serieswww.568.com

LMC568www.
ti.
comSNAS559B–MAY1999–REVISEDAPRIL2013LMC568LowPowerPhase-LockedLoopCheckforSamples:LMC5681FEATURESDESCRIPTIONTheLMC568isanamplitude-linearphase-locked2Demodulates±15%DeviationFM/FSKSignalsloopconsistingofalinearVCO,fullybalancedphaseCarrierDetectOutputwithHysteresisdetectors,andacarrierdetectoutput.
LMCMOSOperationto500kHzInputFrequencytechnologyisemployedforhighperformancewithlowpowerconsumption.
LowTHD—0.
5%Typ.
for±10%Deviation2Vto9VSupplyVoltageRangeTheVCOhasalinearizedcontrolrangeof±30%toallowdemodulationofFMandFSKsignals.
CarrierLowSupplyCurrentDraindetectisindicatedwhenthePLLislockedtoaninputsignalgreaterthan26mVrms.
LMC568applicationsincludeFMSCAandTVsecondaudioprogramdecoders,FSKdatademodulators,andvoicepagers.
TypicalApplication(100kHzinputfrequency,refertoNotestoTypicalApplication)Figure1.
8-PinSOICorPDIPSeeDorPPackage1Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2Alltrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.
Copyright1999–2013,TexasInstrumentsIncorporatedProductsconformtospecificationsperthetermsoftheTexasInstrumentsstandardwarranty.
Productionprocessingdoesnotnecessarilyincludetestingofallparameters.
LMC568SNAS559B–MAY1999–REVISEDAPRIL2013www.
ti.
comThesedeviceshavelimitedbuilt-inESDprotection.
TheleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoamduringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates.
AbsoluteMaximumRatings(1)(2)InputVoltage,Pin32Vp–pSupplyVoltage,Pin410VOutputVoltage,Pin813VVoltageatAllOtherPinsVstoGndOutputCurrent,Pin830mAPackageDissipation500mWOperatingTemperatureRange(TA)25°Cto+125°CStorageTemperatureRange55°Cto+150°CSolderingInformationPDIPPackageSoldering(10seconds)260°CSOICPackageVaporPhase(60seconds)215°CInfrared(15seconds)220°C(1)"AbsoluteMaximumRatings"indicatelimitsbeyondwhichdamagetothedevicemayoccur.
OperatingRatingsindicateconditionsforwhichthedeviceisfunctional,butdonotensurespecificperformancelimits.
(2)IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheTexasInstrumentsSalesOffice/Distributorsforavailabilityandspecifications.
ElectricalCharacteristicsTestCircuit,TA=25°C,VS=5V,RtCt#2,Sw.
1Pos.
0;andnoinputunlessotherwisenoted.
SymbolParameterConditionsMinTypMaxUnitsI4PowerSupplyCurrentRtCt#1,QuiescentorActivatedVS=2V0.
35VS=5V0.
751.
5mAdcVS=9V1.
22.
4V3InputD.
C.
Bias0mVdcR3InputResistance40kI8OutputLeakage1100nAdcf0CenterFrequencyFosc÷2RtCt#2,MeasureOscillatorFrequencyandVS=2V98Divideby2VS=5V90103115kHzVS=9V105Δf0CenterFrequencyShiftwithSupply1.
02.
0%/VVinInputThresholdVS=2V81625SetInputFrequencyEqualtof0MeasuredAbove,IncreaseInputLeveluntilPin8GoesVS=5V152642mVrmsLow.
VS=9V45ΔVinInputHysteresisStartingatInputThreshold,DecreaseInputLeveluntilPin1.
5mVrms8GoesHighV8Output"Sat"VoltageI8=2mA0.
060.
15InputLevel>ThresholdChooseRLforVdcSpecifiedI8I8=20mA0.
7L.
D.
B.
W.
LargestDetectionMeasureFoscwithSw.
1inPos.
0,1,and2;VS=2V30BandwidthVS=5V4055%VS=9V60ΔBWBandwidthSkew1±5%VoutRecoveredAudioVS=2V170TypicalApplicationCircuitInput=100mVrms,F=100kHzVS=5V270mVrmsFmod=400Hz,±10kHzDev.
VS=9V4002SubmitDocumentationFeedbackCopyright1999–2013,TexasInstrumentsIncorporatedProductFolderLinks:LMC568LMC568www.
ti.
comSNAS559B–MAY1999–REVISEDAPRIL2013ElectricalCharacteristics(continued)TestCircuit,TA=25°C,VS=5V,RtCt#2,Sw.
1Pos.
0;andnoinputunlessotherwisenoted.
SymbolParameterConditionsMinTypMaxUnitsTHDTotalHarmonicDistortionTypicalApplicationCircuitasAbove,MeasureVout0.
5%Distortion.
SignaltoNoiseRatioTypicalApplicationCircuitRemoveModulation,MeasureVn65dB(S+N)/N=20log(Vout/Vn).
fmaxHighestCenterFreq.
RtCt#3,MeasureOscillatorFrequencyandDivideby2700kHzTestCircuitRtCtRtCt#1100k300pF#210k300pF#35.
1k62pFCopyright1999–2013,TexasInstrumentsIncorporatedSubmitDocumentationFeedback3ProductFolderLinks:LMC568LMC568SNAS559B–MAY1999–REVISEDAPRIL2013www.
ti.
comNotestoTypicalApplicationSUPPLYDECOUPLINGThedecouplingofsupplypin4becomesmorecriticalathighsupplyvoltageswithhighoperatingfrequencies,requiringC4tobeplacedasclosetopossibletopin4.
Also,duetopinvoltagestrackingsupply,alargeC4isnecessaryforlowfrequencyPSRR.
OSCILLATORTIMINGCOMPONENTSThevoltage-controlledoscillator(VCO)ontheLMC568mustbesetuptorunattwicethefrequencyoftheinputsignal.
ThecomponentsshowninthetypicalapplicationareforFosc=200kHz(100kHzinputfrequency).
Foroperationatlowerfrequencies,increasethecapacitorvalue;forhigherfrequenciesproportionallyreducetheresistorvalues.
Iflowdistortionisnotarequirement,theseriesdiode/resistorbetweenpins6and5maybeomitted.
ThiswillreduceVCOsupplydependenceandincreaseVoutbyapproximately2dBwithTHD=2%typical.
ThecenterfrequencyasafunctionofRtandCtisgivenby:(1)ToallowforI.
C.
andcomponentvaluetolerences,theoscillatortimingcomponentswillrequireatrim.
ThisisgenerallyaccomplishedbyusingavariableresistoraspartofRt,althoughCtcouldalsobepadded.
TheamountofinitialfrequencyvariationduetotheLMC568itselfisgivenintheelectricalspecifications;thetotaltrimrangemustalsoaccommodatethetolerancesofRtandCt.
INPUTPINTheinputpin3isinternallyground-referencedwithanominal40kΩresistor.
Signalsthatarecenteredon0Vmaybedirectlycoupledtopin3;however,anyd.
c.
potentialmustbeisolatedviaC3.
OUTPUTTAKEOFFTheoutputsignalistakenofftheloopfilteratpin2.
Pin2isthecombinedoutputofthephasedetectorandcontrolinputoftheVCOforthephase-lockedloop(PLL).
Thenominalpin2sourceresistanceis80kΩ,requiringtheuseofanexternalbuffertransistortodrivenominalloads.
ForsmallvaluesofC2,thePLLwillhaveafastacquisitiontimeandthepull-inrangewillbesetbythebuilt-inVCOfrequencystops,whichalsodeterminethelargestdetectionbandwidth(LDBW).
IncreasingC2resultsinimprovednoiseimmunityattheexpenseofacquisitiontime,andthepull-inrangewillbecomenarrowerthantheLDBW.
However,themaximumhold-inrangewillalwaysequaltheLDBW.
The2kHzde-emphasispoleshownmaybemodifiedoromittedasrequiredbytheapplication.
CARRIERDETECTPin1istheoutputofanegative-goingamplitudedetectorwhichhasanominal0signaloutputof7/9Vs.
Theoutputatpin8isanN-channelFETswitchtogroundwhichisactivatedwhenthePLLislockedandtheinputisofsufficientamplitudetocausepin1tofallbelow2/3Vs.
Thecarrierdetectthresholdisinternallysetto26mVrmstypicalona5Vsupply.
CapacitorC1inconjunctionwiththenominal40kΩpin1internalresistanceformstheoutputfilter.
ThesizeofC1isatradeoffbetweenslewrateandcarrierrippleattheoutputcomparator.
OptionalresistorRHincreasesthehysteresisinthepin8outputforapplicationssuchasaudiomutecontrol.
TheminimumallowablevalueforRHis330kΩ.
4SubmitDocumentationFeedbackCopyright1999–2013,TexasInstrumentsIncorporatedProductFolderLinks:LMC568LMC568www.
ti.
comSNAS559B–MAY1999–REVISEDAPRIL2013LMC568TypicalPerformanceCharacteristicsFrequencyDriftwithTemperaturePeakDeviationvsInputSignalLevelFigure2.
Figure3.
Pull-InRangeasaFunctionofC2Figure4.
Copyright1999–2013,TexasInstrumentsIncorporatedSubmitDocumentationFeedback5ProductFolderLinks:LMC568LMC568SNAS559B–MAY1999–REVISEDAPRIL2013www.
ti.
comREVISIONHISTORYChangesfromRevisionA(April2013)toRevisionBPageChangedlayoutofNationalDataSheettoTIformat56SubmitDocumentationFeedbackCopyright1999–2013,TexasInstrumentsIncorporatedProductFolderLinks:LMC568PACKAGEOPTIONADDENDUMwww.
ti.
com7-Nov-2017Addendum-Page1PACKAGINGINFORMATIONOrderableDeviceStatus(1)PackageTypePackageDrawingPinsPackageQtyEcoPlan(2)Lead/BallFinish(6)MSLPeakTemp(3)OpTemp(°C)DeviceMarking(4/5)SamplesLMC568CMX/NOPBLIFEBUYSOICD82500Green(RoHS&noSb/Br)CUSNLevel-1-260C-UNLIM0to0LMC568CM(1)Themarketingstatusvaluesaredefinedasfollows:ACTIVE:Productdevicerecommendedfornewdesigns.
LIFEBUY:TIhasannouncedthatthedevicewillbediscontinued,andalifetime-buyperiodisineffect.
NRND:Notrecommendedfornewdesigns.
Deviceisinproductiontosupportexistingcustomers,butTIdoesnotrecommendusingthispartinanewdesign.
PREVIEW:Devicehasbeenannouncedbutisnotinproduction.
Samplesmayormaynotbeavailable.
OBSOLETE:TIhasdiscontinuedtheproductionofthedevice.
(2)RoHS:TIdefines"RoHS"tomeansemiconductorproductsthatarecompliantwiththecurrentEURoHSrequirementsforall10RoHSsubstances,includingtherequirementthatRoHSsubstancedonotexceed0.
1%byweightinhomogeneousmaterials.
Wheredesignedtobesolderedathightemperatures,"RoHS"productsaresuitableforuseinspecifiedlead-freeprocesses.
TImayreferencethesetypesofproductsas"Pb-Free".
RoHSExempt:TIdefines"RoHSExempt"tomeanproductsthatcontainleadbutarecompliantwithEURoHSpursuanttoaspecificEURoHSexemption.
Green:TIdefines"Green"tomeanthecontentofChlorine(Cl)andBromine(Br)basedflameretardantsmeetJS709Blowhalogenrequirementsof<=1000ppmthreshold.
Antimonytrioxidebasedflameretardantsmustalsomeetthe<=1000ppmthresholdrequirement.
(3)MSL,PeakTemp.
-TheMoistureSensitivityLevelratingaccordingtotheJEDECindustrystandardclassifications,andpeaksoldertemperature.
(4)Theremaybeadditionalmarking,whichrelatestothelogo,thelottracecodeinformation,ortheenvironmentalcategoryonthedevice.
(5)MultipleDeviceMarkingswillbeinsideparentheses.
OnlyoneDeviceMarkingcontainedinparenthesesandseparatedbya"~"willappearonadevice.
IfalineisindentedthenitisacontinuationofthepreviouslineandthetwocombinedrepresenttheentireDeviceMarkingforthatdevice.
(6)Lead/BallFinish-OrderableDevicesmayhavemultiplematerialfinishoptions.
Finishoptionsareseparatedbyaverticalruledline.
Lead/BallFinishvaluesmaywraptotwolinesifthefinishvalueexceedsthemaximumcolumnwidth.
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TAPEANDREELINFORMATION*AlldimensionsarenominalDevicePackageTypePackageDrawingPinsSPQReelDiameter(mm)ReelWidthW1(mm)A0(mm)B0(mm)K0(mm)P1(mm)W(mm)Pin1QuadrantLMC568CMX/NOPBSOICD82500330.
012.
46.
55.
42.
08.
012.
0Q1PACKAGEMATERIALSINFORMATIONwww.
ti.
com4-May-2017PackMaterials-Page1*AlldimensionsarenominalDevicePackageTypePackageDrawingPinsSPQLength(mm)Width(mm)Height(mm)LMC568CMX/NOPBSOICD82500367.
0367.
035.
0PACKAGEMATERIALSINFORMATIONwww.
ti.
com4-May-2017PackMaterials-Page2IMPORTANTNOTICETexasInstrumentsIncorporated(TI)reservestherighttomakecorrections,enhancements,improvementsandotherchangestoitssemiconductorproductsandservicesperJESD46,latestissue,andtodiscontinueanyproductorserviceperJESD48,latestissue.
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MailingAddress:TexasInstruments,PostOfficeBox655303,Dallas,Texas75265Copyright2017,TexasInstrumentsIncorporatedMouserElectronicsAuthorizedDistributorClicktoViewPricing,Inventory,Delivery&LifecycleInformation:TexasInstruments:LMC568CMLMC568CM/NOPBLMC568CMXLMC568CMX/NOPB