ACCurrentProbesDatasheetCT1•CT2•CT6电流探头Features&BenefitsHighBandwidthUltra-lowInductanceVery***allFormFactorCharacterizeCurrentW***eformsupto<200psRiseTimesVeryLowLoadingofCircuitUnderTestFitsIntoDense,Closely-spacedCircuitDesignsApplicati***DataStorageReadChannelDesignSiliconCharacterizationHigh-frequencyAnalogDesignESDTestingSignalInjectionDifferentialCurrentMeasurementsSingle-shotLowRep-ratePulseMeasurementsPropagationDelayMeasurementCT6CurrentProbeTheCT6isthenewestadditiontotheTektronixportfolioofhigh-frequencycurrentprobes.Itisdesignedtomeettheneedsofhigh-speedcircuitdesignandtestapplicati***whichrequireultra-highbandwidth,lowinductance,andextremely***allformfactor.TheCT6providesupto2GHzbandwidthwhenusedwithhigh-bandwidthoscilloscopessuchastheTektronixTDS694C,TDS794D,andTDS7000Seriesoscilloscopesorwithothercompatible50Ωinputmeasuringinstruments.Lowinductance(<3nH)assuresthattheloadingeffectoftheCT6onthecircuit-under-testwillbenegligible,whichisespeciallyimportantfortoday'slow-amplitude,high-speedcircuitdesignssuchasdiskdriveread/writepreamplifiers.Theprobeisaclosed-circuitdesignwhichwillacceptuninsulatedwiresizedupto20gauge.ThisproductisexemptfromCEmarkbyvirtueofits30Vvoltagelimit.CT1/CT2CurrentProbesTheCT1andCT2CurrentProbesaredesignedforpermanentorsemi-permanentin-circuitinstallation.Eachprobec***istsofacurrenttransformerandaninterconnectingcable.Thecurrenttransformersh***ea***allholethroughwhichacurrentcarryingconductorispassedduringcircuitassembly.TheP6041ProbeCableprovidestheconnectionbetweentheCT1andCT2CurrentTransformersandaBNCoscilloscopeinput.A50Ωterminationisrequiredtoterminatethecablewhenconnectedtoahigh-impedance(1MΩ)oscilloscopeinput.Oneprobecablecanbeusedtomonitorseveralcurrenttransformersthath***ebeenwiredintoacircuit.CT1/CT2.CurrentProbeswithP6041BNCProbeCable.MiniatureC***tructionTheCT1andCT2detachablecabledesignenablesoneormoreprobestobelocatedoncircuitboa***orinotherlimitedspaceareas.TheCT6offersthe***allestformfactor***ailable,formeasurementonever-shrinkingcircuitboa***andcomponents.Itisdesignedfortemporaryinstallationanddoesnotincorporateremovablecables,astheCT1andCT2do.ExtendibleProbeLengthSpecifiedrisetimeandbandwidthareobtainedwhenusingtheprobecablesprovided:TheP6041cableusedwiththeCT1andCT2is42inchesnominal.Ifadditionallengthisrequired,thecablescanbeextendedbyusinghigh-quality50Ωcableandsuitableinterfaceconnectors.(AlsoseeSpecialProbeCables,OptionalAccessories.)Longcablesmaydegradehigh-frequencyresp***e.HighSensitivityTheCT1andCT6provideanoutputof5mVforeachmilliampofinputcurrentwhenterminatedin50Ω.TheCT2provides1mVpermilliampwhenterminatedin50Ω.TypicalSystemsTheCT1,CT2,andCT6high-frequencycurrenttransformersaredynamic(i.e.,non-DC)currentmeasuringdevices.Theyaretypicallyusedinconjunctionwithcompatiblehigh-bandwidthoscilloscopesandotherinstrumentstoobserveand/orrecordhigh-frequencycurrentw***eforms.TheCT1,CT2,andCT6normallyoperatedirectlyinto50Ωscopesandothermeasuringdeviceinputs.TheCT1orCT2canbeusedwith1MΩinputsystems;usetheP6041probecableandterminatetheoutputwitha50Ωfeed-throughtermination(seeOptionalAccessories).Inallcases,theCT1,CT2,andCT6mustworkinto50Ωstoobtainspecifiedperformanceandsensitivity.TypicalMeasurementApplicati***DifferentialCurrentMeasurementsMosttrue-differentialvoltageamplifiersh***eamaximumbandwidthofabout100MHz.TheCT1orCT6canmakedifferentialcurrentmeasurementsto1GHzand2GHz,respectively,bypassingtwowirescarryingopposingcurrentsthroughthesamecore.Thedisplayedresultisthedifferencecurrent.TheCT2canperformthesamefunctionto200MHz.Inallcases,DeratingwithFrequencyandAmp-secondProduct(Current-timeProduct)guidelinesshouldnotbeexceeded.(SeeCharacteristics.)Single-shotandLowRep-ratePulseMeasurementsThesecommonmeasurementsareeasytomakewiththeCT1,CT2,orCT6providedthatyoursignalfitswithintheMaxPulseCurrentandAmp-secondProduct(Current-timeProduct)guidelinesforthespecificcurrentprobecharacteristics.Forexample,theCT2isratedat36Apeak,withanAmp-secondProductof50×10-6seconds(50Amp-microseconds),thereforetheCT2cansafelyhandlea36Apeakpulsewithamaximumwidthof1.39microsecondsorloweramplitudepulsesforlongerpulsewidths.TheCT1,CT2,andCT6allh***elow-frequencyroll-offcharacteristics.Low-frequency"droop"willexhibititselfwhenthepulsewidthapproachestheL/Rtimec***tantofthespecifictransformer.PropagationDelayMeasurementsTwoCT1orCT2CurrentTransformerswithmatchingprobecablescanbeusedtomeasurepropagationdelay(transittime)betweentheinputandoutputcurrentsofhigh-frequencydevices.Theprobeoutputsareconnectedtotheinputsofdual-channelreal-timeorsamplingscopes.VerificationofanyProbe/Cable/ScopeSystemmi***atchcanbeobtainedbypassingthesamesignalcurrentthroughbothprobesandobservingtotalsystemdelaydifference,ifany.CharacteristicsCT1TypicalFrequencyResp***e.CT2TypicalFrequencyResp***e.CT6TypicalFrequencyResp***e.CT1,CT2,andCT6CharacteristicsCharacteristicCT1CT2CT6Bandwidth(typical)25kHzto1GHz1.2kHzto200MHz250kHzto2GHzRiseTime350ps500ps200psSensitivity(into50Ω)5mV/mA1mV/mA5mV/mAAccuracy&plu***n;3%&plu***n;3%&plu***n;3%MagnetizingInductance6μH7μH1μHLeakageInductance2.4nH1nH1.5nHInsertionImpedance:at10MHz<1Ω0.1Ω1.1Ωat100MHz2Ω0.5Ω1.3Ωat1GHz11.9ΩMax.BareWireSize#14wire#16wire#20wire1.78mm(0.070in.)1.32mm(0.052in.)0.8mm(0.032in.)Max.BareWireVoltage:RMS175VRMSCATI175VRMSCATI30VRMSCATIPeak1000V*11000V*130VDC175V175V30VMax.PeakPulseCurrent12A36A6AMax.ContinuousCurrent(RMS)450mA2.5A120mAAmp-secondProduct1×10-6A*Sec50×10-6A*Sec0.25×10-6A*SecL/RTimeC***tant(droop)>6.35μs>160μs0.4μsPropagationDelay5.4ns6.1ns5.2nsSafetyUL3111-2-032,CSA1010.2.032,EN61010-2-032,IEC61010-2-032UL3111-2-032,CSA1010.2.032,EN61010-2-032,IEC61010-2-032NA*1(<3.25%DutyFactor).)