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