National Semiconductor | High-performance Analog

 

 LMV1090   

Dual Input, Far Field Noise Suppression Microphone Amplifier from the PowerWise® Family
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Features

  • No loss of voice intelligibility
  • No added processing delay
  • Low power consumption
  • Differential outputs
  • Excellent RF immunity
  • Adjustable 12 - 54dB gain
  • Shutdown function
  • Space-saving 16–bump micro SMD package
  • Description

    The LMV1090 is a fully analog dual differential input, differential output, microphone array amplifier designed to reduce background acoustic noise, while delivering superb speech clarity in voice communication applications.

    The LMV1090 preserves near-field voice signals within 4cm of the microphones while rejecting far-field acoustic noise greater than 50cm from the microphones. Up to 20dB of far-field rejection is possible in a properly configured and using ±0.5dB matched microphones.

    Part of the Powerwise™ family of energy efficient solutions, the LMV1090 consumes only 600μA of supply current providing superior performance over DSP solutions consuming greater than ten times the power.

    The dual microphone inputs and the processed signal output are differential to provide excellent noise immunity. The microphones are biased with an internal low-noise bias supply.

    Key Specification

    Far Field Noise Suppression Electrical *

    34dB (typ)

    SNRIE

    26dB (typ)

    Supply current

    600μA (typ)

    Standby current

    0.1μA (typ)

    Signal-to-Noise Ratio (Voice band)

    65dB (typ)

    Total Harmonic Distortion + Noise

    0.1% (typ)

    PSRR (217Hz)

    99dB (typ)

       *FFNSE at f = 1kHz


    Applications

  • Mobile headset
  • Mobile and handheld two-way radios
  • Bluetooth and other powered headsets
  • Hand-held voice microphones
  • Cell phones
  • Also Recommended
    LMV1088Improved Performance
    LMV1089Improved Performance
    LMV1091Pin Programmable Version Of The LMV1090



    Parameters / ValuesLMV1090 LMV1088 LMV1089 LMV1091
    FunctionBeamforming Beamforming Beamforming Beamforming
    UplinkYes Yes Yes Yes
    DownlinkNo No No No
    Special FeaturesI2C Controlled Auto-calibration Auto-calibration Pin-Programmable Version of LMV1090
    Mono/StereoMono Mono Mono Mono
    Auto CalibrationNo Yes Yes No
    Output TypeDifferential Single-Ended Differential Differential
    Shut downYes No Yes No
    FFNRI (electrical)34 dB 32 dB 32 dB 34 dB
    SNRI (electrical)26 dB 24 dB 24 dB 26 dB
    Supply Current0.6 mA 1 mA 1.1 mA 0.6 mA
    THD0.1 % 0.1 % 0.1 % 0.1 %
    SNR65 dB 60 dB 65 dB 65 dB
    PSRR99 dB 85 dB 96 dB 99 dB
    Supply Min2.7 Volt 2.7 Volt 2.7 Volt 2.7 Volt
    Supply Max5.5 Volt 5.5 Volt 5.5 Volt 5.5 Volt
    User Supply3.3 Volt 3.3 Volt 3.3 Volt 3.3 Volt
    Control SchemeI2C I2C I2C, Bit select Bit select
    Temperature Min-40 deg C -40 deg C -40 deg C -40 deg C
    Temperature Max85 deg C 85 deg C 85 deg C 85 deg C
    PowerWiseYes Yes Yes Yes
    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMV1090TL/NOPB


    RoHS Status


    MICRO SMD
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide124
    DIGI-KEYWorldwide754
    $0.75 each at 1K+ pcsreel
    of
    250
    LMV1090TLX/NOPB


    RoHS Status


    MICRO SMD
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $0.75 each at 1K+ pcsreel
    of
    3000

    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 LMV1090.

    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 LMV1090 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMV1090TLEVAL
    evaluation boardFull production


     
    DistributorRegionQty
    AVNET-EMWorldwide1
    DIGI-KEYWorldwide4
    FARNELLEurope and Asia1
    NEWARKAmericas1
    $150.00 each1



    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
    LMV1090TL/NOPB

    4.813
    MICRO SMD161260DetailDownloadN/A
    XYTT
    I ZA3
    LMV1090TLX/NOPB

    4.813
    MICRO SMD161260DetailDownloadN/A
    XYTT
    I ZA3

    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 LMV1090.

    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 LMV1090 is located at RoHS Status.

    Design Tools
    TitleSizeDate
    LMV1090 Software (Windows) Controls the LMV1090 and Its Operating Modes  

    CAD Symbols and Models
    Download LMV1090 CAD Symbols
     Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LMV1090TLCMOS70213010015840003449464325
    LMV1090TLXCMOS70213010015840003449464325

    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 LMV1090.

    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 LMV1090 is located at RoHS Status.

    LMV108x/LMV109x Analog Noise-Suppression Technology
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    Audio Solutions for Portable Devices
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    LMV108x/LMV109x Analog Noise-Suppression Technology
    Date: 2008-04-24
    Length: 0:1:59
    Audio Solutions for Portable Devices
    Date: 2009-03-02
    Length: 00:50:38
    [Information as of 9-Feb-2012]