DESCRIPTION
The DS1802 is a dual audio taper-potentiometer having logarithmic resistive characteristics over the device range. Each potentiometer provides 65 wiper positions with a 1 dB increment per step and device mute. The DS1802 has two methods of device control, which include contact closure (pushbutton) inputs and a 3-wire serial interface for wiper positioning. The pushbutton control inputs provide a simple interface for device control without the need for a CPU. While the 3-wire serial interface, using a CPU, provides the user the ability of reading or writing exact wiper positions of the two potentiometers. The DS1802 can also be configured to operate in either independent or “stereo” modes when using pushbutton control. Independent mode of operation allows for independent wiper control, and stereo mode of operation provides single input control over both potentiometer wiper positions. The DS1802 is offered in commercial temperature versions. Packages for the part include a 20-pin DIP, 20-pin SOIC, and 20-pin TSSOP.

FEATURES
Ultra-low power consumption
Operates from 3V or 5V supplies
Two digitally controlled, 65-position potentiometers including mute
Logarithmic resistive characteristics (1 dB per step)
Zero-crossing detection eliminates noise caused by wiper movement
Digital or mechanical pushbutton wiper control
Serial port provides means for setting and reading both potentiometers wipers
20-pin SOIC and 20-pin TSSOP for surface mount applications
Operating Temperature Range: -40° C to +85° C
Software and hardware mute
Resistance Available: 45 kW