X9401
Quad, 64 Tap, Digitally Controlled Potentiometer (XDCP™)
Key Features
- Quad - 4 Separate Pots, 64 Taps/Pot
- Nonvolatile Storage of Wiper Position
- Four Nonvolatile Data Registers for Each Pot
- 16-bytes of EEPROM Memory
- SPI Serial Interface
- RTOTAL = 10kΩ
- Wiper Resistance = 150Ω Typical
- Standby Current < 3µA (Total Package)
- Operating Current < 700µA max.
- VCC = 2.7V to 5V
- 24 Ld SOIC and 24 Ld TSSOP Package
- 100 year Data Retention
- Pb-Free Available (RoHS Compliant)
Description
The X9401 integrates 4 digitally controlled potentiometers (XDCP) on a monolithic CMOS integrated microcircuit.
The digitally controlled potentiometer is implemented using 64 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. 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.
