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low power, 3.6 mhz, low noise, rail-to- rail output, operational amplifiers ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d 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 ?2009C2010 analog devices, inc. all rights reserved. features low power: 180 a typical very low input bias currents: 0.5 pa typical low noise: 16 nv/hz typical 3.6 mhz bandwidth offset voltage: 500 v typical low offset voltage drift: 4 v/c maximum low distortion: 0.003% thd + n 2.7 v to 5 v single supply or 1.35 v to 2.5 v dual supply available in very small 2 mm 2 mm lfcsp packages applications photodiode amplifiers sensor amplifiers portable medical and instrumentation portable audio: mp3s, pdas, and smartphones communications low-side current sense adc drivers active filters sample-and-hold general description the ada4691-2/ada4692-2 are dual and the ada4691-4/ ada4692-4 are the quad rail-to-rail output, single-supply amplifiers featuring low power, wide bandwidth, and low noise. the ada4691-2 has two independent shutdown pins, allowing further reduction in supply current. the ada4691-4 is a quad with dual shutdown pins each controlling a pair of amplifiers and is available in the 16-lead lfcsp. the ada4692-4 is a quad version without shutdown. these amplifiers are ideal for a wide variety of applications. audio, filters, photodiode amplifiers, and charge amplifiers, all benefit from this combination of performance and features. additional applications for these amplifiers include portable consumer audio players with low noise and low distortion that provide high gain and slew rate response over the audio band at low power. industrial applications with high impedance sensors, such as pyroelectric and ir sensors, benefit from the high impedance and low 0.5 pa input bias, low offset drift, and enough bandwidth and response for low gain applications. the ada4691/ada4692 family is fully specified over the extended industrial temperature range (?40c to +125c). the ada4691-2 is available in a 10-lead lfcsp and a 9-ball wlcsp. the ada4692-2 is available in an 8-lead soic and 8-lead lfcsp. the ada4691-4 is available in a 16-lead lfcsp. the ada4692-4 is available in a 14-lead tssop. for pin configurations, see the pin configurations section. 1 0.1 0.01 0.001 10 100 1k 10k 20k thd + n (%) frequency (hz) ada4692-2 v sy = 2.5v a v = ?1 t a = 25c 07950-142 r l = 600 ? r l = 2k ? figure 1. thd + noise vs. frequency ? 80 ?90 ?100 ?110 ?120 ?130 ?140 100 1k 10k 100k channel separation (db) frequency (hz) 07950-141 ada4692-2 v sy = 2.5v v in = 2.8v p-p a v = +1 t a = 25c figure 2. channel separation vs. frequency table 1. micropower low power low power with shutdown standard op amp with shutdown high bandwidth single ad8613 ad8591 ad8691 dual ad8617 ada4692-2 ada4691-2 ad8592 ad8692 quad ad8619 ada4692-4 ada4691-4 ad8594 ad8694
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 2 of 20 table of contents features .............................................................................................. 1 ? applications....................................................................................... 1 ? general description ......................................................................... 1 ? revision history ............................................................................... 2 ? specifications..................................................................................... 3 ? electrical characteristics2.7 v operation ............................ 3 ? electrical characteristics5 v operation................................ 4 ? absolute maximum ratings............................................................ 6 ? thermal resistance ...................................................................... 6 ? esd caution...................................................................................6 ? pin configurations ............................................................................7 ? typical performance characteristics ..............................................8 ? shutdown operation...................................................................... 16 ? input pin characteristics........................................................... 16 ? input threshold.......................................................................... 16 ? outline dimensions ....................................................................... 17 ? ordering guide .......................................................................... 20 ? revision history 11/10rev. c to rev. d changed 5 v to 6 v in endnote 2, table 4 .................................... 6 12/09rev. b to rev. c added ada4691-4, 16-lead lfcsp .......................... throughout added figure 1, figure 2, and table 1; renumbered sequentially ....................................................................................... 1 changes to applications section and general description section................................................................................................ 1 changes to table 1............................................................................ 3 changes to table 2............................................................................ 4 changes to table 4............................................................................ 6 updated outline dimensions ....................................................... 17 changes to ordering guide .......................................................... 20 9/09rev. a to rev. b added ada4691-2, 9-ball wlcsp; ada4692-2, 8-lead lfcsp; and ada4692-4, 14-lead tssop................. throughout changes to general description .................................................... 1 updated outline dimensions ....................................................... 16 changes to ordering guide .......................................................... 17 6/09rev. 0 to rev. a added ada4691-2, 10 lead lfcsp........................... throughout changes to table 1.............................................................................3 changes to table 2.............................................................................4 changes to captions for figure 40, figure 41, figure 43, and figure 44 .......................................................................................... 13 added shutdown operations section ......................................... 15 updated outline dimensions....................................................... 16 changes to ordering guide .......................................................... 16 3/09revision 0: initial version
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 3 of 20 specifications electrical characteristics2.7 v operation v sy = 2.7 v, v cm = v sy /2, t a = 25c, unless otherwise specified. table 2. parameter symbol test conditions/comments min typ max unit input characteristics offset voltage v os v cm = ?0.3 v to +1.6 v 0.5 2.5 mv dual (ada469x-2) v cm = ?0.1 v to +1.6 v; ?40c < t a < +125c 3.5 mv quad (ada469x-4) v cm = ?0.1 v to +1.6 v; ?40c < t a < +125c 4.0 mv offset voltage drift v os /t ?40c < t a < +125c 1 4 v/c input bias current i b 0.5 5 pa ?40c < t a < +125c 360 pa input offset current i os 1 8 pa ?40c < t a < +125c 225 pa input voltage range ?40c < t a < +125c ?0.3 +1.6 v common-mode rejection ratio cmrr v cm = ?0.3 v to +1.6 v 70 90 db v cm = ?0.1 v to +1.6 v; ?40c < t a < +125c 62 db large signal voltage gain a vo r l = 2 k, v out = 0.5 v to 2.2 v 90 100 db ?40c < t a < +85c 80 db ?40c < t a < +125c 63 db r l = 600 , v out = 0.5 v to 2.2 v 85 95 db input capacitance c in differential mode c indm 2.5 pf common mode c incm 7 pf logic high voltage (enabled) v ih ?40c < t a < +125c 1.6 v logic low voltage (power-down) v il ?40c < t a < +125c 0.5 v logic input current (per pin) i in ?40c < t a < +125c, 0 v v sd 2.7 v 1 a output characteristics output voltage high v oh r l = 2 k to gnd 2.65 2.67 v ?40c < t a < +125c 2.6 v r l = 600 to gnd 2.55 2.59 v ?40c < t a < +125c 2.5 v output voltage low v ol r l = 2 k to v sy 24 30 mv ?40c < t a < +125c 40 mv r l = 600 to v sy 78 95 mv ?40c < t a < +125c 130 mv short-circuit current i sc v out = v sy or gnd 15 ma closed-loop output impedance z out f = 1 mhz, a v = ?100 372 output pin leakage current ?40c < t a < +125c, shutdown active, v sd = v ss 10 na power supply power supply rejection ratio psrr v s = 2.7 v to 5.5 v 80 90 db ?40c < t a < +125c 75 db supply current per amplifier i sy v out = v sy /2 165 200 a ?40c < t a < +125c 240 a supply current shutdown mode i sd all amplifiers shut down, v sd = v ss 10 na ?40c < t a < +125c 2 a
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 4 of 20 parameter symbol test conditions/comments min typ max unit dynamic performance slew rate sr r l = 600 , c l = 20 pf, a v = +1 1.1 v/s r l = 2 k, c l = 20 pf, a v = +1 1.4 v/s settling time to 0.1% t s step = 0.5 v, r l = 2 k, 600 1 s gain bandwidth product gbp r l = 1 m, c l = 35 pf, a v = +1 3.6 mhz phase margin m r l = 1 m, c l = 35 pf, a v = +1 49 degrees turn-on/turn-off time r l = 600 1 s noise performance distortion thd + n a v = ?1, r l = 2 k, f = 1 khz, v in rms = 0.15 v rms 0.009 % a v = ?1, r l = 600 , f = 1 khz, v in rms = 0.15 v rms 0.01 % a v = +1, r l = 2 k, f = 1 khz, v in rms = 0.15 v rms 0.006 % a v = +1, r l = 600 , f = 1 khz, v in rms = 0.15 v rms 0.009 % voltage noise e n p-p f = 0.1 hz to 10 hz 3.1 v p-p voltage noise density e n f = 1 khz 16 nv/hz f = 10 khz 13 nv/hz electrical characteristics5 v operation v sy = 5 v, v cm = v sy /2, t a = 25c, unless otherwise specified. table 3. parameter symbol test conditions/comments min typ max unit input characteristics offset voltage v os v cm = ?0.3 v to +3.9 v 0.5 2.5 mv dual (ada469x-2) v cm = ?0.1 v to +3.9 v; ?40c < t a < +125c 3.5 mv quad (ada469x-4) v cm = ?0.1 v to +3.9 v; ?40c < t a < +125c 4.0 mv offset voltage drift v os /t ?40c < t a < +125c 1 4 v/c input bias current i b 0.5 5 pa ?40c < t a < +125c 360 pa input offset current i os 1 8 pa ?40c < t a < +125c 260 pa input voltage range ?40c < t a < +125c ?0.3 +3.9 v common-mode rejection ratio cmrr v cm = ?0.3 v to +3.9 v 75 98 db v cm = ?0.1 v to +3.9 v; ?40c < t a < +125c 68 db large signal voltage gain a vo r l = 2 k, v o = 0.5 v to 4.5 v, v cm = 0 v 95 110 db ?40c < t a < +85c 80 db ?40c < t a < +125c 70 db r l = 600 , v o = 0.5 v to 4.5 v, v cm = 0 v 90 100 db input capacitance differential mode c indm 2.5 pf common mode c incm 7 pf logic high voltage (enabled) v ih ?40c < t a < +125c 2.0 v logic low voltage (power-down) v il ?40c < t a < +125c 0.8 v logic input current (per pin) i in ?40c < t a < +125c, 0 v v sd 2.7 v 1 a
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 5 of 20 parameter symbol test conditions/comments min typ max unit output characteristics output voltage high v oh r l = 2 k 4.95 4.97 v ?40c t a +125c 4.90 v r l = 600 to gnd 4.85 4.88 v ?40c t a +125c 4.80 v output voltage low v ol r l = 2 k 30 35 mv ?40c t a +125c 50 mv r l = 600 100 110 mv ?40c t a +125c 155 mv short-circuit limit i sc v out = v sy or gnd 55 ma closed-loop output impedance z out ada4691-2, f = 1 mhz, a v = ?100 364 ada4691-2, f = 1 mhz, a v = ?100 246 output pin leakage current ?40c < t a < +125c, shutdown active, v sd = v ss 10 na power supply power supply rejection ratio psrr v sy = 2.7 v to 5.5 v 80 90 db ?40c t a +125c 75 db supply current per amplifier i sy v out = v sy /2 180 225 a ?40c t a +125c 275 a supply current shutdown mode i sd all amplifiers shut down, v sd = v ss 10 na ?40c t a +125c 2 a dynamic performance slew rate sr r l = 2 k, 600 , c l = 20 pf, a v = +1 1.3 v/s settling time to 0.1% t s v in = 2 v step, r l = 2 k or 600 1.5 s gain bandwidth product gbp r l = 1 m, c l = 35 pf, a v = +1 3.6 mhz phase margin m r l = 1 m, c l = 35 pf, a v = +1 52 degrees turn-on/turn-off time r l = 600 1 s noise performance distortion thd + n a v = ?1, r l = 2 k, f = 1 khz, v in rms = 0.8 v rms 0.006 % a v = ?1, r l = 600 , f = 1 khz, v in rms = 0.8 v rms 0.008 % a v = +1, r l = 2 k, f = 1 khz, v in rms = 0.8 v rms 0.001 % a v = +1, r l = 600 , f = 1 khz, v in rms = 0.8 v rms 0.003 % voltage noise e n p-p f = 0.1 hz to 10 hz 3.2 v p-p voltage noise density e n f = 1 khz 16 nv/hz e n f = 10 khz 13 nv/hz
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 6 of 20 absolute maximum ratings table 4. parameter rating supply voltage 6 v input voltage v ss ? 0.3 v to v dd + 0.3 v input current 1 10 ma shutdown pin rise/fall times 50 s maximum differential input voltage 2 v sy output short-circuit duration to gnd indefinite temperature 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 input pins have clamp diodes to the supply pins. limit the input current to 10 ma or less whenever the input signal exceeds the power supply rail by 0.3 v. 2 differential input voltage is limited to 6 v or the supply vo ltage, whichever is less. 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 worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages and measured using a standard 4-layer board, unless otherwise specified. table 5. thermal resistance package type ja jc unit 8-lead soic_n (r-8) 120 45 c/w 8-lead lfcsp (cp-8-6) 125 40 c/w 9-ball wlcsp (cb-9-3) 77 n/a 1 c/w 10-lead lfcsp (cp-10-11) 115 40 c/w 16-lead lfcsp (cp-16-22) 75 12 c/w 14-lead tssop (ru-14) 112 35 c/w 1 n/a = not applicable. esd caution
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 7 of 20 pin configurations ada4691-2 top view (ball side down) not to scale 07950-058 ball a1 corner a1 out b v+ out a ?in b sd a/b ?in a +in b v? +in a b1 c1 a2 b2 c2 a3 b3 c3 figure 3. 9-ball wafer level chip scale wlcsp (cb-9-3) 07950-002 6 7 2 1 3 +in a ?in a v? 8 +in b ?in b out b 5 sd b 4 sd a top view (not to scale) ada4691-2 10 9 out a v+ figure 4. 10-lead, 2 mm 2 mm lfcsp (cp-10-11) 07950-060 12 11 10 1 3 4 +in d v? +in c 9 ?in c +in a +in b 2 v+ ?in b 6 sd a/b 5 out b 7 sd c/d 8 out c 16 ?in a 15 out a 14 out d 13 ?in d ada4691-4 top view (not to scale) notes 1. it is recommended that the exposed pad be conncected to v?. figure 5. 16-lead, 3 mm 3 mm lfcsp (cp-16-22) top view (not to scale) ada4692-2 3 +in a 4 v? 1 out a 2 ?in a 6 ?in b 5 +in b 8v+ 7out b 07950-016 figure 6. 8-lead, 2 mm 2 mm lfcsp (cp-8-6) out a 1 ?in 2 +in 3 v? 4 v+ 8 out b 7 ?in b 6 +in b 5 ada4692-2 top view (not to scale) 07950-001 figure 7. 8-lead soic_n (r-8) 07950-059 1 2 3 4 5 6 7 ada4692-4 ?in a +in a v+ out b ?in b +in b out a 14 13 12 11 10 9 8 ?in d +in d v? out c ?in c +in c out d top view (not to scale) 1 2 3 4 5 6 7 14 13 12 11 10 9 8 top view (not to scale) figure 8. 14-lead tssop (ru-14)
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 8 of 20 typical performance characteristics t a = 25c, unless otherwise noted. 350 300 250 200 150 100 50 0 ?2.0 ?1.6 ?1.2 ?0.8 ?0.4 0 0.4 0.8 1.2 1.6 2.0 number of amplifiers v os (mv) ada4692-2 v sy = 2.7v t a = 25c ?0.3v v cm +1.6v signifies center of bin 07950-003 figure 9. input offset voltage distribution 30 25 20 15 10 5 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 number of amplifiers tcv os (v/c) ada4692-2 v sy = 1.35v ?40c < t a < +125c signifies center of bin 07950-004 figure 10. input offset voltage drift distribution 2.0 ?2.0 ?1.5 ?1.0 ?0.5 0 0.5 1.0 1.5 ?0.5 2.5 2.0 1.5 1.0 0.5 0 v os (mv) v cm (v) ada4692-2 v sy = 2.7v t a = 25c 07950-005 figure 11. input offset voltage vs. common-mode voltage 700 600 500 400 300 200 100 0 ?2.0 ?1.6 ?1.2 ?0.8 ?0.4 0 0.4 0.8 1.2 1.6 2.0 number of amplifiers v os (mv) ada4692-2 v sy = 5v t a = 25c ?0.3v v cm +3.9v signifies center of bin 07950-006 figure 12. input offset voltage distribution 30 25 20 15 10 5 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 number of amplifiers tcv os (v/c) ada4692-2 v sy = 2.5v ?40c < t a < +125c signifies center of bin 07950-007 figure 13. input offset voltage drift distribution 2.0 ?2.0 ?1.5 ?1.0 ?0.5 0 0.5 1.0 1.5 ?0.5 5.0 2.02.53.03.54.04.5 1.51.00.5 0 v os (mv) v cm (v) ada4692-2 v sy = 5v t a = 25c 07950-008 figure 14. input offset voltage vs. common-mode voltage
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 9 of 20 1k 0.01 0.1 1 10 100 25 12511510595857565554535 i b (pa) temperature (c) ada4692-2 v sy = 1.35v t a = 25c average 20 channels 07950-009 figure 15. input bias current vs. temperature 1k 0.001 0.01 0.1 1 10 100 02 . 7 2.42.11.81.5 1.2 0.90.60.3 i b (pa) v cm (v) ada4692-2 v sy = 2.7v average 20 channels t a = 125c t a = 85c t a = 25c 07950-010 figure 16. input bias current vs. common-mode voltage 10k 0.01 0.1 1 10 100 1k 0.001 100 10 1 0.1 0.01 output saturation voltage (mv) i load (ma) ada4692-2 v sy = 1.35v v oh = (v+) ? v out (sourcing) 07950-011 t a = +125c t a = +85c t a = +25c t a = ?40c figure 17. output voltage (v oh ) to supply rail vs. load current 1k 0.01 0.1 1 10 100 25 12511510595857565554535 i b (pa) temperature (c) ada4692-2 v sy = 2.5v t a = 25c average 20 channels 07950-012 figure 18. input bias current vs. temperature 1k 0.01 0.1 1 10 100 05 4.5 4.0 3.53.02.52.01.51.0 0.5 i b (pa) v cm (v) . 0 ada4692-2 v sy = 5v average 20 channels t a = 125c t a = 85c t a = 25c 07950-013 figure 19. input bias current vs. common-mode voltage 10k 0.01 0.1 1 10 100 1k 0.001 100 10 1 0.1 0.01 output saturation voltage (mv) i load (ma) ada4692-2 v sy = 2.5v v oh = (v+) ? v out (sourcing) 07950-014 t a = +125c t a = ?40c t a = +25c t a = +85c figure 20. output voltage (v oh ) to supply rail vs. load current
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 10 of 20 10k 0.01 0.1 1 10 100 1k 0.001 100 10 1 0.1 0.01 output saturation voltage (mv) i load (ma) ada4692-2 v sy = 1.35v v ol = v out ? (v?) (sinking) 07950-015 t a = +125c t a = +85c t a = +25c t a = ?40c figure 21. output voltage (v ol ) to supply rail vs. load current 120 100 80 60 40 20 0 ?20 ?40 ?60 120 100 80 60 40 20 0 ?20 ?40 ?60 1k 10m 1m 100k 10k gain (db) phase (degrees) frequency (hz) ada4692-2 v sy = 1.35v t a = 25c a v = ?1 c l = 20pf c l = 200pf 07950-021 figure 22. open-loop gain and phase vs. frequency 50 ?30 ?20 ?10 0 10 20 30 40 10 100 1k 10k 100k 1m 10m gain (db) frequency (hz) ada4692-2 v sy = 1.35v t a = 25c r l = 600 ? a v = +100 a v = +10 a v = +1 07950-022 figure 23. closed-loop gain vs. frequency 10k 0.01 0.1 1 10 100 1k 0.001 100 10 1 0.1 0.01 output saturation voltage (mv) i load (ma) ada4692-2 v sy = 2.5v v ol = v out ? (v?) (sinking) 07950-018 t a = +125c t a = ?40c t a = +25c t a = +85c figure 24. output voltage (v ol ) to supply rail vs. load current 120 100 80 60 40 20 0 ?20 ?40 ?60 120 100 80 60 40 20 0 ?20 ?40 ?60 1k 10m 1m 100k 10k gain (db) phase (degrees) frequency (hz) ada4692-2 v sy = 2.5v t a = 25c a v = ?1 c l = 20pf c l = 200pf 07950-024 figure 25. open-loop gain and phase vs. frequency 50 ?30 ?20 ?10 0 10 20 30 40 10 100 1k 10k 100k 1m 10m gain (db) frequency (hz) ada4692-2 v sy = 2.5v t a = 25c r l = 600 ? a v = +100 a v = +10 a v = +1 07950-025 figure 26. closed-loop gain vs. frequency
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 11 of 20 1k 0.01 0.1 1 10 100 100 1k 10k 100k 1m 10m z out ( ? ) frequency (hz) ada4692-2 v sy = 1.35v t a = 25c a v = ?100 a v = ?10 a v = ?1 07950-023 figure 27. output im pedance vs. frequency 120 100 80 60 40 20 0 100 1k 10k 100k 1m 10m cmrr (db) frequency (hz) 07950-027 ada4692-2 v sy = 1.35v t a = 25c figure 28. cmrr vs. frequency 100 80 60 40 20 ?20 0 100 1k 10k 100k 1m 10m psrr (db) frequency (hz) psrr+ psrr? 07950-028 ada4692-2 v sy = 1.35v t a = 25c figure 29. psrr vs. frequency 1k 0.01 0.1 1 10 100 100 1k 10k 100k 1m 10m z out ( ? ) frequency (hz) ada4692-2 v sy = 2.5v t a = 25c a v = ?100 a v = ?10 a v = ?1 07950-026 figure 30. output im pedance vs. frequency 120 100 80 60 40 20 0 100 1k 10k 100k 1m 10m cmrr (db) frequency (hz) 07950-030 ada4692-2 v sy = 2.5v t a = 25c figure 31. cmrr vs. frequency 100 80 60 40 20 ?20 0 100 1k 10k 100k 1m 10m psrr (db) frequency (hz) psrr? psrr+ 07950-031 ada4692-2 v sy = 2.5v t a = 25c figure 32. psrr vs. frequency
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 12 of 20 1k 100 10 0.1 1 10 100 1k 10k voltage noise density (nv/ hz) frequency (hz) ada4692-2 v sy = 1.35v t a = 25c 07950-029 figure 33. voltage noise density vs. frequency 50 0 5 10 15 20 25 30 35 40 45 10 100 1k overshoot (%) capacitance (pf) ada4692-2 v sy = 1.35v v in = 100mv p-p a v = +1 r l = 2k ? t a = 25c overshoot+ overshoot? 07950-033 figure 34. small signal overshoot vs. load capacitance time (2s/div) output (500mv/div) ada4692-2 v sy = 1.35v gain = +1 r l = 2k ? c l = 300pf t a = 25c 07950-034 figure 35. large signal transient response 1k 100 10 0.1 1 10 100 1k 10k voltage noise density (nv/ hz) frequency (hz) 07950-032 ada4692-2 v sy = 2.5v t a = 25c figure 36. voltage noise density vs. frequency 45 0 5 10 15 20 25 30 35 40 10 100 1k overshoot (%) capacitance (pf) ada4692-2 v sy = 2.5v v in = 100mv p-p a v = +1 r l = 2k ? t a = 25c overshoot+ overshoot? 07950-036 figure 37. small signal overshoot vs. load capacitance ada4692-2 v sy = 2.5v gain = +1 r l = 2k ? , c l = 300pf t a = 25c 07950-037 time (2s/div) output (500mv/div) figure 38. large signal transient response
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 13 of 20 ada4692-2 v sy = 1.35v gain = +1 r l = 2k ? c l = 200pf t a = 25c 07950-035 time (2s/div) output (20mv/div) figure 39. small signal transient response ada4692-2 v sy = 1.35v gain = +1m t a = 25c 0 7950-040 time (1s/div) output (1v/div) figure 40. 0.1 hz to 10 hz noise 250 200 150 100 50 0 05 . 0 4.5 4.0 3.53.02.52.01.51.0 0.5 i sy /channel (a) v sy (v) ada4692-2 07950-135 t a = +125c t a = +85c t a = +25c t a = ?40c figure 41. supply current per amplifier vs. supply voltage t ada4692-2 v sy = 2.5v gain = +1 r l = 2k ? c l = 200pf t a = 25c 07950-038 time (2s/div) output (20mv/div) figure 42. small signal transient response ada4692-2 v sy = 2.5v gain = +1m t a = 25c 07950-043 time (1s/div) output (1v/div) figure 43. 0.1 hz to 10 hz noise 250 225 200 175 150 125 ?40 12511095806550 35 20 5 ?10 ?25 i sy /amplifier (a) temperature (c) ada4692-2 v sy = 2.5v v sy = 1.35v 07950-138 figure 44. supply current per channel vs. temperature
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 14 of 20 1 0.1 0.01 0.001 10 100 1k 10k 20k thd + n (%) frequency (hz) ada4692-2 v sy = 1.35v a v = ?1 t a = 25c 07950-042 r l = 600 ? r l = 2k ? figure 45. thd + noise vs. frequency ada4692-2 v sy = 1.35v t a = 25c 07950-050 time (4s/div) 50mv/div 1v/div figure 46. positive overload recovery ada4692-2 v sy = 1.35v t a = 25c 07950-052 time (4s/div) 50mv/div 1v/div figure 47. negative overload recovery 1 0.1 0.01 0.001 10 100 1k 10k 20k thd + n (%) frequency (hz) ada4692-2 v sy = 2.5v a v = ?1 t a = 25c 07950-045 r l = 600 ? r l = 2k ? figure 48. thd + noise vs. frequency ada4692-2 v sy = 2.5v a v = ?100 t a = 25c 07950-051 time (4s/div) 50mv/div 1v/div figure 49. positive overload recovery ada4692-2 v sy = 2.5v a v = ?100 t a = 25c 07950-053 time (4s/div) 50mv/div 1v/div figure 50. negative overload recovery
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 15 of 20 ada4692-2 v sy = 1.35v r l = 2k ? t a = 25c 07950-054 time (1s/div) 200mv/div 10mv/div error band figure 51. positive settling time to 0.1% 07950-056 time (1s/div) 200mv/div 10mv/div error band ada4692-2 v sy = 1.35v r l = 2k ? t a = 25c figure 52. negative settling time to 0.1% ? 80 ?90 ?100 ?110 ?120 ?130 ?140 100 1k 10k 100k channel separation (db) frequency (hz) 07950-140 ada4692-2 v sy = 2.5v v in = 2.8v p-p a v = +1 t a = 25c v? v+ v? v+ u2 r2 1k? r1 100k ? 6 7 5 v+ v? v+ v? 0 0 0 0 + ? v in r3 600 ? u1 2 3 cs (db) = 20 log (v out /100 = v in ) figure 53. channel separation (cs) vs. frequency 07950-055 time (1s/div) 1v/div 20mv/div error band ada4692-2 v sy = 2.5v r l = 2k ? t a = 25c figure 54. positive settling time to 0.1% 07950-057 time (1s/div) 1v/div 20mv/div error band ada4692-2 v sy = 2.5v r l = 2k ? t a = 25c figure 55. negative settling time to 0.1%
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 16 of 20 shutdown operation input pin characteristics the ada4691-2 has a classic cmos logic inverter input for each shutdown pin, as shown in figure 56 . 0 7950-149 v dd p-channel n-channel input output figure 56. cmos inverter with slowly changing inputs, the top transistor and bottom transistor may be slightly on at the same time, increasing the supply current. this can be avoided by driving the input with a digital logic output having fast rise and fall times. figure 57 through figure 59 show the supply current for both sections switching simultaneously with rise times of 1 s, 10 s, and 1 ms. clearly, the rise and fall times should be faster than 10 s. using an rc time constant to enable/disable shutdown is not recommended. 07950-150 time (400s/div) i sy = 196mv/1k = 196a sd a, sd b dut output figure 57. shutdown pi n rise time = 1 s 07950-151 time (400s/div) i sy = 192mv/1k = 196a sd a, sd b dut output figure 58. shutdown pin rise time = 10 s 07950-152 time (400s/div) i sy = 724mv/1k = 724a sd a, sd b dut output figure 59. shutdown pin rise time = 1 ms input threshold the input threshold is approximately 1.2 v above the v? pin when operating on ground and 5 v and 0.9 v when operating on 2.7 v (see figure 60 and figure 61 ). the threshold is relatively stable over temperature. for operation on split supplies, the logic swing may have to be level shifted. 500 450 400 350 300 250 200 150 100 50 0 05 4.5 4.0 3.53.02.52.01.51.0 0.5 i sy (a) sd voltage (v) . 0 ada4691-2 t a = 25c v sy = 5v 07950-155 t a = +125c t a = +25c t a = ?40c t a = +85c figure 60. supply current vs. temperature, v sy = 5 v 300 250 200 150 100 50 0 02 2.42.11.81.5 1.2 0.90.60.3 i sy (a) sd voltage (v) . 7 ada4691-2 v sy = 2.7v 07950-156 t a = +125c t a = ?40c t a = +85c t a = +25c figure 61. supply current vs. temperature, v sy = 2.7 v
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 17 of 20 outline dimensions 3.10 3.00 sq 2.90 0.30 0.23 0.18 1.75 1.60 sq 1.45 08-16-2010-e 1 0.50 bsc bottom view top view 16 5 8 9 12 13 4 exposed pad p i n 1 i n d i c a t o r 0.50 0.40 0.30 seating plane 0.05 max 0.02 nom 0.20 ref 0.25 min coplanarity 0.08 pin 1 indicator for proper connection of the exposed pad, refer to the pin configuration and function descriptions section of this data sheet. 0.80 0.75 0.70 compliant to jedec standards mo-220-weed-6. figure 62. 16-lead lead frame chip scale package [lfcsp_wq] 3 mm 3 mm body, very very thin quad (cp-16-22) dimensions shown in millimeters 0 91709-a 1.250 1.210 1.170 0.645 0.600 0.555 bottom view (ball side up) top view (ball side down) a 123 b c 0.230 0.200 0.170 0.287 0.267 0.247 seating plane 0.415 0.400 0.385 ball a1 identifier 1.260 1.220 1.180 0.05 nom coplanarity 0.40 bsc figure 63. 9-ball wafer level chip scale package [wlcsp] (cb-9-3) dimensions shown in millimeters
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 18 of 20 081308-d top view 10 9 1 3 4 5 6 8 0.30 0.25 0.18 bottom view pin 1 index area 2.00 bsc sq seating plane 0.60 0.55 0.50 0.20 ref 0.05 max 0.02 nom 0.50 0.45 0.40 0.50 bsc p i n 1 i n d i c a t o r coplanarity 0.05 figure 64. 10-lead lead frame chip scale package [lfcsp_uq] 2 mm 2 mm body, ultra thin quad (cp-10-11) dimensions shown in millimeters 062409-a top view 8 1 5 4 0.30 0.25 0.18 bottom view pin 1 index area 2.00 bsc sq seating plane 0.60 0.55 0.50 0.20 ref 0.05 max 0.02 nom 0.65 0.60 0.55 0.50 bsc p i n 1 i n d i c a t o r figure 65. 8-lead lead frame chip scale package [lfcsp_ud] 2 mm 2 mm body, ultra thin, dual lead (cp-8-6) dimensions shown in millimeters
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 19 of 20 controlling dimensions are in millimeters; inch dimensions (in parentheses) are rounded-off millimeter equivalents for reference only and are not appropriate for use in design. compliant to jedec standards ms-012-aa 012407-a 0.25 (0.0098) 0.17 (0.0067) 1.27 (0.0500) 0.40 (0.0157) 0.50 (0.0196) 0.25 (0.0099) 45 8 0 1.75 (0.0688) 1.35 (0.0532) seating plane 0.25 (0.0098) 0.10 (0.0040) 4 1 85 5.00 (0.1968) 4.80 (0.1890) 4.00 (0.1574) 3.80 (0.1497) 1.27 (0.0500) bsc 6.20 (0.2441) 5.80 (0.2284) 0.51 (0.0201) 0.31 (0.0122) coplanarity 0.10 figure 66. 8-lead standard small outline package [soic_n] narrow body (r-8) dimensions shown in millimeters and (inches) compliant to jedec standards mo-153-ab-1 061908-a 8 0 4.50 4.40 4.30 14 8 7 1 6.40 bsc pin 1 5.10 5.00 4.90 0.65 bsc 0.15 0.05 0.30 0.19 1.20 max 1.05 1.00 0.80 0.20 0.09 0.75 0.60 0.45 coplanarity 0.10 seating plane figure 67. 14-lead thin shrink small outline package [tssop] (ru-14) dimensions shown in millimeters
ada4691-2/ada4691-4/ada4692-2/ada4692-4 rev. d | page 20 of 20 ordering guide model 1 temperature range package description package option branding ada4691-2acbz-r7 ?40c to +125c 9-ball wlcsp cb-9-3 a2c ada4691-2acbz-rl ?40c to +125c 9-ball wlcsp cb-9-3 a2c ada4691-2acpz-r7 ?40c to +125c 10-lead lfcsp_uq cp-10-11 a2 ada4691-2acpz-rl ?40c to +125c 10-lead lfcsp_uq cp-10-11 a2 ada4691-4acpz-r2 ?40c to +125c 16-lead lfcsp_wq cp-16-22 a2p ada4691-4acpz-r7 ?40c to +125c 16-lead lfcsp_wq cp-16-22 a2p ada4691-4acpz-rl ?40c to +125c 16-lead lfcsp_wq cp-16-22 a2p ada4692-2acpz-r7 ?40c to +125c 8-lead lfcsp_ud cp-8-6 a3 ada4692-2acpz-rl ?40c to +125c 8-lead lfcsp_ud cp-8-6 a3 ada4692-2arz ?40c to +125c 8-lead soic_n r-8 ada4692-2arz-r7 ?40c to +125c 8-lead soic_n r-8 ada4692-2arz-rl ?40c to +125c 8-lead soic_n r-8 ada4692-4aruz ?40c to +125c 14-lead tssop ru-14 ada4692-4aruz-rl ?40c to +125c 14-lead tssop ru-14 1 z = rohs compliant part. ?2009C2010 analog devices, inc. all rights reserved. trademarks and registered trademarks are the prop erty of their respective owners. d07950-0-11/10(d)

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