National Semiconductor | High-performance Analog

 

 LM4908   

LM4908 10kV ESD Rated, Dual 120mW Headphone Amplifier
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Features
  • Up to 10kV ESD protection on all pins
  • MSOP, SOP, and LLP surface mount packaging
  • Switch on/off click suppression
  • Excellent power supply ripple rejection
  • Unity-gain stable
  • Minimum external components
  • Description

    The LM4908 is a dual audio power amplifier capable of delivering 120mW per channel of continuous average power into a 16 load with 0.1% (THD+N) from a 5V power supply.

    Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components using surface mount packaging. Since the LM4908 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems.

    The unity-gain stable LM4908 can be configured by external gain-setting resistors.

    Key Specification
    THD+N at 1kHz at 120mW continuous average output power into 160.1% (typ)
    THD+N at 1kHz at 75mW continuous average output power into 320.1% (typ)
    Output power at 0.1% THD+Nat 1kHz into 3275mW (typ)


    Applications

  • Headphone Amplifier
  • Personal Computers
  • Portable electronic devices



  • Typical Application
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    Connection Diagram
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    Typical Performance
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    Datasheets
    TitleSizeDateOther
    Language
    LM4908 LM4908 10kV ESD Rated, Dual 120mW Headphone Amplifier935
    Kbytes
    23-Feb-04   

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM4908LQ
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008
    LM4908LQX
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008
    LM4908MA
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008
    LM4908MAX
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008
    LM4908MM
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008
    LM4908MMBD
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008
    LM4908MMX
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM4908.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM4908 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM4908LQBD
    LM4908 10kV ESD Rated, Dual 120mW Headphone AmplifierFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $200.00 each1

    The LM4908 is a dual, 120mW per channel, headphone amplifier. Since the LM4908 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems.

    This LM4908LQBD is an evaluation board designed to ease the evaluation and effort during the development of a circuit using the LM4908LQ. It is an easy to use stand-alone board that requires power and GND, an input signal and an output load.

    Features:

    • Up to 10kV ESD protection on all pins
    • LLP surface mount packaging
    • Switch on/off click suppression
    • Excellent power supply ripple rejection
    • Unity-gain stable
    • Minimum external components

    Applications:

    • Headphone Amplifier
    • Personal Computers
    • Portable electronic devices

    EvaluaContents:

    • Fully Assembled LM4908LQ Evaluation Board
    • Instructions for where to locate and download the datasheet

    Please note: application information and board layout can be found in datasheet




    National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

    Lead Free product status is available through the search tool located here

    Part Number(s)
    (NSID)
    Weight
    (milligrams)
    TypePinsMSL RatingPeak ReflowRoHS
    Status
    CAD SymbolsModelsPackage
    Marking
    Format

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM4908.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM4908 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM4908LQ
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008
    LM4908LQX
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008
    LM4908MA
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008
    LM4908MAX
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008
    LM4908MM
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008
    LM4908MMBD
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008
    LM4908MMX
    LM4911MM
    NATIONAL SEMICONDUCTOR
    16 Nov 2008

    [Information as of 9-Feb-2012]