National Semiconductor | High-performance Analog

 

 LM4811   
LM4811 Dual 105mW Headphone Amplifier with Digital Volume Control and Shutdown Mode 		Click link to Download

Features
  • Digital volume control range from +12dB to -33dB
  • LD and MSOP surface mount packaging
  • "Click and Pop" suppression circuitry
  • No bootstrap capacitors required
  • Low shutdown current

    • Description

    The LM4811 is a dual audio power amplifier capable of delivering 105mW 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. Since the LM4811 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems.

    The LM4811 features a digital volume control that sets the amplifier's gain from +12dB to -33dB in 16 discrete steps using a two-wire interface.

    The unity-gain stable LM4811 also features an externally controlled, active-high, micropower consumption shutdown mode. It also has an internal thermal shutdown protection mechanism.

    Key Specification
    THD+N at 1kHz, 105mW continuous average output power into 160.1% (typ)
    THD+N at 1kHz, 70mW continuous average power into 320.1% (typ)
    Shutdown Current0.3µA (typ)


    Applications

  • Cellular Phones
  • MP3, CD, DVD players
  • PDA's
  • Portable electronics




    • Typical Application
    click for larger image


    		Connection Diagram
    click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    Supply Current 1.3 mA
    User Supply 5 Volt
    Power@ 16Ohms, 1% THD 0.13 Watt
    Power@ 16Ohms, 10% THD 0.16 Watt
    THD 0.03 %
    PSRR 60 dB
    SNR 106 dB
    Channels 2 Channels
    Shutdown Type High
    Supply Min 2 Volt
    Supply Max 5.5 Volt
    Volume Control Up/Down
    Exposed DAP Yes
    Output Configuration Capacitor Coupled
    Special Features Up/Down Volume
    Temperature Min -40 deg C
    Temperature Max 85 deg C
    Power@ 8Ohms, 1% THD 0.15 Watt
    Power@ 8Ohms, 10% THD 0.18 Watt
    THD Conditions Po=50mW @ R=32 ohms, f=20Hz to 20kHz
    PSRR Conditions f=217 Hz
    SNR Conditions Po=.08W
    Supply Range +2.0 - +5.5 V
    Capless Headphone No

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM4811LD/NOPB

    LM4811LD

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AITGAsia Pacific1001
    DIGI-KEYWorldwide0
    RS COMPONENTSWorldwide4965
    		$0.51 each at 1K+ pcsreel
    of
    1000
    LM4811LDX/NOPB

    LM4811LDX

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AITGAsia Pacific1001
    DIGI-KEYWorldwide0
    		$0.51 each at 1K+ pcsreel
    of
    4500
    LM4811MM/NOPB

    LM4811MM

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1755
    DIGI-KEYWorldwide2588
    FARNELLEurope and Asia1032
    MOUSERWorldwide985
    NEWARKAmericas454
    RS COMPONENTSWorldwide575
    TAYLORAmericas1755
    		$0.51 each at 1K+ pcsreel
    of
    1000
    LM4811MMX/NOPB

    LM4811MMX

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AITGAsia Pacific1001
    BRITESTONESouth Korea3500
    DIGI-KEYWorldwide0
    		$0.51 each at 1K+ pcsreel
    of
    3500

    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 LM4811.

    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 LM4811 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM4811LD/NOPB

    LM4811LD
    		20.523
    20.595
    		LLP103
    1    		260
    235    		DetailDownloadN/A
    		ZXYTT
    G11
    LM4811LDX/NOPB

    LM4811LDX
    		20.523
    20.595
    		LLP103
    1    		260
    235    		DetailDownloadN/A
    		ZXYTT
    G11
    LM4811MM/NOPB

    LM4811MM
    		29.841
    30.002
    		MINI SOIC101
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    G11
    LM4811MMX/NOPB

    LM4811MMX
    		29.841
    30.002
    		MINI SOIC101
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    G11

    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 LM4811.

    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 LM4811 is located at RoHS Status.

    CAD Symbols and Models
    Download LM4811 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM4811LDCS065247473430552700011568301341
    LM4811LDXCS065247473430552700011568301341
    LM4811MMCS065247473430552700011568301341
    LM4811MMXCS065247473430552700011568301341

    Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

    For more information on Reliability Metrics, please click here.


    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 LM4811.

    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 LM4811 is located at RoHS Status.

    [Information as of 9-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation