X9420

X9420 NOT RECOMMENDED FOR NEW DESIGNS POSSIBLE SUBSTITUTE PRODUCT ISL22416, ISL22419, ISL95311, ISL95711 Low Noise/Low Power/SPI Bus Single Digitally Controlled (XDCP™) Potentiometer DATASHEET FN8195 Rev.1.00 April 26, 2006 FEATURES Solid-State Potentiometer SPI Serial Interface Register Oriented Format —Direct read/write/transfer wiper positions —Store as many as four positions per potentiometer Power Supplies —VCC = 2.7V to 5.5V —V+ = 2.7V to 5.5V —V– = -2.7V to -5.5V Low Power CMOS —Standby current < 1µA High Reliability —Endurance–100,000 data changes per bit per register —Register data retention–100 years 8-bytes of Nonvolatile EEPROM Memory 10k or 2.5k Resistor Arrays Resolution: 64 Taps Each Pot 14 Ld TSSOP and 16 Ld SOIC Packages Pb-Free Plus Anneal Available (RoHS Compliant) DESCRIPTION The X9420 integrates a single digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated microcircuit. 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 bus interface. The potentiometer has associated with it a volatile Wiper Counter Register (WCR) and 4 nonvolatile 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 thr...