The X9400 is a low noise, low power, SPI bus quad digitally controlled potentiometer. It features four potentiometers, 64 resistor taps, SPI serial interface, 40Ω wiper resistance, four non-volatile data registers, power-on recall, standby current < 1µA, and more.
The X9400 integrates four digitally controlled potentiometers (XDCPs) on a single CMOS IC, providing 64 resistor taps per pot and a SPI serial interface for read, write, and transfer operations. It offers non‑volatile storage, power‑on recall, and low standby current, making it suitable for control, parameter adjustment, and signal‑processing applications.
The datasheet includes feature highlights, ordering information, pin descriptions, instruction set details, and package dimensions for both 24‑lead SOIC and TSSOP variants. It also outlines the internal architecture such as the Wiper Counter Register, Data Registers, and the command sequences used to program the device.
| Number of potentiometers | Four |
|---|---|
| Resistor taps per potentiometer | 64 |
| Interface | SPI serial interface |
| Wiper resistance | 40Ω typical at 5V |
| Non‑volatile data registers per potentiometer | Four |
| Standby current | < 1A max |
| Operating voltage range | 2.7V to 5.5V |
| Analog supply range | -5V to +5V |
| End‑to‑end resistance | 10kΩ, 2.5kΩ |
| Data retention | 100 years |
| Endurance | 100,000 data changes per bit per register |
| Package type | 24‑lead SOIC (300 mil) |
The X9400 uses an SPI serial interface for write, read, and transfer operations.
The device contains four digitally controlled potentiometers per package.
Standby current is specified as less than 1 A max.
Data can be retained for up to 100 years.