lmh0344

PRELIMINARYApril2007LMH03443GbpsHD/SDSDIAdaptiveCableEqualizerGeneralDescriptionTheLMH03443GbpsHD/SDSDIAdaptiveCableEqualizerisdesignedtoequalizedatatransmittedovercable(oranymediawithsimilardispersivelosscharacteristics).Theequal-izeroperatesoverawiderangeofdataratesfrom143Mbpsto2.97GbpsandsupportsSMPTE424M,SMPTE292M,SMPTE344M,andSMPTE259M.TheLMH0344implementsDCrestorationtocorrectlyhandlepathologicaldataconditions.Theequalizermaybedrivenineitherasingleendedordifferentialconfiguration.Additionalfeaturesincludeseparatecarrierdetectandoutputmutepinswhichmaybetiedtogethertomutetheoutputwhennosignalispresent.Aprogrammablemutereferenceispro-videdtomutetheoutputataselectablelevelofsignaldegra-dation.Features■SMPTE424M,SMPTE292M,SMPTE344M,andSMPTE259Mcompliant■SupportsDVB-ASIat270Mbps■Highdatarates:143Mbpsto2.97Gbps■Equalizesupto120metersofBelden1694Aat2.97Gbps,upto140metersofBelden1694Aat1.485Gbps,orupto350metersofBelden1694Aat270Mbps■Equalizes0-100mofBelden1694Aat2.97Gbpswith0.3UImaximumoutputjitter■Manualbypassandoutputmutewithaprogrammablethreshold■Single-endedordifferentialinput■50Ωdifferentialoutputs■Single3.3Vsupplyoperation■280mWtypicalpowerconsumptionwith3.3Vsupply■FootprintcompatiblewiththeLMH0044■ReplacestheGennumGS2974orGS2974AApplications■SMPTE424M,SMPTE292M,SMPTE344M,andSMPTE259Mserialdigitalinterfaces■Serialdigitaldataequalizationandreception■DatarecoveryequalizationTypicalApplication20199001©2007NationalSemiconductorCorporation201990(Note1)SupplyVoltage−0.5Vto3.6VInputVoltage(allinputs)−0.3VtoVCC+0.3VStorageTemperatureRange−65°Cto+150°CJunctionTemperature+150°CLeadTemperature(Soldering4Sec)+260°CPackageThermalResistance θJA16-pinLLP θJC16-pinLLP+43°C/W+8°C/WESDRating(HBM)8kVESDRating(MM)250VRecommendedOperatingConditionsSupplyVoltage(VCC–VEE)3.3V±5%InputCouplingCapacitance1.0µFAECCapacitor(ConnectedbetweenAEC+andAEC-)1.0µFOperatingFreeAirTemperature(TA)0°Cto+85°CDCElectricalCharacteristicsOverSupplyVoltageandOperatingTemperatureranges,unlessotherwisespecified(Notes2,3).SymbolParameterConditionsReferenceMinTypMaxUnitsVCMINInputCommonModeVoltageSDI,SDI1.9VVSDIInputVoltageSwingAtLMH0344input,(Notes4,5)720800950mVP−PVCMOUTOutputCommonModeVoltageSDO,SDOVCC–VSDO/2VVSDOOutputVoltageSwing50Ωload,differential750mVP-PMUTEREFDCVoltage(floating)MUTEREF1.3VMUTEREFRange0.7VCDOutputVoltageCarriernotpresentCD2.4VCarrierpresent0.4VMUTEInputVoltageMintomuteoutputsMUTE2.0VMaxtoforceoutputsactive0.8VICCSupplyCurrent85mA(Note3).SymbolParameterConditionsReferenceMinTypMaxUnitsBRSDIInputDataRateSDI,SDI1432970MbpsJitterforvariousCableLengths(withequalizerpathological)270Mbps,Belden1694A,0-350meters(Note4)0.2UI1.485Gbps,Belden1694A,0-140meters(Note4)0.25UI2.97Gbps,Belden1694A,0-100meters(Note4)0.3UI2.97Gbps,Belden1694A,100-120meters0.4UItr,tfOutputRiseTime,FallTime20%–80%,(Note4)SDO,SDO90130psMismatchinRise/FallTime(Note4)215pstOSOutputOvershoot(Note4)15%ROUTOutputResistancesingle-ended50ΩRLINInputReturnLoss5MHz-1.5GHz,(Note6)SDI,SDI15dB1.5GHz-3.0GHz,(Note6)10dBRINInputResistancesingle-ended1.3kΩCINInputCapacitancesingle-ended1pFNote1:AbsoluteMaximumRatingsarethoseparametervaluesbeyondwhichthelifeandoperationofthedevicecannotbeguaranteed.Thestatinghereinofthesemaximumsshallnotbeconstruedtoimplythatthedevicecanorshouldbeoperatedatorbeyondthesevalues.ThetableofElectricalCharacteristicsspecifiesacceptabledeviceoperatingconditions.Note2:Currentflowintodevicepinsisdefinedaspositive.Currentflowoutofdevicepinsisdefinedasnegative.AllvoltagesarestatedreferencedtoVEE=0Volts.Note3:TypicalvaluesarestatedforVCC=+3.3VandTA=+25°C.Note4:Specificationisguaranteedbycharacterization.Note5:Themaximuminputvoltageswingassumesanonstressing,DC-balancedsignal;specifically,theSMPTE-recommendedcolorbartestsignal.Pathologicalorotherstressingsignalsmaynotbeused.Thisspecificationisfor0mcableonly.Note6:Inputreturnlossisdependentonboarddesign.TheLMH0344meetsthisspecificationontheSD344evaluationboard.3(ground).2SDISerialdatatrueinput.3SDISerialdatacomplementinput.4VEENegativepowersupply(ground).5AEC+AECloopfilterexternalcapacitor(1µF)positiveconnection.6AEC-AECloopfilterexternalcapacitor(1µF)negativeconnection.7BYPASSBypassesequalizationandDCrestorationwhenhigh.Noequalizationoccursinthismode.8MUTEREFMutereference.SetsthethresholdforCDand(withCDtiedtoMUTE)determinesthemaximumcabletobeequalizedbeforemuting.MUTEREFmaybeunconnectedformaximumequalization.9VEENegativepowersupply(ground).10SDOSerialdatacomplementoutput.11SDOSerialdatatrueoutput.12VEENegativepowersupply(ground).13VCCPositivepowe