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general description the max9117?ax9120 nanopower comparators in space-saving sc70 packages feature beyond-the- rails inputs and are guaranteed to operate down to +1.6v. the max9117/max9118 feature an on-board 1.252v ?.75% reference and draw an ultra-low supply current of only 600na, while the max9119/max9120 (without reference) require just 350na of supply current. these features make the max9117?ax9120 family of comparators ideal for all 2-cell battery-monitoring/man- agement applications. the unique design of the output stage limits supply-cur- rent surges while switching, virtually eliminating the sup- ply glitches typical of many other comparators. this design also minimizes overall power consumption under dynamic conditions. the max9117/max9119 have a push-pull output stage that sinks and sources current. large internal-output drivers allow rail-to-rail output swing with loads up to 5ma. the max9118/max9120 have an open-drain output stage that makes them suit- able for mixed-voltage system design. all devices are available in the ultra-small 5-pin sc70 package. applications 2-cell battery monitoring/management ultra-low-power systems mobile communications notebooks and pdas threshold detectors/discriminators sensing at ground or supply line telemetry and remote systems medical instruments features ? space-saving sc70 package (half the size of sot23) ? ultra-low supply current 350na per comparator (max9119/max9120) 600na per comparator with reference (max9117/max9118) ? guaranteed to operate down to +1.6v ? internal 1.252v ?.75% reference (max9117/max9118) ? input voltage range extends 200mv beyond-the-rails ? cmos push-pull output with ?ma drive capability (max9117/max9119) ? open-drain output versions available (max9118/max9120) ? crowbar-current-free switching ? internal hysteresis for clean switching ? no phase reversal for overdriven inputs max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference ________________________________________________________________ maxim integrated products 1 v ee in- (ref) in+ 1 5 v cc out max9117 max9118 max9119 max9120 sc70 top view 2 3 4 ( ) are for max9117/max9118. in- (ref) n.c. v ee 1 8 n.c. n.c. max9117 max9120 so 2 in+ 3 v cc 7 out 6 4 5 typical application circuit appears at end of data sheet. pin configurations selector guide ordering information beyond-the-rails is a trademark of maxim integrated products, inc. 19-1862; rev 4; 1/07 part internal reference output type supply current (na) max9117 yes push-pull 600 max9118 yes open-drain 600 350 push-pull no max9119 max9120 no open-drain 350 part pin- package top mark pkg code max9117 exk-t 5 sc70-5 abw x5-1 max9117esa+ 8 so s8-2 max9118 exk-t 5 sc70-5 abx x5-1 max9119 exk-t 5 sc70-5 aby x5-1 max9120 exk-t 5 sc70-5 abz x5-1 max9120esa+ 8 so s8-2 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. note: all devices specified for over -40? to +85? operating temperature range. + denotes lead-free package.
max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics?ax9117/max9118 (with ref) (v cc = +5v, v ee = 0v, v in+ = v ref , t a = -40? to +85?, unless otherwise noted. typical values are at t a = +25?.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. supply voltage (v cc to v ee )..................................................+6v voltage inputs (in+, in-, ref) .........(v ee - 0.3v) to (v cc + 0.3v) output voltage max9117/max9119 ....................(v ee - 0.3v) to (v cc + 0.3v) max9118/max9120 ..................................(v ee - 0.3v) to +6v current into input pins......................................................?0ma output current..................................................................?0ma output short-circuit duration .................................................10s continuous power dissipation (t a = +70?) 5-pin sc70 (derate 2.5mw/? above +70?) .............200mw 8-pin so (derate 5.88mw/? above +70?)...............471mw operating temperature range ...........................-40? to +85? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? parameter symbol conditions min typ max units t a = +25c 1.6 5.5 supply voltage range v cc inferred from the psrr test t a = t min to t max 1.8 5.5 v v cc = 1.6v t a = +25c 0.60 1 t a = +25c 0.68 1.3 supply current i cc v cc = 5v t a = t min to t max 1.6 ? in+ voltage range v in+ inferred from output swing test v ee - 0.2 v cc + 0.2 v t a = +25c 1 5 input offset voltage v os (note 2) t a = t min to t max 10 mv input-referred hysteresis v hb (note 3) 4 mv t a = +25c 0.15 1 input bias current i b t a = t min to t max 2 na v cc = 1.6v to 5.5v, t a = +25c 0.1 1 power-supply rejection ratio psrr v cc = 1.8v to 5.5v, t a = t min to t max 1 mv/v t a = +25c 190 400 max9117, v cc = 5v, i source = 5ma t a = t min to t max 500 v cc = 1.6v, t a = +25c 100 200 output voltage swing high v cc - v oh max9117, i source = 1ma v cc = 1.8v, t a = t min to t max 300 mv t a = +25c 190 400 v cc = 5v, i sink = 5ma t a = t min to t max 500 v cc = 1.6v, t a = +25c 100 200 output voltage swing low v ol i sink = 1ma v cc = 1.8v, t a = t min to t max 300 mv output leakage current i leak max9118 only, v o = 5.5v 0.002 1 ? v cc = 5v 35 sourcing, v o = v ee v cc = 1.6v 3 v cc = 5v 35 output short-circuit current i sc sinking, v o = v cc v cc = 1.6v 3 ma v cc = 1.6v 16 high-to-low propagation delay (note 4) t pd - v cc = 5v 14 ?
max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference _______________________________________________________________________________________ 3 electrical characteristics?ax9119/max9120 (without ref) (v cc = +5v, v ee = 0v, v cm = 0v, t a = -40? to +85?, unless otherwise noted. typical values are at t a = +25?.) (note 1) electrical characteristics?ax9117/max9118 (with ref) (continued) (v cc = +5v, v ee = 0v, v in+ = v ref , t a = -40? to +85?, unless otherwise noted. typical values are at t a = +25?.) (note 1) parameter symbol conditions min typ max units v cc = 1.6v 15 max9117 only v cc = 5v 40 v cc = 1.6v, r pullup = 100k ? 16 low-to-high propagation delay (note 4) t pd+ max9118 only v cc = 5v, r pullup = 100k ? 45 ? rise time t rise max9117 only, c l = 15pf 1.6 ? fall time t fall c l = 15pf 0.2 ? power-up time t on 1.2 ms t a = +25c 1.230 1.252 1.274 reference voltage v ref t a = t min to t max 1.196 1.308 v reference voltage temperature coefficient tc ref 100 pp m/ ? bw = 10hz to 100khz 1.1 reference output voltage noise e n bw = 10hz to 100khz, c ref = 1nf 0.2 mv rms reference line regulation ? v ref / ? v cc v cc = 1.6v to 5.5v 0.25 mv/v reference load regulation ? v ref / ? i out ? i out = 10na ? mv/ na parameter symbol conditions min typ max units t a = +25 c 1.6 5.5 supply voltage range v cc inferred from the psrr test t a = t min to t max 1.8 5.5 v v cc = 1.6v, t a = +25 c 0.35 0.80 t a = +25 c 0.45 0.80 supply current i cc v cc = 5v t a = t min to t max 1.2 ? input common-mode voltage range v cm inferred from the cmrr test v ee - 0.2 v cc + 0.2 v t a = +25 c15 input offset voltage v os -0.2v v cm (v cc + 0.2v) (note 2) t a = t min to t max 10 mv input-referred hysteresis v hb -0.2v v cm (v cc + 0.2v) (note 3) 4 mv t a = +25 c 0.15 1 input bias current i b t a = t min to t max 2 na input offset current i os 75 pa v cc = 1.6v to 5.5v, t a = +25 c 0.1 1 power-supply rejection ratio psrr v cc = 1.8v to 5.5v, t a = t min to t max 1 mv/v common-mode rejection ratio cmrr (v ee - 0.2v) v cm (v cc + 0.2v) 0.5 3 mv/v
max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference 4 _______________________________________________________________________________________ electrical characteristics?ax9119/max9120 (without ref) (continued) (v cc = +5v, v ee = 0v, v cm = 0v, t a = -40? to +85?, unless otherwise noted. typical values are at t a = +25?.) (note 1) note 1: all specifications are 100% tested at t a = +25?. specification limits over temperature (t a = t min to t max ) are guaranteed by design, not production tested. note 2: v os is defined as the center of the hysteresis band at the input. note 3: the hysteresis-related trip points are defined as the edges of the hysteresis band, measured with respect to the center of the band (i.e., v os ) (figure 2). note 4: specified with an input overdrive (v overdrive ) of 100mv, and load capacitance of c l = 15pf. v overdrive is defined above and beyond the offset voltage and hysteresis of the comparator input. for the max9117/max9118, reference voltage error should also be added. parameter symbol conditions min typ max units t a = +25 c 190 400 max9119 only, v cc = 5v, i source = 5ma t a = t min to t max 500 v cc = 1.6v, t a = +25 c 100 200 output voltage swing high v cc - v oh max9119 only, i source = 1ma v cc = 1.8v, t a = t min to t max 300 mv t a = +25 c 190 400 v cc = 5v, i sink = 5ma t a = t min to t max 500 v cc = 1.6v, t a = +25 c 100 200 output voltage swing low v ol i sink = 1ma v cc = 1.8v, t a = t min to t max 300 mv output leakage current i leak max9120 only, v o = 5.5v 0.001 1a v cc = 5v 35 sourcing, v o = v ee v cc = 1.6v 3 v cc = 5v 35 output short-circuit current i sc sourcing, v o = v cc v cc = 1.6v 3 ma v cc = 1.6v 16 high-to-low propagation delay (note 4) t pd- v cc = 5v 14 ? v cc = 1.6v 15 max9119 only v cc = 5v 40 v cc = 1.6v, r pullup = 100k ? 16 low-to-high propagation delay (note 4) t pd+ max9120 only v cc = 5v, r pullup = 100k ? 45 ? rise time t rise max9119 only, c l = 15pf 1.6 ? fall time t fall c l = 15pf 0.2 ? power-up time t on 1.2 ms
500 600 550 650 700 750 800 900 850 950 1.5 2.5 2.0 3.0 3.5 4.0 4.5 5.0 5.5 max9117/max9118 supply current vs. supply voltage and temperature max9117-20 toc01 supply voltage (v) supply current (na) t a = +85 c t a = +25 c t a = -40 c 250 300 350 400 450 500 550 1.5 2.5 2.0 3.0 3.5 4.0 4.5 5.0 5.5 max9119/max9120 supply current vs. supply voltage and temperature max9117-20 toc02 supply voltage (v) supply current (na) t a = +85 c t a = +25 c t a = -40 c 550 650 600 750 700 850 800 900 -40 10 -15 356085 max9117/max9118 supply current vs. temperature max9117-20 toc03 temperature ( c) supply current (na) v cc = +3v v cc = +5v v cc = +1.8v 250 350 300 450 400 500 550 -40 10 -15 35 60 85 max9119/max9120 supply current vs. temperature max9117-20 toc04 temperature ( c) supply current (na) v cc = +3v v cc = +5v v cc = +1.8v 0 300 200 100 400 500 600 700 023 1 456 910 output voltage low vs. sink current max9117-20 toc07 sink current (ma) v ol (mv) 78 v cc = +1.8v v cc = +5v v cc = +3v 35 0 1 10 100 1k 10k 100k max9117/max9118 supply current vs. output transition frequency 10 max9117-20 toc05 output transition frequency (hz) supply current ( a) 25 30 5 15 20 v cc = +1.8v v cc = +5v v cc = +3v 35 0 1 10 100 1k 10k 100k max9119/max9120 supply current vs. output transition frequency 10 max9117-20 toc06 output transition frequency (hz) supply current ( a) 25 30 5 15 20 v cc = +1.8v v cc = +5v v cc = +3v 0 100 200 300 400 500 600 0246810 output voltage low vs. sink current and temperature max9117-20 toc08 sink current (ma) v ol (mv) 3 1579 t a = +85 c t a = +25 c t a = -40 c 0 0.2 0.1 0.4 0.3 0.6 0.5 0.7 04 268 15 37910 max9117/max9119 output voltage high vs. source current max9117-20 toc09 source current (ma) v cc - v oh (v) v cc = +1.8v v cc = +5v v cc = +3v max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference _______________________________________________________________________________________ 5 typical operating characteristics (v cc = +5v, v ee = 0v, c l = 15pf, v overdrive = 100mv, t a = +25?, unless otherwise noted.)
typical operating characteristics (continued) (v cc = +5v, v ee = 0v, c l = 15pf, v overdrive = 100mv, t a = +25?, unless otherwise noted.) max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference 6 _______________________________________________________________________________________ 0 0.2 0.1 0.4 0.3 0.6 0.5 04 268 15 37910 max9117/max9119 output voltage high vs. source current and temperature max9117-20 toc10 source current (ma) v cc - v oh (v) t a = +85 c t a = +25 c t a = -40 c 0 5 10 15 20 25 30 35 40 -40 -15 10 35 60 85 short-circuit sink current vs. temperature max9117-20 toc11 temperature ( c) sink current (ma) v cc = +1.8v v cc = +5v v cc = +3v 0 5 10 15 20 25 30 35 40 -40 -15 10 35 60 85 max9117/max9119 short-circuit source current vs. temperature max9117-20 toc12 temperature ( c) source current (ma) v cc = +1.8v v cc = +3v v cc = +5v 45 50 0.2 0.5 0.4 0.3 0.6 0.7 0.8 0.9 1.0 1.1 1.2 -40 10 -15 356085 max9117-20 toc13 temperature ( c) v os (mv) v cc = +3v v cc = +5v v cc = +1.8v offset voltage vs. temperature 3.0 4.0 3.5 5.5 5.0 4.5 6.0 -40 10 -15 35 60 85 hysteresis voltage vs. temperature max9117-20 toc14 temperature ( c) v hb (mv) 1.240 1.244 1.242 1.248 1.246 1.250 1.252 1.254 1.256 1.258 1.260 -40 10 -15 356085 max9117/max9118 reference voltage vs. temperature max9117-20 toc15 temperature ( c) reference voltage (v) v cc = +3v v cc = +5v v cc = +1.8v 1.249 1.250 1.251 1.252 1.253 1.254 1.5 2.5 3.5 4.5 2.0 3.0 4.0 5.0 5.5 max9117/max9118 reference voltage vs. supply voltage max9117-20 toc16 supply voltage (v) reference voltage (v) 1.240 1.242 1.244 1.246 1.248 1.250 1.252 1.254 1.256 1.258 1.260 045 23 1 678910 max9117/max9118 reference output voltage vs. reference source current max9117-20 toc17 source current (na) reference voltage (v) v cc = +5v v cc = +1.8v, +3v 1.240 1.242 1.244 1.246 1.248 1.250 1.252 1.254 1.256 1.258 1.260 045 23 1 678910 max9117/max9118 reference output voltage vs. reference sink current max9117-20 toc18 sink current (na) reference voltage (v) v cc = +3v v cc = +5v v cc = +1.8v
typical operating characteristics (continued) (v cc = +5v, v ee = 0v, c l = 15pf, v overdrive = 100mv, t a = +25?, unless otherwise noted.) max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference _______________________________________________________________________________________ 7 10 30 20 50 40 70 60 80 020 10 30 40 50 max9117-20 toc23 input overdrive (mv) t pd- ( s) propagation delay (t pd- ) vs. input overdrive v cc = +3v v cc = +5v v cc = +1.8v 0 5 10 15 20 25 30 35 40 0 1020304050 max9117-20 toc24 input overdrive (mv) t pd+ ( s) v cc = +5v v cc = +3v v cc = +1.8v max9117/max9119 propagation delay (t pd+ ) vs. input overdrive 10 100 1000 10,000 max9118/max9120 propagation delay (t pd- ) vs. pullup resistance max9117-20 toc25 r pullup (k ? ) t pd- ( s) 15 9 10 11 12 13 14 v cc = +5v v cc = +1.8v v cc = +3v 10 100 1000 10,000 max9118/max9120 propagation delay (t pd+ ) vs. pullup resistance max9117-20 toc26 r pullup (k ? ) t pd+ ( s) 100 0 20 40 60 80 v cc = +5v v cc = +1.8v v cc = +3v in+ (50mv/div) out (2v/div) propagation delay (t pd- ) (v cc = +5v) 20 s/div max9117-20 toc27 ov ov 8 14 12 10 16 18 20 22 24 26 28 max9117-20 toc19 temperature ( c) t pd- ( s) propagation delay (t pd- ) vs. temperature -40 10 -15 356085 v cc = +1.8v v cc = +3v v cc = +5v 0 20 10 40 30 50 60 max9117-20 toc20 t pd+ ( s) max9117/max9119 propagation delay (t pd+ ) vs. temperature -40 10 -15 35 60 85 temperature ( c) v cc = +5v v cc = +1.8v v cc = +3v 200 0 0.01 0.1 1 10 100 1000 40 max9117-20 toc21 capacitive load (nf) t pd- ( s) 80 120 160 20 60 100 140 180 propagation delay (t pd- ) vs. capacitive load v cc = +5v v cc = +1.8v v cc = +3v 0.01 0.1 1 10 100 1000 max9117-20 toc22 capacitive load (nf) t pd+ ( s) max9117/max9119 propagation delay (t pd+ ) vs. capacitive load 0 40 20 100 80 60 140 160 120 180 v cc = +5v v cc = +1.8v v cc = +3v
typical operating characteristics (continued) (v cc = +5v, v ee = 0v, c l = 15pf, v overdrive = 100mv, t a = +25?, unless otherwise noted.) max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference 8 _______________________________________________________________________________________ in+ (50mv/div) out (1v/div) max9117/max9119 propagation delay (t pd+ ) (v cc = +1.8v) 20 s/div max9117-20 toc32 ov ov in+ (50mv/div) out (1v/div) max9117/max9119 10khz response (v cc = +1.8v) 20 s/div max9117-20 toc33 ov ov in+ (50mv/div) out (2v/div) max9117/max9119 1khz response (v cc = +5v) 200 s/div max9117-20 toc34 ov ov v cc (2v/div) out (2v/div) power-up/down response 40 s/div max9117-20 toc35 ov ov in+ (50mv/div) out (2v/div) propagation delay (t pd- ) (v cc = +3v) 20 s/div max9117-20 toc29 ov ov in+ (50mv/div) out (2v/div) max9117/max9119 propagation delay (t pd+ ) (v cc = +3v) 20 s/div max9117-20 toc30 ov ov in+ (50mv/div) out (1v/div) propagation delay (t pd- ) (v cc = +1.8v) 20 s/div max9117-20 toc31 ov ov in+ (50mv/div) out (2v/div) max9117/max9119 propagation delay (t pd+ ) (v cc = +5v) 20 s/div max9117-20 toc28 ov ov
max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference _______________________________________________________________________________________ 9 functional diagrams max9117 max9118 in+ out v cc v ee ref ref 1.252v max9119 max9120 in+ out v cc v ee in- detailed description the max9117/max9118 feature an on-board 1.252v ?.75% reference, yet draw an ultra-low supply current of 600na. the max9119/max9120 (without reference) consume just 350na of supply current. all four devices are guaranteed to operate down to +1.6v. their com- mon-mode input voltage range extends 200mv beyond-the-rails. internal hysteresis ensures clean out- put switching, even with slow-moving input signals. large internal output drivers allow rail-to-rail output swing with up to ?ma loads. the output stage employs a unique design that mini- mizes supply-current surges while switching, virtually eliminating the supply glitches typical of many other comparators. the max9117/max9119 have a push-pull output stage that sinks as well as sources current. the max9118/max9120 have an open-drain output stage that can be pulled beyond v cc to an absolute maxi- mum of 6v above v ee . these open-drain versions are ideal for implementing wire-or output logic functions. input stage circuitry the input common-mode voltage range extends from v ee - 0.2v to v cc + 0.2v. these comparators operate at any differential input voltage within these limits. input bias current is typically ?.15na if the input voltage is between the supply rails. comparator inputs are pro- tected from overvoltage by internal esd protection diodes connected to the supply rails. as the input volt- age exceeds the supply rails, these esd protection diodes become forward biased and begin to conduct. output stage circuitry the max9117?ax9120 contain a unique break- before-make output stage capable of rail-to-rail opera- tion with up to ?ma loads. many comparators consume orders of magnitude more current during switching than during steady-state operation. however, with this family of comparators, the supply-current change during an output transition is extremely small. in the typical operating characteristics , the supply current vs. output transition frequency graphs show the minimal supply-current increase as the output switching frequency approaches 1khz. this character- istic reduces the need for power-supply filter capaci- tors to reduce glitches created by comparator switching currents. in battery-powered applications, this characteristic results in a substantial increase in battery life. pin m a x9117/ m a x9118 m a x91 19/ m a x91 20 sc70 so sc 70 so name function 1 6 1 6 out comparator output 2424v ee negative supply 3 3 3 3 in+ comparator noninverting input 42 ref 1.252v reference 5757v cc positive supply 4 2 in- comparator inverting input 1, 5, 8 1, 5, 8 n.c. no connection. not internally connected. pin description
max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference 10 ______________________________________________________________________________________ reference (max9117/max9118) the internal reference in the max9117/max9118 has an output voltage of +1.252v with respect to v ee . its typical temperature coefficient is 100ppm/? over the full -40? to +85? temperature range. the reference is a pnp emitter-follower driven by a 120na current source (figure 1). the output impedance of the voltage refer- ence is typically 200k ? , preventing the reference from driving large loads. the reference can be bypassed with a low-leakage capacitor. the reference is stable for any capacitive load. for applications requiring a lower output impedance, buffer the reference with a low-input-leak- age op amp, such as the max4162. applications information low-voltage, low-power operation the max9117?ax9120 are ideally suited for use with most battery-powered systems. table 1 lists a variety of battery types, capacities, and approximate operating times for the max9117?ax9120, assuming nominal conditions. internal hysteresis many comparators oscillate in the linear region of oper- ation because of noise or undesired parasitic feed- back. this tends to occur when the voltage on one input is equal or very close to the voltage on the other input. the max9117?ax9120 have internal hysteresis to counter parasitic effects and noise. the hysteresis in a comparator creates two trip points: one for the rising input voltage (v thr ) and one for the falling input voltage (v thf ) (figure 2). the difference between the trip points is the hysteresis (v hb ). when the comparator? input voltages are equal, the hystere- sis effectively causes one comparator input to move quickly past the other, thus taking the input out of the region where oscillation occurs. figure 2 illustrates the case in which in- has a fixed voltage applied, and in+ is varied. if the inputs were reversed, the figure would be the same, except with an inverted output. additional hysteresis (max9117/max9119) the max9117/max9119 have a 4mv internal hysteresis band (v hb ). additional hysteresis can be generated with three resistors using positive feedback (figure 3). unfortunately, this method also slows hysteresis re- sponse time. use the following procedure to calculate resistor values. 1) select r3. leakage current at in is under 2na, so the current through r3 should be at least 0.2? to mini- mize errors caused by leakage current. the current through r3 at the trip point is (v ref - v out ) / r3. considering the two possible output states in solving for r3 yields two formulas: r3 = v ref / i r3 or r3 = (v cc - v ref ) / i r3 . use the smaller of the two result- ing resistor values. for example, when using the 120na ref v cc v ee v bias figure 1. max9117/max9118 voltage reference output equivalent circuit table 1. battery applications using max9117?ax9120 battery type rechargeable v fresh (v) v end-of-life (v) capacity, aa size (ma-h) max9117/max9118 operating time (hr) alkaline (2 cells) no 3.0 1.8 2000 2.5 x 10 6 nickel-cadmium (2 cells) yes 2.4 1.8 750 937,500 1.25 x 10 6 1000 2.7 3.5 yes lithium-ion (1 cell) nickel-metal- hydride (2 cells) yes 2.4 1.8 1000 1.25 x 10 6 max9119/max9120 operating time (hr) 5 x 10 6 1.875 x 10 6 2.5 x 10 6 2.5 x 10 6
max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference ______________________________________________________________________________________ 11 thresholds out in+ in- v hb hysteresis band v thf v thr figure 2. threshold hysteresis band v cc max9117 max9119 out r3 r1 r2 v ref v ee v in v cc figure 3. max9117/max9119 additional hysteresis max9117 (v ref = 1.252v) and v cc = +5v, and if we choose i r3 = 1?, then the two resistor values are 1.2m ? and 3.8m ? . choose a 1.2m ? standard value for r3. 2) choose the hysteresis band required (v hb ). for this example, choose 50mv. 3) calculate r1 according to the following equation: r1 = r3 (v hb / v cc ) for this example, insert the values: r1 = 1.2m ? (50mv / 5v) = 12k ? 4) choose the trip point for v in rising (v thr ) such that v thr > v ref ? (r1 + r3) / r3, (v thr is the trip point for v in rising). this is the threshold voltage at which the comparator switches its output from low to high as v in rises above the trip point. for this example, choose 3v. 5) calculate r2 as follows: r2 = 1 / [v thr / (v ref ? r1) - (1 / r1) - (1 / r3)] r2 = 1 / [3.0v / (1.252v ? 12k ? ) - (1 / 12k ? ) - (1 / 1.2m ? )] = 8.655k ? for this example, choose an 8.66k ? standard 1% value. 6) verify the trip voltages and hysteresis as follows: v in rising: v thr = v ref ? r1 [(1 / r1) + (1 / r2) + (1 / r3)] = 3v v in falling: v thf = v thr - (r1 ? v cc / r3) = 2.95v hysteresis = v thr - v thf = 50mv additional hysteresis (max9118/max9120) the max9118/max9120 have a 4mv internal hysteresis band. they have open-drain outputs and require an external pullup resistor (figure 4). additional hysteresis can be generated using positive feedback, but the for- mulas differ slightly from those of the max9117/ max9119. use the following procedure to calculate resistor values. 1) select r3 according to the formulas r3 = v ref / 1? or r3 = (v cc - v ref ) / 1? - r4. use the smaller of the two resulting resistor values. 2) choose the hysteresis band required (v hb ). 3) calculate r1 according to the following equation: r1 = (r3 + r4) (v hb / v cc ) 4) choose the trip point for v in rising (v thr ) (v thr is the trip point for v in rising). this is the threshold volt- age at which the comparator switches its output from low to high as v in rises above the trip point. 5) calculate r2 as follows: 6) verify the trip voltages and hysteresis as follows: hysteresis = v thr - v thf v falling vvr rr rr r rr v in thf ref cc : = ++ + ? ? ? ? ? ? + ? 1 1 1 1 2 1 34 1 34 vri g v v r rr r in thr ref sin : = ++ ? ? ? ? ? ? 1 1 1 1 2 1 3 r v vrrr thr ref 21 1 1 1 1 3 = ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? /
max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference 12 ______________________________________________________________________________________ board layout and bypassing power-supply bypass capacitors are not typically needed, but use 100nf bypass capacitors close to the device? supply pins when supply impedance is high, supply leads are long, or excessive noise is expected on the supply lines. minimize signal trace lengths to reduce stray capacitance. a ground plane and sur- face-mount components are recommended. if the ref pin is decoupled, use a new low-leakage capacitor. zero-crossing detector figure 5 shows a zero-crossing detector application. the max9119? inverting input is connected to ground, and its noninverting input is connected to a 100mv p-p signal source. as the signal at the noninverting input crosses 0v, the comparator? output changes state. logic-level translator the typical application circuit shows an application that converts 5v logic to 3v logic levels. the max9120 is powered by the +5v supply voltage, and the pullup resistor for the max9120? open-drain output is con- nected to the +3v supply voltage. this configuration allows the full 5v logic swing without creating overvolt- age on the 3v logic inputs. for 3v to 5v logic-level translations, simply connect the +3v supply voltage to v cc and the +5v supply voltage to the pullup resistor. chip information transistor count: 98 max9120 in- 2m ? 2m ? r pullup 3v (5v) logic out out v cc +5v (+3v) +3v (+5v) v ee 5v (3v) logic in in+ logic-level translator typical application circuit v ee v cc out r3 r2 r1 r4 v ref v in v cc max9118 max9120 figure 4. max9118/max9120 additional hysteresis max9119 in+ out v cc 100mv p-p v cc v ee in- figure 5. zero-crossing detector
max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference ______________________________________________________________________________________ 13 package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation go to www.maxim-ic.com/packages .) sc70, 5l.eps package outline, 5l sc70 21-0076 1 1 e
max9117?ax9120 sc70, 1.6v, nanopower, beyond-the-rails comparators with/without reference maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 14 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2007 maxim integrated products is a registered trademark of maxim integrated products, inc. soicn .eps package outline, .150" soic 1 1 21-0041 b rev. document control no. approval proprietary information title: top view front view max 0.010 0.069 0.019 0.157 0.010 inches 0.150 0.007 e c dim 0.014 0.004 b a1 min 0.053 a 0.19 3.80 4.00 0.25 millimeters 0.10 0.35 1.35 min 0.49 0.25 max 1.75 0.050 0.016 l 0.40 1.27 0.394 0.386 d d min dim d inches max 9.80 10.00 millimeters min max 16 ac 0.337 0.344 ab 8.75 8.55 14 0.189 0.197 aa 5.00 4.80 8 n ms012 n side view h 0.244 0.228 5.80 6.20 e 0.050 bsc 1.27 bsc c h e e b a1 a d 0 -8 l 1 variations: package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation go to www.maxim-ic.com/packages .) revision history pages changed at rev 4: 1, 2, 9, 13
e nglish ? ???? ? ??? ? ??? what's ne w p roducts solutions de sign ap p note s sup p ort buy comp any me mbe rs max9117 part number table notes: see the max9117 quickview data sheet for further information on this product family or download the max9117 full data sheet (pdf, 344kb). 1. other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales . 2. didn't find what you need? ask our applications engineers. expert assistance in finding parts, usually within one business day. 3. part number suffixes: t or t&r = tape and reel; + = rohs/lead-free; # = rohs/lead-exempt. more: see full data sheet or part naming c onventions . 4. * some packages have variations, listed on the drawing. "pkgc ode/variation" tells which variation the product uses. 5. part number free sample buy direct package: type pins size drawing code/var * temp rohs/lead-free? materials analysis MAX9117EXK+ sc -70;5 pin; dwg: 21-0076e (pdf) use pkgcode/variation: x5+1 * -40c to +85c rohs/lead-free: yes materials analysis MAX9117EXK sc -70;5 pin; dwg: 21-0076e (pdf) use pkgcode/variation: x5-1 * -40c to +85c rohs/lead-free: no materials analysis MAX9117EXK-t sc -70;5 pin; dwg: 21-0076e (pdf) use pkgcode/variation: x5-1 * -40c to +85c rohs/lead-free: no materials analysis MAX9117EXK+t sc -70;5 pin; dwg: 21-0076e (pdf) use pkgcode/variation: x5+1 * -40c to +85c rohs/lead-free: yes materials analysis max9117esa+ soic ;8 pin;.150" dwg: 21-0041b (pdf) use pkgcode/variation: s8+2 * -40c to +85c rohs/lead-free: yes materials analysis max9117esa+t soic ;8 pin;.150" dwg: 21-0041b (pdf) use pkgcode/variation: s8+2 * -40c to +85c rohs/lead-free: yes materials analysis max9117esa soic ;8 pin;.150" dwg: 21-0041b (pdf) use pkgcode/variation: s8-2 * -40c to +85c rohs/lead-free: no materials analysis didn't find what you need?
max9117esa-t soic ;8 pin;.150" dwg: 21-0041b (pdf) use pkgcode/variation: s8-2 * -40c to +85c rohs/lead-free: no materials analysis didn't find what you need? c ontac t us: send us an email c opyright 2 0 0 7 by m axim i ntegrated p roduc ts , dallas semic onduc tor ? legal n otic es ? p rivac y p olic y

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