LM339 quad voltage comparator quad voltage comparators these comparators are designed for use in level detection, lowClevel sensing and memory applications in consumer automotive and industrial electronic applications. features l single or dual supplies l low input bias current - 25na(typ) l low input offset voltage - +1.0mv(typ) l low input offset current - +5.0na(typ) l input common-mode voltage range to gnd l output compatible with ttl, mos, and cmos l low output saturation voltage - 130mv(typ) @ 4.0ma pin arrangement 14 sop LM339cs 14 dip LM339cd absolute maximum ratings power supply voltage v cc +36 or +18 v input differential voltage range v idr 36 v input common mode voltage range v icr -0.3 to +36 v output short circuit-to-ground i sc continuous ma power dissipation @ 25 o cp d 1.0 w derate above 25 o c 8.0 mw/ o c operating ambient temperature range t a 0 to 70 o c storage temperature range t s -65 to 150 o c item symbol rating unit notes: 1. the max. output current may be as high as 20 ma, independent of the magnitude of v cc , output short circuits to v cc can cause excessive heating and eventual destruction. 2. this magnitude of input current will only occur if the leads are driven more negative than ground or the negative supply voltage. this is due to the input pnp collector base junction becooming forward biased, acting as an input clamp diode. there is also a lateral pnp parasitic transistor action which can cause the output voltage of the comparators to go to the v cc voltage level (or ground if overdrive is large) during the time that an input is driven negative. this will not destroy the device when limited to the max rating and normal output states will recover when inputs become > ground or negative supply. 3. at output switch point, v o = 1.4 vdc, r s = 100 w with v cc from 5.0 vdc to 30 vdc, and over the full input common mode range (0v to v cc = C1.5v). 4. due to the pnp transistor inputs, bias current will flow out of the inputs. this current is essentially constant, independent of the output state, therefore, no loading changes will exist on the input lines. 5. response time is specified with a 100mv step and 5.0mv of overdrive. for larger signals, 300ns is typical. 6. positive excursions of input voltage may exceed the power supply level. as long as one of the inputs remain within the common-mode range, the comparator will provide the proper output state.
LM339 quad voltage comparator electrical characteristics v cc = 5.0vdc, 0 o c < t a < 25 o c (unless otherwise noted) item symbol min typ max unit input offset voltage (3) v io mv t a = 25 o c --- +2.0 +5.0 t a = 0 o c to 70 o c --- --- +9.0 input bias current (3,4) i ib na t a = 25 o c --- 25 250 t a = 0 o c to 70 o c --- --- 400 input offset current (3) i io na t a = 25 o c --- +50 +50 t a = 0 o c to 70 o c --- --- +150 input common mode voltage range (6) v icr v t a = 25 o c 0 --- v cc -1.5 t a = 0 o c to 70 o c 0 --- v cc -2.0 supply current i cc ma r l = , t a = 25 o c --- 0.8 2.0 r l = , v cc = 30vdc --- --- --- voltage gain a vol --- 200 --- v/mv r l > 15k, v cc = 15 vdc large signal response time --- --- 300 --- ns v1 = ttl logic swing. vref = 1.4 vdc vrl = 5.0 vdc, rl = 5.1k response time (6) t tlh --- 13 --- m s vrl = 5.0 vdc, rl = 5.1k output sink current i sink 6.0 16 --- ma v1(-) > 1.0 vdc, v1(+) = 0 vdc vo < 1.5 vdc saturation voltage v sat mv v1(-) > 1.0 vdc, v1(+) = 0 vdc --- 130 400 i sink < 4.0 ma, t a = 25 o c 0 o c < t a < 70 o c --- --- 700 output leakage current i ol na v1(-) = 0 vdc, v1(+) > 1.0 vdc --- 0.1 --- vo = 5.0 vdc, t a = 25 o c v1(-) = 0 vdc, v1(+) > 1.0 vdc --- --- 1000 vo = 30 vdc, 0 o c < t a < 70 o c input differential voltage (6) v id --- --- v cc v all vin > gnd or v-supply 0 o c < t a < 70 o c 8 8
LM339 quad voltage comparator circuit schematic (diagram shown is for 1 comparator) offset voltage (volts) ambient temperature ( o c) input bias current (na) output saturation voltage (mv) supply voltage (vdc) output current (ma) normalized input offset voltage input bias current
LM339 quad voltage comparator these dual comparators feature high gain, wide bandwidth characteristics. this gives the device oscillation tendencies if the outputs are capacitively coupled to the inputs via stray capacitance. this oscillation manifests itself during output transitions (v ol to v oh ). to alleviate this situation, input resistors <10 k w should be used. the addition of positive feedback (< 10 mv) is also recommended. it is good design practice to ground all unused pins. differential input voltages may be larger than supply voltage without damaging the comparator?s inputs. voltages more negative than ?0.3 v should not be used. applications information zero crossing detector (single supply) zero crossing detector (split supply) square wave oscillator driving logic inverting comparator with hysteresis non-inverting comparator with hysteresis
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