DATASHEET
X9111 FN8159
Rev 5.00
October 13, 2016 Single Supply/Low Power/1024-Tap/SPI Bus/Single Digitally-Controlled (XDCPв„ў)
Potentiometer
The X9111 integrates a single, digitally controlled
potentiometer (XDCP) on a monolithic CMOS integrated circuit.
The digital controlled potentiometer is implemented using
1023 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 four nonvolatile Data Registers that can be
directly written to and read by the user. The contents of the
WCR control the position of the wiper on the resistor array
through the switches. Power-up recalls the contents of the
default data register (DR0) to the WCR.
The XDCP can be used as a 3-terminal potentiometer or as a
2-terminal variable resistor in a wide variety of applications
including control, parameter adjustments, and signal
processing. Features 1024 resistor taps – 10-bit resolution SPI serial interface for write, read, and transfer operations of
the potentiometer Wiper resistance, 40О© typical at 5V Four nonvolatile Data Registers Nonvolatile storage of multiple wiper positions Power-on recall, loads saved wiper position on power-up Standby current <3ВµA maximum VCC: 2.7V to 5.5V operation 100kО© end-to-end resistance 100-year data retention Endurance: 100,000 data changes per bit per register 14 Ld TSSOP Low-power CMOS Single supply version of the X9110 Pb-Free (RoHS compliant) VCC SPI …