X9418
Low Noise, Low Power, 2-Wire Bus Dual Digitally Controlled Potentiometer (XDCP™)
Key Features
- Two potentiometers in one package
- 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
- 8-bytes of nonvolatile memory
- 2.5kΩ, 10kΩ resistor array
- Resolution: 64 taps each potentiometer
- 24-pin plastic DIP, 24-lead TSSOP and 24-lead SOIC packages
- Pb-Free plus anneal available (RoHS compliant)
Description
The X9418 integrates two 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 four 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.
