FrequencySynthesizer
Introduction
TheADF41020frequencysynthesizercanbeusedtoimplementlocaloscillatorsashighas18GHz intheupconversionanddownconversionsectionsofwirelessreceiversandtransmittersIt consistsofalownoise,digitalphasefrequencydetector(PFD),aprecisionchargepump,a programmablereferencedivider,andhighfrequencyprogrammablefeedbackdividers(A,B,and P).Acompletephase-lockedloop(PLL)canbeimplementedifthesynthesizerisusedwithan externalloopfilterandvoltagecontrolledoscillator(VCO)Thesynthesizercanbeusedtodrive externalmicrowaveVCOsviaanactiveloopfilterItsveryhighbandwidthmeansafrequency doublerstagecanbeeliminated,simplifyingsystemarchitectureandreducingcostThe ADF41020issoftware-compatiblewiththeexistingADF4106/ADF4107/ADF4108familyof devicesfromAnalogDevices,Inc.Theirpinoutsmatchverycloselywiththeexceptionofthe ADF41020’ssingle-endedRFinputpin,meaningonlyaminorlayoutchangeisrequiredwhen updatingcurrentdesigns.
KeyFeatures
·18GHzMaximumRFInputFrequency:Capableofhandlingextremelyhighfrequencies,making itsuitableforcutting-edgeRFapplications
·IntegratedSiGePrescaler:Enhancesperformancebyprovidingprogrammableprescalervalues (8/9,16/17,32/33,64/65).
·WidePowerSupplyRange:Operateswitha285Vto315Vpowersupply
·ProgrammableChargePumpCurrents:Allowsforfine-tuningofthechargepump,optimizing PLLperformance.
·3-WireSerialInterface:Simplifiesintegrationandcontrol.
·AnalogandDigitalLockDetect:ProvidesreliablePLLlockstatusindication
·HardwareandSoftwarePower-DownModes:Enablespower-savingfunctionality,crucialfor battery-operateddevices
Specifications
TheADF41020BCPZshowcasesimpressivetechnicalspecifications,ensuringhighperformance acrossvariousapplications:
·RFInputFrequency:4.0GHzto18.0GHz.
·RFInputSensitivity:-10dBmto+10dBm
·MaximumAllowablePrescalerOutputFrequency:350MHz
·ReferenceInputFrequency:10MHzto400MHz
·PhaseDetectorFrequency:Upto100MHz
·ChargePumpCurrent:Programmablefrom625µAto50mA
·PowerSupplies:AVDD,DVDD,andVPeachrangefrom285Vto315V
·PowerConsumption:Typically30mAforAVDD,5mAforVP,withapower-downmodecurrent of1µA.
PerformanceCharacteristics
TheADF41020BCPZboastsexcellentphasenoiseandspuriousperformance:
·NormalizedPhaseNoiseFloor:-221dBc/Hz
·PhaseNoisePerformance:
oAt5.7GHz:-89dBc/Hzat1kHzoffset.
oAt12.5GHz:-82dBc/Hzat3kHzoffset.
oAt1764GHz:-96dBc/Hzat100kHzoffset
·SpuriousSignals:
oAt5.7GHz:-80dBcto-86dBc.
oAt12.5GHz:-98dBcto<-110dBc.
oAt17.64GHz:-109dBcto-113dBc.
Applications
TheversatilityoftheADF41020BCPZmakesitsuitableforawiderangeofapplications:
·MicrowavePoint-to-Point/MultipointRadios:Ensuresreliablecommunicationlinkswith high-frequencystability
·WirelessInfrastructure:Supportsthedemandingrequirementsofmodernwirelessnetworks.
·VSATRadios:Idealforsatellitecommunicationsystemsrequiringhigh-frequencylocal oscillators
·TestEquipmentandInstrumentation:Providesprecisefrequencygenerationforvarious measurementandtestingscenarios.
CompatibleElectronicComponentSeries
TheADF41020BCPZcanbeeffectivelyusedwithvariouselectroniccomponentseriestoenhance itsfunctionalityandperformanceHerearefiverecommendedseries:
1HMC830LP6GESeries-AnalogDevices
·ProductCategory:WidebandPLLwithIntegratedVCO
·ParameterValues:FrequencyRange:25MHzto3GHz,PhaseNoise:-115dBc/Hzat100 kHzoffset,OutputPower:5dBm,SupplyVoltage:3.3V,CurrentConsumption:300mA
·ApplicationScenarios:WirelessInfrastructure,TestEquipment,Point-to-Pointand Point-to-MultipointRadios,MilitaryCommunications
·RecommendedSpecificModels:HMC830LP6GE
2HMC547LP3Series-AnalogDevices
·ProductCategory:HighIsolationSPDTSwitch
·ParameterValues:FrequencyRange:DCto20GHz,InsertionLoss:1dB,Isolation:50dBat 10GHz,SupplyVoltage:5V,ControlVoltage:0/5V
·ApplicationScenarios:RFandMicrowaveSwitching,TestEquipment,MilitaryandSpace Communications,WirelessInfrastructure
·RecommendedSpecificModels:HMC547LP3E
3.ADF5001BCPZSeries-AnalogDevices
·ProductCategory:WidebandFrequencyDivider
·ParameterValues:InputFrequencyRange:10GHzto18GHz,DivisionRatios:Fixeddivide by4,InputPowerRange:-15dBmto+10dBm,SupplyVoltage:33V,CurrentConsumption:90 mA
·ApplicationScenarios:FrequencySynthesis,TestEquipment,RadarSystems,Satellite Communications
·RecommendedSpecificModels:ADF5001BCPZ
4.ADP150Series-AnalogDevices
·ProductCategory:UltralowNoiseLinearRegulator
·ParameterValues:OutputVoltageRange:1.2Vto3.3V,OutputCurrent:150mA,Noise:9 µVrmsfrom10Hzto100kHz,SupplyVoltage:22Vto55V,QuiescentCurrent:10µA
·ApplicationScenarios:PowerSupplyforPLLs,VCOs,andotherRFcomponents, High-PerformanceAnalogSystems,Battery-PoweredDevices,PortableandHandheldDevices
·RecommendedSpecificModels:ADP150ACBZ-3.3-R7
5.HMC1060LP3ESeries-AnalogDevices
·ProductCategory:Wideband,LowNoise,LowDropoutLinearRegulator
·ParameterValues:OutputVoltageRange:18Vto50V,OutputCurrent:Upto800mA, DropoutVoltage:200mVat500mA,SupplyVoltage:27Vto55V,Noise:10µVrmsfrom10Hz to100kHz
·ApplicationScenarios:PowerSupplyforPLLSynthesizers,VCOs,andMixers,Test Equipment,CommunicationsInfrastructure,MilitaryandAerospace
·RecommendedSpecificModels:HMC1060LP3E
Conclusion
TheADF41020BCPZisastate-of-the-artmicrowavePLLsynthesizerthatcombineshigh-frequency capabilitywithflexibilityandeaseofuseItscomprehensivefeatureset,superiorperformance, andwideapplicationrangemakeitanexcellentchoiceforengineersanddesignersworkingon advancedRFsystemsWhetherinwirelessinfrastructure,satellitecommunication,ortest equipment,theADF41020BCPZdeliverstheprecisionandreliabilityneededfortoday’ s high-frequencyapplicationsWhenpairedwithcompatiblecomponentslikethoselistedabove, theADF41020BCPZachievesoptimalperformance,enhancingitsutilityacrossvariousadvanced applications