LM1971

SNAS104B – FEBRUARY 1995 – REVISED APRIL 2013

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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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