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general description the max9038Cmax9043 and max9050Cmax9053 feature combinations of low-power comparators and precision voltage references. their operating voltage range makes them ideal for both 3v and 5v systems. the max9039/ max9040/max9041/max9050/max9051 have a single comparator and reference consuming only 40a of supply current. the max9042/max9043/max9052/max9053 have dual comparators and one reference, and consume only 55a of supply current. low-voltage operation and low supply current make these devices ideal for battery- operated systems. the comparators feature rail-to-rail inputs and outputs, with a common-mode input voltage range that extends 250mv beyond the supply rails. input bias current is typically 1.0pa, and input offset voltage is typically 0.5mv. internal hysteresis ensures clean output switching, even with slow-moving input signals. the output stage features a unique design that limits supply current surges while switching, virtually eliminating supply glitches typical of many other comparators. this design also minimizes overall power consumption under dynamic conditions. the comparator outputs have railto-rail, push-pull output stages except the max9038 has an open-drain output that sinks and sources up to 8ma. the propagation delay is 400ns, even with the low-operating supply current. the reference output voltage is set to 1.23v in the max9038/ max9039, to 2.048v in the max9040Cmax9043, and to 2.500v in the max9050Cmax9053. the max9040C max9043 and the max9050Cmax9053 are offered in two grades: an a grade with 0.4% initial accuracy and 6ppm/c tempco, and a b grade with 1% initial accuracy (except max9038/max9039 have an initial accuracy of 0.4%) and 100ppm/c tempco. the voltage references feature a proprietary curvature-correction circuit and laser-trimmed thin-film resistors. these series-mode references can sink or source up to 500a of load current. applications precision battery management window comparators ir receivers level translators digital line receivers features comparator + precision reference in ucsp/sot23 2.5v to 5.5v single-supply operation (max9038Cmax9043) low supply current (max9038/max9039/max9040/ max9041/max9050/max9051) ? 40a quiescent ? 50a with 100khz switching ? open-drain output max9038 400ns propagation delay rail-to-rail inputs rail-to-rail output stage sinks and sources 8ma internal 3mv hysteresis voltage reference offers ? 0.4% (max) initial accuracy (a grade) ? 6ppm/c (typ) temperature coefficient (a grade) ? stable for 0 to 4.7nf capacitive loads typical operating circuit and functional diagrams appear at end of data sheet. ordering information continued at end of data sheet. selector guide appears at end of data sheet. ucsp is a trademark of maxim integrated products, inc. pin configurations continued at end of data sheet. 19-1569; rev 9; 11/15 + denotes lead(pb)-free/rohs-compliant package. part temp range pin- package top mark max9038 babt+t -40c to +125c 6 ucsp adw max9039 bebt+t -40c to +85c 6 ucsp aaz max9039bebt+t10 -40c to +85c 6 ucsp aaz max9040 aeuk+t -40c to +85c 5 sot23 adnw max9040beuk+t -40c to +85c 5 sot23 adnx max9041 aeut+t -40c to +85c 6 sot23 aahf max9041beut+t -40c to +85c 6 sot23 aahh max9041aesa -40c to +85c 8 so max9041besa -40c to +85c 8 so top view (bumps on bottom) top view v ee ref in+ 1 + 5 v cc out max9040max9050 sot23 2 3 4 in- v cc ref v ee in+ max9038max9039 b3 out b1 a3 a2 a1 b2 ucsp max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics pin conigurations ordering information downloaded from: http:///
supply voltage (v cc to v ee ) .................................. -0.3v to +6v out (max9038) ...................................................... -0.3v to +6v all other pins ................................ (v ee - 0.3v) to (v cc + 0.3v) current into input pins ..................................................... 20ma output short-circuit duration (out_, ref) ............. indefinite short circuit to either supply continuous power dissipation (t a = +70c) 5-pin sot23 (derate 7.10mw/c above +70c) ........ 571mw 6-bump ucsp (derate 3.9mw/c above +70c) ........ 308mw 6-pin sot23 (derate 8.70mw/c above +70c) ........ 696mw 8-pin so (derate 5.88mw/c above +70c) ............... 471mw 8-pin max ? (derate 4.1mw/c above +70c) .......... 330mw 10-pin max (derate 5.6mw/c above +70c) .......... 444mw operating temperature range ........................... -40c to +85c junction temperature ...................................................... +150c storage temperature range ............................ -65c to +150c lead temperature (soldering, 10s) ................................. +300c bump reflow temperature (note 1) ................................ +235c (v cc = +5v, v ee = 0v, v cm = 0v, i out = 0a, i ref = 0a, t a = t min to t max , unless otherwise noted. typical values are at t a = +25c.) (note 2) max is a registered trademark of maxim integrated products, inc. parameter symbol conditions min typ max units supply voltage range (note 3) v cc max9040Cmax9043 2.5 5.5 v max9050Cmax9053 2.7 5.5 supply current i cc max9040/max9041/max9050/max9051 v cc = 2.7v 47 67 a v cc = 5v 52 72 max9042/max9043/max9052/max9053 v cc = 2.7v 55 80 v cc = 5v 60 85 comparators input offset voltage (note 4) v os over entire common-mode range t a = +25c 0.5 5.0 mv t a = -40c to +85c 7.0 input hysteresis v hyst 3.0 mv input bias current(notes 5, 6, 7) i b speciied common-mode range 0.001 10.0 na input offset current (note 5) i os speciied common-mode range 0.5 pa common-mode voltage range (notes 5, 8) cmvr t a = +25c v ee - 0.25 v cc + 0.25 v t a = -40c to +85c v ee v cc common-mode rejection ratio (note 5) cmrr speciied common-mode range 52 80 db power-supply rejection ratio psrr max9040Cmax9043, 2.5v v cc 5.5v 55 80 db max9050-max9053, 2.5v v cc 5.5v 55 80 input capacitance (note 5) c in 2.5 pf output short-circuit current i sc v out = v ee or v cc v cc = 5v 95 ma v cc = 2.7v 35 output voltage low v ol v cc = 5v, i sink = 8ma 0.2 0.55 v v cc = 2.7v, i sink = 3.5ma 0.15 0.4 max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics www.maximintegrated.com maxim integrated 2 note 1: this device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during board-level solder attach and rework. this limit permits only the use of the solder profiles recommended in the industry-standard specification, jedec 020a, paragraph 7.6, table 3 for ir/vpr and convection packaging reflow. preheating is required. hand or wave soldering is not allowed. absolute maximum ratings stresses beyond those listed under absolute maximum ratings may cause permanent damage to the devi ce. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. electrical characteristicsa grade (0.4% initial accuracy) downloaded from: http:///
(v cc = 5v, v ee = 0v, v cm = 0v, v pu = 1.8v, r pu = 10k, i out = 0a, i ref = 0a, t a = t min to t max , unless otherwise noted. typical values are at t a = +25c.) (note 2) (v cc = +5v, v ee = 0v, v cm = 0v, i out = 0a, i ref = 0a, t a = t min to t max , unless otherwise noted. typical values are at t a = +25c.) (note 2) parameter symbol conditions min typ max units output voltage high v oh v cc = 5v, i source = 8ma 4.45 4.85 v v cc = 2.7v, i source = 3.5ma 2.3 2.55 output rise/fall times t r /t f c l = 15pf 40 ns c l = 50pf 50 c l = 200pf 80 output propagation delay(note 9) t pd+ / t pd- c l = 15pf, v cc = 2.7v 50mv overdrive 450 ns 100mv overdrive 400 power-up time t pu time to v out valid logic state 20 s voltage reference output voltage v ref t a = +25c max9040Cmax9043 2.040 2.048 2.056 v max9050Cmax9053 2.490 2.500 2.510 output voltage temperature coeficient (note 10) tcv ref max/so 6 30 ppm/c sot23 6 50 line regulation v ref / v cc 2.5v v cc 5.5v, max9040Cmax9043 +50 +200 v/v 2.7v v cc 5.5v, max9050Cmax9053 +50 +200 load regulation v ref / i ref sourcing. 0a i ref 500a 2 4 v/a sinking, -500a i ref 0a 3.5 6 output short-circuit current i sc v ref = v ee or v cc 4 ma thermal hysteresis (note 11) t hyst 130 ppm long-term stability 1000h at t a = +25c 50 ppm noise voltage e out f = 0.1hz to 10hz 40 v p-p f = 10hz to 10khz 105 v rms ripple rejection v ref / v cc v cc = 5v 100mv, f = 120hz 84 db turn-on settling time t r (v ref ) to v ref = 1% of inal value 200 s capacitive-load stability range (note 7) c l (v ref ) 0 4.7 nf parameter symbol conditions min typ max units supply voltage range (note 3) v cc max9038Cmax9043 2.5 5.5 v max9050Cmax5053 2.7 5.5 supply current i cc max9038/max9039/max9040/max9041/ max9050/max9051 v cc = 2.7v 40 a v cc = 5.0v 45 100 max9042/max9043/max9052/max5053 v cc = 2.7v 55 v cc = 5.0v 60 130 max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics www.maximintegrated.com maxim integrated 3 electrical characteristicsb grade (1% initial accuracy) (note 12) electrical characteristics a grade (0.4% initial accuracy) (continued) downloaded from: http:///
(v cc = 5v, v ee = 0v, v cm = 0v, v pu = 1.8v, r pu = 10k, i out = 0a, i ref = 0a, t a = t min to t max , unless otherwise noted. typical values are at t a = +25c.) (note 2) parameter symbol conditions min typ max units comparator input offset voltage (note 4) v os over entire common-mode range 1 9.0 mv input hysteresis v hyst 3.0 mv input bias current (notes 5, 6, 7) i b speciied common-mode range 0.001 25.0 na input offset current (note 5) i os speciied common-mode range 0.5 pa common-mode voltage range (notes 5, 8) cmvr v ee v cc v common-mode rejection ratio (note 5) cmrr speciied common-mode range 52 80 db power-supply rejection ratio psrr max9038Cmax9043, 2.5v v cc 5.5v 55 80 db max9050Cmax9053, 2.7v v cc 5.5v 55 80 input capacitance (note 5) c in 2.5 pf output short-circuit current i sc v out = v ee or v cc v cc = 5v 95 ma v cc = 2.7v 35 output voltage low v ol v cc = 5v, i sink = 8ma 0.2 0.55 v v cc = 2.7v, i sink = 3.5ma 0.15 output voltage high (except max9038) v oh v cc = 5v, i source = 8ma 4.45 4.85 v v cc = 2.7v, i source = 3.5ma 2.55 output leakage max9038 0.5 a output rise/fall times t r /t f c l = 15pf 40 ns c l = 50pf 50 c l = 200pf 80 output rise time t r r pu = 10k?, c l = 15pf, max9038 400 ns r pu = 10k?, c l = 50pf, max9038 1180 r pu = 10k?, c l = 200pf, max9038 5580 output propagation delay(note 9) t pd+ /t pd- c l = 15pf, v cc = 2.7v 50mv overdrive 450 ns 100mv overdrive 400 output rising propagation delay (note 9) t pd+ r pu = 10k?, cl = 15pf, max9038 500 ns r pu = 10k?, cl = 50pf, max9038 1540 r pu = 10k?, cl = 200pf, max9038 3350 power-up time t pu time to v out valid logic state 20 s voltage reference output voltage v ref t a = +25c max9038/max9039 (note 12) 1.225 1.230 1.235 v max9040Cmax9043 2.028 2.048 2.068 max9050Cmax9053 2.475 2.500 2.525 output voltage temperature coeficient (note 10) tcv ref 20 100 ppm/c max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics www.maximintegrated.com maxim integrated 4 electrical characteristicsb grade (1% initial accuracy) (note 12) (continued) downloaded from: http:///
(v cc = 5v, v ee = 0v, v cm = 0v, v pu = 1.8v, r pu = 10k, i out = 0a, i ref = 0a, t a = t min to t max , unless otherwise noted. typical values are at t a = +25c.) (note 2) note 2: all devices are 100% production tested at t a = +25c. limits over the extended temperature range are guaranteed by design. note 3: supply voltage range guaranteed by psrr test on comparator and line regulation of ref. note 4: v os is defined as the center of the input-referred hysteresis band. note 5: for the comparators with the inverting input (in-) uncommitted. note 6: input bias current is the average of the inverting and noninverting input bias currents. note 7: not production tested. guaranteed by design. note 8: guaranteed by cmrr test. note 9: v overdrive is beyond the offset and hysteresis determined trip point. note 10: temperature coefficient is measured by the box method; i.e., the maximum v ref is divided by the maximum t. note 11: thermal hysteresis is defined as the change in v ref at +25c before and after cycling the device from t min to t max . note 12: max9038/max9039 has an initial accuracy of 0.4%. (v cc = 5v, v ee = 0v, v cm = 0v, v pu = 1.8v, r pu = 10k, i out = 0a, i ref = 0a, t a = +25c, unless otherwise noted.) parameter symbol conditions min typ max units line regulation v ref / v cc 2.5v v cc 5.5v max9038Cmax9043 +50 +200 v/v max9050Cmax9053 +50 +200 load regulation v ref / i ref sourcing: 0a i ref 500a 2 4 v/a sinking: -500a i ref 0a 3.5 6 output short-circuit current i sc v ref = v ee or v cc 4 ma thermal hysteresis (note 11) t hyst 130 ppm long-term stability 1000h at t a = +25c 100 ppm ripple rejection v ref / v cc v cc = 5v 100mv, f = 120hz 84 db turn-on settling time t r (v ref ) to v ref = 1% of inal value 200 s capacitive load stability range (note 7) c l (v ref ) 0 4.7 nf 0 10 3020 5040 60 -40 0 -20 20 40 60 80 max9042/max9043/max9052/max9053 supply current vs. temperature max9038 toc02 temperature (c) supply current (a) v cc = 5.0v v in+ > v in- v cc = 2.7v 0.01 0.1 1 10 100 1000 200150 100 50 0 max9039/max9040/max9041/max9050/max9051 supply current vs. switching frequency max9038 toc03 switching frequency (khz) supply current (a) v cc = 5.0v v cc = 2.7v 0 10 3020 5040 60 -40 0 -20 20 40 60 80 max9039/max9040/max9041/max9050/max9051 supply current vs. temperature max9038 toc01 temperature (c) supply current (a) v cc = 5.0v v in+ > v in- v cc = 2.7v max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics www.maximintegrated.com maxim integrated 5 electrical characteristicsb grade (1% initial accuracy) (note 12) (continued) typical operating characteristics downloaded from: http:///
(v cc = 5v, v ee = 0v, v cm = 0v, v pu = 1.8v, r pu = 10k, i out = 0a, i ref = 0a, t a = +25c, unless otherwise noted.) max9038 supply current vs. switching frequency max9038 toc03a frequency (hz) supply current (a) 10k 100 10 20 30 40 50 60 70 80 0 1 1m v cc = 2.7v v cc = 5v 250 0.01 0.1 1 10 100 1000 200150 100 50 0 max9042/max9043/max9052/max9053 supply current vs. switching frequency max9038 toc04 switching frequency (khz) supply current (a) v cc = 5.0v v cc = 2.7v 10,000 1000 100 10 1 0.1 0.01 1 10 0.1 output low voltage vs. output sink current max9038 toc05 output sink current (ma) v ol (mv) v cc = 5.0v v in+ < v in- v cc = 2.7v max9038 output low voltage vs. output sink current max9038 toc05a output sink current (ma) supply current (a) 15 5 10 50 100 150 200 250 300 0 0 20 10,000 1000 100 10 1 0.1 0.01 1 10 0.1 output high voltage vs. output source current max9038 toc06 output source current (ma) output high voltage (v cc - v oh ) (mv) v cc = 5.0v v in+ > v in- v cc = 2.7v 0 4020 60 100 80 120 -40 0 -20 20 40 60 80 output short-circuit current vs. temperature max9038 toc07 temperature (c) output source current (ma) v cc = 5.0v v in+ > v in- out shorted to v ee v cc = 2.7v 0 20 6040 80 100 -40 -20 0 20 40 60 80 output short-circuit current vs. temperature max9038 toc08 temperature (c) output sink current (ma) v cc = 5.0v v in- > v in+ out shorted to v cc v cc = 2.7v max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics maxim integrated 6 www.maximintegrated.com typical operating characteristics (continued) downloaded from: http:///
(v cc = 5v, v ee = 0v, v cm = 0v, v pu = 1.8v, r pu = 10k, i out = 0a, i ref = 0a, t a = +25c, unless otherwise noted.) max9038 output short-circuit current vs. temperature max9038 toc08a temperature (c) short-circuit temperature (ma) 100 50 40 20 60 80 140 120 100 160 0 0 150 v cc = 2.7v v cc = 5v 350 400 450 500 550 600 0 400 200 600 800 100 500 300 700 900 1000 propagation delay vs. capacitive load (v cc = 2.7v) max9038 toc09 capacitive load (pf) t pd (ns) t pd+ to v out = 10% of final value v od = 50mv t pd- to v out = 50% of final value t pd- to v out = 10% of final value t pd+ to v out = 50% of final value 300 400350 500450 600550 650 0 400 200 600 800 100 500 300 700 900 1000 propagation delay vs. capacitive load (v cc = 5v) max9038 toc10 capacitive load (pf) t pd (ns) t pd+ to v out = 50% of final value t pd- to v out = 50% of final value t pd+ to v out = 10% of final value t pd- to v out = 10% of final value v od = 50mv 350300 450400 600550 500 650 -40 0 -20 20 40 60 80 propagation delay vs. temperature max9038 toc10a temperature (c) t pd (ns) t pd+ to v out = 50% of final value t pd- to v out = 50% of final value t pd+ to v out = 10% of final value t pd- to v out = 10% of final value v od = 50mv 200 400300 600500 800700 900 0 80 40 120 160 20 100 60 140 180 200 propagation delay vs. input overdrive max9038 toc10b input overdrive (mv) t pd (ns) t pd+ , v cc = 5.0v t pd- , v cc = 2.7v t pd- , v cc = 5.0v t pd+ , v cc = 2.7v b a 100ns/div propagation delay (t pd+ ) max9038 toc11 a = in+, 50mv/divb = out, 2v/div b a 100ns/div propagation delay (t pd- ) max9038 toc12 a = in+, 50mv/divb = out, 2v/div max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics maxim integrated 7 www.maximintegrated.com typical operating characteristics (continued) downloaded from: http:///
(v cc = 5v, v ee = 0v, v cm = 0v, v pu = 1.8v, r pu = 10k, i out = 0a, i ref = 0a, t a = +25c, unless otherwise noted.) b c a 100ns/div switching current (out rising edge) max9038 toc13 a = in+, 100mv/divb = out, 5v/div c = i cc , 1ma/div b c a 100ns/div switching current (out falling edge) max9038 toc14 a = in+, 100mv/divb = out, 5v/div c = i cc , 1ma/div b a 5ms/div power-up delay (out) max9038 toc15 a = v cc , 2v/div b = out, 1v/div b c a 100s/div power-up delay (ref) max9038 toc16 a = v cc , 2v/div b = ref, 1v/divc = ref, 50mv/div, 2.048v offset 0 0.001 0.002 0.003 0 2.0 1.5 0.5 1.0 2.5 3.0 3.5 4.0 4.5 5.0 input bias current vs. input voltage max9038 tco17 v in+ (v) input bias current (na) v in- = 2.0v i b+ i b- -1.00 -0.50-0.75 0 -0.25 0.750.50 0.25 1.00 -40 0 -20 20 40 60 80 max904_/max905_ reference output voltage temperature drift max9038 toc18 temperature (c) output voltage change (mv) three typical partsnormalized to +25c max9039 reference output voltage temperature drift max9038 toc19 temperature (c) output voltage change (mv) 80 60 40 20 0 -20 -2 -1 0 1 -3 -40 three typical parts normalized to +25c max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics maxim integrated 8 www.maximintegrated.com typical operating characteristics (continued) downloaded from: http:///
(v cc = 5v, v ee = 0v, v cm = 0v, v pu = 1.8v, r pu = 10k, i out = 0a, i ref = 0a, t a = +25c, unless otherwise noted.) pin name function max9038max9039 max9040max9050 max9041max9051 max9042max9052 max9043max9053 ucsp sot23 sot23 so so/max max a2 1 1 6 out comparator output a1 2 2 4 4 5 v ee negative supply voltage b1 3 3 3 in+ comparator noninverting input b3 4 5 1 2 2 ref reference voltage output a3 5 6 7 8 10 v cc positive supply voltage b2 4 2 in- comparator inverting input 5, 8 9 n.c. no connection. not internally connected. 1 1 outa comparator a output 3 4 ina+ comparator a noninverting input 5 6 inb+ comparator b noninverting input 6 7 inb- comparator b inverting input 7 8 outb comparator b output 3 ina- comparator a inverting input -200 -100-150 0 -50 100 50 150 2.5 3.5 4.0 3.0 4.5 5.0 5.5 line regulation max9038 toc20 input voltage (v) reference output voltage change (mv) t a = +25c t a = +85c t a = -40c -1500 -500 -1000 500 0 15001000 2000 -500 -100 -300 100 300 500 load regulation max9038 toc21 load current (ma) reference output voltage change (mv) t a = +25c t a = +85c t a = -40c max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics www.maximintegrated.com maxim integrated 9 typical operating characteristics (continued) pin description downloaded from: http:///
detailed description the max9038Cmax9043 and max9050Cmax9053 feature single/dual, low-power, low-voltage compara - tors and a precision voltage reference. they operate from a single 2.5v to 5.5v (max903_/max904_) or 2.7v to 5.5v (max905_) supply. the single compa rators with reference, (max9038/max9039/max9040/ max9041/max9050/max9051 consume only 40a of supply current, while the dual comparators with reference (max9042/max9043/max9052/max9053) consume only 55a of supply current. their common-mode input range extends 0.25v beyond each rail. internal hysteresis ensures clean output switching, even with slow-moving input signals. the output stage employs a unique design that minimizes supply current surges while switching, virtually eliminating the supply glitches typical of many other comparators. large internal output drivers allow rail-to-rail output swing that can sink and source up to 8ma of current. the precision reference uses a proprietary curvaturecorrec - tion circuit and laser-trimmed thin-film resistors, resulting in a temperature coefficient of less than 30ppm/c over the extended temperature range and initial accuracy of 0.4% (a grade). the reference output voltage is set to 1.23v in the max9038/max9039, 2.048v in the max9040Cmax9043, and to 2.500v in the max9050Cmax9053. comparator input stage circuitry the devices input common-mode range extends from (v ee - 0.25v) to (v cc + 0.25v). these comparators may operate at any differential input voltage within these limits. input bias current is typically 1.0pa if the input voltage is between the supply rails. comparator inputs are protected from overvoltage by internal body diodes connected to the supply rails. as the input voltage exceeds the supply rails, these body diodes become forward biased and begin to conduct. consequently, bias currents increase exponen - tially as the input voltage exceeds the supply rails. comparator output stage circuitry the comparators in these devices contain a unique out - put stage capable of rail-to-rail operation with loads up to 8ma. 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. the typical operating characteristics graph supply current vs. switching frequency shows the minimal supply current increase as the output switch - ing frequency approaches 1mhz. this characteristic reduces the need for power-supply filter capacitors to reduce glitches created by comparator switching cur - rents. another advantage realized in high-speed, battery- powered applications is a substantial increase in battery life. the max9038 is an opendrain output comparator that can be used in logic-level translation or many other applications where voltage level translation is important. applications information additional hysteresis these comparators have 3mv internal hysteresis. additional hysteresis can be generated with two resistors using positive feedback (figure 1). use the following pro - cedure to calculate resistor values: 1) calculate the trip points of the comparator using these formulas: ( ) cc ref th ref v v r2 vv r1 r2 ?? ? = + ???? + ?? tl ref r2 vv 1 r1 r2 ?? = ? ?? + ?? v th is the threshold voltage at which the comparator switches its output from high to low as v in rises above the trip point. v tl is the threshold voltage at which the comparator switches its output from low to high as v in drops below the trip point. 2) the hysteresis band will be: 3) in this example, let v cc = 5v and v ref = 2.5v: hys th tl cc r2 v vvv r1 r2 ?? =?= ?? + ?? figure 1. additional hysteresis max9038Cmax9043max9050Cmax9053 out in+ in- r2 r1 v in v ref v cc v ee v cc max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics www.maximintegrated.com maxim integrated 10 downloaded from: http:///
th r2 v 2.5 2.5 r1 r2 ?? = + ?? + ?? and tl r2 v 2.5 1 r1 r2 ?? = ? ?? + ?? 4) select r2. in this example, we will choose 1k. 5) select v hys . in this example, we will choose 50mv. 6) solve for r1: hys cc r2 vv r1 r2 ?? = ?? + ?? 1000 0.050 5 r1 1000 ?? = ?? + ?? where r1 100k, v th = 2.525v, and v tl = 2.475v. board layout and bypassing power-supply bypass capacitors are not typically needed, but would be called for in cases where supply imped - ance is high, supply leads are long, or excessive noise is expected on the supply lines. use 100nf bypass capaci - tors under these conditions. minimize signal trace lengths to reduce stray capacitance. reference output/load capacitance the max9038/max9039/max904_/max905_ do not require an output capacitor on ref for frequency stability. they are stable for capacitive loads up to 4.7nf. however, in applications where the load or the supply can experience step changes, an output capacitor will reduce the amount of overshoot (or undershoot) and assist the circuits tran - sient response. when an application is not subject to tran - sient conditions, the ref capacitor can be omitted. biasing for data recovery digital data is often embedded into a bandwidth- and amplitude-limited analog path. recovering the data can be difficult. figure 2 compares the input signal to a time- averaged version of itself. this self-biases the threshold to the average input voltage for optimal noise margin. even severe phase distortion is eliminated from the digital output signal. be sure to choose r1 and c1 so that: car 1 f 2 r1c1 >> where f car is the fundamental carrier frequency of the digital data stream. figure 2. time averaging of the input signal for data recovery max9038Cmax9043max9050Cmax9053 out in+ in- 10k ? 0.1f v cc v in v ee v cc max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics www.maximintegrated.com maxim integrated 11 downloaded from: http:///
part comparators per package v ref (v) in- connections max9038 1 1.230 uncommitted max9039 1 1.230 uncommitted max9040 1 2.048 ref max9041 1 2.048 uncommitted max9050 1 2.500 ref max9051 1 2.500 uncommitted max9042 2 2.048 ref/uncommitted max9043 2 2.048 uncommitted/uncommitted max9052 2 2.500 ref/uncommitted max9053 2 2.500 uncommitted/uncommitted max9040max9050 out 1 5 3 6 (a2) 7 (a3) 3 (b1) in+ ref v ee 2 v cc ref max9038max9039 max9041 max9051 out in+ ( ) max9038/max9039 ucsp bumps. in- ref v ee 4 (a1) 8 7 6 5 10 8 76 1 (b3)2 (b2) v cc ref max9042max9052 outa 12 3 4 12 3 4 5 outb ina+ inb- inb+ ref v ee v cc ref max9043max9053 outa outb ina+ ina- inb- inb+ ref v ee v cc ref 4 max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics www.maximintegrated.com maxim integrated 12 functional diagramsselector guide downloaded from: http:///
+ denotes lead(pb)-free/rohs-compliant package. part temp range pin- package top mark max9042 aeua -40c to +85c 8 max max9042beua -40c to +85c 8 max max9042aesa -40c to +85c 8 so max9042besa -40c to +85c 8 so max9043 aeub -40c to +85c 10 max max9043beub -40c to +85c 10 max max9050 aeuk+t -40c to +85c 5 sot23 adnw max9050beuk+t -40c to +85c 5 sot23 adny max9051 aeut+t -40c to +85c 6 sot23 aahg max9051beut+t -40c to +85c 6 sot23 aahi max9051aesa -40c to +85c 8 so max9051besa -40c to +85c 8 so max9052 aeua -40c to +85c 8 max aahg max9052beua -40c to +85c 8 max aahi max9052aesa -40c to +85c 8 so max9052besa -40c to +85c 8 so max9053 aeub -40c to +85c 10 max max9053beub -40c to +85c 10 max v ee in- in+ 1 + 6 v cc 5 ref out max9041max9051 sot23 2 3 4 out n.c. v ee 12 8 7 n.c. v cc in- in+ ref so 3 4 6 5 max9041max9051 inb- inb+ v ee 12 8 7 v cc outb ref ina+ outa max/so 3 4 6 5 max9042max9052 1 23 4 5 10 98 7 6 v cc n.c.outb inb- ina+ ina- ref outa max9043max9053 max inb+ v ee top view max9038/max9039max9041/max9043 max9051/max9053 1.23v/2.048v/ 2.500v out in+ *max9038 only in- ref v in v cc 0.1f r pu * v pu * v ee v cc max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics www.maximintegrated.com maxim integrated 13 pin conigurations (continued) typical operating circuit ordering information (continued) chip information process: cmos downloaded from: http:///
package type package code outline no. land pattern no. 6 ucsp b6-3 21-0097 5 sot23 21-0057 90-0174 6 sot23 21-0058 90-0175 8 so 21-0041 90-0096 8 fmax 21-0036 90-0092 10 fmax 21-0061 90-0330 max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics www.maximintegrated.com maxim integrated 14 package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different su ffix character, but the drawing pertains to the package regardless of rohs status. downloaded from: http:///
revision number revision date description pages changed 0 10/99 initial release 1 1/00 corrections to initial release 2 4/00 adding new part 3 4/00 increase in max supply current speciications 4 10/02 adding ucsp package for max9039 5 10/07 adding input current ratings in absolute maximum ratings , style changes 6 3/09 update chip information , package information , correct max9053 part number, style changes 1, 2, 10, 12C19 7 3/13 updated the general description , electrical characteristics , and the package information 1, 3-5, 13 8 9/13 added the max9038 and lead-free information to the data sheet. 1C15 9 11/15 added max9039bebt+t10 to ordering information section 1 maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and speciications without n otice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. max9038Cmax9043/max9050Cmax9053 micropower, single-supply, ucsp/sot23 comparator + precision reference ics ? 2015 maxim integrated products, inc. 15 revision history for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com. downloaded from: http:///

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