LP311 Voltage Comparator
February 1995
LP311 Voltage Comparator
General Description
The LP311 is a low power version of the industry-standard
LM311 It takes advantage of stable high-value ion-implant-
ed resistors to perform the same function as an LM311 with
a 30 1 reduction in power drain but only a 6 1 slowdown of
response time Thus the LP311 is well suited for battery-
powered applications and all other applications where fast
response is not needed It operates over a wide range of
supply voltages from 36V down to a single 3V supply with
less than 200
mA
drain but it is still capable of driving a 25
mA load The LP311 is quite easy to apply without any oscil-
lation if ordinary precautions are taken to minimize stray
coupling from the output to either input or to the balance
pins (as described in the LM311 datasheet Application
Hints)
Features
Y
Y
Y
Y
Y
Y
Y
Y
Low power drain 900
mW
on 5V supply
Operates from
g
15V or a single supply as low as 3V
Output can drive 25 mA
Emitter output can swing below negative supply
Response time 1 2
ms
Same pin-out as LM311
Low input currents 2 nA of offset 15 nA of bias
Large common-mode input range
b
14 6V to 13 6V
with
g
15V supply
Applications
Y
Y
Y
Level-detector for battery-powered instruments
Low-power lamp or relay driver
Low-power zero-crossing detector
Schematic Diagram
TL H 5711 鈥?7
Connection Diagram
Dual-In-Line Package
Order Number LP311M or LP311N
See NS Package Numbers M08A or N08E
TL H 5711 鈥?4
Top View
C
1995 National Semiconductor Corporation
TL H 5711
RRD-B30M115 Printed in U S A
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