Single Digitally Controlled Potentiometer (XDCP™) Low Noise/Low Power/I2C Bus/256 Taps

The ISL90810 integrates a digitally controlled potentiometer (XDCP) 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. When powered on the ISL90810’s wiper will always commence at mid-scale (128 tap position).

Features

• 256 resistor taps - 0.4 resolution

• I2C serial interface with write/read capability

• Power-on preset to mid-scale (128 tap position)

• Wiper resistance: 70Ω typical @ 3.3V

• Standby current 5µA max

• Power supply: 2.7V to 5.5V

• 50kΩ, 10kΩ total resistance

• 8 Ld MSOP

• Pb-free plus anneal available (RoHS compliant)