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