LM381 - Low Noise Dual Preamplifier [Discontinued]

Datasheet Obsolete Parts Application Notes Knowledge Base

Features
•Low noise - 0.5 µV total input noise
•High gain - 112 dB open loop
•Single supply operation
•Wide supply range 9V-40V
•Power supply rejection - 120 dB
•Large output voltage swing (VCC - 2V)p-p
•Wide bandwidth 15 MHz unity gain
•Power bandwidth 75 kHz, 20 Vp-p
•Internally compensated
•Short circuit protected

 

General Description

The LM381/LM381A is a dual preamplifier for the amplification of low level signals in applications requiring optimum noise performance. More...


Typical Application

See Datasheet for Application Information

Additional Resources
Application Notes (see below)



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM381/LM381A Low Noise Dual Preamplifier 130 Kbytes 7-Jan-96 View Online
Download

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Obsolete Parts

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM381AN
NONE
NATIONAL SEMICONDUCTOR
12/07/93
LM381N
NONE
NATIONAL SEMICONDUCTOR
12/07/93

General Description

The LM381/LM381A is a dual preamplifier for the amplification of low level signals in applications requiring optimum noise performance. Each of the two amplifiers is completely independent, with individual internal power supply decoupler-regulator, providing 120 dB supply rejection and 60 dB channel separation. Other outstanding features include high gain (112 dB), large output voltage swing (VCC - 2V) p-p, 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.

Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-104: Application Note 104 Noise Specs Confusing? 282 Kbytes 14-Oct-02 Download

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[Information as of 21-Nov-2008]