The ISL90842 integrates four digitally controlled

potentiometers (DCP) configured as variable resistors on a

monolithic CMOS integrated circuit.

The digitally controlled potentiometers are implemented with

a combination of resistor elements and CMOS switches. The

position of the wipers are controlled by the user through the

I2C bus interface. Each potentiometer has an associated

Wiper Register (WR) that can be directly written to and read

by the user. The contents of the WR controls the position of

the wiper.

The DCPs can be used as two-terminal variable resistors in

a wide variety of applications including control, parameter

adjustments, and signal processing.

Features

• Four variable resistors in one package

• 256 resistor taps - 0.4 resolution

• I2C serial interface

• Wiper resistance: 70Ω typical @ 3.3V

• Standby current <5µA max

• Power supply: 2.7V to 5.5V

• 50kΩ, 10kΩ total resistance

• 14 Lead TSSOP

• Pb-free plus anneal available (RoHS compliant)