X9259 Datasheet | Renesas

Single Supply/Low Power/256-Tap/2-Wire Bus Quad Digitally-Controlled (XDCP™) Potentiometers FN8169 Rev 6.00 December 12, 2014 The X9259 integrates four digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated circuit. The digitally controlled potentiometers are implemented with a bination of resistor elements and CMOS switches. The position of the wipers are controlled by the user through the 2-wire bus interface. Each potentiometer has associated with it a volatile Wiper Counter Register (WCR) and four nonvolatile Data Registers that can be directly written to and read by the user. The content of the WCR controls the position of the wiper. At power-up, the device recalls the content of the default Data Registers of each DCP (DR00, DR10, DR20, and DR30) to the corresponding 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. Features - Four separate potentiometers in one package - 256 resistor taps- 0.4% resolution - 2-wire serial interface for write, read, and transfer operations of the potentiometer - Wiper resistance: 100Ω typical at VCC = 5V - 4 nonvolatile data registers for each potentiometer - Nonvolatile storage of multiple wiper positions - Standby current <5µA max - VCC: 2.7V to 5.5V operation - 50kΩ version of total resistance - Endurance: 100,000 data changes per bit per register - 100 year data retention - Single supply version of X9258 - 24 Ld SOIC, 24 Ld TSSOP - Low power CMOS - Pb-Free (Ro HS pliant) Functional Diagram RH0 RH1 RH2 RH3 A3 A2 A1 A0 SDA SCL 2-WIRE INTERFACE POWER UP, INTERFACE CONTROL AND...