General Description
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).

Features
♦ 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

Applications
    Stereo Volume Control
    Fading and Balancing Stereo Signals
    Mechanical Potentiometer Replacement