LM387 National Semiconductor, LM387 Datasheet
LM387
Manufacturer Part Number
LM387
Description
LM387/LM387A Low Noise Dual Preamplifier
Manufacturer
National Semiconductor
Datasheet
1.LM387.pdf
(4 pages)
Available stocks
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Part Number
Manufacturer
Quantity
Price
Part Number:
LM3875T
Manufacturer:
NS/国半
Quantity:
20 000
Company:
Part Number:
LM3875TF/NOPB
Manufacturer:
ABB
Quantity:
12
Part Number:
LM3876TF
Manufacturer:
NS/国半
Quantity:
20 000
C 1995 National Semiconductor Corporation
LM387 LM387A Low Noise Dual Preamplifier
General Description
The LM387 is a dual preamplifier for the amplification of low
level signals in applications requiring optimum noise per-
formance Each of the two amplifiers is completely indepen-
dent with an internal power supply decoupler-regulator pro-
viding 110 dB supply rejection and 60 dB channel separa-
tion Other outstanding features include high gain (104 dB)
large output voltage swing (V
bandwidth (75 kHz 20 Vp-p) The LM387A is a selected
version of the LM387 that has lower noise in a NAB tape
circuit and can operate on a larger supply voltage The
LM387 operates from a single supply across the wide range
of 9V to 30V the LM387A operates on a supply of 9V to
40V
The amplifiers are internally compensated for gains greater
than 10 The LN387 LM387A is available in an 8-lead dual-
in-line package The LM387 LM387A is biased like the
LM381 See AN-64 and AN-104
Schematic and Connection Diagrams
Typical Applications
FIGURE 1 Flat Gain Circuit (A
CC
TL H 7845
b
2V)p-p and wide power
V
e
1000)
TL H 7845– 3
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Low noise
High gain
Single supply operation
Wide supply range LM387
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
Performance similar to LM381
TL H 7845 – 1
FIGURE 2 NAB Tape Circuit
Order Number LM387N or LM387AN
LM387A
See NS Package Number N08E
Dual-In-Line Package
CC
Top View
1 0 V total input noise
b
2V)p-p
RRD-B30M115 Printed in U S A
104 dB open loop
March 1987
TL H 7845 – 2
TL H 7845 – 4
9 to 30V
9 to 40V
110 dB
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