Analog Switches | FSA8028

Audio Jack Detection and Configuration Switch

Obsolete

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Overview

The FSA8028 is an audio jack detector and switch for 3- or 4-pole accessories. In addition to detection, the FSA8028 features an integrated MIC switch that allows the processor to configure the audio jack. The architecture is designed to allow common third-party headphones to be used for listening to music from mobile handsets, personal media players, and portable peripheral devices.

  • Determines 3- or 4-Pole Audio Jacks
  • Removes Audio Jack Pop-n-Click Caused by MIC Bias
  • Detects Audio Jack Accessories:
    • Standard Headphones
    • Headsets with MIC
    • Send / End Button Presses
  • Integrates a MIC Switch for 4-Pole Configuration

    • PMP/MP3 Player
    • Mobile Handsets

    • Detection: Accessory Plug-In 3- or 4-Pole Audio Jack Send/End Key Pressed
    • Functionality: Decreased Timing for Sensitive Send/End Keys
    • Switch Type: MIC
    • VDD: 2.5 to 4.4 V
    • VIO: 1.6 to VDD
    • THD (MIC): 0.01% Typical
    • ESD (Air Gap): 15 kV
    • Operating Temperature: -40°C to 85°C
    • Package: 10-Lead UMLP 1.4x1.8x0.5 mm, 0.4 mm Pitch
    • Top Mark: KZ

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    FSA8028UMX

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    Obsolete

    CAD Model

    Pb

    A

    H

    P

    UQFN-10

    523BC

    1

    260

    REEL

    5000

    N

    1

    1

    SPST

    25

    2.9

    2.5

    4.4

    Price N/A

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