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16 v, 4 mhz rail-to-rail output amplifiers ad8665/ad8666/ad8668 rev. a 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 ?2006 analog devices, inc. all rights reserved. features offset voltage: 2.5 mv max low input bias current: 1 pa max single-supply operation: 5 v to 16 v dual-supply operation: 2.5 v to 8 v low noise: 8 nv/hz @ 10 khz wide bandwidth: 4 mhz rail-to-rail output unity-gain stable lead-free packaging applications sensor amplification reference buffers medical equipment physiological measurements signal filters and conditioning consumer audio photodiode amplification adc driver level shifting circuits general description the ad866x family are single supply, rail-to-rail output amplifiers with low noise performance featuring an extended operating range with supply voltages up to 16 v. they also feature low input bias currents, wide signal bandwidth, and low input voltage and current noise. for lower offset voltage, choose the ad8661/ad8662/ad8664 family . the combination of low offsets, very low input bias currents, and wide supply range make these amplifiers useful in a wide variety of cost sensitive applications normally associated with much higher priced jfet amplifiers. systems using high impedance sensors, such as photo diodes, benefit from the combination of low input bias current, low noise, and low offset and bandwidth. the wide operating voltage range matches high performance adcs and dacs. audio applications and medical monitoring equipment can take advantage of the high input impedance, low voltage and current noise, wide bandwidth, and the lack of popcorn noise found in many other low input bias current amplifiers. the ad866x family is specified over the extended industrial temperature range (?40c to +125c). pin configurations 1 2 3 5 4 ?in +in v+ out ad8665 top view (not to scale) v? 06195-039 figure 1. ad8665, 5-lead sot-23 (rj-5) nc 1 ?in 2 +in 3 vee 4 nc 8 vcc 7 out 6 nc 5 ad8665 top view (not to scale) nc = no connect 0 6195-040 figure 2. ad8665, 8-lead soic_n (r-8) out a 1 ?in a 2 +in a 3 v? 4 v+ 8 out b 7 ?in b 6 +in b 5 ad8666 top view (not to scale) 06018-001 figure 3. ad8666, 8-lead soic_n (r-8) o ut a 1 ?in a 2 +in a 3 v? 4 v+ 8 out b 7 ?in b 6 +in b 5 ad8666 top view (not to scale) 06195-002 figure 4. ad8666, 8-lead msop (rm-8) 1 2 3 4 5 6 7 ad8668 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) 06195-003 figure 5. ad8668, 14-lead tssop (ru-14) out a ?in a +in a v+ out d ?in d +in d v? +inb +inc ?in b out b ?in c out c ad8648 top view (not to scale) out a ad8668 top view (not to scale) ad8648 top view (not to scale) 6 1 2 3 4 5 7 14 13 12 11 10 9 8 ad8668 top view (not to scale) 06195-004 figure 6. ad8668, 14-lead soic_n (r-14)
ad8665/ad8666/ad8668 rev. a | page 2 of 16 table of contents features .............................................................................................. 1 applications ....................................................................................... 1 general description ......................................................................... 1 pin configurations ........................................................................... 1 revision history ............................................................................... 2 specifications ..................................................................................... 3 absolute maximum ratings ............................................................5 thermal resistance .......................................................................5 esd caution ...................................................................................5 typical performance characteristics ..............................................6 outline dimensions ....................................................................... 12 ordering guide .......................................................................... 13 revision history 10/06rev. 0 to rev. a added ad8665 ...................................................................universal added new figure 1 and figure 2, renumbered sequentially................................................................ 1 changes to table 4............................................................................ 5 changes to figure 8, figure 9, and figure 11 ............................... 6 change to figure 40 ....................................................................... 11 updated outline dimensions ....................................................... 12 changes to ordering guide .......................................................... 13 4/06rev 0: initial version
ad8665/ad8666/ad8668 rev. a | page 3 of 16 specifications v dd = 5.0 v, v cm = v dd /2, t a = 25 o c, unless otherwise noted. table 1. parameter symbol conditions min typ max unit input characteristics offset voltage v os v cm = 2.5 v 0.7 2.5 mv v cm = ?0.1 v to +3.0 v 3.0 mv ?40c < t a < +125c 5.0 mv offset voltage drift v os /t ?40c < t a < +125c 3.0 10 v/c input bias current i b 0.2 1 pa ?40c < t a < +125c 550 pa input offset current i os 0.1 0.5 pa ?40c < t a < +125c 70 pa input voltage range v cm ?0.1 +3.0 v common-mode rejection ratio cmrr v cm = ?0.1 v to +3.0 v 84 100 db ?40c < t a < +125c 79 db large-signal voltage gain a vo r l = 2 k, v o = 0.5 v to 4.5 v 68 145 v/mv output characteristics output voltage high v oh i out = 1 ma 4.88 4.93 v ?40c < t a < +125c 4.86 v output voltage low v ol i out = 1 ma 50 85 mv ?40c < t a < +125c 105 mv short-circuit output current i sc 19 ma closed-loop output impedance z out at 1 mhz, a v = 1 50 power supply power supply rejection ratio psrr v dd = 5.0 v to 16 v 98 115 db ?40c < t a < +125c 94 db supply current per amplifier i sy 1.1 1.4 ma ?40c < t a < +125c 2.0 ma dynamic performance slew rate sr r l = 2 k 3.5 v/s gain bandwidth product gbp 4 mhz phase margin m 70 degrees noise performance peak-to-peak noise e n p-p 0.1 hz to 10 hz 2.4 v p-p voltage noise density e n f = 1 khz 10 nv/hz f = 10 khz 8 nv/hz channel separation cs f = 10 khz ?115 db
ad8665/ad8666/ad8668 rev. a | page 4 of 16 v dd = 16 v, v cm = v dd /2, t a = 25 o c, unless otherwise noted. table 2. parameter symbol conditions min typ max unit input characteristics offset voltage v os v cm = 8 v 0.6 2.5 mv v cm = ?0.1 v to +14.0 v 3.0 mv ?40c < t a < +125c 5.0 mv offset voltage drift v os /t ?40c < t a < +125c 3.0 10 v/c input bias current i b 0.2 1 pa ?40c < t a < +125c 550 pa input offset current i os 0.1 0.5 pa ?40c < t a < +125c 70 pa input voltage range v cm ?0.1 +14.0 v common-mode rejection ratio cmrr v cm = ?0.1 v to +14.0 v 90 110 db ?40c < t a < +125c 80 db large-signal voltage gain a vo r l = 2 k, v o = 0.5 v to 15.5 v 130 255 v/mv output characteristics output voltage high v oh i out = 1 ma 15.94 15.96 v ?40c < t a < +125c 15.90 v output voltage low v ol i out = 1 ma 22 40 mv ?40c < t a < +125c 50 mv short-circuit output current i sc 140 ma closed-loop output impedance z out at 1 mhz, a v = 1 50 power supply power supply rejection ratio psrr v dd = 5.0 v to 16 v 98 115 db ?40c < t a < +125c 94 db supply current per amplifier i sy 1.15 1.55 ma ?40c < t a < +125c 2.0 ma dynamic performance slew rate sr r l = 2 k 3.5 v/s gain bandwidth product gbp 4 mhz phase margin m 73 degrees noise performance peak-to-peak noise e n p-p 0.1 hz to 10 hz 2.5 v p-p voltage noise density e n f = 1 khz 10 nv/hz f = 10 khz 8 nv/hz channel separation cs f = 10 khz ?115 db
ad8665/ad8666/ad8668 rev. a | page 5 of 16 absolute maximum ratings table 3. parameter rating supply voltage 18 v input voltage gnd to v dd differential input voltage 18 v output short-circuit to gnd indefinite storage temperature range ?65c to +150c operating temperature range ?40c to +125c lead temperature (soldering, 60 sec) 300c junction temperature 150c 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 table 4. thermal resistance package type ja jc unit 5-lead sot-23 (rj-5) 240 92 c/w 8-lead soic_n (r-8) 158 43 c/w 8-lead msop (rm-8) 210 45 c/w 14-lead soic (r-14) 120 36 c/w 14-lead tssop (ru-14) 180 35 c/w esd caution
ad8665/ad8666/ad8668 rev. a | page 6 of 16 typical performance characteristics 100 0 ?3 3 input offset voltage (mv) number of amplifiers 90 80 70 60 50 40 30 20 10 ?2 ?1 0 1 2 v dd = 16v v cm = 8v t a = 25c 600 amplifiers 06195-005 temperature (c) input bias current (pa) ?40 0 300 250 200 150 100 50 120 10080 40 60 20 0 ?20 v s = 5v and 16v 06195-008 figure 10. input bias current vs. temperature figure 7. input offset voltage distribution 20 0 01 2 10000 0.1 0.001 100 load current (ma) output saturation voltage (mv) tcv os (v/c) number of amplifiers v dd = 16v t a = 25c v dd = 16v v cm = 8v ?40c < t a < +125c 300 amplifiers 18 16 14 12 10 8 6 4 2 1234567891011 06195-006 figure 8. v os drift (tcv os ) distribution 5 ?5 ?1 15 input common-mode voltage (v) input offset voltage (mv) 4 3 2 1 0 ?1 ?2 ?3 ?4 01234567891011121314 v dd = 16v t a = 25c 0 6195-007 figure 9. offset voltage vs. common-mode voltage 0.01 0.1 1 10 1 10 100 1000 v dd to v oh sourcing v ol sinking 0 6195-009 figure 11. output saturation voltage vs. load current 100 0 ?40 120 temperature (c) output saturation voltage (mv) 80 60 40 20 ?20 0 20 40 60 80 100 v dd = 16v i out = 1ma v dd to v oh sourcing v ol sinking 0 6195-010 figure 12. output saturation voltage vs. temperature
ad8665/ad8666/ad8668 rev. a | page 7 of 16 100 0 1k 4m frequency (hz) psrr (db) 10k 100k 1m 80 60 40 20 v dd = 16v t a = 25c psrr? psrr+ 0 6195-014 80 ?20 1k 10m frequency (hz) open-loop gain (db) 10k 100k 1m 60 40 20 0 0 225 open-loop phase shift (degrees) 45 90 135 180 v dd = 16v r l = 2k ? c l = 10pf m = 73 gain phase 06195-011 figure 16. power supply reje ction ratio vs. frequency figure 13. open-loop gain and phase vs. frequency 100 1 10 10k frequency (hz) voltage noise density (nv/ hz) 100 1k 10 v dd = 5v to 16v t a = 25c 0 6195-015 1000 0.01 100 10m frequency (hz) z out ( ? ) 1k 10k 100k 1m 0.1 1 10 100 a v = +100 v dd = 16v a v = +1 06195-012 a v = +10 figure 17. voltage noise density vs. frequency figure 14. closed-loop outp ut impedance vs. frequency time (1s/div) voltage (1v/div) v dd = 5v to 16v t a = 25c 06195-016 120 0 1k 4m frequency (hz) cmrr (db) 10k 100k 1m 100 80 60 40 20 v dd = 16v t a = 25c 06195-013 figure 15. common-mode reje ction ratio vs. frequency figure 18. 0.1 hz to 10 hz voltage noise
ad8665/ad8666/ad8668 rev. a | page 8 of 16 time (0.5s/div) v out (20mv/div) v dd = 16v r l = 10k ? c l = 10pf a v = +1 06195-017 time (5s/div) 0v 8v ?100mv 0v v in v out v dd = 8v a v = ?100 06195-020 figure 19. small-signal transient response figure 22. positive overload recovery time time (2s/div) v out (v) v dd =8v r l = 10k ? c l = 10pf a v = +1 10 ?10 ?8 ?6 ?4 ?2 2 4 6 8 0 06195-018 time (5s/div) ?8v 0v 0v 100m v v in v out v dd = 8v a v = ?100 06195-021 figure 23. negative overload recovery time figure 20. large-signal transient response 80 0 ?3 3 input offset voltage (mv) number of amplifiers 70 60 50 40 30 20 10 ?2 ?1 0 1 2 v dd = 5v v cm = 2.5v t a = 25c 550 amplifiers 06195-022 70 0 1 1000 load capacitance (pf) overshoot (%) 10 100 60 50 40 30 20 10 v dd = 16v v in = 100mv p-p +os ?os 06195-019 figure 24. input offset voltage distribution figure 21. small-signal overshoot vs. load capacitance
ad8665/ad8666/ad8668 rev. a | page 9 of 16 tcv os (v/c) number of amplifiers 30 0 01 0 120 0 ?40 120 temperature (c) output saturation voltage (mv) v dd = 5v v cm = 2.5v ?40c t a +125c 300 amplifiers v dd = 5v i load = 1ma 25 20 15 10 5 100 80 60 40 20 v dd to v oh sourcing ?20 0 20 40 60 80 100 v ol sinking 06195-026 123456789 06195-023 figure 28. output saturation voltage vs. temperature figure 25. v drift (tcv ) distribution os os 80 ?20 1k 10m frequency (hz) open-loop gain (db) 10k 100k 1m 60 40 20 0 0 225 open-loop phase shift (degrees) 45 90 135 180 m = 70 gain phase v dd = 5v r l = 2k ? c l = 10pf 06195-027 5 ?5 ?0.5 3.5 input common-mode voltage (v) input offset voltage (mv) 4 3 2 1 0 ?1 ?2 ?3 ?4 0 0.5 1.0 1.5 2.0 2.5 3.0 v dd = 5v t a =25c 06195-024 figure 29. open-loop gain and phase vs. frequency figure 26. offset voltage vs. common-mode voltage 1000 0.01 100 10m frequency (hz) z out ( ? ) 1k 10k 100k 1m 0.1 1 10 100 v dd = 5v a v = +100 a v = +10 a v = +1 06195-028 0.1 0.001 load current (ma) output saturation voltage (mv) 0.01 0.1 1 10 20 1 10 100 1000 3000 v dd = 5v t a = 25c v dd to v oh sourcing v ol sinking 06195-025 figure 30. closed-loop outp ut impedance vs. frequency figure 27. output saturation voltage vs. load current
ad8665/ad8666/ad8668 rev. a | page 10 of 16 120 0 1k 4m frequency (hz) cmrr (db) 10k 100k 1m 100 80 60 40 20 v dd = 5v t a =25c 0 6195-029 time (1s/div) v out (v) 1.5 ?2.5 1.0 0.5 0 ?0.5 ?1.0 ?1.5 ?2.0 v dd =2.5v r l = 10k ? c l = 10pf a v = +1 06195-032 figure 34. large-signal transient response figure 31. common-mode reje ction ratio vs. frequency 100 0 1k 4m frequency (hz) psrr (db) 10k 100k 1m 80 60 40 20 v dd = 5v t a = 25c psrr? psrr+ 06195-030 70 0 1 1000 load capacitance (pf) overshoot (%) 10 100 60 50 40 30 20 10 v dd =5v v in = 100mv p-p ?os +os 06195-033 figure 32. power supply reje ction ratio vs. frequency figure 35. small-signal overshoot vs. load capacitance time (0.4s/div) v out (20mv/div) v dd = 5v r l = 100k ? c l = 10pf a v = +1 06195-031 time (4s/div) 2.5v 0v 0v ? 100m v v dd =2.5v a v = ?100 v out v in 06195-034 figure 36. positive overload recovery time figure 33. small-signal transient response
ad8665/ad8666/ad8668 rev. a | page 11 of 16 2.00 0 01 supply voltage (v) supply current (ma) time (4s/div) 100mv 0v 0v ?2.5v v dd =2.5v a v = ?100 v out v in 06195-035 6 1.75 1.50 1.25 1.00 0.75 0.50 0.25 2468101214 0 6195-037 figure 37. negative overload recovery time figure 39. supply current vs. supply voltage 2.0 0 ?40 120 temperature (c) supply current (ma) 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 ?20 0 20 40 60 80 100 v out = v dd /2 v dd = 16v v dd = 5v 06195-036 time (10s/div) voltage (v) v out v in 10 ?10 8 6 4 2 0 ?2 ?4 ?6 ?8 v dd =8v a v = +1 06195-038 figure 40. no output phase reversal figure 38. supply current vs. temperature
ad8665/ad8666/ad8668 rev. a | page 12 of 16 outline dimensions 4.50 4.40 4.30 14 8 7 1 6.40 bsc pin 1 5.10 5.00 4.90 0.65 bsc seating plane 0.15 0.05 0.30 0.19 1.20 max 1.05 1.00 0.80 0.20 0.09 8 0 0.75 0.60 0.45 coplanarity 0.10 compliant to jedec standards mo-153-ab-1 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 (0.2440) 5.80 (0.2284) 0.51 (0.0201) 0.31 (0.0122) coplanarity 0.10 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 figure 41. 8-lead standard small outline package [soic_n] narrow body (r-8) dimensions shown in millimeters and (inches) figure 43. 14-lead thin shrink small outline package [tssop] (ru-14) dimensions shown in millimeters compliant to jedec standards mo-187-aa 0.80 0.60 0.40 8 0 4 8 1 5 pin 1 0.65 bsc seating plane 0.38 0.22 1.10 max 3.20 3.00 2.80 coplanarity 0.10 0.23 0.08 3.20 3.00 2.80 5.15 4.90 4.65 0.15 0.00 0.95 0.85 0.75 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-ab coplanarity 0.10 14 8 7 1 6.20 (0.2441) 5.80 (0.2283) 4.00 (0.1575) 3.80 (0.1496) 8.75 (0.3445) 8.55 (0.3366) 1.27 (0.0500) bsc seating plane 0.25 (0.0098) 0.10 (0.0039) 0.51 (0.0201) 0.31 (0.0122) 1.75 (0.0689) 1.35 (0.0531) 8 0 0.50 (0.0197) 0.25 (0.0098) 1.27 (0.0500) 0.40 (0.0157) 0.25 (0.0098) 0.17 (0.0067) 45 figure 42. 8-lead mini small outline package [msop] (rm-8) dimensions shown in millimeters figure 44. 14-lead standard small outline package [soic_n] narrow body (r-14) dimensions shown in millimeters and (inches)
ad8665/ad8666/ad8668 rev. a | page 13 of 16 pin 1 1.60 bsc 2.80 bsc 1.90 bsc 0.95 bsc 5 123 4 0.22 0.08 10 5 0 0.50 0.30 0.15 max seating plane 1.45 max 1.30 1.15 0.90 2.90 bsc 0.60 0.45 0.30 compliant to jedec standards mo-178-aa figure 45. 5-lead small outline transistor package [sot-23] (rj-5) dimensions shown in millimeters ordering guide model temperature range package description package option branding ad8665arz ?40c to +125c 8-lead soic_n r-8 1 ad8665arz-reel ?40c to +125c 8-lead soic_n r-8 1 ad8665arz-reel7 ?40c to +125c 8-lead soic_n r-8 1 AD8665ARJZ-R2 ?40c to +125c 5-lead sot-23 rj-5 a1b 1 ad8665arjz-reel ?40c to +125c 5-lead sot-23 rj-5 a1b 1 ad8665arjz-reel7 ?40c to +125c 5-lead sot-23 rj-5 a1b 1 ad8666arz ?40c to +125c 8-lead soic_n r-8 1 ad8666arz-reel ?40c to +125c 8-lead soic_n r-8 1 ad8666arz-reel7 ?40c to +125c 8-lead soic_n r-8 1 ad8666armz-r2 ?40c to +125c 8-lead msop rm-8 a16 1 ad8666armz-reel ?40c to +125c 8-lead msop rm-8 a16 1 ad8668arz ?40c to +125c 14-lead soic_n r-14 1 ad8668arz-reel ?40c to +125c 14-lead soic_n r-14 1 ad8668arz-reel7 ?40c to +125c 14-lead soic_n r-14 1 ad8668aruz ?40c to +125c 14-lead tssop ru-14 1 ad8668aruz-reel ?40c to +125c 14-lead tssop ru-14 1 1 z = pb-free part.
ad8665/ad8666/ad8668 rev. a | page 14 of 16 notes
ad8665/ad8666/ad8668 rev. a | page 15 of 16 notes
ad8665/ad8666/ad8668 rev. a | page 16 of 16 notes ?2006 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d06195-0-10/06(a)

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