X9429

DATASHEET X9429 Low Noise/Low Power/2-Wire Bus Single Digitally Controlled Potentiometer (XDCP™) FN8248 Rev 4.00 October 16, 2015 The X9429 integrates a single digitally controlled potentiometer (XDCP) on a monolithic CMOS integrated circuit. The digital controlled potentiometer is implemented using 63 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. The potentiometer has associated with it a volatile Wiper Counter Register (WCR) and a four non-volatile Data Registers 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 the default data register (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 VCC Features Single Voltage Potentiometer 64 Resistor Taps 2-wire Serial Interface for Write, Read, and Transfer Operations of the Potentiometer Wiper Resistance, 150W Typical at 5V Non-Volatile Storage of Multiple Wiper Positions Power-on Recall. Loads Saved Wiper Position on Power-up. Standby Current < 3µA Max VCC : 2.7V to 5.5V Operation 2.5kW, 10kW Total Pot Resistance Endurance: ...