DATASHEET
X9401
Low Noise/Low Power/SPI Bus Quad, 64 Tap, Digitally Controlled Potentiometer (XDCP™)
FN8190 Rev 5.00 S...
DATASHEET
X9401
Low Noise/Low Power/SPI Bus Quad, 64 Tap, Digitally Controlled Potentiometer (XDCP™)
FN8190 Rev 5.00 September 14, 2015
Description
The X9401 integrates 4 digitally controlled potentiometers (XDCP) on a monolithic
CMOS integrated microcircuit.
The digitally controlled potentiometer is implemented using 64 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. Each potentiometer has associated with it a volatile Wiper Counter Register (WCR) and 4 nonvolatile Data Registers (DR0:DR3) that can be directly written to and read by the user. The contents of the WCR controls the position of the wiper on the resistor array through the switches. Power-up recalls the contents of DR0 to the WCR.
The XDCP can be used as a three-terminal potentiometer or as a two-terminal variable resistor in a wide variety of applications including control, parameter adjustments, and signal processing.
Block Diagram
Features
Quad - 4 Separate Pots, 64 Taps/Pot Nonvolatile Storage of Wiper Position Four Nonvolatile Data Registers for Each Pot 16-bytes of EEPROM Memory SPI Serial Interface RTOTAL = 10k Wiper Resistance = 150 Typical Standby Current < 3µA (Total Package) Operating Current < 700µA max. VCC = 2.7V to 5V 24 Ld SOIC and 24 Ld TSSOP Package 100 year Data Retention Pb-Free Available (RoHS...