Everything you wanted to know about digitally programmable potentiometers

The digitally programmable potentiometer (DPP) is a mixed signal device. The analog portion of the device is the three-terminal analog component called potentiometer. The digital portion contains the interface, control and registers associated with the potentiometer. The input signals to the digital section are the external control signals from the serial bus. The outputs of the digital section are internal signals stored in internal volatile and non-volatile registers or signals which move the wiper. This application note by Chuck Wojslaw for Catalyst Semi answers frequently asked questions about the fundamentals of electronic or digitally programmable potentiometers.

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