X9421
NOT RECOMMENDED FOR NEW DESIGNS POSSIBLE SUBSTITUTE PRODUCT ISL22416, ISL22419
Low Noise/Low Power/SPI Bus Single Digitally Controlled (XDCP™) Potentiometer
DATASHEET
FN8196 Rev.
1.
00 January 14, 2009
Description
The X9421 integrates a single digitally controlled potentiometer (XDCP) on a monolithic
CMOS integrated circuit.
The digital controlled potentiometer is implemented using 63 resistive elements in a series array.
Between each element are tap points connected to the wiper terminal through switches.
The position of the wiper on the array is controlled by the user through the SPI bus interface.
The potentiometer has associated with it a volatile Wiper Counter Register (WCR) and...