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single 0.275% comparator and reference with dual polarity outputs adcmp361 rev. 0 information furnished by analog devices is believed to be accurate and reliable. however, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. specifications subject to change without notice. no license is granted by implication or otherwise under any patent or patent rights of analog devices. trademarks and registered trademarks are the property of their respective owners. one technology way, p.o. box 9106, norwood, ma 02062-9106, u.s.a. tel: 781.329.4700 www.analog.com fax: 781.461.3113 ?2007 analog devices, inc. all rights reserved. features 400 mv 0.275% threshold supply range: 1.7 v to 5.5 v low quiescent current: 6.5 a typical input range includes ground internal hysteresis: 9.3 mv typical low input bias current: 5 na maximum dual open-drain outputs small sot-23 package applications li-ion monitoring threshold detectors relay driving optoisolator driving industrial control systems handheld instruments functional block diagram in out out v dd gnd 400mv adcmp361 06496-001 figure 1. general description the adcmp361 is a single low power, high accuracy compara- tor with a 400 mv reference in a 5-lead sot-23 package. the internal 400 mv reference provides the ability to monitor low voltage supplies. the device operates on a supply voltage from 1.7 v to 5.5 v and only draws 6.5 a typical, making it suitable for low power system monitoring and portable applications. hysteresis is included in the comparators. there are dual open-drain outputs to enable the comparator and reference circuit to be used in an inverting or noninverting configuration. the outputs can be pulled to any voltage up to a maximum of 5.5 v. the output stage is guaranteed to sink greater than 5 ma over temperature the device is suitable for portable, commercial, industrial, and automotive applications. in out adcmp361 gnd out r1 4.7m ? r2 1m ? r3 1m ? + + ? v dd 3v li-ion cell c1 100nf 06496-029 400mv figure 2. typical li-ion monitoring application 2.280v 2.271v charging discharging v batt v out 06496-030 figure 3. li-ion monitoring waveforms
adcmp361 rev. 0 | page 2 of 12 table of contents features .............................................................................................. 1 applications....................................................................................... 1 functional block diagram .............................................................. 1 general description ......................................................................... 1 revision history ............................................................................... 2 specifications..................................................................................... 3 absolute maximum ratings............................................................ 4 thermal characteristics .............................................................. 4 esd caution.................................................................................. 4 pin configuration and function descriptions............................. 5 typical performance characteristics ..............................................6 application information................................................................ 11 comparators and internal reference ...................................... 11 power supply............................................................................... 11 inputs ........................................................................................... 11 outputs ........................................................................................ 11 adding hysteresis....................................................................... 11 outline dimensions ....................................................................... 12 ordering guide .......................................................................... 12 revision history 2/07revision 0: initial version
adcmp361 rev. 0 | page 3 of 12 specifications v dd = 1.7 v to 5.5 v, ?40c t a +125c, unless otherwise noted. table 1. parameter min typ max unit test conditions/comments thresholds 1 rising input threshold voltage 399.3 400.4 401.5 mv v dd = 3.3 v, t a = 25c 391.2 400.4 407.7 mv v dd = 1.7 v 393.1 400.4 405.9 mv v dd = 3.3 v 393.1 400.4 405.8 mv v dd = 5.5 v falling input threshold voltage 381.1 391.1 400.9 mv v dd = 1.7 v 381.2 391.1 398.4 mv v dd = 3.3 v 381.0 391.1 398.2 mv v dd = 5.5 v hysteresis = v th(r) C v th(f) 2 9.3 13.5 mv threshold voltage accuracy 0.275 % t a = 25c, v dd = 3.3 v threshold voltage temperature coefficient 16 ppm/c power supply supply current 6.5 9 a v dd = 1.7 v 7.0 10 a v dd = 5.5 v input characteristics input bias current 0.01 5 na v dd = 1.7 v, v in = v dd 0.01 5 na v dd = 1.7 v, v in = 0.1 v open-drain outputs output low voltage 2 140 220 mv v dd = 1.7 v, i out = 3 ma 140 220 mv v dd = 5.5 v, i out = 5 ma output leakage current 3 0.01 1 a v dd = 1.7 v, v out = v dd 0.01 1 a v dd = 1.7 v, v out = 5.5 v dynamic performance high-to-low propagation delay 2 , 4 10 s v dd = 5 v, v ol = 400 mv low-to-high propagation delay 2 , 4 8 s v dd = 5 v, v oh = 0.9 v dd output rise time 2 , 4 0.5 s v dd = 5 v, v o = (0.1 to 0.9) v dd output fall time 2 , 4 0.07 s v dd = 5 v, v o = (0.1 to 0.9) v dd 1 r l = 100 k, v o = 2 v swing. 2 10 mv input overdrive. 3 v in = 40 mv overdrive. 4 r l = 10 k.
adcmp361 rev. 0 | page 4 of 12 absolute maximum ratings table 2. parameter rating v dd ?0.3 v to +6 v in ?0.3 v to +6 v out, out ?0.3 v to +6 v operating temperature range ?40c to +125c storage temperature range ?65c to +150c lead temperature soldering (10 sec) 300c vapor phase (60 sec) 215c infrared (15 sec) 220c 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 characteristics ja is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. table 3. thermal resistance package type ja unit 5-lead sot-23 240 c/w esd caution
adcmp361 rev. 0 | page 5 of 12 pin configuration and fu nction descriptions 1 out 5 out 2 gnd 3 in 4 v dd adcmp361 top view (not to scale) 06496-002 figure 4. pin configuration table 4. pin function descriptions pin o. nemonic description 1 out noninverting open-drain output. 2 gnd ground. 3 in monitors analog input voltage on comparator. the othe r input of the comparator is connected to a 400 mv reference. 4 v dd power supply. 5 out inverting open-drain output.
adcmp361 rev. 0 | page 6 of 12 typical performance characteristics 0 10 20 30 40 50 percent of units (%) rising input threshold voltage (mv) 60 394 395 396 397 398 399 400 401 402 403 404 405 406 0 6496-003 v dd = 5v t a = 25c figure 5. distribution of rising input threshold voltage 0 5 10 15 20 25 30 percent of units (%) hysteresis (mv) 35 6.0 6.4 6.8 7.2 7.6 8.0 8.4 8.8 9.2 9.6 10.0 10.4 10.8 0 6496-004 v dd = 5v t a = 25c figure 6. distribution of hysteresis 395 rising input threshold voltage (mv) supply voltage (v) 401 400 399 398 397 396 1.7 5.7 5.2 4.7 4.2 3.7 3.2 2.7 2.2 t a = ?40c t a = +25c t a = +85c t a = +125c 06496-007 figure 7. rising input threshold voltage vs. supply voltage 0 10 20 30 40 percent of units (%) falling input threshold voltage (mv) 50 388 389 390 391 392 393 394 395 396 397 398 399 400 06496-006 v dd = 5v t a = 25c figure 8. distribution of falling input threshold voltage 396 rising input threshold voltage (mv) temperature (c) 404 402 400 398 ?40 ?20 120 0 20406080100 4 3 2 1 06496-005 four typical parts v dd = 5v figure 9. rising input threshold voltage vs. temperature 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 10.5 11.0 11.5 hysteresis (mv) temperature (c) 12.0 ?40 ?20 120 0 20406080100 0 6496-010 v dd = 5.0v v dd = 3.3v v dd = 2.5v v dd = 1.8v figure 10. hysteresis vs. temperature
adcmp361 rev. 0 | page 7 of 12 4 5 6 7 8 9 10 11 hysteresis (mv) supply voltage (v) 12 1.7 5.7 5.2 4.7 4.2 3.7 3.2 2.7 2.2 t a = +125c t a = +25c t a = +85c t a = ?40c 0 6496-008 figure 11. hysteresis vs. supply voltage 10 4 5.2 supply current (ma) supply voltage (v) 9 8 7 6 5 1.72.22.73.23.74.24.7 t a = +125c t a = +85c t a = +25c t a = ?40c 06496-009 no load current figure 12. quiescent supply current vs. supply voltage 1 supply current (a) output sink current (ma) 1000 100 10 0.001 100 10 1 0.1 0.01 t a = ?40c v dd = 5.0v v dd = 3.3v v dd = 2.5v v dd = 1.7v 0 6496-013 figure 13. supply current vs. output sink current ?5 threshold shift (mv) supply voltage (v) 1 1.5 2.52.42.32.22.12.01.9 1.8 1.71.6 06496-011 t a = +125c t a = +85c t a = +25c t a = ?40c 0 ?1 ?2 ?3 ?4 figure 14. minimum supply voltage 50 0 1.5 supply current (a) supply voltage (v) 40 30 20 10 00 . 51 . 0 06496-012 t a = +125c t a = +85c t a = +25c t a = ?40c figure 15. start-up supply current 1 supply current (a) output sink current (ma) 1000 100 10 0.001 100 10 1 0.1 0.01 v dd = 5.0v v dd = 3.3v v dd = 2.5v v dd = 1.7v t a = 25c 06496-014 figure 16. supply current vs. output sink current
adcmp361 rev. 0 | page 8 of 12 1 supply current (a) output sink current (ma) 1000 100 10 0.001 100 10 1 0.1 0.01 v dd = 5.0v v dd = 3.3v v dd = 2.5v v dd = 1.7v t a = 85c 06496-015 figure 17. supply current vs. output sink current ?7 1.0 input bias current (na) input voltage (v) ?3 ?5 00 . 2 0 . 6 ?1 3 1 0.4 0.8 t a = +125c t a = +85c t a = +25c t a = ?40c 06496-017 current is positive going into the device. v dd = 5v 0v < v ib < 1v figure 18. low level input bias current 1 output saturation voltage (mv) output sink current (ma) 100 10 0.001 0.1 0.01 1000 10 1 v dd = 5.0v v dd = 3.3v v dd = 2.5v v dd = 1.8v 0 6496-019 t a = 25c figure 19. output saturation voltage vs. output sink current 0.1 0 input bias current (na) input voltage (v) 1k 10k 100 10 1 ?0.3 ?0.2 ?0.1 t a = +125c t a = +85c t a = +25c t a = ?40c 06496-016 current is going out of the device. v dd = 5v ?0.3v < v ib < 0v figure 20. below ground input bias current 0.01 5 input bias current (na) input voltage (v) 1 0.1 12 4 10 3 t a = ?40c 06496-018 t a = +125c t a = +85c t a = +25c current is going into the device v dd = 5v v ib > 1v figure 21. high level input bias current 1 output saturation voltage (mv) output sink current (ma) 100 10 0.001 0.1 1000 10 0.01 1 v dd = 5.0v t a = ?40c v dd = 3.3v v dd = 2.5v v dd = 1.8v 06496-020 figure 22. output saturation voltage vs. output sink current
adcmp361 rev. 0 | page 9 of 12 1 output saturation voltage (mv) output sink current (ma) 100 10 0.001 0.1 1000 10 0.01 1 v dd = 5.0v v dd = 3.3v v dd = 2.5v v dd = 1.8v 06496-021 t a = 85c figure 23. output saturation voltage vs. output sink current 0 short-circuit current (ma) output voltage (v) 40 20 02 70 4 60 30 10 50 v dd = 5.0v v dd = 3.3v v dd = 2.5v v dd = 1.8v 06496-023 t a = 25c figure 24. short-circuit current vs. output voltage 0 propagation delay (s) input overdrive (mv) 0 204060 60 50 40 30 20 10 80 100 0 6496-025 lh noninv lh inv hl noninv hl inv t a = 25c figure 25. propagation delay vs. input overdrive 0 short-circuit current (ma) output voltage (v) 40 20 02 80 4 60 30 10 70 50 t a = +85c t a = +25c 0 6496-022 t a = +125c t a = ?40c v dd = 5v figure 26. short-circuit current vs. output voltage 0.001 output leakage current (na) output voltage (v) 0.01 0123 10 45 1 0.1 06496-024 t a = +125c t a = +85c t a = +25c t a = ?40c v dd = 5v figure 27. output leakage current vs. output voltage 0.01 rise and fall times (s) output pull-up resistor (k ? ) 1 0.1 1 100 10 10 0.1 100 1000 rise fall 06496-027 v dd = 5v c l = 20pf t a = 25c figure 28. rise and fall times vs. output pull-up resistor
adcmp361 rev. 0 | page 10 of 12 ch1 50.0mv ch3 5.00v ch2 5.00v m20.0s ch1 7mv 2 3 1 v in (+ina, ?inb) non inv (outa) inv (outb) 06496-026 figure 29. noninverting and inverting comparators propagation delay
adcmp361 rev. 0 | page 11 of 12 application information the adcmp361 is a low power comparator and reference circuit featuring a 400 mv reference that operates from 1.7 v to 5.5 v. the comparator is 0.275% accurate with a built-in hysteresis of 9.3 mv. there are two outputs, one the inverse of the other. this enables the adcmp361 to be used as an inverting or a noninverting comparator circuit. these open- drain outputs are capable of sinking 40 ma. comparators and internal reference the comparator has one input available externally; the other comparator input is connected internally to the 400 mv reference. the rising input threshold voltage of the comparators is designed to be equal to that of the reference. power supply the adcmp361 is designed to operate from 1.7 v to 5.5 v. a 100 nf decoupling capacitor is recommended between v dd and gnd. inputs the comparator input is limited to the maximum v dd voltage range. the voltage on these inputs can be above v dd but never above the maximum allowed v dd voltage. when adding a resistor string to the input, care must be taken when choosing resistor values. this is due to the fact that the input bias current will be in parallel with the bottom resistor, r2, of the input resistor divider string. this bottom resistor must therefore be chosen carefully in order to reduce the error introduced by this bias current (see figure 30 ). outputs the open-drain comparator outputs are limited to the maximum specified v dd voltage range, regardless of the v dd voltage. these outputs are capable of sinking up 40 ma. adding hysteresis to prevent oscillations at the output caused by noise or slowly moving signals passing the switching threshold, each compara- tor has built-in hysteresis of approximately 9.3 mv. positive feedback can be used to increase hysteresis. out in adcmp361 400mv gnd out v in r1 r2 i bias v dd 0 6496-028 figure 30. input bias current effect on input resistor string
adcmp361 rev. 0 | page 12 of 12 outline dimensions pin 1 1.60 bsc 2.80 bsc 1.90 bsc 0.95 bsc 5 12 3 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-a a figure 31. 5-lead small outline transistor package [sot-23] (rj-5) dimensions shown in millimeters ordering guide model temperature range package description package option branding adcmp361yrjz-reel7 1 C40c to +125c 5-lead sot-23 rj-5 m99 1 z = pb-free part. ?2007 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d06496-0-2/07(0)

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