general description the lmx331/lmx393/lmx339 single/dual/quad com-parators are drop-in, pin-for-pin-compatible replace- ments for the lmv331/lmv393/lmv339. the lmx331h/ lmx393h/lmx339h offer the performance of the lmx331/lmx393/lmx339 with the added benefit of inter- nal hysteresis to provide noise immunity, preventing out- put oscillations even with slow-moving input signals. advantages of the lmx331/lmx393/lmx339 series include low supply voltage, small package, and low cost. the lmx331 is available in both 5-pin sc70 and sot23 packages, lmx393 is available in both 8-pin ?ax and smaller sot23 packages, and the lmx339 is available in14-pin tssop and so packages. they are manufac- tured using advanced submicron cmos technology. designed with the most modern techniques, the lmx331/lmx393/lmx339 achieve superior performance over bicmos or bipolar versions on the market. the lmx331/lmx393/lmx339 offer performance advantages such as wider supply voltage range, wider operating temperature range, better cmrr and psrr, improved response time characteristics, reduced off- set, reduced output saturation voltage, reduced input bias current, and improved rf immunity. applications mobile communicationsnotebooks and pdas automotive applications battery-powered electronics general-purpose portable devices general-purpose low-voltage applications features ? guaranteed 1.8v to 5.5v performance ? -40? to +125? automotive temperature range ? low supply current (60?/comparator at v dd = 5.0v) ? input common-mode voltage range includesground ? no phase reversal for overdriven inputs ? low output saturation voltage (100mv) ? internal 2mv hysteresis(lmx331h/lmx393h/lmx339h) ? 5-pin sc70 space-saving package (2.0mm ? 2.1mm ? 1.0mm) (lmx331/lmx331h) lmx331/lmx393/lmx339 general-purpose, low-voltage, single/dual/quad, tiny-pack comparators ________________________________________________________________ maxim integrated products 1 top view 1413 12 11 10 9 8 12 3 4 5 6 7 outcoutd v ss ind+ ina- v dd outa outb ind-inc+ inc- inb+ inb- ina+ tssop/so v ss out in- 15 v dd in+ sc70/sot23 234 lmx331/lmx331h 12 34 8 7 6 5 v dd outb inb-inb+ v ss ina+ ina- outa sot23/ max lmx393/lmx393h lmx339/lmx339h adbc a b + + + pin configurations 19-1958; rev 4; 5/11 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. ordering information part temp range pin- package top mark lmx331 axk+t -40 c to +125 c 5 sc70 acd lmx331auk+t -40 c to +125 c 5 sot23 adqr lmx331h axk+t -40 c to +125 c 5 sc70 ace lmx331hauk+t -40 c to +125 c 5 sot23 adqs lmx393 aka+t -40 c to +125 c 8 sot23 aaif lmx393aua+t -40 c to +125 c 8 ?ax lmx393h aka+t -40 c to +125 c 8 sot23 aaig lmx393haua+t -40 c to +125 c 8 ?ax lmx339 aud+t -40 c to +125 c 14 tssop lmx339asd+t -40 c to +125 c 14 so lmx339h aud+t -40 c to +125 c 14 tssop lmx339hasd+t -40 c to +125 c 14 so + denotes a lead(pb)-free/rohs-compliant package. t = tape and reel. ?ax is a registered trademark of maxim integrated products, inc. downloaded from: http:///
lmx331/lmx393/lmx339 general-purpose, low-voltage, single/dual/quad, tiny-pack comparators 2 _______________________________________________________________________________________ absolute maximum ratings dc electrical characteristics?.7v operation(v dd = 2.7v, v ss = 0v, v cm = 0v, r l = 5.1k connected to v dd . typical values are at t a = +25 c. boldface limits apply at the defined temperature extremes.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. 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. supply voltage (v dd to v ss )...................................-0.3v to +6v all other pins .................................. (v ss - 0.3v) to (v dd + 0.3v) continuous power dissipation (t a = +70?) 5-pin sc70 (derate 3.1mw/? above +70?) ..............247mw 5-pin sot23 (derate 7.1mw/? above +70?)............571mw 8-pin sot23 (derate 8.9mw/? above +70?)............714mw 8-pin ?ax (derate 10.3mw/? above +70?) ...........825mw 14-pin tssop (derate 9.1mw/? above +70?) .........727mw 14-pin so (derate 8.3mw/? above +70?).............666.7mw operating temperature range .........................-40? to +125? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? soldering temperature (reflow) .......................................+260? parameter symbol conditions min typ max units input offset voltage v os 0.2 7 mv input voltage hysteresis v hyst lmx331h/lmx393h/lmx339h only 2 mv input offset voltage averagetemperature drift tcv os 5 ?/? t a = +25? ?.05 ?50 t a = -40? to +85? ?00 input bias current i b t a = -40? to +125? ?00 na t a = +25? ?.05 ?0 t a = -40? to +85? ?50 input offset current i os t a = -40? to +125? ?50 na -0.1 input voltage range v cm 2.0 v voltage gain a v lmx331/lmx393/lmx339 only 50 v/mv output saturation voltage v sat i sink 1ma 50 mv output sink current i o v o 1.5v 5 37 ma lmx331/lmx331h 50 100 lmx393/lmx393h (both comparators) 70 140 supply current (note 2) i s lmx339/lmx339h (all four comparators) 140 200 ? t a = +25? 0.003 t a = -40? to +85? 1 output leakage current t a = -40? to +125? 2 ? ac electrical characteristics?.7v operation(v dd = 2.7v, v ss = 0v, v cm = 0v, r l = 5.1k connected to v dd . typical values are at t a = +25 c. boldface limits apply at the defined temperature extremes.) (note 1) parameter symbol conditions min typ max units input overdrive = 10mv (note 3) 500 propagation delayoutput high to low t phl input overdrive = 100mv (note 3) 100 ns input overdrive = 10mv (note 3) 500 propagation delayoutput low to high t plh input overdrive = 100mv (note 3) 100 ns downloaded from: http:///
lmx331/lmx393/lmx339 general-purpose, low-voltage, single/dual/quad, tiny-pack comparators _______________________________________________________________________________________ 3 dc electrical characteristics?.0v operation(v dd = 5v, v ss = 0v, v cm = 0v, r l = 5.1k connected to v dd . typical values are at t a = +25 c. boldface limits apply at the defined temperature extremes.) (note 1) parameter symbol conditions min typ max units t a = +25? 0.25 7 t a = -40? to +85? 9 input offset voltage v os t a = -40? to +125? 9 mv input voltage hysteresis lmx331h/lmx393h/lmx339h only 2 mv input offset voltage averagetemperature drift tcv os 5 ?/? t a = +25? ?.05 ?50 t a = -40? to +85? ?00 input bias current i b t a = -40? to +125? ?00 na t a = +25? ?.05 ?0 t a = -40? to +85? ?50 input offset current i os t a = -40? to +125? ?50 na -0.1 input voltage range v cm 4.2 v voltage gain a v lmx331/lmx393/lmx339 only 20 50 v/mv t a = +25? 70 400 t a = -40? to +85? 700 output saturation voltage v sat i sink 4ma t a = -40? to +125? 700 mv output sink current i o v o 1.5v 10 73 ma t a = +25? 60 120 t a = -40? to +85? 150 lmx331/lmx331h t a = -40? to +125? 170 t a = +25? 100 200 t a = -40? to +85? 250 lmx393/lmx393h(both comparators) t a = -40? to +125? 300 t a = +25? 170 300 t a = -40? to +85? 350 supply current (note 2) i s lmx339/lmx339h(all four comparators) t a = -40? to +125? 430 ? t a = +25? 0.003 t a = -40? to +85? 1 output leakage current t a = -40? to +125? 2 ? ac electrical characteristics?.0v operation(v dd = 5v, v ss = 0v, v cm = 0v, r l = 5.1k connected to v dd . typical values are at t a = +25 c. boldface limits apply at the defined temperature extremes.) (note 1) parameter symbol conditions min typ max units input overdrive = 10mv (note 3) 400 propagation delayoutput high to low t phl input overdrive = 100mv (note 3) 90 ns input overdrive = 10mv (note 3) 600 propagation delayoutput low to high t plh input overdrive = 100mv (note 3) 200 ns downloaded from: http:///
lmx331/lmx393/lmx339 general-purpose, low-voltage, single/dual/quad, tiny-pack comparators 4 _______________________________________________________________________________________ dc electrical characteristics?.8v operation(v dd = 1.8v, v ss = 0v, v cm = 0v, r l = 5.1k connected to v dd . typical values are at t a = +25 c. boldface limits apply at the defined temperature extremes.) (note 1) parameter symbol conditions min typ max units input offset voltage v os 0.2 5 mv input voltage hysteresis lmx331h/lmx393h/lmx339h only 2 mv input offset voltage averagetemperature drift tcv os 5 ?/ c input bias current i b 0.05 na input offset current i os 0.05 na -0.1 input voltage range v cm 1 v output saturation voltage v sat i sink 1ma 35 mv power-supply rejection ratio psrr v dd = 1.8v to 5.5v 60 70 db output sink current i o v o 1.5v 15 ma lmx331/lmx331h 40 100 lmx393/lmx393h (both comparators) 65 140 supply current (note 2) i s lmx339/lmx339h (all four comparators) 120 200 ? output leakage current 0.003 ? note 1: all devices are production tested at +25?. all temperature limits are guaranteed by design. note 2: supply current when output is high. note 3: input overdrive is the overdrive voltage beyond the offset and hysteresis-determined trip points. ac electrical characteristics?.8v operation(v dd = 1.8v, v ss = 0v, v cm = 0v, r l = 5.1k connected to v dd . typical values are at t a = +25 c. boldface limits apply at the defined temperature extremes.) (note 1) parameter symbol conditions min typ max units input overdrive = 10mv (note 3) 500 propagation delayoutput high to low t phl input overdrive = 100mv (note 3) 100 ns input overdrive = 10mv (note 3) 500 propagation delayoutput low to high t plh input overdrive = 100mv (note 3) 100 ns downloaded from: http:///
lmx331/lmx393/lmx339 general-purpose, low-voltage, single/dual/quad, tiny-pack comparators _______________________________________________________________________________________ 5 0 3020 10 40 50 60 70 80 90 100 13 2 456 lmx331 supply current vs. supply voltage lmx331 toc01 supply voltage (v) supply current ( a) v out = high t a = +125 c t a = +85 c t a = +25 c t a = -40 c 0 4020 100 8060 160140 120 180 13 2 456 lmx331 supply current vs. supply voltage lmx331 toc02 supply voltage (v) supply current ( a) t a = +125 c v out = low t a = +85 c t a = +25 c t a = -40 c -1.0 -0.5 0.5 0 1.0 1.5 -40 0 20 -20 40 60 80 100 120 input o ff s et v o lta g e vs. temperature lmx331 toc03 temperature ( c) input offset voltage (mv) v dd = 2.7v v dd = 5.0v v dd = 1.8v 0 4020 8060 120100 140 output low voltage vs. sink current lmx331 toc04 sink current (ma) output low voltage (mv) 01234 v dd = 2.7v v dd = 5.0v v dd = 1.8v 60 70 80 90 100 110 120 -40 0 -20 20 40 60 80 100 120 output low voltage vs. temperature lmx331 toc05 temperature ( c) output low voltage (mv) i out = 4ma 0 200100 400300 500 600 04 0 6 0 20 80 100 120 propagation delay vs. capacitive load lmx331 toc06 capacitive load (pf) propagation delay (ns) t plh t phl 0 25 7550 125 150100 175 -40 0 20 -20 40 60 80 100 120 propagation delay vs. temperature lmx331 toc07 temperature ( c) propagation delay (ns) t plh t phl 0 150100 50 200 250 300 350 400 450 500 05 0 25 75 100 125 150 propagation delay vs. input overdrive (t plh ) lmx331 toc08 input overdrive (mv) propagation delay (ns) t a = +125 c t a = +85 c t a = +25 c t a = -40 c 0 6040 20 80 100 120 140 160 180 200 05 0 25 75 100 125 150 propagation delay vs. input overdrive (t phl ) lmx331 toc09 input overdrive (mv) propagation delay (ns) t a = +125 c t a = +85 c t a = +25 c t a = -40 c typical operating characteristics (v dd = 5v, v ss = 0v, v cm = 0v, r l = 5.1k , c l = 10pf, overdrive = 100mv, t a = +25?, unless otherwise noted.) downloaded from: http:///
lmx331/lmx393/lmx339 general-purpose, low-voltage, single/dual/quad, tiny-pack comparators 6 _______________________________________________________________________________________ typical operating characteristics (continued) (v dd = 5v, v ss = 0v, v cm = 0v, r l = 5.1k , c l = 10pf, overdrive = 100mv, t a = +25?, unless otherwise noted.) 0 0.5 1.0 1.5 2.0 2.5 3.0 -40 0 -20 20 40 60 80 100 120 lmx331h/lmx393h/lmx339h hysteresis vs. temperature lmx331 toc10 temperature ( c) hysteresis (mv) 0 1 32 4 5 13 24 5 6 lmx331h/lmx393h/lmx339h hysteresis vs. supply voltage lmx331 toc11 supply voltage (v) hysteresis (mv) time (200ns/div) (in-) - in+ 100mv/div out 2v/div lmx331 toc12 propagation delay 100mv overdrive time (200ns/div) (in-) - in+ 10mv/div out 2v/div lmx331 toc13 propagation delay 10mv overdrive time (500ns/div) (in-) - in+ 100mv/div out 2v/div lmx331 toc14 500khz response 100mv overdrive time (500ns/div) (in-) - in+ 10mv/div out 2v/div lmx331 toc15 500khz response 10mv overdrive time (2 s/div) (in-) - in+ 100mv/div out 2v/div lmx331 toc16 100khz response 100mv overdrive time (2 s/div) (in-) - in+ 10mv/div out 2v/div lmx331 toc17 100khz response 10mv overdrive time (1 s/div) v dd 2v/div out 2v/div lmx331 toc18 power-up response downloaded from: http:///
lmx331/lmx393/lmx339 general-purpose, low-voltage, single/dual/quad, tiny-pack comparators _______________________________________________________________________________________ 7 detailed description the lmx331/lmx393/lmx339 are single/dual/quad,low-cost, general-purpose comparators. they have a single-supply operating voltage of 1.8v to 5v. the com- mon-mode input range extends from -0.1v below the negative supply to within 0.7v of the positive supply. they require approximately 60? per comparator with a 5v supply and 40? with a 2.7v supply. the lmx331h/lmx393h/lmx339h have 2mv of hys- teresis for noise immunity. this significantly reduces the chance of output oscillations even with slow-moving input signals. the lmx331/lmx393/lmx339 and lmx331h/lmx393h/lmx339h are ideal for automotive applications because they operate from -40 c to +125 c (see typical operating characteristics ). applications information 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 lmx331h/lmx393h/lmx339h have internal hysteresis to counter parasitic effects and noise. the hysteresis in a comparator creates two trip points: one for the rising input voltage and one for the falling input voltage (figure 1). the difference between the trippoints is the hysteresis. when the comparator's input voltages are equal, the hysteresis effectively causes one comparator input to move quickly past the other, thus taking the input out of the region where oscillation occurs. this provides clean output transitions for noisy, slow-moving input signals. additional hysteresis can be generated with two resis- tors, using positive feedback (figure 2). use the follow- ing procedure to calculate resistor values: out in- thresholds in+ hysteresis band v hyst v tl v th figure 1. threshold hysteresis band (not to scale) pin lmx331 lmx393 lmx339 name function 1 in+ noninverting input 2 4 12 v ss negative supply (connect to gnd) 3 in- inverting input 4 out comparator output (open-drain) 583v dd positive supply 1 2 outa comparator a output (open-drain) 7 1 outb comparator b output (open-drain) 2 4 ina- comparator a inverting input 3 5 ina+ comparator a noninverting input 5 7 inb+ comparator b noninverting input 6 6 inb- comparator b inverting input 8 inc- comparator c inverting input 9 inc+ comparator c noninverting input 10 ind- comparator d inverting input 11 ind+ comparator d noninverting input 13 outd comparator d output (open-drain) 14 outc comparator c output (open-drain) pin description downloaded from: http:///
lmx331/lmx393/lmx339 general-purpose, low-voltage, single/dual/quad, tiny-pack comparators 8 _______________________________________________________________________________________ 1) find output voltage when output is high: v out(high) = v dd - i load ? r l 2) find the trip points of the comparator using these formulas:v th = v ref + ((v out (high) - v ref )r2) / (r1 + r2) v tl = v ref (1 - (r2 / (r1 + r2))) where v th is the threshold voltage at which the com- parator switches its output from high to low as v in rises above the trip point, and v tl is the threshold voltage at which the comparator switches its output from low tohigh as v in drops below the trip point. 3) the hysteresis band will be: v hyst = v th - v tl = v dd (r2 / (r1 + r2)) in this example, let v dd = 5v, v ref = 2.5v, i load = 50na, r l = 5.1k : v out(high) = 5.0v - (50 ? 10 -9 ? 5.1 ? 10 3 ) 5.0v v th = 2.5v + 2.5v(r2 / (r1 + r2)) v tl = 2.5v(1 - (r2 / (r1 + r2))) select r2. in this example, we will choose 1k . select v hyst . in this example, we will choose 50mv. solve for r1: v hyst = v out(high) (r2 / (r1 + r2)) v 0.050v = 5(1000 / (r1 + 1000)) v where r1 100k , v th = 2.525v, and v tl = 2.475v. choose r1 and r2 to be large enough as not to exceedthe amount of current the reference can supply. the source current required is v ref / (r1 + r2). the sink current is (v out(high) - v ref ) ? (r1 + r2). choose r l to be large enough to avoid drawing excess current, yet small enough to supply the necessary cur-rent to drive the load. r l should be between 1k and 10k . board layout and bypassing use 0.1? bypass capacitors from v dd to v ss . to max- imize performance, minimize stray inductance byputting this capacitor close to the v dd pin and reduc- ing trace lengths. for slow-moving input signals (risetime > 1ms), use a 1nf capacitor between in+ and in- to reduce high-frequency noise. chip information lmx331/lmx331h transistor count: 112lmx393/lmx393h transistor count: 211 lmx339/lmx339h transistor count: 411 lmx331 r1 r2 in+ in- v dd v out v ss v ref v in v dd out r l figure 2. adding hysteresis with external resistors package information for the latest package outline information and land patterns, goto www.maxim-ic.com/packages . note that a ?? ?? or ??in the package code indicates rohs status only. package draw-ings may show a different suffix character, but the drawing per- tains to the package regardless of rohs status. package type package code document no. land pattern no. 5 sc70 x5+1 21-0076 90-0188 5 sot23 u5+2 21-0057 90-0174 8 sot23 k8f+4 21-0078 90-0176 8 ?ax u8+1 21-0036 90-0092 14 tssop u16m+1 21-0066 90-0117 14 soic s8+4 21-0041 90-0041 downloaded from: http:///
lmx331/lmx393/lmx339 general-purpose, low-voltage, single/dual/quad, tiny-pack comparators maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 _____________________ 9 2011 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. revision history revision number revision date description pages changed 3 8/10 added lead-free parts 1 4 5/11 added thermal data 2, 3, 4 downloaded from: http:///
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