Datasheet

LM1971
SNAS104B –FEBRUARY 1995–REVISED APRIL 2013 www.ti.com
DC INPUTS
Although the μPot was designed to be used as an attenuator for signals within the audio spectrum, it is also
capable of tracking and attenuating an input DC voltage. The device will track voltages to either supply rail.
One point to remember about DC tracking is that with a buffer at the output of the μPot, the resolution of DC
tracking will depend upon the gain configuration of that output buffer and its supply voltage. Also, the output
buffer's supply voltage does not have to be the same as the μPot's supply voltage. Giving the buffer some gain
can provide more resolution when tracking small DC voltages.
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