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Low-Power Headset Detectors with SEND/END Button Support

Complete Audio Headset Jack Detection Solution

Product Details

Key Features

Simplified Block Diagram

Technical Docs

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Key Features

  • 3.5mm Jack Insertion Detection
  • Simple Interface: One Input/Two Open-Drain Outputs
  • Low-Power Microphone Mode
  • Low-Noise, High-PSRR Microphone Bias Generator
  • Click-and-Pop Suppression
  • High-ESD Protection on MIC and DETIN Inputs
    • ±15kV Human Body Model (HBM)

Applications/Uses

  • Cell Phones
  • e-Readers
  • Tablet PCs

Description

The MAX14579E/MAX14579AE provide a simple solution for detecting the insertion and managing the operation of a 3.5mm stereo headset with a microphone. These devices integrate all circuitry required to detect SEND/END button press events and generate required microphone bias voltages.

The devices are managed with only three GPIOs from the host controller to select between call mode and standby mode, and monitor the SEND/END and jack insertion status. In call mode, the low-noise LDO is enabled to provide DC bias to the externally preamplified microphone. In standby mode, microphone low-power pulsing is enabled to reduce supply current while waiting for a SEND/END button press event. Two open-drain outputs signal the host controller when an insertion/removal or SEND/END button press event occurs.

The MAX14579E/MAX14579AE manage jack insertion detection by monitoring a 3.5mm socket with a normally open jack insertion switch.

The devices are available in an 8-pin TDFN package, and are fully specified over the -40°C to +85°C extended temperature range.

Simplified Block Diagram

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 .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.