Some applications require the use of potentiometers with nonlinear resistor characteristics.
The DS1666 was designed with an audio taper resistance curve. The DS1666 is a single potentiometer with 128 possible wiper positions. Communication with the DS1666 is accomplished via a 3-wire interface used to increment or decrement the position of the wiper. The DS1801 is a dual audio taper potentiometer having logarithmic resistive characteristics over the device range. Each potentiometer provides 64 wiper positions with a 1 dB increment per step and device mute.