General Description
The MAX5440 dual, 40kΩ logarithmic taper volume control features a debounced up/down interface for use with a simple rotary encoder without using a microcontroller (µC). Each potentiometer has 32 log-spaced tap points with a buffered wiper output and replaces mechanical potentiometers. An integrated bias genera tor provides the required ((VDD + VSS) / 2) bias voltage, eliminating the need for costly external op-amp circuits in unipolar audio applications. A mode-indicator LED output specifies volume or balance control. Five integrated LED drivers indicate volume level or balance settings, depending on the status of the mode indicator.

FEATUREs
♦ Logarithmic Taper Volume Control with (31) 2dB Steps
♦ Low-Power Wiper Buffers Provide 0.003% THD
♦ Single +2.7V to +5.5V or Dual ±2.7V Supply Voltage Operation
♦ Low 0.5µA Shutdown Supply Current
♦ Integrated Bias Voltage Generator
♦ Five-Segment LED Volume/Balance Indicator
♦ Clickless Switching
♦ 40kΩ End-to-End Fixed Resistance Value
♦ Mute Function Toggles to -90dB (typ)
♦ Power-On Reset to -12dBFS Wiper Position

APPLICATIONs
    Stereo Volume Control
    Desktop Speakers
    Multimedia Docking Stations
    Set-Top Boxes
    Automotive Back-Seat Multimedia