The MAX5408-MAX5411 dual, logarithmic taper digital potentiometers, with 32-tap points each, replace mechanical potentiometers in audio applications requiring digitally controlled resistors. The MAX5408/MAX5410 are dual potentiometers with one wiper per potentiometer. The MAX5409/MAX5411 are dual potentiometers with two wipers per potentiometer (see Functional Diagram). An SPI™-compatible serial interface controls the wiper positions. The MAX5408- MAX5411 have a factory-set resistance of 10kΩ per potentiometer. A zero-crossing detect feature minimizes the audible noise generated by wiper transitions. The MAX5408-MAX5411 have nominal temperature coefficients of 35ppm/°C end-to-end and 5ppm/°C ratiometric. The MAX5408-MAX5411 are available in 16-pin QSOP and 16-pin thin QFN packages and are specified over the extended temperature range (-40°C to +85°C). Applications * Fading and Balancing Stereo Signals * Mechanical Potentiometer Replacements * Stereo Volume Control * Log Taper with 2dB Steps Between Taps * 32-Tap Positions for Each Wiper * Small 16-Pin QSOP/QFN Packages * Single-Supply Voltage Operation * +2.7V to +3.6V (MAX5408/MAX5409) * +4.5V to +5.5V (MAX5410/MAX5411) * Low 0.5µA Standby Supply Current * Zero-Crossing Detection for Clickless Switching * Mute Function to -90dB * 10kΩ Fixed Resistance Value * 3-Wire SPI-Compatible Serial Data Interface * Power-On Reset: Wiper Goes to Maximum Attenuation * Digital Output for Readback and Daisy-Chaining Capabilities