Texas Instruments LMH2190 Handleiding

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LMH2190

www.ti.com

SNAS473H–JUNE2009–REVISEDMAY2013

LMH2190QuadChannel27MHzClockTreeDriverwithI

2

CInterface

CheckforSamples:LMH2190

1

FEATURES

DESCRIPTION

TheLMH2190isaquadchannelconfigurableclock

2

•1InputClock,4OutputClocks

treedriverwhichsuppliesadigitalsystemclockto

•SupportsbothSquareorSineWaveInput

peripheralsinmobilehandsetsorotherapplications.

•1.8VSquareWaveClockOutputs

Itprovidesasolutiontoclockingissuessuchas

limiteddrivecapabilityforfanoutorlongertraces,

•SkewedClockOutputs

protectionofthemasterclockfromvaryingloadsand

•IndependentClockRequest

frequencypullingeffects,isolationbufferingfrom

•HighIsolationofSupplyNoisetoClockInput

noisymodules,andcrosstalkisolation.Ithasverylow

phasenoisewhichenablesittodrivesensitive

•HighOutputtoOutputIsolation

modulessuchasWirelessLANandBluetooth.

•OutputDriveupto50pF

TheLMH2190canbeclockedupto27MHz,andhas

•EMIControlledOutputEdgesandEMIFiltering

anindependentclockrequestpinforeachclock

•Integrated1.8VLow-DropoutRegulator

outputwhichallowstheperipheraltocontrolthe

–LowOutputNoiseVoltage

clock.ItfeaturesanintegratedLDOwhichprovides

anultralownoisevoltagesupplywith10mAexternal

–10mAloadCurrent

loadcurrentwhichcanbeusedtosupplytheTCXO

•I

2

CConfigurableupto400kHz(FastMode)

orotherclocksource.

•UltraLowStandbyCurrent

TheI

2

Cserialinterfacecanbeusedtooverridethe

•V

BAT

Range=2.5Vto5.5V

defaultconfigurationofthedevicetooptimizethe

LMH2190fortheapplication.Someofthese

APPLICATIONS

programmablefeaturesincludesettingthepolarityof

boththeclockandtheclockrequestinputs.In

•MobileHandsets

addition,theclockoutputshaveprogrammableoutput

•PDAs

drivecurrenttooptimizefortheconnectedload.EMI

•PortableEquipment

switchingnoisecanbecontrolledbyconfiguring

outputdriveandskewsettings.

TheLMH2190quadclockdistributorisofferedina

tiny1.61mmx1.61mm16bumpDSBGApackage.Its

smallsizeandlowsupplycurrentmakeitidealfor

portableapplications.

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2009–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties