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32-Tap Audio Logarithmic Taper Digital Potentiometer

Product Details

Key Features

Applications/Uses

Simplified Block Diagram

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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

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX5407: Functional Diagram MAX5407: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .