Dual Digitally Controlled Potentiometer (xdcp) With Operational Amplifier CorporationThe X9438 is a monolithic CMOS IC that incorporates
two Operational Amplifiers and two nonvolatile digitally
controlled potentiometers. The Amplifiers are CMOS
differential input voltage Operational Amplifiers with
near Rail-to-Rail outputs. All pins for the two Amplifiers
are brought out of the package to allow combining
them with the potentiometers, or using them as com-
plete stand-alone Amplifiers
The digitally controlled potentiometers consist of a
series string of 63 polycrystalline resistors that behave
as standard integrated circuit resistors. The two-wire
serial port, common to both pots, allows the user to
program the connection of the wiper output to any of
the resistor nodes in the series string. The wiper posi-
tion is saved in the on board E2 memory to allow for
nonvolatile restoration of the wiper position. By Intersil Corporation
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