LM381N National Semiconductor, LM381N Datasheet

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LM381N

Manufacturer Part Number
LM381N
Description
LM381/LM381A Low Noise Dual Preamplifier
Manufacturer
National Semiconductor
Datasheet

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C 1995 National Semiconductor Corporation
LM381 LM381A Low Noise Dual Preamplifier
General Description
The LM381 LM381A is a dual preamplifier for the amplifica-
tion of low level signals in applications requiring optimum
noise performance Each of the two amplifiers is completely
independent with individual internal power supply decou-
pler-regulator providing 120 dB supply rejection and 60 dB
channel separation Other outstanding features include high
gain (112 dB) large output voltage swing (V
and wide power bandwidth (75 kHz 20 Vp-p) The LM381
LM381A operates from a single supply across the wide
range of 9V to 40V
Either differential input or single ended input configurations
may be selected The amplifier is internally compensated
with the provision for additional external compensation for
narrow band applications For additional information see
AN-64 AN-104
Schematic Diagram
TL H 7841
CC
b
2V) p-p
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Low noise
High gain
Single supply operation
Wide supply range 9V– 40V
Power supply rejection
Large output voltage swing (V
Wide bandwidth 15 MHz unity gain
Power bandwidth 75 kHz 20 Vp-p
Internally compensated
Short circuit protected
112 dB open loop
0 5 V total input noise
120 dB
CC
b
2V)p-p
RRD-B30M115 Printed in U S A
TL H 7841 – 1
July 1987

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LM381N Summary of contents

Page 1

... Either differential input or single ended input configurations may be selected The amplifier is internally compensated with the provision for additional external compensation for narrow band applications For additional information see AN-64 AN-104 Schematic Diagram C 1995 National Semiconductor Corporation TL H 7841 Features Low noise total input noise Y ...

Page 2

... A CC Conditions Min 100 Hz e 100 24V kHz e 10–10 000 Hz (Single Ended 1000 Dual-In-Line Package Top View Order Number LM381N or LM381AN See NS Package Number N14A 150 260 C Typ Max Units 160 000 V V 320 000 100 k 200 k ...

Page 3

Typical Applications Typical Tape Playback Amplifier Two-Pole Fast Turn-On NAB Tape Preamp (A Typical Magnetic Phono Preamp TL H 7841 – 7841 – 5 Ultra-Low Distortion Amplifier 10 THD 0 05 ...

Page 4

Typical Performance Characteristics Large Signal Frequency Response % Distortion Gain and Phase Response P-P Output Voltage Channel Separation PSRR vs Frequency Noise Voltage vs Frequency Noise Current vs Frequency Pulse Response 4 Swing ...

Page 5

5 ...

Page 6

... Physical Dimensions inches (millimeters) Order Number LM381N or LM381AN LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein 1 Life support devices or systems are devices or ...

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