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ISL22346

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Quad Digitally Controlled Potentiometers (XDCP™); Low Noise, Low Power I2C™ Bus, 128 Taps

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ISL22346 Datasheet

Overview

The ISL22346 integrates four digitally controlled potentiometers (DCP) and non-volatile memory 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 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 two DCP's IVR to the corresponding WRs. The DCPs can be used as a three-terminal potentiometers or as a two-terminal variable resistors in a wide variety of applications including control, parameter adjustments, and signal processing.

ISL22346 Functional Diagram
ISL22346 Functional Diagram
  • Four potentiometers in one package
  • 128 resistor taps
  • I2C serial interface
  • Three address pins, up to eight 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
  • 20 Ld TSSOP or 20 Ld TQFN package
  • Pb-free (RoHS compliant)

Documentation

Design & Development

Software Downloads
Type Title Date
Library
DCP Evaluation Board Software v6.03
EXE 2.56 MB
1 item

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