t a = ?40c 09241-005 figure 5. input bias current vs. v cm and temperature 10k 1k 100 0.001 0.01 0.1 1 10 100 10 1 v out to rail (mv) load current (ma) ada4096-2 v sy = 1.5v t a = 25c sourcing sinking 09241-006 figure 6. dropout voltage vs. load current 140 120 100 80 60 40 20 0 ?20 ?40 100 1k 10k 100k 1m 10m ?60 200 150 100 50 0 ?50 ?100 gain (db) phase (degrees) frequency (hz) ada4096-2 v sy = 1.5v t a = 25c gain phase 09241-007 figure 7. open-loop gain and phase vs. frequency 50 40 30 20 10 0 ?10 ?20 ?30 ?40 10 100 1k 10k 100k 1m 10m ?50 closed-loop gain (db) frequency (hz) ada4096-2 v sy = 1.5v t a = 25c g = +100 g = +10 g = +1 09241-008 figure 8. closed-loop gain vs. frequency
ada4096-2 rev. 0 | page 9 of 20 10k 1k 100 10 1 0.1 10 100 1k 10k 100k 1m 10m 0.01 z out ( ? ) frequency (hz) ada4096-2 v sy = 1.5v t a = 25c g = +100 g = +10 g = +1 09241-009 figure 9. output im pedance vs. frequency 120 100 80 60 40 20 0 10 100 1k 10k 100k 1m 10m ?20 psrr (db) frequency (hz) ada4096-2 v sy = 1.5v t a = 25c psrr? psrr+ 09241-052 figure 10. psrr vs. frequency 2.0 0 20406080100120 ?2.0 ?1.5 ?1.0 ?0.5 0 0.5 1.0 1.5 v out (v) time (s) ada4096-2 v sy = 1.5v t a = 25c r l = 10k ? c l = 100pf g = +1 09241-010 figure 11. large signal transient response 0.08 0 5 10 15 20 25 30 ?0.10 ?0.08 ?0.06 ?0.02 ?0.04 0 0.02 0.04 0.06 v out (v) time (s) ada4096-2 v sy = 1.5v t a = 25c r l = 10k ? c l = 100pf g = +1 09241-011 figure 12. small signal transient response 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 20406080100 0 v out (v) time (s) ada4096-2 v sy = 1.5v t a = 25c r f = 10k ? r s = 100 ? 09241-055 figure 13. positive overload recovery 0.2 0 20406080100 ?1.6 ?1.4 ?1.2 ?1.0 ?0.8 ?0.6 ?0.4 ?0.2 0 v out (v) time (s) ada4096-2 v sy = 1.5v t a = 25c r f = 10k ? r s = 100 ? 09241-056 figure 14. negative overload recovery
ada4096-2 rev. 0 | page 10 of 20 5 v characteristics 250 200 150 100 50 0 ?200 ?175 ?150 ?125 ?100 ?75 ?50 ?25 0 25 50 75 100 125 150 175 200 more number of amplifiers v os (v) ada4096-2 v sy = 5v t a = 25c 09241-015 figure 15. input offset voltage distribution 40 20 25 30 35 15 10 5 0 ?2.5 ?2.0 ?1.5 ?1.0 ?0.5 0 0.5 1.0 1.5 2.0 2.5 number of amplifiers tcv os (v/c) ada4096-2 v sy = 5v t a = ?40c to +125c 09241-016 figure 16. offset voltage drift distribution 30 ?5?4?3?2?1012345 ?50 ?40 ?30 ?20 ?10 0 10 20 i b (na) v cm (v) ada4096-2 v sy = 5v t a = 0c t a = +25c t a = +85c t a = +125c t a = ?40c 09241-050 figure 17. input bias current vs. v cm and temperature 10k 1k 100 0.001 0.01 0.1 1 10 100 10 1 v out to rail (mv) load current (ma) ada4096-2 v sy = 5v t a = 25c sourcing sinking 09241-023 figure 18. dropout voltage vs. load current 140 120 100 80 60 40 20 0 ?20 ?40 100 1k 10k 100k 1m 10m ?60 200 150 100 50 0 ?50 ?100 gain (db) phase (degrees) frequency (hz) ada4096-2 v sy = 5v t a = 25c gain phase 09241-020 figure 19. open-loop gain and phase vs. frequency 50 40 30 20 10 0 ?10 ?20 ?30 ?40 10 100 1k 10k 100k 1m 10m ?50 closed-loop gain (db) frequency (hz) ada4096-2 v sy = 5v t a = 25c g = +100 g = +10 g = +1 09241-024 figure 20. closed-loop gain vs. frequency
ada4096-2 rev. 0 | page 11 of 20 10k 1k 100 10 1 0.1 10 100 1k 10k 100k 1m 10m 0.01 z out ( ? ) frequency (hz) ada4096-2 v sy = 5v t a = 25c g = +100 g = +10 g = +1 09241-021 figure 21. output im pedance vs. frequency 140 120 100 80 60 40 20 0 10 100 1k 10k 100k 1m 10m ?20 psrr (db) frequency (hz) ada4096-2 v sy = 5v t a = 25c psrr? psrr+ 09241-053 figure 22. psrr vs. frequency 6 0 50 100 150 200 250 300 350 400 ?6 ?4 ?2 0 2 4 v out (v) time (s) ada4096-2 v sy = 5v t a = 25c r l = 10k ? c l = 100pf g = +1 09241-017 figure 23. large signal transient response 0.08 0 5 10 15 20 25 30 ?0.10 ?0.08 ?0.06 ?0.02 ?0.04 0 0.02 0.04 0.06 v out (v) time (s) ada4096-2 v sy = 5v t a = 25c r l = 10k ? c l = 100pf g = +1 09241-018 figure 24. small signal transient response 6 5 4 3 2 1 0 20406080100 0 v out (v) time (s) ada4096-2 v sy = 5v t a = 25c r f = 10k ? r s = 100 ? 09241-057 figure 25. positive overload recovery 1 0 ?1 ?2 ?3 ?4 0 20406080100 ?5 v out (v) time (s) ada4096-2 v sy = 5v t a = 25c r f = 10k ? r s = 100 ? 09241-058 figure 26. negative overload recovery
ada4096-2 rev. 0 | page 12 of 20 15 v characteristics 250 200 150 100 50 0 ?200 ?175 ?150 ?125 ?100 ?75 ?50 ?25 0 25 50 75 100 125 150 175 200 more number of amplifiers v os (v) ada4096-2 v sy = 15v t a = 25c 09241-027 figure 27. input offset voltage distribution 35 20 25 30 15 10 5 0 ?2.5 ?2.0 ?1.5 ?1.0 ?0.5 0 0.5 1.0 1.5 2.0 2.5 number of amplifiers tcv os (v/c) ada4096-2 v sy = 15v t a = ?40c to +125c 09241-028 figure 28. offset voltage drift distribution 40 30 ?15 ?10 ?5 0 5 10 15 ?60 ?50 ?40 ?30 ?20 ?10 0 10 20 i b (na) v cm (v) ada4096-2 v sy = 15v t a = 0c t a = +25c t a = +85c t a = +125c t a = ?40c 09241-051 figure 29. input bias current vs. v cm and temperature 10k 1k 100 0.001 0.01 0.1 1 10 100 10 1 v out to rail (mv) load current (ma) ada4096-2 v sy = 15v t a = 25c sourcing sinking 09241-034 figure 30. dropout voltage vs. load current 140 120 100 80 60 40 20 0 ?20 ?40 100 1k 10k 100k 1m 10m ?60 200 150 100 50 0 ?50 ?100 gain (db) phase (degrees) frequency (hz) ada4096-2 v sy = 15v t a = 25c gain phase 09241-030 figure 31. open-loop gain and phase vs. frequency 50 40 30 20 10 0 ?10 ?20 ?30 10 100 1k 10k 100k 1m 10m ?40 closed-loop gain (db) frequency (hz) ada4096-2 v sy = 15v t a = 25c g = +100 g = +10 g = +1 09241-036 figure 32. closed-loop gain vs. frequency
ada4096-2 rev. 0 | page 13 of 20 10k 1k 100 10 1 0.1 10 100 1k 10k 100k 1m 10m 0.01 z out ( ? ) frequency (hz) ada4096-2 v sy = 15v t a = 25c g = +100 g = +10 g = +1 09241-035 figure 33. output im pedance vs. frequency 120 100 80 60 40 20 0 10 100 1k 10k 100k 1m 10m ?20 psrr (db) frequency (hz) ada4096-2 v sy = 15v t a = 25c psrr? psrr+ 09241-054 figure 34. psrr vs. frequency 15 0 50 100 150 200 250 300 350 400 ?15 ?10 ?5 0 5 10 v out (v) time (s) ada4096-2 v sy = 15v t a = 25c r l = 10k ? c l = 100pf g = +1 09241-031 figure 35. large signal transient response 0.08 0 5 10 15 20 25 30 ?0.10 ?0.08 ?0.06 ?0.02 ?0.04 0 0.02 0.04 0.06 v out (v) time (s) ada4096-2 v sy = 15v t a = 25c r l = 10k ? c l = 100pf g = +1 09241-032 figure 36. small signal transient response 16 12 14 10 8 6 4 2 0 20406080100 0 v out (v) time (s) ada4096-2 v sy = 15v t a = 25c r f = 10k ? r s = 100 ? 09241-059 figure 37. positive overload recovery 0 ?4 ?2 ?6 ?8 ?10 ?12 ?14 0 20406080100 ?16 v out (v) time (s) ada4096-2 v sy = 15v t a = 25c r f = 10k ? r s = 100 ? 09241-060 figure 38. negative overload recovery
ada4096-2 rev. 0 | page 14 of 20 comparative voltage and variable voltage graphs 0.5 0.4 0.3 0.2 0.1 0 ?0.1 ?0.2 ?0.3 ?10 ?8 ?6 ?4 ?2 0 2 4 6 8 10 ?0.4 noise (v) time (s) ada4096-2 v sy = 15v t a = 25c 09241-039 figure 39. input voltage noise, 0.1 hz to 10 hz bandwidth ? 80 20 100 1k 10k 50k ?140 ?130 ?120 ?110 ?100 ?90 channel separation (db) frequency (hz) ada4096-2 v sy = 15v t a = 25c 09241-040 2k? 10k ? 1k? v in = 10v p-p figure 40. channel separation vs. frequency 120 110 100 90 80 70 60 50 40 30 100 1k 10k 100k 1m 10m 20 cmrr (db) frequency (hz) ada4096-2 t a = 25c v sy = 15v v sy = 1.5v v sy = 5v 09241-041 figure 41. cmrr vs. frequency 70 60 50 40 30 20 10 03 322824201612 84 0 supply current per amplifier (a) supply voltage (v) 6 ada4096-2 t a = 25c r l = 09241-043 figure 42. supply current vs. supply voltage 100 0.1 1k 100 10 1 10 e n (nv/ hz) frequency (hz) ada4096-2 v sy = 15v t a = 25c 09241-044 figure 43. voltage noise density 50 0.01 1 0.1 0 10 20 30 40 overshoot (%) c load (nf) ada4096-2 v sy = 15v t a = 25c r l = 2k ? g = +1 v in = 100mv p-p 09241-100 os? os+ figure 44. overshoot vs. load capacitance
ada4096-2 rev. 0 | page 15 of 20 theory of operation input stage 09241-045 r6 v cc +in ?in v ee ovp ovp ou t r7 d10 q20 q19 d11 q16 d7 q15 d8 q14 q17 q10 q13 q18 d9 1 i3 r2 r1 r3 r4 c2 q12 d6 r5 q9 q11 q6 q8 q7 q5 q4 q3 q1 q2 i2 i1 c1 d3 d1 d4 d2 figure 45. simpli fied schematic figure 45 shows a simplified schematic of the ada4096-2 . the input stage comprises two differential pairs (q1 to q4 and q5 to q8) operating in parallel. when the input common-mode voltage approaches v cc ? 1.5 v, q1 to q4 shut down as i1 reaches its minimum voltage compliance. conversely, when the input common-mode voltage approaches v ee + 1.5 v, q5 to q8 shut down as i2 reaches its minimum voltage compliance. this topology allows for maximum input dynamic range because the amplifier can function with its inputs at 200 mv outside the rail (at room temperature). as with any rail-to-rail input amplifier, v os mismatch between the two input pairs determines the cmrr of the amplifier. if the input common-mode voltage range is kept within 1.5 v of each rail, transitions between the input pairs are avoided, thus improving the cmrr by approximately 10 db (see table 3 and table 4 ). phase inversion some single-supply amplifiers exhibit phase inversion when the input signal extends beyond the common-mode voltage range of the amplifier. when the input devices become saturated, the inverting and noninverting inputs exchange functions, causing the output to move in the opposing direction. although phase inversion persists for only as long as the inputs are saturated, it can be detrimental to applications where the amplifier is part of a closed-loop system. the ada4096-2 is free from phase inversion over the entire common-mode voltage range, as well as the overvoltage protected range stated in the absolute maximum ratings section, table 5 . figure 46 shows the ada4096-2 in a unity-gain configuration with the input signal at 40 v and the amplifier supplies at 10 v. ch1 10.0v ch2 10.0v m2.00ms a ch1 ?3.6v t 34.20% 1 t 09241-046 figure 46. no phase reversal
ada4096-2 rev. 0 | page 16 of 20 input overvoltage protection the ada4096-2 inputs are protected from input voltage excursions up to 32 v outside each rail. this feature is of particular importance in applications with power supply sequencing issues that could cause the signal source to be active before the supplies to the amplifier. figure 47 shows the input current limiting capability of the ada4096-2 (green curves) compared to using a 5 k series resistor (red curves). 7 ?48 ?40 ?32 ?24 ?16 ?8 0 8 16 24 32 40 48 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 2 3 4 5 6 input bias current (ma) v in (v) v ee = ?15v v ee = 0v v cc = +15v low rds on series fet 5k? series resistor 09241-047 figure 47. input current limiting capability figure 47 was generated with the ada4096 -2 in a buffer configu- ration with the supplies connected to gnd (or 15 v) and the positive input swept until it exceeds the supplies by 32 v. in general, input current is limited to 1 ma during positive overvoltage con- ditions and 200 a during negative undervoltage conditions. for example, at an overvoltage of 20 v, the ada4096 -2 input current is limited to 1 ma, providing a current limit equivalent to a series 20 k resistor. figure 47 also shows that the current limiting circuitry is active whether the amplifier is powered or not. note that figure 47 represents input protection under abnormal conditions only. the correct amplifier operation input voltage range (ivr) is specified in table 2 to table 4 .
ada4096-2 rev. 0 | page 17 of 20 comparator operation although op amps are quite different from comparators, occasionally an unused section of a dual or a quad op amp may be pressed into service as a comparator; however, this is not recommended for any rail-to-rail output op amps. for rail- to-rail output op amps, the output stage is generally a ratioed current mirror with bipolar or mosfet transistors. with the part operating open loop, the second stage increases the current drive to the ratioed mirror to close the loop, but it cannot, which results in an increase in supply current. with the op amp configured as a comparator, the supply current can be significantly higher (see figure 48 ). 500 400 300 200 100 03 322824201612 84 0 supply current per amplifier (a) supply voltage (v) 6 v out = high v out = low buffer 09241-048 figure 48. comparator supply current
ada4096-2 rev. 0 | page 18 of 20 outline dimensions compliant to jedec standards mo-187-aa 6 0 0.80 0.55 0.40 4 8 1 5 0.65 bsc 0.40 0.25 1.10 max 3.20 3.00 2.80 coplanarity 0.10 0.23 0.09 3.20 3.00 2.80 5.15 4.90 4.65 pin 1 identifier 15 max 0.95 0.85 0.75 0.15 0.05 10-07-2009-b figure 49. 8-lead mini small outline package [msop] (rm-8) dimensions shown in millimeters 1.70 1.60 1.50 0.425 0.350 0.275 063009-a top view 8 1 5 4 0.30 0.25 0.20 bottom view pin 1 index area 2.00 bsc sq seating plane 0.60 0.55 0.50 1.10 1.00 0.90 0.20 ref 0.05 max 0.02 nom 0.50 bsc exposed pad p i n 1 i n d i c a t o r ( r 0 . 1 5 ) for proper connection of the exposed pad, refer to the pin configuration and function descriptions section of this data sheet. figure 50. 8-lead lead frame chip scale package [lfcsp_ud] 2 mm 2 mm body, ultra thin, dual lead (cp-8-10) dimensions shown in millimeters
ada4096-2 rev. 0 | page 19 of 20 ordering guide model 1 , 2 temperature range package description package option branding ada4096-2armz ?40c to +125c 8-lead mini small outline package [msop] rm-8 a2t ada4096-2armz-r7 ?40c to +125c 8-lead mini small outline package [msop] rm-8 a2t ada4096-2armz-rl ?40c to +125c 8-lead mini small outline package [msop] rm-8 a2t ada4096-2acpz-r7 ?40c to +125c 8-lead frame chip scale package [lfcsp_ud] cp-8-10 a4 ada4096-2acpz-rl ?40c to +125c 8-lead frame chip scale package [lfcsp_ud] cp-8-10 a4 ada4096-2warmz-r7 ?40c to +125c 8-lead mini small outline package [msop] rm-8 a2t ada4096-2warmz-rl ?40c to +125c 8-lead mini small outline package [msop] rm-8 a2t 1 z = rohs compliant part. 2 w = qualified for auto motive applications. automotive products the ada4096-2w models are available with controlled manufacturing to support the quality and reliability requirements of automo tive applications. note that these automotive models may have specifications that differ from the commercial models; therefore, desi gners should review the specifications section of this data sheet carefully. only the automotive grade products shown are available f or use in automotive applications. contact your local analog devices account representative for specific product ordering information and to obtain the specific automotive reliability reports for these models.
ada4096-2 rev. 0 | page 20 of 20 notes ?2011 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d09241-0-7/11(0)

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