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

I

2C 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.

The DCP can be used as a three-terminal potentiometer or

as a two-terminal variable resistor in a wide variety of

applications including control, parameter adjustments, and

signal processing.

Features

• 128 resistor taps

• I2C serial interface

- Two address pins, up to four devices/bus

• Non-volatile storage of wiper position

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

• Shutdown mode

• Shutdown current 5µA max

• Power supply: 2.7V to 5.5V

• 50kor 10k 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)