rev 2.0 ?2010 advanced linear devices, inc. 415 tasman drive, sunnyvale, ca 94089-1706 tel: (408) 747-1155 fax: (408) 747-1286 www.aldinc.com a dvanced l inear d evices, i nc. general description the ald2331a/ald2331b/ald2331 is a monolithic high performance dual precision voltage comparator built with advanced silicon gate epad ? cmos technology intended for high precision analog applications. the ald2331a/a ld23 31b/ald2331 offers ultra-low input offset voltages and currents at its input pre-amplifier, precision voltage comparator and high-current output driver integrated on-chip, in one industry standard pinout 8 lead pdip or soic package. primary features include: very high typical input impedance of 10 12 ? ; low input bias current of 10pa; fast response time of 750ns with only 10mv input step signal; very low power dissipation of 55 a per comparator; and single (+5v) or dual ( 5v) power supply operation; and 50ma open drain output drivers. the input voltage range includes ground, making this comparator ideal for low level signal detection with high source impedance. the outputs are open-drain configurations, allowing maximum application flexibility, such as wired-or connection and various different output loads. an external pull- up resistor is required for each output, although the value of the pull-up resistor can vary over a wide range in order to suit the application needs. the outputs can be connected to a higher external voltage than v +. the ald2331a/ald2331b/ald2331 is ideal for a great variety of precison analog voltage comparator applications, especially low level signal detec- tion circuits requiring low standby power, yet retaining high output current capability as needed. ald2331a/ald2331b/ald2331 dual precision cmos voltage comparator with open drain output driver pin configuration block diagram (1) out 1 (7) out 2 (4) gnd v + noninverting input +in 1 (3) inverting input -in 2 (6) noninverting input +in 2 (5) inverting input -in 1 (2) (8) v + applications ? simple precision reference voltage setting ? high source impedance voltage comparison circuits ? mosfet driver ? dual limit window comparator ? power supply voltage monitor ? photo-detector sensor circuit ? relay or led driver ? oscillators ? battery operated instruments ? remote signal detection benefits ? simple precision reference voltage setting ? on-chip input pre-amplifier and output buffers ? precision voltage comparison without pre-amplifier ? eliminates need for second power supply ? wide range of pull-up resistor values features ? fanout of 30ls ttl loads ? guaranteed to drive 200 ? loads ? low supply current of 55 a typical ? pinout of lm193 industry standard voltage comparators ? extremely low input bias currents -- typically 10pa ? virtually eliminates source impedance effects ? low operating supply voltage of 3v to 10v ? single (+5v) and dual supply ( 5v) operation ? high speed for both large and small level signals -- 300ns typical for ttl inputs ? cmos, nmos and ttl compatible ? wired-or open drain outputs ? high output sink current -- typically 50ma ? low supply current spike 1 2 3 4 8 7 6 5 o ut 1 -in 1 +in 1 gnd v + out 2 -in 2 +in 2 sal, pal packages operating temperature range * 0 c to +70 c 0 c to +70 c 8-pin small 8-pinplastic outline package (soic) dip package ALD2331ASAL ald2331apal ald2331bsal ald2331bpal ald2331sal ald2331pal ordering information (?l? suffix for lead free version) * contact factory for leaded (non-rohs) or high temperature versions.
ald2331a/ald2331b/ald2331 advanced linear devices 2 of 8 absolute maximum ratings supply voltage, v + +10.6v differential input voltage range -0.3v to v + +0.3v power dissipation 600 mw operating temperature range sal, pal packages 0 c to +70 c storage temperature range -65 c to +150 c lead temperature, 10 seconds +260 c operating electrical characteristics t a = 25 c v + = +5v unless otherwise specified supply v s 1.5 5 1.5 5 1.5 5 v dual supply voltage v + 3 10 3 10 3 10 v single supply supply i s 110 180 110 180 110 180 a no load current two comparators voltage gain a vd 50 150 50 150 50 150 v/mv r load 15k input offset voltage v os 0.2 0.5 0.5 1.0 1.0 2.0 mv r load 1.5k ? input offset current 1 i os 0.01 20 0.01 20 0.01 20 pa input bias current 1 i b 0.01 20 0.01 20 0.01 20 pa common mode input v icr -0.3 v +-1.5 -0.3 v +-1.5 -0.3 v +-1.5 v voltage range 2 low level sink v ol 0.15 0.4 0.15 0.4 0.15 0.4 v i sink = 12ma output voltage v input = 1v differential low level sink i ol 24 50 24 50 24 50 ma v ol = 1.0 v output current sink output on high level sink output i l 0.01 20 0.01 20 0.01 20 na v out = 5.0 v leakage current sink output off response time 2 t rp 1.1 1.1 1.1 s r l = 5.1k ? , c l = 15pf 5mv input step/ 5mv overdrive t rp 2.4 2.4 2.4 s r l = 5.1k ? ,c l =15pf 1mvinput step/ 1mv overdrive t rp 600 600 600 ns r l = 5.1k ? , c l = 15pf 100mv input step/ 5mv overdrive t rp 300 300 300 ns r l = 5.1k ? ,c l =15pf ttl level input step common mode cmrr 80 80 80 db v input = 0v to 2.5v rejection ratio power supply psrr 75 75 75 db v + = 4v to 5v rejection ratio 2331a 2331b 2331 parameter symbol min typ max min typ max min typ max unit test conditions notes: 1 consists of junction leakage currents 2 sample test parameter
ald2331a/ald2331b/ald2331 advanced linear devices 3 of 8 supply current vs. supply voltage 012 200 supply voltage (v) supply current ( a) 0 10 8 6 24 20 40 60 80 100 120 140 160 180 no load two comparators t a = 25 0 c t a = 125 0 c t a = -55 0 c -55 -25 0 25 50 75 100 125 0 1 10 100 1000 v + = +5v input bias current vs. temperature ambient temperature ( 0 c) input bias current (pa) low level output voltage vs. temperature 0.5 0.4 0.3 0.2 0.1 0.0 low level output voltage (v) ambient temperature ( c) -55 -25 0 25 50 125 100 75 v + = +3.5v v + = +5v v + = +10v i sink = 12ma v input = 1v differential supply current vs.temperature supply current ( a) ambient temperature ( c) -55 -25 0 25 50 125 100 75 160 140 120 100 60 80 180 200 v + = +5v no load two comparators typical performance characteristics common - mode voltage referred to supply voltage temperature ( c) 0.5 v+ -0.5 -1.0 0.5 v- -0.5 common - mode voltage limits (v) -55 -25 0 25 50 125 100 75 v s = 2.5 v transfer function differential input voltage (mv) +5.0 -5.0 0.0 output voltage (v) +2.5 0.0 -2.5 t a = 25 c
ald2331a/ald2331b/ald2331 advanced linear devices 4 of 8 common mode rejection ratio vs. temperature common mode rejection mode (db) -55 -25 0 25 50 125 100 75 85.0 80.0 75.0 70.0 90.0 65.0 60.0 ambient temperature ( c) v + = +5v r l = 5.1k ? power supply rejection ratio vs.temperature ambient temperature ( 0 c) -55 -25 0 25 50 100 125 75 90.0 85.0 70.0 power supply rejection ratio (db) 80.0 75.0 65.0 60.0 v + = +5v r l = 5.1k ? input offset voltage vs. temperature 0.4 0.0 -0.4 0.8 -0.8 -1.2 1.2 -2.0 input offset voltage (mv) -55 -25 0 25 50 125 100 75 ambient temperature ( c) -1.6 2.0 1.6 r l = 5.1k ? v + = +5v v + = +2.5v 0.0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 -1.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 response time for various input overdrives output voltage (v) time ( s) 50mv 20mv 10mv 5mv 2mv 1mv v + = +5v r l = 5.1k ? input step c l = 15pf t a = 25 0 c saturation voltage vs. sink current output sink current (ma) 0 15 30 45 60 75 output saturation voltage (v) 3.0 2.0 1.0 0.0 2.5 1.5 0.5 v + = +5v t a = 125 0 c t a = -55 0 c t a = 85 0 c t a = 25 0 c t a = -25 0 c output off-state voltage vs. output leakage current 34567891011 0.0 0.1 1.0 10.0 100.0 v oh = v + output leakage current (na) output off-state voltage (v) t a = 125 0 c t a = 85 0 c t a = 25 0 c typical performance characteristics (cont'd)
ald2331a/ald2331b/ald2331 advanced linear devices 5 of 8 + - +5v v a = 0v to +10v +10v 0 v out v in + v in - v out voltage comparator with single supply and output level shift voltage comparator with +/-5v supply and +5v relay drive precision single supply voltage comparator with direct relay driver 6 8 10 12 4 2 supply voltage (v) output low voltage vs. supply voltage output low voltage (v) t a = 25 c i ol = 12ma 0.0 0.2 0.4 0.5 0.6 0.1 0.3 typical applications +5 5v relay + - +5 v in v r + - 5v relay -5 +5 v in + 1k v in - - - + + q q v in v ref v + voltage comparator with complementary outputs response time for various input overdrives output voltage (v) -1.0 6.0 2.0 0.0 1.0 3.0 4.0 5.0 0.0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3.0 time ( s) t a = 25 0 c v + = +5v 1mv 2mv 5mv 10mv 20mv 50mv r l = 5.1k ? c l = 15pf input step typical performance characteristics (cont'd)
ald2331a/ald2331b/ald2331 advanced linear devices 6 of 8 voltage comparator with output level shift and high current load driver voltage comparator with +/-5v supply and output level shift + - 15k -5v +5v v out 15k 100k 100k 0.1 f 0.1 f +5v 0 v out +5v + - -5v +5v r 2 =50 200 ? +5v r 1 = 15k r load v out v in + v in - 0.066v -4v v out response time measurement circuit response time is defined as the internal between the application of an input step function and the instant when the output reaches 50% of its maximum value as measured by the following test circuit: + - 5.1k ? out +5v 10x input step 1k ? 9k ? v in dual limit window comparator + + - - output high for v in < v ref(high) minimum r load = 1.5k ? > and v out v in v + v ref(high) v ref(low) v ref(low) r load n dual limit photo detector monitor v+ v limit2 photo- detector light - - + + led buzzer v limit 1 v external led turns on as photo-detector voltage reaches v limit 1. both led and horn turns on as photo-detector voltage reaches v limit 2. v external = +10v, v+ = +5v typical applications (cont'd)
ald2331a/ald2331b/ald2331 advanced linear devices 7 of 8 8 pin plastic soic package millimeters inches min max min max dim a a 1 b c d-8 e e h l s 1.75 0.25 0.45 0.25 5.00 4.05 6.30 0.937 8 0.50 0.053 0.004 0.014 0.007 0.185 0.140 0.224 0.024 0 0.010 0.069 0.010 0.018 0.010 0.196 0.160 0.248 0.037 8 0.020 1.27 bsc 0.050 bsc 1.35 0.10 0.35 0.18 4.69 3.50 5.70 0.60 0 0.25 ? soic-8 package drawing l c h s (45 ) ? e a a 1 b d s (45 ) e
ald2331a/ald2331b/ald2331 advanced linear devices 8 of 8 8 pin plastic dip package millimeters inches min max min max dim a a 1 a 2 b b 1 c d-8 e e 1 e e 1 l s-8 ? 3.81 0.38 1.27 0.89 0.38 0.20 9.40 5.59 7.62 2.29 7.37 2.79 1.02 0 5.08 1.27 2.03 1.65 0.51 0.30 11.68 7.11 8.26 2.79 7.87 3.81 2.03 15 0.105 0.015 0.050 0.035 0.015 0.008 0.370 0.220 0.300 0.090 0.290 0.110 0.040 0 0.200 0.050 0.080 0.065 0.020 0.012 0.460 0.280 0.325 0.110 0.310 0.150 0.080 15 pdip-8 package drawing b 1 s b e e 1 d e a 2 a 1 a l c e 1 ?
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