operating temperature range * -55 c to +125 c0 c to +70 c0 c to +70 c 14-pin 14-pin 14-pin cerdip small outline plastic dip package package (soic) package ald 4301adb ALD4301ASB ald4301apb ald 4301db ald4301sb ald4301pb quad precision cmos voltage comparator with open drain driver ald4301a/ald4301 a dvanced l inear d evices, i nc. ordering information pin configuration block diagram general description the ald4301a/ald4301 is a monolithic high performance quad voltage comparator built with advanced silicon gate cmos technol- ogy. it features very high typical input impedance of 10 12 w ; low input bias current of 10pa; fast response time of 300ns; very low power dissipation of 55 m a per comparator; high output drive and single +5v or dual 5v power supply operation. the input voltage range includes ground, making this comparator ideal for low level signal detection with high source impedance. the outputs are open-drain configuration, allowing maximum application flexibility. the outputs can be connected to a higher external voltage than v + and used in a wired-or connection with other open drain circuits such as ald2301/ald2303. they can also be used with push-pull output types such as ald2302/ald4302 voltage comparators simultaneously with open drain comparators using a common v+. the ald4301a/ ald4301 is ideal for a great variety of voltage comparator applica- tions, especially detection circuits requiring very low input currents and low standby power, yet retaining high output current capability. features ? fanout of 30 ls ttl loads ? low supply current of 55 m a/comparator typical ? pinout/functional equivalent to lm393 types ? extremely low input bias currents -- 10pa typical ? virtually eliminates source impedance effects ? low operating supply voltage of 3v to 12v ? single +5v and dual supply 5v operation ? high speed for both large signal and low level signals -- 300ns typical for ttl inputs ? cmos, nmos and ttl compatible ? wired-or open drain outputs ? high output sinking current -- 60ma typical ? low supply current spikes ? high gain applications ? high source impedance voltage comparison circuits ? dual/quad limit window comparator ? power supply voltage monitor ? photo-detector sensor circuit ? relay or led driver ? oscillators ? battery operated instruments ? remote signal detection * contact factory for industrial temperature range ? 2005 advanced linear devices, inc. 415 tasman drive, sunnyvale, california 94089 -1706 tel: (408) 747-1155 fax: (408) 747-1286 http://www.aldinc.com db, pb, sb package +in 1 -in 2 +in 2 03 04 gnd -in 4 +in 3 -in 3 02 01 -in 1 +in 4 1 14 v +
2 3 13 12 11 10 9 8 4 5 6 7 v +
(3) inverting input
- in 1 (4)
noninverting input
+ in 1 (5) noninverting input
+ in 2 (7) inverting input
- in 2 (6)
noninverting input
+ in 3 (9)
inverting input
- in 3 (8) inverting input
- in 4 (10)
(12) noninverting input
+ in 4 (11)
- + - + - + - + (2) out 1 (1) out 2 (14) out 3 (13) out 4
ald4301a/ald4301 advanced linear devices absolute maximum ratings supply voltage, v + 13.2v differential input voltage range -0.3v to v + +0.3v power dissipation 600 mw operating temperature range pb, sb package 0 c to +70 c db package -55 c to +125 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 4301a 4301 test parameter symbol min typ max min typ max unit conditions notes: 1 consists of junction leakage currents 2 sample tested parameters voltage v + 3 12 3 12 v single supply supply 1.5 6 1.5 6 v dual supplies supply i s 220 350 220 350 m a no load current voltage a vd 50 150 50 150 v/mv r load 3 15k w gain input offset v os 510mvr load 3 1.5k w voltage input offset i os 0.1 30 0.1 30 pa current 1 input bias i b 0.1 30 0.1 30 pa current 1 common mode input v icr -0.3 v + -1.5 -0.3 v + -1.5 v voltage range 2 low level i sink =12ma output v ol 0.15 0.4 0.15 0.4 v v input =1v voltage differential low level output i ol 24 60 24 60 ma v ol =1.0v current high level leakage i lh 0.1 20 0.1 20 na v oh = 5.0 v current response r l =5.1k w time 2 t rp 650 650 ns c l = 15pf 100mv input step/5mv overdrive rl = 5.1k w 300 300 ns c l = 15pf ttl- level input step
ald4301a/ald4301 advanced linear devices typical performance characteristics saturation voltage vs. sink current output sink current (ma) 0 1530 456075 1.5 1.2 0.9 0.6 0.3 0.0 output saturation voltage (v) v s = 2.5v -55 c 25 c -25 c 85 c 125 c saturation voltage vs.temperature tem perature ( c) -55 -25 0 25 50 125 100 75 1.4 1.2 1.0 0.8 0.6 0.4 0.2 saturation voltage (v) 0 v s = 2.5v i sink = 50ma transfer function differential input voltage (mv) +6.0 -6.0 0.0 output voltage (v) +2.5 0.0 -2.5 t a = 25 c v s = 6v r l = 5.1k 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 = 2.5v tim e ( s) 0.0 0.2 0.4 0.8 0.6 1.2 1.0 1.4 response time for various
input overdrives
+2.5 0 100 0.0 -2.5 input
voltage (mv)
output
voltage (v)
5mv 10mv 20mv 50mv t a = 25 c
v s = 2.5v 0v v in v+ v- v out + - 5.1k 2mv tim e ( s) 0.0 0.2 0.4 0.8 0.6 1.2 1.0 1.4 response time for various
input overdrives
+2.5 100 0 0.0 -2.5 input
voltage (mv)
output
voltage (v)
50mv 20mv 5mv 10mv t a = 25 c
v s = 2.5v 0v v in v+ v- v out + - 2mv 5.1k
ald4301a/ald4301 advanced linear devices typical performance characteristics 120 100 80 60 140 025 50 75 -25 -55 temperature ( c) supply current ( a) 100 160 180 200 125 v s = 2.5v no load all comparators supply current vs. temperature 2.4 2.2 2.0 1.8 2.6 025 50 75 -25 -55 temperature ( c) offset voltage (mv) 100 2.8 3.0 125 v cm = 0v v s = 2.5v input offset voltage vs. temperature typical applications quad limit window comparator led turns on as photo-detector voltage reaches v limit1 . both led and horn turns on as photo-detector voltage reaches v limit2. v external = +12v v+ = +5v. quad limit photo-detector monitor voltage comparator with complementary outputs v+ v limit2 photo-
detector light - - + + led buzzer v limit 1 v external
1/2 ald4301 1/2 ald4301
+ + - - 1/2 ald4301
output high for v in < v ref(high) minimum r load = 1.5k > and
v out
v in
v + v ref(high)
1/2 ald4301 v ref(low)
v ref(low)
r load v in
- - + + q q v in v ref v + 1/2 ald4301 1/2 ald4301
140
120
100 80 160
6.0 8.0 10.0 12.0 4.0 2.0 supply voltage (v) supply current ( a) t a = 25 c
r l =
- +
v + total supply current vs.
total supply voltage
ald4301a/ald4301 advanced linear devices typical applications zero crossing detector double dual limit window comparator + +3v -3v 1/4 ald4301 v out
v in 50k multiple relay drive + +5v +5v 1/4 ald4301 v ref v in voltage level translator + 1/4 ald4301 = 1.4v for ttl input = v +
for cmos input 2 v out v ref v in v ref v ref output v out swings from rail-to-rail 50k v+ = +10v + + +12v +12v + + +12v 50k 47k 50k vh 2 vh 1 vl 1 vl 2 ald4301 ald4301 +12v +12v v in vl 1 and vh 1 first limit window send warning vl 2 and vh 2 second limit window execute system cutoff
ald4301a/ald4301 advanced linear devices typical applications push-pull complementary power mosfet driver + + +12v +12v +12v p- channel vp 02
power mosfet
2a source 2a sink n - channel vn 01
power mosfet
+12v 10k 40k 10k v 1
v 2 v in
1/2 ald4301 r r this circuit eliminates crossover current in the complementary power transistors. the outputs can be used to source and sink different loads or tied together to provide push-pull drive of the same load. r 3 50 k w time delay generator +
r f4
1/4 ald4301 1/4 ald4301 r f3 r f2 v +
r f1 + 1/4 ald4301 + 1/4 ald4301 r t c t + v in
v + v ref relay 1 relay 3 relay 2 relay 1 turns off followed by
relay 2 and then relay 3 with
fixed sequence and time delays
selectrd by ratios r f1 , r f2 , r f3
and r f4. design & operating notes: 1. in order to minimize stray oscillation, all unused inputs must be tied to ground. 2. the input bias and offset currents are essentially input protection diode reverse bias leakage currents, and are typically less than 1 pa at room temperature. these currents are a function of ambient temperature, and would have to be considered in applications where very high source impedance or high accuracy are involved. 3. the high output sinking current of 60ma for each output offers flexibility in many applications, as a separate buffer or driver would not be necessary to drive the intended load. however, as the circuit normally operates close to ambient temperature due to its very low power consumption, thermal effects caused by large output current transients must be considered in certain applications.
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