DATASHEET
X9258 FN8168
Rev 6.00
December 15, 2011 Low Noise/Low Power/2-Wire Bus/256 Taps Quad Digital Controlled
Potentiometers (XDCPв„ў)
The X9258 integrates 4 digitally controlled potentiometers
(XDCPв„ў) on a monolithic CMOS integrated circuit. Features Four potentiometers in one package The digitally controlled potentiometer 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 2-wire bus interface. Each
potentiometer has associated with it a volatile Wiper Counter
Register (WCR) and 4 non-volatile 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 though the switches. Power-up
recalls the contents of DR0 to the WCR. 256 resistor taps/potentiometer. 0.4% resolution 2-wire serial interface Wiper resistance, 40О©пЂ typical @ V+ = 5V, V-= -5V Four nonvolatile data registers for each potentiometer Nonvolatile storage of wiper position Standby current <5ВµA max (total package) Power supplies
-VCC = 2.7V to 5.5V
-V+ = 2.7V to 5.5V
-V-= -2.7V to -5.5V The XDCPв„ў 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. 100kО©, 50kО©пЂ total potentiometer resistance High reliability …