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dual low power 1.5% comparator with 400 mv reference ADCMP670 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 1.5% threshold supply range: 1.7 v to 5.5 v low quiescent current: 6.5 a typical input range includes ground internal hysteresis: 8.9 mv typical low input bias current: 10 na maximum open-drain outputs supports wire-and connections input polarities: one inverting and one noninverting low profile (1 mm) tsot package drop-in replacement for the lt6700-1 applications li-ion monitoring portable applications hand-held instruments window comparators led/relay driving optoisolator driving control systems functional block diagram +in a ?inb outa outb v dd gnd 400mv ADCMP670-1 06493-001 figure 1. general description the ADCMP670 consists of two low power, high accuracy, comparator and reference circuits in a 6-lead tsot 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 draws only 6.5 a typical, making it suitable for low power system monitoring and portable applica- tions. hysteresis is included in the comparators. the comparator outputs are open-drain and the output can be pulled up to any voltage up to 5.5 v. the output stage is guaranteed to sink greater than 5 ma over temperature. the ADCMP670 is currently available in one model, the ADCMP670-1. this model has one inverting input and one noninverting input, making it suitable for use as a window comparator. the device is suitable for portable, commercial, industrial, and automotive applications. 386 threshold voltage (mv) temperature (c) ?40 ?20 0 20 40 60 80 100 120 404 402 400 398 396 394 392 390 388 rising input falling input 2b 2a 1b 1a 06493-002 two typical parts comp a and comp b v dd = 5v figure 2. comparator thresholds vs. temperature
ADCMP670 rev. 0 | page 2 of 16 table of contents features .............................................................................................. 1 applications....................................................................................... 1 functional block diagram .............................................................. 1 general description ......................................................................... 1 revision history ............................................................................... 2 specifications..................................................................................... 3 absolute maximum ratings............................................................ 6 thermal resistance ...................................................................... 6 esd caution.................................................................................. 6 pin configuration and function descriptions............................. 7 typical performance characteristics ..............................................8 application information................................................................ 13 comparators and internal reference ...................................... 13 power supply............................................................................... 13 inputs ........................................................................................... 13 outputs ........................................................................................ 13 adding hysteresis....................................................................... 13 outline dimensions ....................................................................... 14 ordering guide .......................................................................... 14 revision history 2/07revision 0: initial version
ADCMP670 rev. 0 | page 3 of 16 specifications v dd = 1.7 v to 5.5 v, t a = 25c, unless otherwise noted. table 1. parameter min typ max unit test conditions/comments thresholds 1 rising input threshold voltage 394 400 406 mv v dd = 1.7 v 395 400 405 mv v dd = 5.5 v falling input threshold voltage 386 391.1 401 mv v dd = 1.7 v 387 391.1 400 mv v dd = 5.5 v hysteresis = v th(r) C v th(f) 7 8.9 11 mv input characteristics input bias current 0.01 10 na v dd = 1.7 v, v in = v dd 4 10 na v dd = 1.7 v, v in = 0.1 v open-dran outputs output low voltage 2 140 200 mv v dd = 1.7 v, i out = 3 ma 130 200 mv v dd = 5.5 v, i out = 5 ma output leakage current 3 0.01 0.8 a v dd =1.7 v, v out = v dd 0.01 0.8 a v dd =1.7 v, v out = 5.5 v dynamic performance 2 , 4 high-to-low propagation delay 10 s v dd = 5.5 v, v ol = 400 mv low-to-high propagation delay 8 s v dd = 5.5 v, v oh = 0.9 v dd output rise time 0.5 s v dd = 5.5 v, v o = (0.1 to 0.9) v dd output fall time 0.07 s v dd = 5.5 v, v o = (0.1 to 0.9) v dd power supply supply current 5 5.7 10 a v dd = 1.7 v 6.5 11 a v dd = 5.5 v 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. 5 no load current.
ADCMP670 rev. 0 | page 4 of 16 v dd = 1.7 v to 5.5 v, 0c t a 70c, unless otherwise noted. table 2. parameter min typ max unit test conditions/comments thresholds 1 rising input threshold voltage 391 409 mv v dd = 1.7 v 392.5 407.5 mv v dd = 5.5 v falling input threshold voltage 383.5 403.5 mv v dd = 1.7 v 384.5 402.5 mv v dd = 5.5 v hysteresis = v th(r) C v th(f) 6.5 12.5 mv input characteristics input bias current 15 na v dd = 1.7 v, v in = v dd 15 na v dd = 1.7 v, v in = 0.1 v open-drain outputs output low voltage 2 250 mv v dd = 1.7 v, i out = 3 ma 250 mv v dd = 5.5 v, i out = 5 ma output leakage current 3 1 a v dd =1.7 v, v out = v dd 1 a v dd =1.7 v, v out = 5.5 v power supply supply current 4 13 a v dd = 1.7 v 14 a v dd = 5.5 v 1 r l = 100 k, v o = 2 v swing. 2 10 mv input overdrive. 3 v in = 40 mv overdrive. 4 no load. v dd = 1.7 v to 5.5 v, ?40c t a 85c, unless otherwise noted. table 3. parameter min typ max unit test conditions/comments thresholds 1 rising input threshold voltage 390 410 mv v dd = 1.7 v 392 408 mv v dd = 5.5 v falling input threshold voltage 382.5 404.5 mv v dd = 1.7 v 383.5 403.5 mv v dd = 5.5 v hysteresis = v th(r) C v th(f) 5.5 13.0 mv input characteristics input bias current 15 na v dd = 1.7 v, v in = v dd 15 na v dd = 1.7 v, v in = 0.1 v open-drain outputs output low voltage 2 250 mv v dd = 1.7 v, i out = 3 ma 250 mv v dd = 5.5 v, i out = 5 ma output leakage current 3 1 a v dd =1.7 v, v out = v dd 1 a v dd =1.7 v, v out = 5.5 v power supply supply current 4 14 a v dd = 1.7 v 15 a v dd = 5.5 v 1 r l = 100 k, v o = 2 v swing. 2 10 mv input overdrive. 3 v in = 40 mv overdrive. 4 no load.
ADCMP670 rev. 0 | page 5 of 16 v dd = 1.7 v to 5.5 v, ?40c t a 125c, unless otherwise noted. table 4. parameter min typ max unit test conditions/comments thresholds 1 rising input threshold voltage 390 411 mv v dd = 1.7 v 392 410 mv v dd = 5.5 v falling input threshold voltage 381.5 405.5 mv v dd = 1.7 v 381.05 404.5 mv v dd = 5.5 v hysteresis = v th(r) C v th(f) 2 13.5 mv input characteristics input bias current 45 na v dd = 1.7 v, v in = v dd 45 na v dd = 1.7 v, v in = 0.1 v open-drain outputs output low voltage 2 250 mv v dd = 1.7 v, i out = 3 ma 250 mv v dd = 5.5 v, i out = 5 ma output leakage current 3 1 a v dd = 1.7 v, v out = v dd 1 a v dd = 1.7 v, v out = 5.5 v power supply supply current 4 16 a v dd = 1.7 v 17 a v dd = 5.5 v 1 r l = 100 k, v o = 2 v swing. 2 10 mv input overdrive. 3 v in = 40 mv overdrive. 4 no load.
ADCMP670 rev. 0 | page 6 of 16 absolute maximum ratings thermal resistance table 5. parameter range ja is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. v dd ?0.3 v to +6 v +ina, ?inb ?0.3 v to +6 v table 6. thermal resistance outa, outb ?0.3 v to +6 v package type ja unit output short circuit duration 1 indefinite 6-lead tsot 200 c/w input current ?10 ma operating temperature range ?40c to +125c esd caution storage temperature range ?65c to +150c lead temperature soldering (10 sec) 300c vapor phase (60 sec) 215c infrared (15 sec) 220c 1 when the output is shorted indefinitely, the use of a heat sink may be required to keep the junction temperature within the absolute maximum ratings. 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.
ADCMP670 rev. 0 | page 7 of 16 pin configuration and fu nction descriptions 1 outa 6 outb 2 gnd 5 v dd 3 +ina 4 ?inb ADCMP670-1 top view (not to scale) 06493-003 figure 3. pin configuration table 7. pin function descriptions pin no. mnemonic description 1 outa open-drain output for comparator a. 2 gnd ground. 3 +ina monitors analog input voltage on comparator a. connected to noninverting input. the other input of comparator a is connected to a 400 mv reference. 4 ?inb monitors analog input voltage on comparator b. connected to inverting input. the other input of comparator b is connected to a 400 mv reference. 5 v dd power supply pin. 6 outb open-drain output for comparator b.
ADCMP670 rev. 0 | page 8 of 16 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 06493-004 v dd = 5v t a = 25c 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 06493-007 v dd = 5v t a = 25c figure 4. distribution of rising input threshold voltage figure 7. distribution of falling 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 06493-005 v dd = 5v t a = 25c 398 rising input threshold voltage (mv) temperature (c) 402 401 400 399 ?40 ?20 120 0 20406080100 06493-008 v dd = 5.0v v dd = 3.3v v dd = 2.5v v dd = 1.8v figure 5. distribution of hysteresis figure 8. rising input threshold voltage vs. temperature 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 06493-009 396 rising input threshold voltage (mv) temperature (c) 404 402 400 398 ?40 ?20 120 0 20406080100 4 3 2 1 06493-006 four typical parts v dd = 5v figure 6. rising input threshold voltage vs. temperature figure 9. rising input threshold voltage vs. supply voltage
ADCMP670 rev. 0 | page 9 of 16 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 2b 2a 1b 1a 06493-010 four typical parts v dd = 5v 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 06493-013 v dd = 5.0v v dd = 3.3v v dd = 2.5v v dd = 1.8v figure 10. hysteresis vs. temperature figure 13. hysteresis vs. temperature 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 06493-011 ?5 threshold shift (mv) supply voltage (v) 1 1.5 2.52.42.32.22.12.01.91.8 1.7 1.6 06493-014 t a = +125c t a = +85c t a = +25c t a = ?40c 0 ?1 ?2 ?3 ?4 figure 11. hysteresis vs. supply voltage figure 14. minimum supply voltage 50 0 1.5 supply current (a) supply voltage (v) 40 30 20 10 00 . 51 . 0 06493-015 t a = +125c t a = +85c t a = +25c t a = ?40c 10 4 5.2 supply current (ma) supply voltage (v) 9 8 7 6 5 1.7 2.2 2.7 3.2 3.7 4.2 4.7 t a = +125c t a = +85c t a = +25c t a = ?40c 06493-012 no load current figure 15. start -u p supply current figure 12. quiescent supply current vs. supply voltage
ADCMP670 rev. 0 | page 10 of 16 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 06493-016 figure 16. supply current vs. output sink 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 = 85c 06493-018 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 06493-020 current is positive going into the device. v dd = 5v 0v < v ib < 1v figure 18. low level input bias 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 06493-017 figure 19. supply current 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 06493-019 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 06493-021 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
ADCMP670 rev. 0 | page 11 of 16 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 06493-022 t a = 25c 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 06493-023 figure 22. output saturation voltage vs. output sink current figure 25. output saturation voltage vs. output sink 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 v dd = 3.3v v dd = 2.5v v dd = 1.8v 06493-024 t a = 85c 0 short-circuit current (ma) output voltage (v) 40 20 02 80 4 60 30 10 70 50 t a = +85c t a = +25c 06493-025 t a = +125c t a = ?40c v dd = 5v figure 23. output saturation voltage vs. output sink current figure 26. output short-circuit 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 06493-026 t a = 25c 0.001 output leakage current (na) output voltage (v) 0.01 0123 10 45 1 0.1 06493-027 t a = +125c t a = +85c t a = +25c t a = ?40c v dd = 5v figure 24. output short-circuit current figure 27. output leakage current
ADCMP670 rev. 0 | page 12 of 16 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 06493-030 v dd = 5v c l = 20pf t a = 25c 0 propagation delay (s) input overdrive (mv) 0 204060 60 50 40 30 20 10 80 100 06493-028 lh noninv lh inv hl noninv hl inv t a = 25c figure 28. propagation delay vs. input overdrive figure 30. rise and fall times vs. output pull-up resistor 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) 06493-029 figure 29. noninverting and inverting comparators propagation delay
ADCMP670 rev. 0 | page 13 of 16 application information the ADCMP670 is a dual low power comparator with a built-in 400 mv reference that operates from 1.7 v to 5.5 v. the comparator is 1.5% accurate with a built-in hysteresis of 8.9 mv. the outputs are open-drain, capable of sinking 40 ma. comparators and internal reference each comparator has one input available externally. comparator a has a noninverting input and comparator b has an inverting input available. the other comparator inputs are 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 ADCMP670 is designed to operate from 1.7 v to 5.5 v. a 0.1 f decoupling capacitor is recommended between v dd and gnd. inputs the comparator inputs are 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 of the string. this bottom resistor must therefore be chosen first to control the error introduced by this bias current. outputs the comparator outputs are open-drain and are also limited to the maximum specified v dd voltage range, regardless of the v dd voltage. these outputs are capable of sinking up to 40 ma. outputs can be tied together to provide a window comparator with a single output. adding hysteresis to prevent oscillations at the output caused by noise or slowly moving signals passing the switching threshold, each comparator has built-in hysteresis of approximately 8.9 mv. positive feedback can be used to increase hysteresis to the noninverting comparator.
ADCMP670 rev. 0 | page 14 of 16 outline dimensions 13 45 2 6 2.90 bsc 1.60 bsc 2.80 bsc 1.90 bsc 0.95 bsc 0.20 0.08 8 4 0 0.50 0.30 0.10 max * 0.90 0.87 0.84 seating plane * 1.00 max 0.60 0.45 0.30 pin 1 indicato r * compliant to jedec standards mo-193-aa with the exception of package height and thickness. figure 31 . 6-lead thin small outline transistor package [tsot] (uj-6) dimensions shown in millimeters ordering guide model temperature range package description package option branding ADCMP670-1yujz-rl7 C40c to +125c 6-lead thin small outlin e transistor package [tsot] uj-6 m97 1 1 z = pb-free part.
ADCMP670 rev. 0 | page 15 of 16 notes
ADCMP670 rev. 0 | page 16 of 16 notes ?2007 analog devices, inc. all rights reserved. trademarks and registered trademarks are the property of their respective owners. d06493-0-2/07(0)

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