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? Low noise 1.0 mV total input noise
Y? High gain 104 dB open loop
Y? Single supply operation
Y? Wide supply range LM387 9 to 30V
LM387A 9 to 40V
Y? Power supply rejection 110 dB
Y? Large output voltage swing (VCC b 2V)p-p
Y? Wide bandwidth 15 MHz unity gain
Y? Power bandwidth 75 kHz, 20 Vp-p
Internally compensated
Y? ?Short circuit protected
Y? ?Performance similar TO lm381