LM139/LM239/LM339/LM2901/LM3302

Low Power Low Offset Voltage Quad Comparators

General Description

The LM139 series consists of four independent precision

voltage comparators with an offset voltage specification as

low as 2 mV max for all four comparators. These were

designed specifically to operate from a single power supply

over a wide range of voltages. Operation from split power

supplies is also possible and the low power supply current

drain is independent of the magnitude of the power supply

voltage. These comparators also have a unique characteris-

tic in that the input common-mode voltage range includes

ground, even though operated from a single power supply

voltage.

Application areas include limit comparators, simple analog to

digital converters; pulse, squarewave and time delay gen-

erators; wide range VCO; MOS clock timers; multivibrators

and high voltage digital logic gates. The LM139 series was

designed to directly interface with TTL and CMOS. When

operated from both plus and minus power supplies, they will

directly interface with MOS logic — where the low power

drain of the LM339 is a distinct advantage over standard

comparators.

Features

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Wide supply voltage range

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LM139/139A Series

2 to 36 V

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LM2901:

2 to 36 V

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LM3302:

2 to 28 V

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Very low supply current drain (0.8 mA) — independent

of supply voltage

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Low input biasing current:

25 nA

n

Low input offset current:

n

Offset voltage:

n

Input common-mode voltage range includes GND

n

Differential input voltage range equal to the power

supply voltage

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Low output saturation voltage:

250 mV at 4 mA

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Output voltage compatible with TTL, DTL, ECL, MOS

and CMOS logic systems

Advantages

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High precision comparators

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Reduced V

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Eliminates need for dual supplies

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Allows sensing near GND

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Compatible with all forms of logic

n

Power drain suitable for battery operation

One-Shot Multivibrator with Input

Lock Out

00570612

March 2004

© 2004 National Semiconductor Corporation

DS005706

www.national.com