LP339 Ultra-Low Power Quad Comparator
September 1999
LP339
Ultra-Low Power Quad Comparator
General Description
The LP339 consists of four independent voltage compara-
tors designed specifically to operate from a single power
supply and draw typically 60 µA of power supply drain cur-
rent over a wide range of power supply voltages. Operation
from split supplies is also possible and the ultra-low power
supply drain current is independent of the power supply volt-
age. These comparators also feature a common-mode
range which includes ground, even when operated from a
single supply.
Applications
include
limit
comparators,
simple
analog-to-digital converters, pulse, square and time delay
generators; VCO’s; multivibrators; high voltage logic gates.
The LP339 was specifically designed to interface with the
CMOS logic family. The ultra-low supply current makes the
LP339 valuable in battery powered applications.
n
n
n
n
Single supply operation
Sensing at ground
Compatible with CMOS logic family
Pin-out identical to LM339
Features
n
Ultra-low power supply current drain
(60 µA) — independent of the supply voltage
(75 µW/comparator at +5 V
DC
)
n
Low input biasing current: 3 nA
n
Low input offset current:
±
0.5 nA
n
Low input offset voltage:
±
2 mV
n
Input common-mode voltage includes ground
n
Output voltage compatible with MOS and CMOS logic
n
High output sink current capability (30 mA at V
O
= 2 V
DC
)
n
Supply Input protected against reverse voltages
Advantages
n
Ultra-low power supply drain suitable for battery
applications
Schematic and Connection Diagrams
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Order Number LP339M for S.O. Package
See NS Package Number M14A
Order Number LP339N for Dual-In-Line Package
See NS Package Number N14A
Typical Applications
(V
+
= 5.0 V
DC
)
Driving CMOS
Basic Comparator
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© 1999 National Semiconductor Corporation
DS005226
www.national.com