The X9421 is a single digitally controlled potentiometer (XDCP) integrated circuit that features a 64-tap resistor array, SPI serial interface, and non-volatile storage of multiple wiper positions.
Key Features
Single voltage potentiometer with 64 resistor taps
SPI serial interface for write, read, and transfer operations of the potentiometer wiper resistance
4 non-volatile data registers for storing multiple wiper positions
Power-on recall loads saved wiper position on power-up
Standby current: 2.5μA max at Vcc = 2.7V to 5.5V operation
2.5kΩ or 10kΩ end-to-end resistance
Applications
The X9421 can be used in a wide variety of applications, including:
Control and parameter adjustments
Signal processing
Circuit level applications, such as varying gain, providing programmable DC reference voltages, and controlling volume in audio circuits
System level applications, such as adjusting contrast in LCD displays, controlling power level of LED transmitters, and setting DC biasing points in RF power amplifiers
Manual:
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