X9428
Single Digitally Controlled Potentiometer (XDCP™)
Not Recommended for New Designs.
Recommended Replacement Parts ISL22316, ISL22319.
Typical Diagram
Key Features
- Solid state potentiometer
- 2-wire serial interface
- Register oriented format
- Direct Read/Write/Transfer wiper position
- 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
- Ideal for battery operated applications
- High reliability
- Endurance-100,000 Data changes per bit per register
- Register data retention-100 years
- 4-bytes of nonvolatile memory
- 10kΩ resistor array
- Resolution: 64 taps each potentiometer
- 16 Ld SOIC, 14 Ld TSSOP packages
- Pb-free plus anneal available (RoHS compliant)
Description
The X9428 integrates a 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 2-wire bus interface. Each 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 through the switches. Power-up recalls the contents of 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.
