Dual Digitally Controlled Potentiometer (xdcp) With Operational Amplifier Corporation

The 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