ISL90840 Overview
The digitally controlled potentiometers are implemented with a bination 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) that can be directly written to and read by the user.
ISL90840 Key Features
- Four potentiometers in one package
- 256 resistor taps
- 0.4% resolution
- I2C serial interface
- Three address pins, up to eight devices/bus
- Write/Read capability
- Power-on preset to mid-scale (128 tap position)
- Wiper resistance: 70 typical @ 3.3V
- Standby current <5µA max
- Power supply: 2.7V to 5.5V