LM139/LM239/LM339/LM2901/LM3302 Low Power Low Offset Voltage Quad Comparators
August 2000
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
characteristic 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
generators; 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
LM139/139A Series
2 to 36 V
DC
or
±
1 to
±
18 V
DC
LM2901:
2 to 36 V
DC
or
±
1 to
±
18 V
DC
LM3302:
2 to 28 V
DC
or
±
1 to
±
14 V
DC
Very low supply current drain (0.8 mA) — independent
of supply voltage
Low input biasing current:
25 nA
±
5 nA
Low input offset current:
±
3 mV
Offset voltage:
Input common-mode voltage range includes GND
Differential input voltage range equal to the power
supply voltage
Low output saturation voltage:
250 mV at 4 mA
Output voltage compatible with TTL, DTL, ECL, MOS
and CMOS logic systems
Advantages
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High precision comparators
Reduced V
OS
drift over temperature
Eliminates need for dual supplies
Allows sensing near GND
Compatible with all forms of logic
Power drain suitable for battery operation
One-Shot Multivibrator with Input Lock Out
DS005706-12
© 2001 National Semiconductor Corporation
DS005706
www.national.com
NSC [ NATIONAL SEMICONDUCTOR ]
