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LMV1091

www.ti.com

SNAS481C–OCTOBER2009–REVISEDMAY2013

LMV1091DualInput,FarFieldNoiseSuppressionMicrophoneAmplifier

CheckforSamples:LMV1091

1

FEATURES

DESCRIPTION

TheLMV1091isafullyanalogdualdifferentialinput,

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•NoLossofVoiceIntelligibility

differentialoutput,microphonearrayamplifier

•LowPowerConsumption

designedtoreducebackgroundacousticnoise,while

•ShutdownFunction

deliveringsuperbspeechclarityinvoice

communicationapplications.

•NoaddedProcessingDelay

•DifferentialOutputs

TheLMV1091preservesnear-fieldvoicesignals

within4cmofthemicrophoneswhilerejectingfar-field

•Adjustable12-54dBGain

acousticnoisegreaterthan50cmfromthe

•ExcellentRFImmunity

microphones.Upto20dBoffar-fieldrejectionis

•Availableina25–BumpDSBGAPackage

possibleinaproperlyconfiguredandusing±0.5dB

matchedmicropohones.

APPLICATIONS

PartofthePowerwise™familyofenergyefficient

•MobileHeadset

solutions,theLMV1091consumesonly600μAof

supplycurrentprovidingsuperiorperformanceover

•MobileandHandheldTwo-wayRadios

DSPsolutionsconsuminggreaterthantentimesthe

•BluetoothandOtherPoweredHeadsets

power.

•Hand-heldVoiceMicrophones

Thedualmicrophoneinputsandtheprocessedsignal

outputaredifferentialtoprovideexcellentnoise

KEYSPECIFICATIONS

immunity.Themicrophonesarebiasedwithan

internallow-noisebiassupply.

•FarFieldNoiseSuppressionElectrical(FFNS

E

atf=1kHz):34dB(typ)

•SNRI

E

:26dB(typ)

•SupplyVoltage:2.7Vto5.5V

•SupplyCurrent:600μA(typ)

•StandbyCurrent:0.1μA(typ)

•Signal-to-NoiseRatio(Voiceband):65dB(typ)

•TotalHarmonicDistortion+Noise:0.1%(typ)

•PSRR(217Hz):99dB(typ)

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Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2009–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Produktspecifikationer