X9400

DATASHEET X9400 Low Noise/Low Power/SPI Bus Quad Digitally Controlled Potentiometers (XDCP™) FN8189 Rev 4.00 September 2, 2015 FEATURES Four potentiometers per package 64 resistor taps SPI serial interface for write, read, and transfer operations of the potentiometer Wiper resistance, 40 typical at 5V. Four non-volatile data registers for each potentiometer Non-volatile storage of multiple wiper position Power-on recall. Loads saved wiper position on power-up. Standby current < 1µA max System Analog VV+C/VC:–:2-.57VV to to 5.5V +5V operation 10k, 2.5k end to end resistance 100 yr. data retention Endurance: 100,000 data changes per bit per register Low power CMOS 24 Ld SOIC and 24 Ld TSSOP Pb-free plus anneal available (RoHS compliant) DESCRIPTION The X9400 integrates four digitally controlled potentiometers (XDCPs) on a monolithic CMOS integrated circuit. The digitally 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 SPI serial bus interface. Each potentiometer has associated with it a volatile Wiper Counter Register (WCR) and four nonvolatile Data Registers (DR0-3) 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 switch...