LMX2346TMNOPB;LMX2347TMNOPB;LMX2346SLBXNOPB;LMX2347SLBXNOPB;中文规格书,Datasheet资料

LMX2346/LMX2347 PLLatinum Frequency Synthesizer for RF Personal CommunicationsLMX2346󰀀2.0 GHzLMX2347󰀀2.5 GHz

Literature Number: SNAS162E

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LMX2346/LMX2347

PLLatinum™FrequencySynthesizerforRFPersonalCommunicationsLMX23462.0GHzLMX23472.5GHz

GeneralDescription

TheLMX2346/7arehighperformancefrequencysynthesiz-erswithanintegrated32/33dualmodulusprescaler.TheLMX2346isdesignedforRFoperationupto2.0GHz.TheLMX2347isdesignedforRFoperationupto2.5GHz.Usingaproprietarydigitalphaselockedlooptechnique,theLMX2346/7generatesverystable,lownoisecontrolsignalsforUHFandVHFvoltagecontrolledoscillators.

SerialdataistransferredintotheLMX2346/7viaathree-lineMICROWIREinterface(DATA,LE,CLOCK).Supplyvoltagerangeisfrom2.7Vto5.5V.Thechargepumpprovides4mAoutputcurrent.

TheLMX2346/7aremanufacturedusingNational’s0.5µABiCVsiliconBiCMOSprocessandisavailablein16-pinTSSOPand16-pinCSPpackages.

Features

nnnnnnn

RFoperationupto2.5GHz2.7Vto5.5Voperation

Digital&AnalogLockDetect32/33DualmodulusprescalerExcellentPhaseNoise

Internalbalanced,lowleakagechargepumpPinCompatibletoLMX2323

Applications

nCellularDCS/PCS/3GinfrastructureequipmentnWirelessLocalAreaNetworks(WLANs)nOtherwirelesscommunicationsystems

FunctionalBlockDiagram

20038406

PLLatinum™isatrademarkofNationalSemiconductorCorporation.

©2004NationalSemiconductorCorporationDS200384www.national.com

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LMX2346/L20038401

16-PinTSSOPPackageNSPackageNumberMTC16

20038407

16-PinChipScalePackageNSPackageNumberSLB16A

PinDescriptions

PinNumber

PinNameOSCIN16-PinCSP15

16-PinI/OTSSOP1

I

Description

Referenceoscillatorinput.ACMOSinvertinggateinput.TheinputhasaVCC/2inputthresholdandcanbedrivenfromanexternalCMOSorTTLlogicgate.

I/OCircuitConfiguration

VPVCC12

34

—ChargePumpPowerSupply.Mustbe≥

VCC.—MainPowerSupply.VCCmayrangefrom

2.7Vto5.5V.Bypasscapacitorsshouldbeplacedascloseaspossibletothispinandbeconnecteddirectlytothegroundplane.OChargePumpoutput.Forconnectiontoa

loopfilterfordrivingthevoltagecontrolinputofanexternalVCO.

CPo35

GND46—Ground.

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PinNumber

PinNameFINB16-PinCSP5

16-PinI/OTSSOP7

I

Description

RFprescalercomplementaryinput.Forsingleendedoperation,thispinshouldbeACgrounded.TheLMX2346/7canbedrivendifferentiallywhenabypasscapacitorisomitted.

I/OCircuitConfiguration

FIN68I

RFPLLprescalerinput.SmallsignalinputfromtheVCO.

CLOCK89I

HighimpedanceCMOSClockinput.Dataisclockedinontherisingedge,intothe18-bitshiftregister.

DATA910I

Binaryserialdatainput.DataenteredMSBfirst.LSBiscontrolbit.HighimpedanceCMOSinput.

LE1011I

LatchEnableinput.WhenLatchEnabletransitionsHIGH,datastoredinthe18-bitshiftregisterisloadedintooneofthe2controlregisters,basedontheaddressbit.HighimpendanceCMOSinput.

CE1112I

ChipEnableinput.Provideslogical

power-downcontrolofthedevice.Pull-uptoVCCifunused.HighimpedanceCMOSinput.

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LMX2346/LPinNumber

PinName

LD

16-PinCSP13

16-PinI/OTSSOP14

Description

I/OCircuitConfiguration

OLockedDetectoutput.Multi-function

CMOSoutputpinthatprovides

multiplexedaccesstodigitallockdetect,open-drainanaloglockdetect,aswellastheoutputsoftheRandNcounters.

NC

7,12,14,2,13,15,

1616

NoConnect.

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IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheNationalSemiconductorSalesOffice/Distributorsforavailabilityandspecifications.PowerSupplyVoltage,(VCC)

PowerSupplyforChargePump,(VP)

VoltageonanypinwithGND=0V,exceptVP(Vi)StorageTemperatureRange,(TS)

−0.3Vto+6.5V

RecommendedOperatingConditions(Note1)

MinMaxUnit

PowerSupplyVoltage,(VCC)

2.7

5.5

VV˚C

PowerSupplyforChargePump,(VP)OperatingTemperature,(TA)

VCC6.0−40+85

−0.3Vto+6.5V−0.3VtoVCC+0.3V−65˚Cto+150˚C

ElectricalCharacteristics

Thefollowingconditionsapply;VCC=3.0V,VP=3.0V;−40˚C≤TA≤85˚C,unlessspecifieddifferently.SymbolICCICCPowerSupplyCurrent,LMX2346

VCC=5.5V

PowerSupplyCurrent,LMX2347

VCC=5.5V

ICC-pwdn

PowerDownCurrent

CLOCK,DATA,LE=GNDCE=GND

14.53.5

4.57.05.58.010

mAmAmAmAµA

Parameter

Conditions

Min

Typ

Max

Units

RFPRESCALERFINOperatingFrequency,RFPrescaler,LMX2346OperatingFrequency,RFPrescaler,LMX2347

PFINInputSensitivity,RFPrescaler

2.7V≤VCC≤3.0V(Note6)3.0VPHASEDETECTORFφFOSCVOSCIIHIILICPo-sourceICPo-sinkICPo-triICPo-sinkvs.

ICPo-sourceICPovsVCPoICPovsTAPhaseDetectorFrequencyOperatingFrequency,ReferenceOscillatorInput

InputSensitivity,ReferenceOscillatorInput

OSCinHigh-LevelInputCurrentOSCinLow-LevelInputCurrentChargePumpSourceCurrentChargePumpSinkCurrentChargePumpTRI-STATECurrentCPSinkvs.SourceMismatch

(Note10)(Note7)

VIH=VCC=5.5VVIL=0V,VCC=5.5VVCPo=Vp/2VVCPo=Vp/2V

0.5V≤VCPo≤VP−0.5VVCPo=Vp/2TA=25˚(Note4)

0.5V≤VCPo≤VP−0.5VTA=25˚(Note4)VCPo=Vp/2V(Note4)

−2.5

3

−100

−4.04.0

2.51010

MHz

REFERENCEOSCILLATOR

50.4

104VCC−0.3100

MHzVPPµAµAmAmAnA%

0.20.2−15−10

2.02.5+0+0

GHzGHzdBmdBm

CHARGEPUMP

CPCurrentvs.VoltageCPCurrentvs.Temperature

1010

15%%

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LMX2346/LSymbolVIHVILIIHIILVOHVOLtCStCHtCWHtCWLtEStEWL(f)

Parameter

High-levelInputVoltageLow-levelInputVoltageHigh-levelInputCurrentLow-levelInputCurrentHigh-levelOutputVoltageLow-levelOutputVoltageDatatoClockSetUpTimeDatatoClockHoldTimeClockPulseWidthHighClockPulseWidthLowClocktoLatchEnableSetUpTime

LatchEnablePulseWidthSingleSide-BandPhaseNoise

ConditionsMin0.8VCCTypMax

LOGICALINTERFACE(CE,CLOCK,LE,DATA,LD)

0.2VCCVIH=VCC=5.5VVIL=0V,VCC=5.5VIOH=−500µAIOL=500µA(Note5)(Note5)(Note5)(Note5)(Note5)(Note5)

FIN=900MHzFφ=200kHzFOSC=10MHzVOSC=1.0VPPTA=25˚C(Note3)FIN=1750MHzFφ=200kHzFOSC=10MHzVOSC=1.0VPPTA=25˚C(Notes3,9)FIN=1960MHzFφ=200kHzFOSC=10MHzVOSC=1.0VPPTA=25˚C(Note3)FIN=2450MHzFφ=200kHzFOSC=10MHzVOSC=1.0VPPTA=25˚C(Note3)

LN(f)

NormalizedSingleSide-BandPhaseNoise

Fφ=200kHzFOSC=10MHzVOSC=1.0VPPTA=25˚C(Note8)

501050505050−1.0−1.0VCC−0.4

0.41.01.0

MICROWIREINTERFACE(CLOCK,LE,DATA)

PHASENOISE

−91

−86

−85

−83

−164.5

Note1:AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.RecommendedOperatingConditionsindicatecondwhichthedeviceisintendedtobefunctional.ForguaranteedspecificationsandtestconditionsseetheElectricalCharacteristics.

Note2:ThisdeviceisahighperformanceRFintegratedcircuitwithanESDrating<2kV.Handlingandassemblyofthisdeviceshouldonlybedoneprotectedworkstations.

Note3:PhaseNoiseismeasuredusingareferenceevaluationboardwithaloopbandwidthofapproximately12kHz.Thephasenoisespecificatiocompositeaverageof3measurementsmadeatfrequencyoffsetsof2.0,2.5and3.0kHz.

Note4:SeeChargePumpMeasurementDefinitionsfordetailonhowthesemeasurementsaremade.Note5:SeeSerialInputDataTiming.Note6:SeeFINSensitivityTestSetup.Note7:SeeOSCinSensitivityTestSetup.

Note9:ThisparameterisderivedfromNormalizedSingleSide-PhaseNoise,Ln(f).

Note10:ForFOSCfrequenciesbelow10MHz,itisrecommendedthattherisetimeofthesignaldoesnotexceed25ns.

Note8:NormalizedSingle-SideBandPhaseNoiseisdefinedas:LN(f)=L(f)−20log(FIN/Fφ),whereL(f)isdefinedastheSingleSide-BandPhaseN

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ICCvsVCCLMX2346/7

20038422

CPOTRI-STATEvsCPOVoltageat85˚C

20038423

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LMX2346/LLMX2346/7ChargePumpSweeps

20038424

SinkvsSourceMismatch

(SeeforumlaunderChargePumpCurrentSpecificationsDefinitions)

20038425

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ChargePumpCurrentVariation

(SeeforumlaunderChargePumpCurrentSpecificationsDefinitions)

20038426

LMX2346FINSensitivityvsFrequencyat3.0V

20038427

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分销商库存信息:

NATIONAL-SEMICONDUCTORLMX2346TM/NOPBLMX2347TM/NOPBLMX2347SLBX/NOPBLMX2346TMX/NOPB

LMX2346SLBX/NOPBLMX2347TMX/NOPB