FMD offers a wide selection of low-to-high resolution digitally controlled potentiometers, also known as digital potentiometers, or digpots, in single dual and quad configurations. Available in both linear and non-linear tapers, these digital potentiometers replace mechanical potentiometers and trim resistors in applications where digital control alllows microprocessor interfacing and extended functionality.
Both volatile and nonvolatile memory digipots are available. In some applications, digital potentiometers require nonvolatile memory function. A nonvolatile digital pot is very similar to its mechanical counterpart because it retains the programmed resistance value, regardless of external conditions such as whether or not the supply voltage is present. The internal stored value guarantees the same resistor settings after power is applied. Volatile digital pot losses its programmed resistance value after power is lost. Its resistor value defaults to a predefined setting when powered up.
