Quad Digitally Controlled Variable Resistors Low Noise, Low Power I2C Bus, 256 Taps

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.

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)