DATASHEET
X9401 FN8190
Rev 5.00
September 14, 2015 Low Noise/Low Power/SPI Bus Quad, 64 Tap, Digitally Controlled Potentiometer
(XDCPв„ў) Description Features The X9401 integrates 4 digitally controlled potentiometers
(XDCP) on a monolithic CMOS integrated microcircuit. Quad -4 Separate Pots, 64 Taps/Pot 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. Nonvolatile Storage of Wiper Position Four Nonvolatile Data Registers for Each Pot 16-bytes of EEPROM Memory SPI Serial Interface RTOTAL = 10kпЃ— Wiper Resistance = 150пЃ— Typical Standby Current < 3ВµA (Total Package) Operating Current < 700ВµA max. VCC = 2.7V to 5V 24 Ld SOIC and 24 Ld TSSOP Package 100 year Data Retention Pb-Free Available (RoHS Compliant) Block Diagram
POT 0 VCC
VSS R0 R2 HOLD R1 R3 VH0/RH0 WIPER
COUNTER …
