The X9111 is a single supply, low power, 1024-tap/SPI bus single digitally-controlled (XDCP™) potentiometer.
The X9111 integrates a digitally controlled potentiometer (XDCP) on a monolithic CMOS IC. It provides 1024 resistor taps (10‑bit resolution) and can be used as a three‑terminal potentiometer or a two‑terminal variable resistor. The device is accessed via an SPI serial interface and includes four non‑volatile data registers plus a volatile wiper counter register.
Typical applications include gain control in amplifiers, voltage reference generation, audio volume control, sensor signal conditioning, and RF biasing. The part is supplied in a 14‑lead thin‑shrink small‑outline plastic package (TSSOP) and operates from 2.7 V to 5.5 V with standby current below 3 µA.
| Resistor taps | 1024 |
|---|---|
| Supply voltage range | 2.7 V to 5.5 V |
| Data retention | 100 years |
| Endurance | 100,000 data changes per bit per register |
| Package | 14‑lead TSSOP |
| Non‑volatile data registers | 4 |
It uses an SPI serial interface for read, write, and transfer operations.
The X9111 provides four non‑volatile data registers.