DS1800 Datasheet (Dallas Semiconducotr) - Dual Inverting Log Gain/Attenuator

DS1800, Dual Inverting Log Gain/Attenuator

The DS1800 is a dual audio-taper potentiometer designed specifically for use in the feedback path of the inverting configuration of an operational amplifier (see Figure 2).

In this configuration, the DS1800 provides a VO /VI relationship of -20log(RF/RI), giving a gain/attenuation range covering +20

DS1800 Features

* Ultra-low power consumption Operates from 3V or 5V supplies Two digitally controlled, 128-position potentiometers including mute Logarithmic gain characteristics Zero-crossing detection eliminates noise caused by discrete wiper changes Two control interfaces - 3-wire serial CPU control - Pushbutton