32 taps digitally controlled buffered potentiometer

Multistage architectures for high resolution digital potentiometers

“…The wiper position is usually stored in a volatile wiper control register, which is reset to a default value at power-up. Digital potentiometers with more complex architectures can store the preferred wiper positions in one or more non-volatile registers and recall the potentiometer's settings by reloading the stored value into the wiper control register upon power-up, or whenever required by the user [1], [2]. Control instructions and data are transferred between the potentiometer and controller through the serial interface.…”