32-Tap Audio Logarithmic Taper Digital Potentiometer

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Active: In Production.


The MAX5407 SOT-PoT™ is a logarithmic taper digital potentiometer with 32 tap points that has 1dB steps between taps. This device is ideal for audio applications, such as volume control and fading/balancing audio signals.

The MAX5407 consists of a resistor string and CMOS switches that are digitally controlled through a simple 2-wire serial interface. This device performs the same function as a mechanical potentiometer. The device has a fixed end-to-end resistance of 20kΩ and features zero-crossing detection to minimize the audible noise generated by the wiper transitions.

This device has nominal resistor temperature coefficients of 35ppm/°C end-to-end and 5ppm/°C ratiometric. The MAX5407 is available in a space saving 8-pin SOT23 package and is guaranteed from -40°C to +85°C.

Data Sheet

Download this datasheet in PDF formatDownload Rev 0 (PDF, 168kB)
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Key Features

  • Miniature 3mm x 3mm 8-Pin SOT23 Package
  • Logarithmic Taper with 1dB Steps Between Taps
  • 32 Tap Positions
  • Low 0.35µA Supply Current
  • +2.7V to +5.5V Single-Supply Operation
  • Zero-Crossing Detection to Minimize Audible Clicks During Wiper Transitions
  • Simple Up/Down 2-Wire Serial Data Interface
  • Power-On Reset
    • Wiper Goes to Maximum Attenuation (Lowest Tap Position)
  • 20kΩ End-to-End Resistance


  • Audio Volume Control
  • Fading/Balancing Audio Signals
  • Mechanical Potentiometer Replacements

Key Specifications:

Digital Potentiometers
Part Number Taper POTs Control Interface Wiper Memory Steps REND-TO-END
Res. Tol.
Temp. Coeff.
Wiper Resistance
typ typ max See Notes
MAX5407  Log 1 Direction+Clock Volatile 32 20 25 35 400 0.35 $0.96 @1k
See All Digital Potentiometers (128)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX5407: Functional Diagram
Functional Diagram

More Information

Topmark Coding MAX5407
New Product Press Release   2002-02-11 ]

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Document Ref.: 19-2196 Rev 0; 2001-11-20
This page last modified: 2009-10-15