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LM387

National Semiconductor
Part Number LM387
Manufacturer National Semiconductor
Description LM387/LM387A Low Noise Dual Preamplifier
Published Mar 22, 2005
Detailed Description LM387 LM387A Low Noise Dual Preamplifier March 1987 LM387 LM387A Low Noise Dual Preamplifier General Description The L...
Datasheet PDF File LM387 PDF File

LM387
LM387

Overview
LM387 LM387A Low Noise Dual Preamplifier March 1987 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 performance Each of the two amplifiers is completely independent with an internal power supply decoupler-regulator providing 110 dB supply rejection and 60 dB channel separation Other outstanding features include high gain (104 dB) large output voltage swing (VCC b 2V)p-p and wide power 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 dualin-line package The LM387 LM387A is biased like the LM381 See AN-64 and AN-104 Features Y Y Y Y Y Y Y Y Y Y Y Low noise 1 0 mV total input noise High gain 104 dB open loop Single supply operation Wide supply range LM387 9 to 30V LM387A 9 to 40V Power supply rejection 110 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 Performance similar to LM381 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 FIGURE 1 Flat Gain Circuit (AV e 1000) TL H 7845 – 4 FIGURE 2 NAB Tape Circuit C1995 National Semiconductor Corporation TL H 7845 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 LM387 LM387A a 30V a 40V Power Dissipation (Note 1) Operating Temperature...


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