DS90LV027ALVDSDualHighSpeedDifferentialDriverAugust2005
DS90LV027A
LVDSDualHighSpeedDifferentialDriver
GeneralDescription
TheDS90LV027AisadualLVDSdriverdeviceoptimizedforhighdatarateandlowpowerapplications.Thedeviceisdesignedtosupportdataratesinexcessof600Mbps(300MHz)utilizingLowVoltageDifferentialSignaling(LVDS)technology.TheDS90LV027Aisacurrentmodedriveral-lowingpowerdissipationtoremainlowevenathighfre-quency.Inaddition,theshortcircuitfaultcurrentisalsominimized.
Thedeviceisina8-leadsmalloutlinepackage.TheDS90LV027Ahasaflow-throughdesignforeasyPCBlay-out.ThedifferentialdriveroutputsprovideslowEMIwithitstypicallowoutputswingof360mV.Itisperfectforhighspeedtransferofclockanddata.TheDS90LV027Acanbepairedwithitscompanionduallinereceiver,theDS90LV028A,orwithanyofNational\"sLVDSreceivers,toprovideahigh-speedpoint-to-pointLVDSinterface.
Features
nnnnnnnnnnnnn
>600Mbps(300MHz)switchingrates
0.3nstypicaldifferentialskew0.7nsmaximumdifferentialskew1.5nsmaximumpropagationdelay3.3Vpowersupplydesign±360mVdifferentialsignaling
Lowpowerdissipation(46mW@3.3Vstatic)Flow-throughdesignsimplifiesPCBlayoutInteroperablewithexisting5VLVDSdevices
PowerOffProtection(outputsinhighimpedance)ConformstoTIA/EIA-644Standard8-LeadSOICpackagesavesspaceIndustrialtemperatureoperatingrange(−40˚Cto+85˚C)
ConnectionDiagram
Dual-In-Line
10011401
OrderNumberDS90LV027ATMSeeNSPackageNumberM08A
FunctionalDiagram
10011402
10011403
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DS90LV027AAbsoluteMaximumRatings(Note1)
IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheNationalSemiconductorSalesOffice/Distributorsforavailabilityandspecifications.SupplyVoltage(VCC)InputVoltage(DI)OutputVoltage(DO±)MPackageDerateMPackageStorageTemperatureRangeLeadTemperatureRangeSoldering(4sec.)
+260˚C−0.3Vto+4V−0.3Vto+3.6V−0.3Vto+3.9V
1190mW
9.5mW/˚Cabove+25˚C
−65˚Cto+150˚C
ESDRatings
(HBM1.5kΩ,100pF)(EIAJ0Ω,200pF)(CDM)
(IECdirect330Ω,150pF)
≥8kV≥1000V≥1000V≥4kV
MaximumPackagePowerDissipation@+25˚C
RecommendedOperatingConditions
Min
SupplyVoltage(VCC)Temperature(TA)
3.0−40
Typ3.325
Max3.6+85
UnitsV˚C
ElectricalCharacteristics
OverSupplyVoltageandOperatingTemperatureranges,unlessotherwisespecified.(Notes2,3,7)SymbolVOD∆VODVOHVOLVOS∆VOSIOXDIOSDVIHVILIIHIILVCLICCParameter
OutputDifferentialVoltageVODMagnitudeChangeOutputHighVoltageOutputLowVoltageOffsetVoltage
OffsetMagnitudeChangePower-offLeakage
OutputShortCircuitCurrentInputHighVoltageInputLowVoltageInputHighCurrentInputLowCurrentInputClampVoltagePowerSupplyCurrent
VIN=3.3Vor2.4VVIN=GNDor0.5VICL=−18mANoLoadRL=100Ω
VIN=VCCorGND
VCC−1.5
DI
2.0GND
VOUT=VCCorGND,VCC=0V
0.91.1250
RL=100Ω(Figure1)
Conditions
PinDO+,DO−
Min250
Typ36011.41.11.23
1.37525Max450351.6
UnitsmVmVVVVmVµAmAVVµAµAV
1420
mAmA
DIFFERENTIALDRIVERCHARACTERISTICS
±1
−5.7
±10
−8VCC0.8
±2±1
−0.6814
±10±10
SwitchingCharacteristics
OverSupplyVoltageandOperatingTemperatureRanges,unlessotherwisespecified.(Notes3,4,5,6)SymboltPHLDtPLHDtSKD1tSKD2tSKD3tSKD4tTLHtTHLfMAXParameter
DifferentialPropagationDelayHightoLowDifferentialPropagationDelayLowtoHighDifferentialPulseSkew|tPHLD−tPLHD|(Note8)ChanneltoChannelSkew(Note9)DifferentialParttoPartSkew(Note10)DifferentialParttoPartSkew(Note11)TransitionLowtoHighTimeTransitionHightoLowTime
MaximumOperatingFrequency(Note12)
Conditions
RL=100Ω,CL=15pF(Figure2andFigure3)
Min0.30.300000.20.2
0.50.5350Typ0.81.10.30.4
Max1.51.50.70.81.01.21.01.0
UnitsnsnsnsnsnsnsnsnsMHz
DIFFERENTIALDRIVERCHARACTERISTICS
Note1:“AbsoluteMaximumRatings”arethosevaluesbeyondwhichthesafetyofthedevicecannotbeguaranteed.Theyarenotmeanttoimplythatthedevicesshouldbeoperatedattheselimits.Thetableof“ElectricalCharacteristics”specifiesconditionsofdeviceoperation.
Note2:Currentintodevicepinsisdefinedaspositive.Currentoutofdevicepinsisdefinedasnegative.AllvoltagesarereferencedtogroundexceptVOD.Note3:Alltypicalsaregivenfor:VCC=+3.3VandTA=+25˚C.
Note4:Theseparametersareguaranteedbydesign.ThelimitsarebasedonstatisticalanalysisofthedeviceoverPVT(process,voltage,temperature)ranges.Note5:CLincludesprobeandfixturecapacitance.
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DS90LV027ASwitchingCharacteristics
(Continued)
Note6:Generatorwaveformforalltestsunlessotherwisespecified:f=1MHz,ZO=50Ω,tr≤1ns,tf≤1ns(10%-90%).
Note7:TheDS90LV027Aisacurrentmodedeviceandonlyfunctionwithdatasheetspecificationwhenaresistiveloadisappliedtothedriversoutputs.Note8:tSKD1,|tPHLD−tPLHD|,isthemagnitudedifferenceindifferentialpropagationdelaytimebetweenthepositivegoingedgeandthenegativegoingedgeofthesamechannel.
Note9:tSKD2istheDifferentialChanneltoChannelSkewofanyeventonthesamedevice.
Note10:tSKD3,DifferentialParttoPartSkew,isdefinedasthedifferencebetweentheminimumandmaximumspecifieddifferentialpropagationdelays.ThisspecificationappliestodevicesatthesameVCCandwithin5˚Cofeachotherwithintheoperatingtemperaturerange.
Note11:tSKD4,parttopartskew,isthedifferentialchanneltochannelskewofanyeventbetweendevices.Thisspecificationappliestodevicesoverrecommendedoperatingtemperatureandvoltageranges,andacrossprocessdistribution.tSKD4isdefinedas|Max−Min|differentialpropagationdelay.
Note12:fMAXgeneratorinputconditions:tr=tf<1ns(0%to100%),50%dutycycle,0Vto3V.Outputcriteria:dutycycle=45%/55%,VOD>250mV,allchannelsswitching.
ParameterMeasurementInformation
10011404
FIGURE1.DifferentialDriverDCTestCircuit
10011405
FIGURE2.DifferentialDriverPropagationDelayandTransitionTimeTestCircuit
10011406
FIGURE3.DifferentialDriverPropagationDelayandTransitionTimeWaveforms
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DS90LV027AApplicationInformation
TABLE1.DevicePinDescriptions
Pin#2,36,75,841
NameDIDO+DO−GNDVCCDescription
TTL/CMOSdriverinputpinsNon-invertingdriveroutputpinInvertingdriveroutputpinGroundpin
Positivepowersupplypin,+3.3V±0.3V
TypicalPerformanceCurves
OutputHighVoltagevsPowerSupplyVoltage
OutputLowVoltagevsPowerSupplyVoltage
1001140710011408
OutputShortCircuitCurrentvs
PowerSupplyVoltageDifferentialOutputVoltagevsPowerSupplyVoltage
10011409
10011410
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DS90LV027ATypicalPerformanceCurves
DifferentialOutputVoltage
vsLoadResistor
(Continued)
OffsetVoltagevsPowerSupplyVoltage
1001141110011412
PowerSupplyCurrent
vsFrequencyPowerSupplyCurrentvsPowerSupplyVoltage
10011413
10011414
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DS90LV027ATypicalPerformanceCurves
PowerSupplyCurrentvsAmbientTemperature
(Continued)
DifferentialPropagationDelayvs
PowerSupplyVoltage
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10011416
DifferentialPropagationDelayvs
AmbientTemperatureDifferentialSkewvsPowerSupplyVoltage
10011418
10011417
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DS90LV027ATypicalPerformanceCurves
DifferentialSkewvsAmbientTemperature
(Continued)
TransitionTimevsPowerSupplyVoltage
1001141910011420
TransitionTimevsAmbientTemperature
10011421
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DS90LV027ALVDSDualHighSpeedDifferentialDriverPhysicalDimensions
inches(millimeters)unlessotherwisenoted
OrderNumberDS90LV027ATMNSPackageNumberM08A
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