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low power, precision, auto-zero op amps ad8538/AD8539 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 ?2005C2007 analog devices, inc. all rights reserved. features low offset voltage: 13 v maximum input offset drift: 0.03 v/c single-supply operation: 2.7 v to 5.5 v high gain, cmrr, and psrr low input bias current: 25 pa low supply current: 180 a applications mobile communications portable instrumentation battery-powered devices sensor interfaces temperature measurement electronic scales general description the ad8538/AD8539 are very high precision amplifiers featuring extremely low offset voltage, low input bias current, and low power consumption. the supply current is less than 215 a maximujm per amplifier at 5.0 v. operation is fully specified from 2.7 v to 5.0 v single supply (1.35 v to 2.5 v dual supply). the ad8538/AD8539 operate at very low power making these amplifiers ideal for battery-powered devices and portable equipment. the ad8538/AD8539 are specified over the extended industrial temperature range (?40c to +125c). the ad8538 amplifier is available in 5-lead tsot-23, and 8-lead, narrow body soic packages, and the AD8539 amplifier is available in 8-lead, narrow body soic and 8-lead msop. pin configurations out 1 v? 2 +in 3 v+ 5 ?in 4 ad8538 top view (not to scale) 06741-002 figure 1. 5-lead tsot-23 (uj-5) nc 1 ? in 2 +in 3 v ? 4 nc 8 v+ 7 out 6 nc 5 nc = no connect ad8538 top view (not to scale) 06741-001 figure 2. 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 AD8539 top view (not to scale) 06741-033 figure 3. 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 AD8539 top view (not to scale) 06741-034 figure 4. 8-lead msop (rm-8)
ad8538/AD8539 rev. a | page 2 of 24 table of contents features .............................................................................................. 1 applications ....................................................................................... 1 general description ......................................................................... 1 pin configuration s ........................................................... ................ 1 revision history ............................................................................... 2 specifications ..................................................................................... 3 ad8538 electrical specifications ............................................... 3 AD8539 electrical specifications ............................................... 5 absolute maximum ratings ............................................................7 thermal resistance .......................................................................7 esd caution ...................................................................................7 typical performance characteristics ..............................................8 ad8538 characteristics ................................................................8 AD8539 characteristics ............................................................. 14 outline dimensions ....................................................................... 20 ordering guide .......................................................................... 21 revision history 5/07rev. 0 to rev. a added AD8539 ...................................................................universal changes to specifications section.................................................. 3 added table 3, renumbered tables sequentially ........................ 5 added table 4, renumbered tables sequentially ........................ 6 changes to thermal resistance section........................................ 7 added figure 32 and figure 33..................................................... 13 added AD8539 characteristics section, renumbered figures sequentially ..................................................................................... 14 updated outline dimensions....................................................... 20 changes to ordering guide .......................................................... 21 10/05revision 0: initial version
ad8538/AD8539 rev. a | page 3 of 24 specifications ad8538 electrical specifications @ v s = 5.0 v, v cm = 2.5 v, v o = 2.5 v, t a = 25c, unless otherwise specified. table 1. parameter symbol conditions min typ max unit input characteristics offset voltage v os 5 13 v ?40c t a +125c 30 v input bias current i b 15 25 pa ?40c t a +85c 35 100 pa ?40c t a +125c 0.7 1.0 na input offset current i os 20 50 pa ?40c t a +125c 150 pa input voltage range 0 5 v common-mode rejection ratio cmrr v cm = 0 v to 5 v 115 150 db ?40c t a +125c, v cm = 0.2 v to 4.8 v 100 135 db large signal voltage gain a vo r l = 10 k, v o = 0.1 v to 4.9 v 115 141 db ?40c t a +125c 110 135 db offset voltage drift v os / t ?40c t a +125c 0.03 0.1 v/c output characteristics output voltage high v oh r l = 100 k to ground 4.99 4.998 v ?40c t a +125c, r l = 100 k to ground 4.98 v r l = 10 k to ground 4.95 4.970 v ?40c t a +125c, r l = 10 k to ground 4.94 v output voltage low v ol r l = 100 k to v+ 1.9 5 mv ?40c t a +125c, r l = 100 k to v+ 2.8 7 mv r l = 10 k to v+ 17 20 mv ?40c t a +125c, r l = 10 k to v+ 20 30 mv short-circuit limit i sc 25 ma power supply power supply rejection ratio psrr v s = 2.7 v to 5.0 v 105 125 db ?40c t a +125c 100 125 db supply current/amplifier i sy i o = 0 150 180 a ?40c t a +125c 190 215 a dynamic performance slew rate sr r l =10 k 0.4 v/s settling time 0.01% t s g = 1, 2 v step, c l = 20 pf, r l = 1 k 10 s overload recovery time 0.05 ms gain bandwidth product gbp 430 khz phase margin ? m r l = 10 k, r l = 100 k, c l = 20 pf 65 degrees noise performance voltage noise e n p-p f = 0.1 hz to 10 hz 2.0 v p-p voltage noise density e n f = 1 khz 50 nv/ hz
ad8538/AD8539 rev. a | page 4 of 24 @ v s = 2.7 v, v cm = 1.35 v, v o = 1.35 v, t a = 25c, unless otherwise specified. table 2. parameter symbol conditions min typ max unit input characteristics offset voltage v os 5 13 v ?40c t a +125c 30 v input bias current i b 15 25 pa ?40c t a +85c 35 100 pa ?40c t a +125c 0.7 1.0 na input offset current i os 20 50 pa ?40c t a +125c 150 pa input voltage range 0 2.7 v common-mode rejection ratio cmrr v cm = 0 v to 2.5 v 110 140 db ?40c t a +125c 100 135 db large signal voltage gain a vo r l = 10 k, v o = 0.1 v to 1.7 v 110 140 db ?40c t a +125c 105 135 db offset voltage drift v os / t ?40c t a +125c 0.03 0.1 v/c output characteristics output voltage high v oh r l = 100 k to ground 2.68 2.698 v ?40c t a +125c, r l = 100 k to ground 2.68 v r l = 10 k to ground 2.67 2.68 v ?40c t a +125c, r l = 10 k to ground 2.66 v output voltage low v ol r l = 100 k to v+ 1.7 5 mv ?40c t a +125c, r l = 100 k to v+ 2.4 5 mv r l = 10 k to v+ 14 20 mv ?40c t a +125c, r l = 10 k to v+ 20 25 mv short-circuit limit i sc 8 ma power supply power supply rejection ratio psrr v s = 2.7 v to 5.5 v 105 125 db ?40c t a +125c 100 125 db supply current/amplifier i sy i o = 0 150 180 a ?40c t a +125c 190 215 a dynamic performance slew rate sr r l = 10 k 0.35 v/s settling time 0.01% t s g = 1, 1 v step, c l = 20 pf, r l = 1 k 5 s overload recovery time 0.05 ms gain bandwidth product gbp 430 khz phase margin ? m r l = 10 k, r l = 100 k, c l = 20 pf 65 degrees noise performance voltage noise e n p-p f = 0.1 hz to 10 hz 2.0 v p-p voltage noise density e n f = 1 khz 50 nv/ hz
ad8538/AD8539 rev. a | page 5 of 24 AD8539 electrical specifications @ v s = 5.0 v, v cm = 2.5 v, v o = 2.5 v, t a = 25c, unless otherwise specified. table 3. parameter symbol conditions min typ max unit input characteristics offset voltage v os 5 15 v ?40c t a +125c 30 v input bias current i b 15 60 pa ?40c t a +85c 35 125 pa ?40c t a +125c 0.7 1.0 na input offset current i os 20 70 pa ?40c t a +125c 400 pa input voltage range 0 5 v ?40c t a +125c 0.2 4.8 v common-mode rejection ratio cmrr v cm = 0 v to 5 v 115 135 db ?40c t a +125c, v cm = 0.2 v to 4.8 v 100 130 db large signal voltage gain a vo r l = 10 k, v o = 0.1 v to 4.9 v 110 130 db ?40c t a +125c 110 125 db offset voltage drift v os / t ?40c t a +125c 0.03 0.1 v/c output characteristics output voltage high v oh r l = 100 k to ground 4.99 4.994 v ?40c t a +125c, r l = 100 k to ground 4.98 v r l = 10 k to ground 4.95 4.97 v ?40c t a +125c, r l = 10 k to ground 4.94 v output voltage low v ol r l = 100 k to v+ 5 7 mv ?40c t a +125c, r l = 100 k to v+ 6 8 mv r l = 10 k to v+ 20 25 mv ?40c t a +125c, r l = 10 k to v+ 24 30 mv short-circuit limit i sc 25 ma power supply power supply rejection ratio psrr v s = 2.7 v to 5.0 v 105 125 db ?40c t a +125c 100 125 db supply current/amplifier i sy i o = 0 170 210 a ?40c t a +125c 225 a dynamic performance slew rate sr r l =10 k 0.4 v/s settling time 0.01% t s g = 1, 2 v step, c l = 20 pf, r l = 1 k 10 s overload recovery time 0.05 ms gain bandwidth product gbp 430 khz phase margin ? m r l = 10 k, r l = 100 k, c l = 20 pf 65 degrees noise performance voltage noise e n p-p f = 0.1 hz to 10 hz 1.2 v p-p voltage noise density e n f = 1 khz 52 nv/ hz
ad8538/AD8539 rev. a | page 6 of 24 @ v s = 2.7 v, v cm = 1.35 v, v o = 1.35 v, t a = 25c, unless otherwise specified. table 4. parameter symbol conditions min typ max unit input characteristics offset voltage v os 5 16 v ?40c t a +125c 30 v input bias current i b 15 25 pa ?40c t a +85c 35 125 pa ?40c t a +125c 0.7 1.0 na input offset current i os 20 50 pa ?40c t a +125c 300 pa input voltage range 0 2.7 v ?40c t a +125c 0.2 2.5 common-mode rejection ratio cmrr v cm = 0 v to 2.7 v 110 130 db ?40c t a +125c, v cm = 0.2 v to 2.5 v 100 125 db large signal voltage gain a vo r l = 10 k, v o = 0.1 v to 2.6 v 110 130 db ?40c t a +125c 105 125 db offset voltage drift v os / t ?40c t a +125c 0.03 0.1 v/c output characteristics output voltage high v oh r l = 100 k to ground 2.68 2.693 v ?40c t a +125c, r l = 100 k to ground 2.68 v r l = 10 k to ground 2.67 2.68 v ?40c t a +125c, r l = 10 k to ground 2.66 v output voltage low v ol r l = 100 k to v+ 5 7 mv ?40c t a +125c, r l = 100 k to v+ 6 8 mv r l = 10 k to v+ 14 20 mv ?40c t a +125c, r l = 10 k to v+ 20 25 mv short-circuit limit i sc 8 ma power supply power supply rejection ratio psrr v s = 2.7 v to 5.5 v 105 125 db ?40c t a +125c 100 125 db supply current/amplifier i sy i o = 0 210 a ?40c t a +125c 225 a dynamic performance slew rate sr r l = 10 k 0.35 v/s settling time 0.01% t s g = 1, 1 v step, c l = 20 pf, r l = 8 s overload recovery time 0.05 ms gain bandwidth product gbp 430 khz phase margin ? m r l = 10 k, r l = 100 k, c l = 20 pf 65 degrees noise performance voltage noise e n p-p f = 0.1 hz to 10 hz 2.0 v p-p voltage noise density e n f = 1 khz 55 nv/ hz
ad8538/AD8539 rev. a | page 7 of 24 absolute maximum ratings t = 25c, unless otherwise noted. thermal resistance a table 5. ja parameter rating is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. supply voltage +6 v table 6. thermal characteristics input voltage v ? 0.3 v to v + 0.3 v ss dd package type unit differential input voltage 6 v ja jc 5-lead tsot-23 (uj-5) 207 61 c/w output short-circuit duration to gnd observe derating curve storage temperature range C65c to +150c lead temperature (soldering, 60 sec) 300c operating temperature range C40c to +125c junction temperature range ?65c to +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. absolute maximum ratings apply at 25c, unless otherwise noted. 8-lead soic_n (r-8) 125 43 c/w 8-lead msop (rm-8) 145 45 c/w esd caution
ad8538/AD8539 rev. a | page 8 of 24 typical performance characteristics ad8538 characteristics ad8538 only, v = 5 v or 2.5 v, unless otherwise noted. sy 700 0 100 200 300 400 500 600 25 45 65 85 105 125 06741-006 temperature (c) input bias current (pa) v sy = 5v and 2.7v 450 0 ?10.0 06741-003 input offset voltage (v) number of amplifiers 50 100 150 200 250 300 350 400 v sy = 5v 0v < v cm < 5v t a = 25c ?8.4 ?6.8 ?5.2 ?3.6 ?2.0 ?0.4 1.2 2.8 4.4 6.0 7.6 9.2 figure 5. ad8538 input offset voltage distribution figure 8. ad8538 input bias current vs. temperature 14 0 0 0.096 06741-004 tcv os (v/c) number of amplifiers 2 4 6 8 10 12 0.012 0.024 0.036 0.048 0.060 0.072 0.084 v sy = 5v ?40c < t a < +125c 160 0 05 06741-007 supply voltage (v) supply current (a) 20 40 60 80 100 120 140 1234 t a = 25c figure 9. ad8538 supply current vs. supply voltage figure 6. ad8538 input offset voltage drift distribution 10 ?10 05 06741-005 input common-mode voltage (v) input offset voltage (v) ?8 ?6 ?4 ?2 0 2 4 6 8 1234 v sy = 5v t a = 25c 200 0 50 100 150 ?40 10 60 110 06741-008 temperature (c) supply current (a) v sy = 5v v sy = 2.7v figure 7. ad8538 input offset voltage vs. input common-mode voltage figure 10. ad8538 supply current vs. temperature
ad8538/AD8539 rev. a | page 9 of 24 70 ?20 ?10 0 10 30 40 50 60 20 ?45 0 45 90 1k 10k 100k 1m 06741-012 frequency (hz) open-loop gain (db) open-loop phase shift (degrees) v sy = 2.5v and 1.35v r l = 100k ? c l = 20pf 135 m 10000 0.01 0.1 1 10 100 1000 0.001 10 1 0.1 0.01 06741-009 load current (ma) output saturation voltage (mv) v sy ? v oh v sy = 5v t a = 25c source sink v ol figure 11. ad8538 output saturation voltage vs. load current figure 14. ad8538 open-loop gain and phase vs. frequency 120 0 100 1m 06741-013 frequency (hz) cmrr (db) 20 40 60 80 100 1k 10k 100k v sy = 5v and 2.7v t a = 25c 35 0 5 10 15 20 25 30 ?40 ?25 ?10 5 20 35 50 65 80 95 110 125 06741-010 temperature (c) output saturation voltage (mv) v sy ? v oh v sy = 5v r l = 10k ? v ol figure 12. ad8538 output saturation voltage vs. temperature figure 15. ad8538 cmrr vs. frequency 100 0 100 1m 06741-014 frequency (hz) psrr (db) 20 40 60 80 1k 10k 100k v sy = 2.5v and 1.35v t a = 25c +psrr ?psrr 60 ?20 1k 10k 100k 1m 06741-011 frequency (hz) closed-loop gain (db) 0 20 40 v sy = 5v and 2.7v c l = 20pf r l = 2k ? a v = 10 a v = 100 a v = 1 figure 16. ad8538 psrr vs. frequency figure 13. ad8538 closed-loop gain vs. frequency
ad8538/AD8539 rev. a | page 10 of 24 time (4s/div) voltage (1v/div) 06741-017 v sy = 5v a v = 1 c l = 300pf r l = 10k ? 1000 0.01 1 0.1 10 100 100 1k 10k 100k 1m 06741-022 frequency (hz) output impedance ( ? ) v sy = 5v and 2.7v a v = 1 a v = 10 a v = 100 figure 20. ad8538 large signal transient response figure 17. ad8538 closed-loop output impedance vs. frequency time (10s/div) 06741-018 v sy = 5v a v =?50 v out (v) v in (mv) 100 0 0 ?2.5 60 0 1 1000 06741-015 load capacitance (pf) small signal overshoot (%) 10 20 30 40 50 10 100 v sy = 5v t a = 25c r l = 2k ? os+ os? figure 21. ad8538 positive overload recovery figure 18. ad8538 small signal overshoot vs. load capacitance time (10s/div) v out (v) v in (mv) 06741-019 v sy = 5v a v =?50 0 ?100 2.5 0 time (4s/div) voltage (50mv/div) 06741-016 v sy = 5v and 2.7v a v = 1 c l = 300pf r l = 2k ? figure 22. ad8538 negative overload recovery figure 19. ad8538 small signal transient response
ad8538/AD8539 rev. a | page 11 of 24 time (200s/div) voltage (1v/div) 06741-023 v sy = 5v a v = 1 v in = 6v p-p r l = 10k ? v out v in 1000 10 100 10 100 1k 10k 06741-021 frequency (hz) voltage noise density (nv/ hz) v sy = 5v t a = 25c figure 25. ad8538 no phase reversal figure 23. ad8538 voltage noise density time (1s/div) voltage (500nv/div) 06741-020 v sy = 5v and 2.7v figure 24. ad8538 0.1 hz to 10 hz input voltage noise
ad8538/AD8539 rev. a | page 12 of 24 v = 2.7 v or 1.35 v, ad8538 only, unless otherwise noted. sy 10000 0.1 0.001 1 06741-027 load current (ma) output saturation voltage (mv) 1 10 100 1000 0.01 0.1 sink source v sy = 2.7v t a = 25c 180 0 06741-024 input offset voltage (v) number of amplifiers 20 40 60 80 100 120 140 160 ?10.0 ?8.4 ?6.8 ?5.2 ?3.6 ?2.0 ?0.4 1.2 2.8 4.4 6.0 7.6 9.2 v sy = 2.7v 0v < v cm < 2.7v t a = 25c figure 26. ad8538 input offset voltage distribution figure 29. ad8538 output saturation voltage vs. load current 35 0 06741-025 tcv os (v/c) number of amplifiers 5 10 15 20 25 30 0 0.012 0.024 0.036 0.048 0.060 0.072 0.084 0.096 v sy = 2.7v ?40c < t a < +125c 30 0 ?40 125 06741-028 temperature (c) output saturation voltage (mv) 5 10 15 20 25 ?25?105 203550658095110 v sy = 2.7v r l = 10k ? v sy = voh vol figure 30. ad8538 output saturation voltage vs. temperature figure 27. ad8538 input offset voltage drift distribution 10 ?10 02 06741-026 input common-mode voltage (v) input offset voltage (v) . 5 ?8 ?6 ?4 ?2 0 2 4 6 8 0.5 1.0 1.5 2.0 v sy = 2.7v t a = 25c 80 0 1 1000 06741-029 load capacitance (pf) small signal overshoot (%) 10 20 30 40 50 60 70 10 100 os+ os? v sy = 2.7v t a = 25c r l = 2k ? figure 31. ad8538 small signal overshoot vs. load capacitance figure 28. ad8538 input offset voltage vs. input common-mode voltage
ad8538/AD8539 rev. a | page 13 of 24 time (4s/div) voltage (500mv/div) 06741-030 v sy = 2.7v a v = 1 c l = 100pf r l = 10k ? 1000 10 100 10 100 1k 10k 100k 06741-032 frequency (hz) voltage noise density (nv/ hz) v sy = 2.7v t a = 25c figure 32. ad8538 large signal transient response figure 33. ad8538 voltage noise density
ad8538/AD8539 rev. a | page 14 of 24 AD8539 characteristics AD8539 only, v s = 5 v or 2.5 v, unless otherwise noted. 06741-035 ?10 ?9 ?8 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 2 3 4 5 6 7 8 9 10 v os (v) 800 700 600 500 400 300 200 100 0 number of amplifiers AD8539 v sy = 5v 0 < v cm < 5v t a = 25c 5 25 45 65 85 105 125 temperature (c) 1000.0 100.0 10.0 1.0 0.1 0.01 input bias current (pa) 06741-038 AD8539 v sy = 5v figure 34. AD8539 input offset voltage distribution figure 37. AD8539 input bias current vs. temperature 0 0.016 0.032 0.048 0.064 0.080 0.096 tcv os (v) 60 50 40 30 20 10 0 number of amplifiers AD8539 v sy = 2.5v ?40c < v cm < 125c 06741-036 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 v sy (v) 400 350 300 250 200 150 100 50 0 i sy (a) AD8539 v sy = 0v to 5v ?40c < t a < +125c 06741-039 +125c ?40c +85c +25c figure 35. AD8539 input offset voltage drift distribution figure 38. AD8539 supply current vs. supply voltage 20 10 0 ?10 ?20 v os (v) 012345 v cm (v) 06741-037 AD8539 v sy = 5v 0v < v cm < 5v t a = 25c ?40 ?25 ?10 5 20 35 50 65 80 95 110 125 temperature (c) 400 375 350 325 300 275 250 225 200 i sy (a) AD8539 v sy = 2.5v v sy = 1.35v 06741-040 figure 39. AD8539 supply current vs. temperature figure 36. AD8539 input offset voltage vs. input common-mode voltage
ad8538/AD8539 rev. a | page 15 of 24 06741-044 120 100 80 60 40 20 0 ?20 ?40 ?60 ?80 ?100 ?120 gain (degrees) 120 100 80 60 40 20 0 ?20 ?40 ?60 ?80 ?100 ?120 phase (degrees) 1k 10k 100k 1m 10m frequency (hz) AD8539 v sy = 2.5v r l = 2k ? c l = 20pf 06741-041 AD8539 10000 1000 100 10 1 0.1 output saturation voltage (mv) 0.001 0.01 0.1 1 10 100 i load (ma) sink, v s = 1.35v source, v s = 2.5v source, v s = 1.35v sink, v s = 2.5v figure 40. AD8539 output saturation voltage vs. load current figure 43. AD8539 open-loop gain and phase vs. frequency 06741-045 140 120 100 80 60 40 20 0 cmrr (db) 100 1k 10k 100k 1m 10m frequency (hz) channel b channel a AD8539 v sy = 2.5v 35 30 25 20 15 10 5 0 output saturation voltage (mv) ?40 ?25 ?10 5 20 35 50 65 80 95 110 125 temperature (c) 06741-042 AD8539 v s = 5v v dd - v oh , i l = 250a, r l = 10k ? v dd - v oh , i l = 25a, r l = 100k ? v ol , i l = 250a, r l = 10k ? v ol , i l = 25a, r l = 100k ? figure 44. AD8539 cmrr vs. frequency figure 41. AD8539 output saturation voltage vs. temperature 06741-043 60 40 20 0 ?20 ?40 closed-loop gain (db) 100 1k 10k 100k 1m 10m frequency (hz) a v = 100 a v = 10 a v = 1 AD8539 v sy = 2.5v r l = 2k ? c l = 20pf 06741-046 120 100 80 60 40 20 0 ?20 psrr (db) 100 1k 10k 100k 1m 10m frequency (hz) psrr? AD8539 v sy = 2.5v psrr+ figure 45. AD8539 psrr vs. frequency figure 42. AD8539 closed-loop gain vs. frequency
ad8538/AD8539 rev. a | page 16 of 24 06741-050 time (4s/div) voltage (1v/div) AD8539 v sy = 5v a v = 1 c l = 300pf r l = 10k ? 06741-047 1000 900 800 700 600 500 400 300 200 100 0.01 z out ( ? ) 100 1k 10k 100k 1m 10m frequency (hz) AD8539 v sy = 2.5v a v = 100 a v = 10 a v = 1 figure 46. AD8539 closed-loop output impedance vs. frequency figure 49. AD8539 large signal transient response 06741-048 60 50 40 30 20 10 0 overshoot (%) 1 10 100 1k capacitance (pf) os? os+ AD8539 v sy = 2.5v r l = 2k ? 06741-051 input voltage output voltage AD8539 v sy = 2.5v a v = ?50 0.15 0.10 0.05 0 ?0.05 ?0.10 ?0.15 ?0.20 ?0.25 input voltage (50mv/div) 5 4 3 2 1 0 ?1 ?2 ?3 output voltage (1v/div) time (20s/div) figure 50. AD8539 positive overload recovery figure 47. AD8539 small signal overshoot vs. load capacitance 06741-049 time (2s/div) voltage (50mv/div) AD8539 v sy = 5v a v = 1 c l = 300pf r l = 2k ? 06741-052 input voltage output voltage AD8539 v sy = 2.5v a v = ?50 0.05 0 ?0.05 ?0.10 ?0.15 ?0.20 ?0.25 ?0.30 ?0.35 input voltage (50mv/div) 7.5 6.5 5.5 4.5 3.5 2.5 1.5 0.5 ?0.5 output voltage (5v/div) time (20s/div) figure 48. AD8539 small signal transient response figure 51. AD8539 negative overload recovery
ad8538/AD8539 rev. a | page 17 of 24 06741-055 input voltage output voltage AD8539 v sy = 2.5v a v = 1 r l = 10k ? voltage (2v/div) time (200s/div) 06741-053 1k 100 10 100 1k 10k 100k frequency (hz) AD8539 v sy = 2.5v voltage noise density (nv hz) figure 52. AD8539 voltage noise density figure 54. AD8539 no phase reversal 0.8 0.6 0.4 0.2 0 ?0.2 ?0.4 ?0.6 ?0.8 voltage (200mv/div) ?5 ?4 ?3 ?2 ?1 0 1 2 3 4 5 time (1s/div) AD8539 v sy = 5v a v = 1m 06741-054 06741-056 0 ?20 ?40 100 1k 10k 100k frequency (hz) channel separation (db) ?60 ?80 ?100 ?120 ?140 ?160 AD8539 v sy = 2.5v figure 55. AD8539 channel separation vs. frequency figure 53. AD8539 0.1 hz to 10 hz input voltage noise
ad8538/AD8539 rev. a | page 18 of 24 v = 2.7 v or 1.35 v, t = 25c, AD8539 only, unless otherwise noted. s a 06741-057 ?10 ?9 ?8 ?7 ?6 ?5 ?4 ?3 ?2 ?1 0 1 2 3 4 5 6 7 8 9 10 v os 350 300 250 200 150 100 50 0 number of amplifiers AD8539 v sy = 2.7v 0v < v cm < 2.7v t a = 25c 06741-060 ?40 ?25 ?10 5 20 35 50 65 80 95 110 125 temperature (c) 35 30 25 20 15 10 5 0 output saturation voltage (mv) AD8539 v sy = 2.7v v dd ? v oh , r l = 10k ? v dd ? v oh , r l = 100k ? v ol , r l = 10k ? v ol , r l = 100k ? figure 56. AD8539 input offset voltage distribution figure 59. AD8539 output saturation voltage vs. temperature 0 0.016 0.032 0.048 0.064 0.080 0.096 tcv os (v) 45 40 35 30 25 20 15 10 5 0 number of amplifiers 06741-058 AD8539 v sy = 1.35v ?40c < t a < +125c 06741-061 60 70 80 50 40 30 20 10 0 overshoot (%) 1 10 100 1k capacitance (pf) os+ AD8539 v sy = 1.35v r l = 2k ? os? figure 57. AD8539 input offset voltage drift distribution figure 60. AD8539 small signal overshoot vs. load capacitance 06741-062 time (4s/div) voltage (500mv/div) AD8539 v sy = 1.35v a v = 1 c l = 300pf r l = 10k ? 20 15 10 5 0 ?5 ?10 ?15 ?20 v os (v) 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 v cm (v) AD8539 v sy = 2.7v 0v < v cm < 2.7v t a = 25c 06741-059 figure 61. AD8539 large signal transient response figure 58. AD8539 input offset voltage vs. input common-mode voltage
ad8538/AD8539 rev. a | page 19 of 24 06741-063 1k 100 10 100 1k 10k 100k frequency (hz) AD8539 v sy = 1.35v voltage noise density (nv/ hz) 06741-064 0 ?20 ?40 100 1k 10k 100k frequency (hz) channel separation (db) ?60 ?80 ?100 ?120 ?140 ?160 AD8539 v sy = 1.35v figure 62. AD8539 voltage noise density figure 63. AD8539 channel separation vs. frequency
ad8538/AD8539 rev. a | page 20 of 24 outline dimensions * compliant to jedec standards mo-193-ab with the exception of package height and thickness. pin 1 1.60 bsc 2.80 bsc 1.90 bsc 0.95 bsc 0.20 0.08 0.60 0.45 0.30 8 4 0 0.50 0.30 0.10 max seating plane * 1.00 max * 0.90 0.87 0.84 2.90 bsc 54 12 3 figure 64. 5-lead thin small outline transistor package [tsot-23] (uj-5) dimensions shown in millimeters 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-a a 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 65. 8-lead standard small outline package [soic_n] narrow body (r-8) dimensions shown in millimeters and (inches)
ad8538/AD8539 rev. a | page 21 of 24 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 figure 66. 8-lead mini small outline package [msop] (rm-8) dimensions shown in millimeters ordering guide model temperature range package description package option branding ad8538aujz-r2 ?40c to +125c 5-lead tsot-23 uj-5 a0c 1 ad8538aujz-reel ?40c to +125c 5-lead tsot-23 uj-5 a0c 1 ad8538aujz-reel7 ?40c to +125c 5-lead tsot-23 uj-5 a0c 1 ad8538arz ?40c to +125c 8-lead soic_n r-8 1 ad8538arz-reel ?40c to +125c 8-lead soic_n r-8 1 ad8538arz-reel7 ?40c to +125c 8-lead soic_n r-8 1 AD8539armz-r2 ?40c to +125c 8-lead msop rm-8 a1s 1 AD8539armz-reel ?40c to +125c 8-lead msop rm-8 a1s 1 AD8539arz ?40c to +125c 8-lead soic_n r-8 1 AD8539arz-reel ?40c to +125c 8-lead soic_n r-8 1 AD8539arz-reel7 ?40c to +125c 8-lead soic_n r-8 1 1 z = rohs compliant part.
ad8538/AD8539 rev. a | page 22 of 24 notes
ad8538/AD8539 rev. a | page 23 of 24 notes
ad8538/AD8539 rev. a | page 24 of 24 notes ?2005C2007 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d06741-0-5/07(a)

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