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 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.

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Datasheet

Title		Size	Date	Other Language
	LM381/LM381A Low Noise Dual Preamplifier	130 Kbytes	7-Jan-96

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	AN-104: Application Note 104 Noise Specs Confusing?	208 Kbytes	14-Oct-02

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