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. general description the MAX9075/max9077 single/dual comparators are optimized for 3v and 5v single-supply applications. these comparators have a 580ns propagation delay and consume just 3? per comparator. the combination of low-power, single-supply operation down to 2.1v, and ultra-small footprint makes these devices ideal for all portable applications. the MAX9075/max9077 have a common-mode input voltage range of -0.2v to v cc - 1.2v. unlike many com- parators, there is no differential clamp between the inputs, allowing the differential input voltage range to extend rail-to-rail . all inputs and outputs tolerate a continuous short-circuit fault condition to either rail. the design of the output stage limits supply-current surges while switching (typical of many other compara- tors), minimizing power consumption under dynamic conditions. large internal push-pull output drivers allow rail-to-rail output swing with loads up to 2ma, making these devices ideal for interface with ttl/cmos logic. the MAX9075 single comparator is available in 5-pin sc70 and sot23 packages, while the max9077 dual comparator is available in 8-pin sot23, ?ax, and so packages. applications battery-powered systems threshold detectors/discriminators keyless entry systems ir receivers digital line receivers features 580ns propagation delay from only 3? 2.1v to 5.5v single-supply operation ground-sensing inputs rail-to-rail outputs no output phase inversion for overdriven inputs no differential clamp across inputs available in ultra-small packages 5-pin sc70 (MAX9075) 8-pin sot23 (max9077) MAX9075/max9077 low-cost, ultra-small, 3a single-supply comparators ________________________________________________________________ maxim integrated products 1 19-1547; rev 2; 6/03 ordering information typical operating circuit v cc v cc out gnd v ref in- in+ v in MAX9075 max9077 pin configurations top view gnd in- in+ 15 v cc out MAX9075 sc70-5/sot23-5 2 34 pin configurations continued at end of data sheet. rail-to-rail is a registered trademark of nippon motorola, ltd. part temp range pin- package top mark MAX9075 exk-t -40 c to +85 c 5 sc70-5 aac MAX9075euk-t -40 c to +85 c 5 sot23-5 adlx max9077 eka-t -40 c to +85 c 8 sot23-8 aaad max9077eua -40 c to +85 c 8 max max9077esa -40 c to +85 c 8 so
MAX9075/max9077 low-cost, ultra-small, 3a single-supply comparators 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = 5v, v cm = -0.2v, t a = t min to t max , unless otherwise noted. typical values are at t a = +25 c.) (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. note 1: all devices are 100% production tested at t a = +25 c. all temperature limits are guaranteed by design. note 2: inferred from cmrr. either input can be driven to the absolute maximum limit without output inversion, as long as the other input is within the input voltage range. note 3: guaranteed by design. supply voltage v cc to gnd........................................................................6v all other pins to gnd...........................-0.3v to (v cc + 0.3v) duration of output short-circuit to gnd or v cc ........continuous continuous power dissipation (t a = +70 c) 5-pin sc70 (derate 2.5mw/ c above +70 c) ............200mw 5-pin sot23 (derate 7.1mw/ c above +70 c)..........571mw 8-pin sot23 (derate 5.3mw/ c above +70 c)..........421mw 8-pin max (derate 4.5mw/ c above +70 c) ...........362mw 8-pin so (derate 5.88mw/ c above +70 c)..............471mw operating temperature range ...........................-40 c to +85 c storage temperature range .............................-65 c to +150 c lead temperature (soldering, 10s) .................................+300 c inferred from psrr c load = 10pf -0.2v v cm (v cc - 1.2v) c load = 10pf, overdrive = 100mv c load = 10pf, overdrive = 100mv v cm = 0v (note 3) v cc = 3v 2.1v v cc 5.5v (note 2) i sink = 2ma i source = 2ma conditions ns 1.6 rise/fall time ns 250 t pd- propagation delay high to low ns 580 t pd+ propagation delay low to high v 0.4 v ol out_ output voltage low v v cc - 0.4 v oh out_ output voltage high 6.6 3 5.2 i cc v 2.1 5.5 v cc operating supply voltage range supply current per comparator db 60 82 cmrr common-mode rejection ratio pf 3 c in input capacitance na -5 -20 i b input bias current na 1 i os input offset current 2.4 db 54 77 psrr power-supply rejection ratio v -0.2 v cc - 1.2 v cmr common-mode voltage range mv 1 8 v os input offset voltage units min typ max symbol parameter t a = +25 c t a = t min to t max v cc = 5v a
MAX9075/max9077 low-cost, ultra-small, 3a single-supply comparators _______________________________________________________________________________________ 3 0 1.0 0.5 2.0 1.5 2.5 3.0 010 51520 output voltage low vs. sink current (v cc = 2.1v) MAX9075/7 toc01 sink current (ma) output voltage (v) t a = +85? t a = +25? t a = -40? 0 1.0 0.5 2.0 1.5 2.5 3.5 3.0 4.0 010 5 1520 25303540 output voltage low vs. sink current (v cc = 3v) MAX9075/7 toc02 sink current (ma) output voltage (v) t a = +85 c t a = +25 c t a = -40 c 0 2 1 4 3 5 7 6 020 10 30 40 50 60 70 80 90 output voltage low vs. sink current (v cc = 5v) MAX9075/7 toc03 sink current (ma) output voltage (v) t a = +85 c t a = +25 c t a = -40 c -0.5 0.5 0 1.5 1.0 2.0 2.5 04 26810 12 14 16 18 output voltage high vs. source current (v cc = 2.1v) MAX9075/7 toc04 source current (ma) output voltage (v) t a = +85 c t a = +25 c t a = -40 c -0.5 0.5 0 1.5 1.0 2.0 2.5 3.0 3.5 010 5152025 30 35 40 45 output voltage high vs. source current (v cc = 3v) MAX9075/7 toc05 source current (ma) output voltage (v) t a = +85 c t a = +25 c t a = -40 c -1 1 0 3 2 4 5 6 020 10 30 40 50 60 70 80 90 100 output voltage high vs. source current (v cc = 5v) MAX9075/7 toc06 source current (ma) output voltage (v) t a = +85 c t a = +25 c t a = -40 c 20 10 0 40 30 80 70 60 50 90 -55 -35 -15 5 25 45 65 85 short-circuit sink current vs. temperature MAX9075 toc07 temperature ( c) sink current (ma) v cc = 5v v cc = 3v v cc = 2.1v 20 10 0 40 30 80 70 60 50 90 100 -55 -35 -15 5 25 45 65 85 short-circuit source current vs. temperature MAX9075 toc08 temperature ( c) source current (ma) v cc = 5v v cc = 3v v cc = 2.1v 1.0 0.5 0 2.0 1.5 4.0 3.5 3.0 2.5 4.5 -55 -35 -15 5 25 45 65 85 supply current vs. temperature (out = high) MAX9075 toc09 temperature ( c) supply current ( a) v cc = 5v v cc = 3v v cc = 2.1v typical operating characteristics (v cc = 5v, v cm = 0, 100mv overdrive, t a = +25 c, unless otherwise noted.)
MAX9075/max9077 low-cost, ultra-small, 3a single-supply comparators 4 _______________________________________________________________________________________ 1.0 0.5 0 2.0 1.5 4.0 3.5 3.0 2.5 -55 -35 -15 5 25 45 65 85 supply current vs. temperature (out = low) MAX9075 toc10 temperature ( c) supply current ( a) v cc = 5v v cc = 3v v cc = 2.1v supply current vs. output transition frequency MAX9075 toc11 transition frequency (hz) supply current ( a) 1000 1 10 100 1 1k 10k 100k 10 100 1m v cc = 2.1v v cc = 5v v cc = 3v -0.6 -0.7 -0.8 -0.4 -0.5 0 -0.1 -0.2 -0.3 -55 -35 -15 5 25 45 65 85 input offset voltage vs. temperature MAX9075 toc12 temperature ( c) offset voltage (mv) v cc = 5v v cc = 3v v cc = 2.1v 0 0.2 0.1 0.4 0.3 0.6 0.5 0.7 propagation delay vs. load capacitance MAX9075 toc13 load capacitance (pf) propagation delay ( s) 0 500 1000 1500 2000 t pd+ t pd- 0 0.4 0.2 0.8 0.6 1.2 1.0 1.4 1.6 propagation delay vs. input overdrive (t pd+ ) MAX9075 toc14 input overdrive (mv) propagation delay ( s) 0 50 100 150 200 250 v cc = 5v v cc = 3v v cc = 2.1v 0 0.2 0.1 0.4 0.3 0.6 0.5 0.7 propagation delay vs. input overdrive (t pd- ) MAX9075 toc15 input overdrive (mv) propagation delay ( s) 0 50 100 150 200 250 v cc = 5v v cc = 3v v cc = 2.1v 0 100 50 200 150 300 250 350 400 450 500 propagation delay vs. temperature (v cc = 2.1v) MAX9075 toc16 temperature ( c) propagation delay (ns) -55 -35 -15 5 25 45 65 85 t pd- t pd+ 0 100 200 300 400 500 600 propagation delay vs. temperature (v cc = 3v) MAX9075 toc17 temperature ( c) propagation delay (ns) -55 -35 -15 5 25 45 65 85 t pd- t pd+ 0 100 200 300 400 500 600 700 800 propagation delay vs. temperature (v cc = 5v) MAX9075 toc18 temperature ( c) propagation delay (ns) -55 -35 -15 5 25 45 65 85 t pd- t pd+ typical operating characteristics (continued) (v cc = 5v, v cm = 0, 100mv overdrive, t a = +25 c, unless otherwise noted.)
MAX9075/max9077 low-cost, ultra-small, 3a single-supply comparators _______________________________________________________________________________________ 5 100ns/div propagation delay (t pd+ ) MAX9075/7 toc19 50mv/div 2v/div v in v cc = 5v v out 100ns//div propagation delay (t pd- ) MAX9075/7 toc20 50mv/div 2v/div v out v in v cc = 5v 200 s/div triangle wave MAX9075/7 toc23 v in v out 50mv/div 1v/div v cc = 3v 100ns/div propagation delay (t pd+ ) MAX9075/7 toc21 v in v out 50mv/div 1v/div v cc = 3v 100ns/div propagation delay (t pd- ) MAX9075/7 toc22 v in v out 50mv/div 1v/div v cc = 3v 0 1 2 3 4 5 6 7 input bias current vs. temperature MAX9075 toc24 temperature ( c) input bias current (na) -55 -35 -15 5 25 45 65 85 v cc = 3v v cc = 5v v cc = 2.1v typical operating characteristics (continued) (v cc = 5v, v cm = 0, 100mv overdrive, t a = +25 c, unless otherwise noted.)
MAX9075/max9077 low-cost, ultra-small, 3a single-supply comparators 6 _______________________________________________________________________________________ pin description function name sot23 max9077 ?ax/so sc70 sot23 1 comparator output out 1 1 1 4 2 2 ground gnd 2 output of comparator a outa 3 3 4 noninverting input of comparator a ina+ 4 2 3 inverting input of comparator a ina- inverting comparator input in- 4 noninverting comparator input in+ 3 8 5 8 positive supply voltage v cc 5 5 5 6 6 inverting input of comparator b inb- 7 7 output of comparator b outb noninverting input of comparator b inb+ MAX9075 pin detailed description the MAX9075/max9077 feature a 580ns propagation delay from an ultra-low supply current of only 3a per comparator. these devices are capable of single-sup- ply operation in the 2.1v to 5.5v range. large internal output drivers allow rail-to-rail output swing with up to 2ma loads. both comparators offer a push-pull output that sinks and sources current. comparator output the MAX9075/max9077 are designed to maintain a low-supply current during repeated transitions by limit- ing the shoot-through current. noise considerations, comparator input the input common-mode voltage range for these devices extends from -0.2v to v cc - 1.2v. unlike many other comparators, the MAX9075/max9077 can oper- ate at any differential input voltage within these limits. input bias current is typically -5na if the input voltage is between the supply rails. although the comparators have a very high gain, useful gain is limited by noise. the comparator has a wide- band peak-to-peak noise of approximately 70v. applications information adding hysteresis hysteresis extends the comparator s noise margin by increasing the upper threshold and decreasing the lower threshold. a voltage divider from the output of the comparator sets the trip voltage. therefore, the trip voltage is related to the output voltage. set the hystere- sis with three resistors using positive feedback, as shown in figure 1. the design procedure is as follows: 1) choose r3. the leakage current of in+ may cause a small error; however, the current through r3 can be approximately 500na and still maintain accuracy. the added supply current due to the circuit at the trip point is v cc /r3; 10m ? is a good practical value for r3, as this keeps the current well below the sup- ply current of the chip. 2) choose the hysteresis voltage (v hys ), which is the voltage between the upper and lower thresholds. in this example, choose v hys = 50mv and assume v ref = 1.2v and v cc = 5v. 3) calculate r1 as follows: r1 = r3 v hys / v cc = 10m ? 0.05 / 5 = 100k ?
4) choose the threshold voltage for v in rising (v thr ). in this example, choose v thr = 3v. 5) calculate r2 as follows: r2 = 1 / {[v thr / (v ref ? r1)] - 1/r1 - 1/r3} = 1 / {[3 / (1.2 ? 100k ? )] - 1/100k ? - 1/10m ? } = 67.114k ? a 1% preferred value is 64.9k ? . 6) verify the threshold voltages with these formulas: v in rising: v thr = v ref ? r1 (1/r1 + 1/r2 + 1/r3) v in falling: v thf = v thr - (r1 ? v cc ) / r3 7) check the error due to input bias current (5na). if the error is too large, reduce r3 and recalculate. v th = i b (r1 ? r2 ? r3) / (r1 + r2 + r3) = 0.2mv board layout and bypassing use 10nf power-supply bypass capacitors. use 100nf bypass capacitors when supply impedance is high, when supply leads are long, or when excessive noise is expected on the supply lines. minimize signal trace lengths to reduce stray capacitance. minimize the capacitive coupling between in- and out. for slow- moving input signals (rise time > 1ms) use a 1nf capacitor between in+ and in-. chip information MAX9075 transistor count: 86 max9077 transistor count: 142 MAX9075/max9077 low-cost, ultra-small, 3a single-supply comparators _______________________________________________________________________________________ 7 v cc v in v cc out gnd v ref r3 r2 r1 MAX9075 max9077 figure 1. adding hysteresis inb- inb+ ina+ 1 2 8 7 v cc outb gnd ina- outa sot23-8 top view 3 4 6 5 inb- inb+ gnd 1 2 8 7 v cc outb ina- ina+ outa max/so 3 4 6 5 max9077 max9077 pin configurations (continued)
MAX9075/max9077 low-cost, ultra-small, 3a single-supply 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. 8 _____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2003 maxim integrated products printed usa is a registered trademark of maxim integrated products. sc70, 5l.eps sot23, 8l .eps rev. document control no. approval proprietary information title: 3.002.60 e c e1 e between 0.08mm and 0.15mm from lead tip. 8. meets jedec mo178. 8 0.60 1.75 0.30 l2 0 e1 e l 1.50 e1 0.65 bsc. 1.95 ref. 0.25 bsc. gauge plane seating plane c c l pin 1 i.d. dot (see note 6) l c l c a2 e1 d detail "a" 5. coplanarity 4 mils. max. note: 7. solder thickness measured at flat section of lead 6. pin 1 i.d. dot is 0.3 mm min. located above pin 1. 4. package outline inclusive of solder plating. 3. package outline exclusive of mold flash & metal burr. heel of the lead parallel to seating plane c. 2. foot length measured from lead tip to upper radius of 1. all dimensions are in millimeters. l2 l a1 a 0.45 1.30 0.15 1.45 max 0.28 b 0.90 a2 0.00 a1 0.90 a min symbol 3.00 0.20 2.80 d 0.09 c see detail "a" l c b e d 1 21-0078 1 package outline, sot-23, 8l body 0 0 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 .)
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