X9409
Quad Digitally Controlled Potentiometers (XDCP™)
Key Features
- Four potentiometers per package
- 64 resistor taps
- 2-wire serial interface for write, read, and transfer operations of the potentiometer
- 50Ω Wiper resistance, typical at 5V.
- Four non-volatile data registers for each potentiometer
- Non-volatile storage of multiple wiper position
- Power-on recall. Loads saved wiper position on power-up.
- Standby current < 1µA typical
- System VCC: 2.7V to 5.5V operation
- 10kΩ, 2.5kΩ End to end resistance
- 100 yr. data retention
- Endurance: 100,000 data changes per bit per register
- Low power CMOS
- 24 Ld SOIC, 24 Ld TSSOP
- Pb-free plus anneal available (RoHS compliant)
Description
The X9409 integrates 4 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.
