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low power, precision, auto - zero op amps data sheet ad8538 / ad8539 rev. b document feedback 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 ? 2005 C 2013 analog devices, inc. all rights reserved. technical support www.analog.com 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 qualified for automotive applications applications mobi le 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 c urrent, and low power consumption. the supply current is less than 2 1 5 a maximu m 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 th ese 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 pac kages , and the ad8539 amplifier is available in 8 - lead, narrow body soic and 8 - lead msop. see the ordering guide for the automotive part. pin configurations out 1 v? 2 +in 3 v+ 5 ?in 4 ad8538 t o p 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 t op 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 t o p 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 t o p view (not to scale) 06741-034 figure 4. 8 - lead msop (rm - 8)
ad8538/ad8539 data sheet rev. b | page 2 of 24 table of contents features .............................................................................................. 1 applications ....................................................................................... 1 general description ......................................................................... 1 pin configuration diagrams ........................................................... 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 2 / 13 rev. a t o rev. b changes to features section and general description section ... 1 updated outline dimensions ....................................................... 20 change s to ordering guide .......................................................... 21 added automotive products section ........................................... 21 5 /07 rev. 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 s ection, renumbered figures sequentially ..................................................................................... 14 updated outline dimensions ....................................................... 20 changes to ordering guide .......................................................... 21 10/05 revision 0: initial version
data sheet ad8538/ad8539 rev. b | 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 noi se density e n f = 1 khz 50 nv/ hz
ad8538/ad8539 data sheet rev. b | 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 ra tio 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 outp ut 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
data sheet ad8538/ad8539 rev. b | page 5 of 24 ad8539 electrical specifica tions @ 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 characteristic s offset voltage v os 5 1 5 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 7 0 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 1 3 5 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 1 2 5 db offset voltage dri ft ? 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 4.99 4 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+ 2 4 30 mv short - circuit limit i sc 25 ma power suppl y 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 s ettling 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 data sheet rev. b | 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 cha racteristics 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 2.69 3 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 sup ply 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
data sheet ad8538/ad8539 rev. b | page 7 of 24 absolute maximum ratings t a = 25c, unless otherwise noted. table 5. parameter rating supply voltage +6 v input voltage v ss ? 0.3 v to v dd + 0.3 v differential input voltage 6 v 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. thermal resistance ja is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. table 6. thermal characteristics package type ja jc unit 5-lead tsot-23 (uj-5) 207 61 c/w 8-lead soic_n (r-8) 125 43 c/w 8-lead msop (rm-8) 145 45 c/w esd caution
ad8538/ad8539 data sheet rev. b | page 8 of 24 typical performance characteristics ad8538 characteristi cs ad8538 only, v sy = 5 v or 2.5 v, unless otherwise noted. 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 = 25 c ? 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 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 ?40 c < t a < +125 c figure 6. ad8538 input offset voltage drift distribution 10 ? 10 0 5 06741-005 input common-mode voltage (v) input offset voltage ( v) ? 8 ? 6 ? 4 ? 2 0 2 4 6 8 1 2 3 4 v sy = 5v t a = 25 c figure 7. ad8538 input offset voltage vs. input common - mode voltage 700 0 100 200 300 400 500 600 25 45 65 85 105 125 06741-006 temper a ture ( c) input bias current (pa) v sy = 5v and 2.7v figure 8. ad8538 input bias current vs. temperature 160 0 0 5 06741-007 supply voltage (v) supply current ( a) 20 40 60 80 100 120 140 1 2 3 4 t a = 25 c figure 9. ad8538 supply current vs. supply voltage 200 0 50 100 150 ?40 10 60 1 10 06741-008 temper a ture ( c) supp l y current ( a) v sy = 5v v sy = 2.7v figure 10 . ad8538 supply current vs. temperature
data sheet ad8538/ad8539 rev. b | page 9 of 24 10000 0.01 0.1 1 10 100 1000 0.001 10 1 0.1 0.01 06741-009 load current (ma) output s a tur a tion vo lt age (mv) v sy ? v oh v sy = 5v t a = 25c source sink v ol figure 11 . ad8538 output saturation voltage vs. load current 35 0 5 10 15 20 25 30 ?40 ?25 ?10 5 20 35 50 65 80 95 1 10 125 06741-010 temper a ture ( c ) output s a tur a tion vo lt age (mv) v sy ? v oh v sy = 5v r l = 10k? v ol figure 12 . ad8538 output saturation voltage vs. temperature 60 ? 20 1k 10k 100k 1m 06741-0 1 1 frequenc y (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 13 . ad8538 closed - loop gain vs. frequency 70 ?20 ?10 0 10 30 40 50 60 20 ?45 0 45 90 1k 10k 100k 1m 06741-012 frequenc y (hz) open-loo p gain (db) open-loo p phase shift (degrees) v sy = 2.5v and 1.35v r l = 100k? c l = 20pf 135 m figure 14 . ad8538 open - loop gain and phase vs. frequency 120 0 100 1m 06741-013 frequenc y (hz) cmrr (db) 20 40 60 80 100 1k 10k 100k v sy = 5v and 2.7v t a = 25 c figure 15 . ad8538 cmrr vs. frequency 100 0 100 1m 06741-014 frequenc y (hz) psrr (db) 20 40 60 80 1k 10k 100k v sy = 2. 5v and 1.35 v t a = 25 c +psrr ? psrr figure 16 . ad8538 psrr vs. frequency
ad8538/ad8539 data sheet rev. b | page 10 of 24 1000 0.01 1 0.1 10 100 100 1k 10k 100k 1m 06741-022 frequenc y (hz) output impedance ( ? ) v sy = 5v and 2.7v a v = 1 a v = 10 a v = 100 figure 17 . ad8538 closed - loop output impedance vs. frequency 60 0 1 1000 06741-015 load capacitance (pf) small signal overshoot (%) 10 20 30 40 50 10 100 v sy = 5v t a = 25 c r l = 2k? os+ os ? figure 18 . ad8538 small signal overshoot vs. load capacitance time (4 s/div ) volt age (50mv/div) 06741-016 v sy = 5v and 2.7v a v = 1 c l = 300pf r l = 2k ? figure 19 . ad8538 small signal transient response time (4 s/div ) vo lt age (1v/div) 06741-017 v sy = 5v a v = 1 c l = 300pf r l = 10k ? figure 20 . ad8538 large signal transient response time (10 s/div ) 06741-018 v sy = 5v a v = ?50 v out (v) v in (mv) 100 0 0 ?2.5 figure 21 . ad8538 positiv e overload recovery time (10 s/div ) v out (v) v in (mv) 06741-019 v sy = 5v a v = ?50 0 ?100 2.5 0 figure 22 . ad8538 negative overload recovery
data sheet ad8538/ad8539 rev. b | page 11 of 24 1000 10 100 10 100 1k 10k 06741-021 frequenc y (hz) vo lt age noise densit y (nv/ hz ) v sy = 5v t a = 25 c figure 23 . ad8538 voltage noise density time (1 s/div ) vo lt age (500nv/div) 06741-020 v sy = 5v and 2.7v figure 24 . ad8538 0.1 hz to 10 hz input voltage noise time (200 s/div ) vo lt age (1v/div) 06741-023 v sy = 5v a v = 1 v in = 6v p-p r l = 10k ? v out v in figur e 25 . ad8538 no phase reversal
ad8538/ad8539 data sheet rev. b | page 12 of 24 v s y = 2.7 v or 1.35 v , ad8538 only, unless otherwise noted. 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 = 25 c figure 26 . ad8538 input offset voltage distribution 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 figure 27 . ad8538 input offset voltage drift distribution 10 ? 10 0 2.5 06741-026 input common-mode voltage (v) input offset voltage ( v) ? 8 ? 6 ? 4 ? 2 0 2 4 6 8 0.5 1.0 1.5 2.0 v sy = 2.7v t a = 25 c figure 28 . ad853 8 input offset voltage vs. input common - mode voltage 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 = 25 c figure 29 . ad8538 output saturation voltage vs. load current 30 0 ? 40 125 06741-028 temperature ( c) output saturation voltage (mv) 5 10 15 20 25 ? 25 ? 10 5 20 35 50 65 80 95 110 v sy = 2.7v r l = 10k ? v sy = voh vo l figure 30 . ad8538 output saturation voltage vs. temperature 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
data sheet ad8538/ad8539 rev. b | page 13 of 24 time (4 s/div ) vo lt age (500mv/div) 06741-030 v sy = 2.7v a v = 1 c l = 100pf r l = 10k ? figure 32 . ad8538 large signal transient response 1000 10 100 10 100 1k 10k 100k 06741-032 frequenc y (hz) vo lt age noise densit y (nv/ hz ) v sy = 2.7v t a = 25 c figure 33 . ad8538 voltage noise density
ad8538/ad8539 data sheet rev. b | 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 figure 34. ad8539 input offset voltage distribution 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 figure 35. ad8539 input offset voltage drift distribution 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 figure 36. ad8539 input offset vo ltage vs. input common-mode voltage 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 37. ad8539 input bias current vs. temperature 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 38. ad8539 supply current vs. supply voltage ?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
data sheet ad8538/ad8539 rev. b | page 15 of 24 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 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 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 figure 42. ad8539 closed-loop gain vs. frequency 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 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 figure 44. ad8539 cmrr vs. frequency 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
ad8538/ad8539 data sheet rev. b | page 16 of 24 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 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? figure 47 . ad8539 small signal overshoot vs. load capaci tance 06741-049 time (2s/div) voltage (50mv/div) ad8539 v sy = 5v a v = 1 c l = 300pf r l = 2k? figure 48 . ad8539 small signal transient response 06741-050 time (4s/div) voltage (1v/div) ad8539 v sy = 5v a v = 1 c l = 300pf r l = 10k? figure 49 . ad8539 large signal transient response 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 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 51 . ad8539 negative overload recovery
data sheet ad8538/ad8539 rev. b | page 17 of 24 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 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 figure 53 . ad8539 0.1 hz to 10 hz input voltage noise 06741-055 input voltage output voltage ad8539 v sy = 2.5v a v = 1 r l = 10k? voltage (2v/div) time (200s/div) figure 54 . ad8539 n o phase reversal 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
ad8538/ad8539 data sheet rev. b | page 18 of 24 v s = 2.7 v or 1.35 v, t a = 25c, ad8539 only, unless otherwise noted. 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 figure 56. ad8539 input offset voltage distribution 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 figure 57. ad8539 input offset voltage drift distribution 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 58. ad8539 input offset vo ltage vs. input common-mode voltage 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 59. ad8539 output saturation voltage vs. temperature 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 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 ? figure 61. ad8539 large signal transient response
data sheet ad8538/ad8539 rev. b | 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) figure 62 . ad8539 voltage noise density 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 63 . ad8539 channel separation vs. frequency
ad8538/ad8539 data sheet rev. b | page 20 of 24 outline dimensions 100708-a * compliant to jedec standards mo-193-ab with the exception of package height and thickness. 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 * 1.00 max * 0.90 max 0.70 min 2.90 bsc 54 12 3 seating plane 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-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 65. 8-lead standard small outline package [soic_n] narrow body (r-8) dimensions shown in millimeters and (inches)
data sheet ad8538/ad8539 rev. b | page 21 of 24 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 66. 8-lead mini small outline package [msop] (rm-8) dimensions shown in millimeters ordering guide model 1, 2 temperature range package description package option branding ad8538aujz-r2 ?40c to +125c 5-lead tsot-23 uj-5 a0c ad8538aujz-reel ?40c to +125c 5-lead tsot-23 uj-5 a0c ad8538aujz-reel7 ?40c to +125c 5-lead tsot-23 uj-5 a0c ad8538waujz-r7 ?40c to +125c 5-lead tsot-23 uj-5 aoc ad8538arz ?40c to +125c 8-lead soic_n r-8 ad8538arz-reel ?40c to +125c 8-lead soic_n r-8 ad8538arz-reel7 ?40c to +125c 8-lead soic_n r-8 ad8539armz ?40c to +125c 8-lead msop rm-8 a1s AD8539ARMZ-REEL ?40c to +125c 8-lead msop rm-8 a1s ad8539arz ?40c to +125c 8-lead soic_n r-8 ad8539arz-reel ?40c to +125c 8-lead soic_n r-8 ad8539arz-reel7 ?40c to +125c 8-lead soic_n r-8 1 z = rohs compliant part. 2 w = qualified for auto motive applications. automotive products the ad8538w model is available with controlled manufacturing to support the quality and reliability requirements of automotive applications. note that this automotive model may have specifications that differ from the commercial models; therefore, design ers 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.
ad8538/ad8539 data sheet rev. b | page 22 of 24 notes
data sheet ad8538/ad8539 rev. b | page 23 of 24 notes
ad8538/ad8539 data sheet rev. b | page 24 of 24 notes ? 2005 C 2013 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of thei r respective owners. d06741 - 0- 2/13(b)

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