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
| Merk: | Texas Instruments |
| Categorie: | Niet gecategoriseerd |
| Model: | LMH2190 |
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