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).
Key Features
Applications/Uses
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
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