X9251
Quad Digitally-Controlled (XDCP™) Potentiometer
Key Features
- Four potentiometers in one package
- 256 resistor taps-0.4% resolution
- SPI Serial Interface for write, read, and transfer operations of the potentiometer
- Wiper resistance: 100Ω typical @ VCC = 5V
- 4 Non-volatile data registers for each potentiometer
- Non-volatile storage of multiple wiper positions
- Standby current <5µA max
- VCC: 2.7V to 5.5V Operation
- 50kΩ, 100kΩ versions of total resistance
- 100 year data retention
- Single supply version of X9250
- Endurance: 100,000 data changes per bit per register
- 24 Ld SOIC, 24 Ld TSSOP
- Low power CMOS
- Pb-free plus anneal available (RoHS compliant)
Description
The X9251 integrates four digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated circuit.
The digitally controlled potentiometers are imple-mented with a combination of resistor elements and CMOS switches. The position of the wipers are controlled by the user through the SPI bus interface. Each potentiometer has associated with it a volatile Wiper Counter Register (WCR) and four non-volatile 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.
