ISL90840WAV2027ZT2

ISL90840 UCT T PROD E T E O DU C L TE P R OBSO U IT T BS Data Sheet LE SU 95840 X POSSIB Quad Digitally Controlled Potentiometers (XDCP™) November 14, 2006 FN8086.2 Low Noise, Low Power I2C® Bus, 256 Taps Features The ISL90840 integrates four digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated circuit. • Four potentiometers in one package • 256 resistor taps - 0.4% resolution • I2C serial interface - Three address pins, up to eight devices/bus 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) 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). - Write/Read capability • Power-on preset to mid-scale (128 tap position) • Wiper resistance: 70 typical @ 3.3V • Standby current