LM387

更新时间： 2024-09-26 22:51:51

品牌	Logo	应用领域
美国国家半导体 - NSC		放大器
页数	文件大小	规格书
4页	124K
描述
LM387/LM387A Low Noise Dual Preamplifier

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LM387 数据手册

March 1987

LM387/LM387A Low Noise Dual Preamplifier

General Description

Features

Low noise

1.0 mV total input noise

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),

High gain

104 dB open loop

Single supply operation

Wide supply range LM387

LM387A

9 to 30V

9 to 40V

110 dB

Power supply rejection

large output voltage swing (V

2V)p-p, and wide power

Large output voltage swing (V

2V)p-p

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.

Wide bandwidth 15 MHz unity gain

Power bandwidth 75 kHz, 20 Vp-p

Internally compensated

Short circuit protected

Performance similar to LM381

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

Dual-In-Line Package

TL/H/7845–2

Top View

Order Number LM387N or LM387AN

See NS Package Number N08E

TL/H/7845–1

Typical Applications

TL/H/7845–3

TL/H/7845–4

FIGURE 1. Flat Gain Circuit (A

1000)

FIGURE 2. NAB Tape Circuit

1995 National Semiconductor Corporation

TL/H/7845

RRD-B30M115/Printed in U. S. A.

12 3 4

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