Low Noise, Low Power I2C™ Bus, 128 Taps

The ISL22316 integrates a single digitally controlled potentiometer (DCP) and non-volatile memory on a monolithic CMOS integrated circuit.

The digitally controlled potentiometer is 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. The potentiometer has an associated volatile Wiper Register (WR) and a non-volatile Initial Value Register (IVR) that can be directly written to and read by the user. The contents of the WR controls the position of the wiper. At power-up, the device recalls the contents of the DCP’s IVR to the WR.

Features

• 128 resistor taps

• I2C serial interface

- Two address pins, up to four devices/bus

• Non-volatile storage of wiper position

• Wiper resistance: 70Ω typical @ VCC = 3.3V

• Shutdown mode

• Shutdown current 5µA max

• Power supply: 2.7V to 5.5V

• 50kΩ or 10kΩ total resistance

• High reliability

- Endurance: 1,000,000 data changes per bit per register

- Register data retention: 50 years @ T ≤ +55°C

• 10 Ld MSOP or 10 Ld TDFN package

• Pb-free (RoHS compliant)