ISL22446

NOT RECOMMENDED FOR NEW DESIGNS DATASHEET RECOMMENDED REPLACEMENT PART ISL22446 ISL22424 FN6181 Quad Digitally Controlled Potentiometer (XDCP™) Low Noise, Low Power, SPI™ Rev 2.00 Bus, 128 Taps September 9, 2009 The ISL22446 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 SPI serial 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 DCP’s IVR to the corresponding WR. The DCPs can be used as three-terminal potentiometers or as two-terminal variable resistors in a wide variety of applica...