Texas Instruments LMV1031 Handleiding

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V

IN

V

OUT

1x

GAIN

V

DC

V

DD

GND

GND

DIAPHRAGM

AIRGAP

BACKPLATE

ELECTRET

CONNECTOR

LMV1031

x

x

x

x

x

x

x

x

xxx

x

xx

x

IC

V

CC

V

OUT

LMV1031

www.ti.com

SNOSAP8B–SEPTEMBER2005–REVISEDMAY2013

LMV1031-20AmplifierforInternal3-WireAnalogMicrophonesandExternalPreamplifier

CheckforSamples:LMV1031

1

FEATURES

DESCRIPTION

TheLMV1031audioamplifierisanidealreplacement

2

•(TypicalLMV1031-20,2VSupply;Unless

fortheJFETpreamplifierthatiscurrentlyusedinthe

OtherwiseNoted)

electretmicrophones.TheLMV1031isoptimizedfor

•SignaltoNoiseRatio62dB

applicationsthatrequireextendedbatterylife,such

•OutputVoltageNoise(A-Weighted)−86dBV

asBluetoothcommunicationlinks.Thesupplycurrent

fortheLMV1031isonly72μA.Thisisadramatic

•LowSupplyCurrent72μA

reductionfromthatrequiredforaJFETequipped

•SupplyVoltage2Vto5V

microphone.TheLMV1031,withitsseparateoutput

•InputImpedance>100MΩ

andsupplypins,offersahigherPSRRandeliminates

theneedforadditionalexternalcomponents.

•MaxInputSignal108mV

PP

•OutputVoltage1.09V

TheLMV1031isensuredtooperatefrom2Vto5V

supplyvoltageoverthefulltemperaturerange,hasa

•TemperatureRange−40°Cto85°C

fixedvoltagegainof20dBandenhancedSNR

•LargeDome4-BumpDSBGAPackagewith

performance.TheLMV1031isoptimizedforan

ImprovedAdhesionTechnology

outputbiasingof1.09V.

TheLMV1031haslessthan200Ωofoutput

APPLICATIONS

impedanceoverthefullaudiobandwidth.Thegain

•MobileCommunications-Bluetooth

responseoftheLMV1031isflatwithintheaudioband

andisstableoverthetemperaturerange.

•AccessoryMicrophoneProducts

•CellularPhones

TheLMV1031isavailableinalargedome4-bump

ultrathinDSBGApackagethatcaneasilyfitonthe

•PDAs

PCBinsidetheminiaturemicrophonemetalcan

(package).Thispackageisdesignedformicrophone

PCBsrequiring1kgadhesioncriteria.

BlockDiagramElectretMicrophone

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2005–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties