Overview: POSSIOBBLSEOSLUEBXTS9E5TP8IT4RU0OTDEUPDCRaTOtaDSUhCeTet ISL90840
Quad Digitally Controlled Potentiometers (XDCP™) November 14, 2006 FN8086.2 Low Noise, Low Power I2C® Bus, 256 Taps
The ISL90840 integrates four digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated circuit.
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. The contents of the WR controls the position of the wiper. When powered on the ISL90810’s wiper will always mence at mid-scale (128 tap position).
The DCPs can be used as three-terminal potentiometers or as two-terminal variable resistors in a wide variety of applications including control, parameter adjustments, and signal processing.
Pinout
ISL90840 (20 LD TSSOP)
TOP VIEW RH3 1 RL3 2 RW3 3
A2 4 SCL 5 SDA 6 GND 7 RW2 8 RL2 9 RH2 10 20 RW0 19 RL0 18 RH0 17 D.N.C.
