Intersil X9250TS24Z

Description
The X9250 integrates four digitally controlled potentiometers (XDCPs) on a monolithic CMOS integrated circuit. The XDCP is implemented using 255 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 four nonvolatile Data Registers (DRO:DR3) 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 DRO to the WCR.

Features
Four potentiometers in one package
256 resistor taps/pot - 0.4% resolution
SPI serial interface
Wiper resistance, 400 typical @ Vcc = 5V
Four nonvolatile data registers for each pot
Nonvolatile storage of wiper position
Standby current < 5μA max (total package)
Power supplies
Vcc 2.7V to 5.5V
V 2.7V to 5.5V
V- = -2.7V to -5.5V
100kΩ, 50kΩ total pot resistance
High reliability
Endurance - 100,000 data changes per bit per register
Register data retention - 100 years
24 Ld SOIC, 24 Ld TSSOP
Dual supply version of X9251
Pb-free plus anneal available (RoHS compliant)

Applications
Control
Parameter adjustments
Signal processing