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LM381

National Semiconductor
Part Number LM381
Manufacturer National Semiconductor
Description LM381/LM381A Low Noise Dual Preamplifier
Published Mar 22, 2005
Detailed Description LM381 LM381A Low Noise Dual Preamplifier July 1987 LM381 LM381A Low Noise Dual Preamplifier General Description The LM...
Datasheet PDF File LM381 PDF File

LM381
LM381

Overview
LM381 LM381A Low Noise Dual Preamplifier July 1987 LM381 LM381A Low Noise Dual Preamplifier 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 b 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 Features Y Y Y Y Y Y Y Y Y Y Low noise 0 5 mV 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 b 2V)p-p Wide bandwidth 15 MHz unity gain Power bandwidth 75 kHz 20 Vp-p Internally compensated Short circuit protected Schematic Diagram TL H 7841 – 1 C1995 National Semiconductor Corporation TL H 7841 RRD-B30M115 Printed in U S A Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage Power Dissipation (Note 1) a 40V Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering 10 sec ) 0 C to a 70 C b 65 C to a 150 C 260 C 1 56 W VCC e 14V unless otherwise stated Min Typ 160 000 320 000 10 100 200 05 Open Loop Source Sink 150 8 2 VCC b 2 15 20 VPP (VCC e 24V) Linear Operation f e 1 kHz f e 1 kHz 60 dB Gain f e 1 kHz RS e 60X 10–10 000 Hz (Single Ended Input Flat Gain Circuit AV e 1000) 05 05 07 10 mVrms mVrms 120 60 01 ...


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