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/MAX5410EEE+T 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).
Feature
Log Taper with 2dB Steps Between Taps
32-Tap Positions for Each Wiper
Small 16-Pin QSOP/QFN Packages
Single-Supply Voltage Operation
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
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
