DS1800

DS1800 Dual Inverting Log Gain/Attenuator www.dalsemi.com 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 control 20-pin DIP (300-mil), 20-pin SOIV (300mil), and 20-pin (173-mil) TSSOP packaging available Operating Temperature Range: - Industrial: -40°C to +85°C Software and hardware mute Standard Resistance Available: 53KΩ PIN ASSIGNMENT GND COUT CLK D RST ZCEN MODE W0 OUT0 IN0 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC P1G P1A P0G P0A MUTE AGND IN1 OUT1 W1 20-Pin DIP (300-mil) 20-Pin SOIC (300-mil) 20-Pin TSSOP See Mech. Drawings Section PIN DESCIPTION OUT0,OUT1 IN0, IN1 W0,W1 VCC RST CLK D COUT P0G,P1G P0A,P1A ZCEN MUTE AGND GND - Low-end of resistor High-end of resistor Wiper Terminal 3V or 5V Power Supply Input Serial Port Reset Input Serial Port Clock Input Serial Port Data Input Cascade Data Output Gain Input Pot Controls Attenuation Input Pot Controls Zero-Crossing Detect Input Hardware Mute Control Input Analog Ground Ground 1 of 14 032000 DS1800 DESCRIPTION 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 relation...