TI-LMX2592低噪音宽带RF锁相环(PLL)解决方案

TILMX2592低噪音宽带RF锁相环(PLL)解决方案时间：2016-03-2510:14:13作者：TI来源：中电网TI公司的LMX2592是集成了VCO的低噪音宽带RF(20MHz-9.8GHz)锁相环(PLL),支持分数N和整数N模式,6GHz输出的综合噪音49fs,输入频率高达1.4GHz,单电源3.3V工作,主要用在测试/测量设备,防卫和雷达(RADAR),微波骨干网,高速数据转换器的高性能时钟源和卫星通信.本文介绍了LMX2592主要特性,功能框图,应用电路以及评估板LMX2592EVM主要特性和测试建立电路,评估板电路图,材料清单和PCB设计图.TheLMX2592isalow-noise,widebandRFPLLwithintegratedVCOthatsupportsafrequencyrangefrom20MHzto9.8GHz.Thedevicesupportsbothfractional-Nandinteger-Nmodes,witha32-bitfractionaldividerallowingfinefrequencyselection.Integratednoiseof49fsfor6GHzoutputmakesitanideallownoisesource.Combiningbest-in-classPLLandintegratedVCOnoisewithintegratedLDOs,thisdeviceremovestheneedformultiplediscretedevicesinhighperformancesystems.Thedeviceacceptsinputfrequenciesupto1.4GHz,whichcombinedwithfrequencydividersandprogrammablelownoisemultiplierallowsflexiblefrequencyplanning.Theadditionalprogrammablelownoisemultiplierletsusersmitigatetheimpactofintegerboundaryspurs.InFractional-Nmode,thedevicecanadjusttheoutputphasebya32-bitresolution.Forapplicationsthatneedfastfrequencychanges,thedevicesupportsafastcalibrationoptionwhichtakeslessthan25µs.Thisperformanceisachievedbyusingsingle3.3-Vsupply.Itsupports2flexibledifferentialoutputsthatcanbeconfiguredassingle-endedoutputsaswell.UserscanchoosetoprogramoneoutputfromtheVCO(ordoubler)andthesecondfromthechanneldivider.Whennotbeingused,eachoutputcanbemutedseparately.LMX2592主要特性:OutputFrequencyRangefrom20to9800MHzIndustryLeadingPhaseNoisePerformanceVCOPhaseNoise:–134.5dBc/Hzat1-MHzOffsetfor6GHzOutputNormalizedPLLNoiseFloor:–231dBc/HzNormalizedPLLFlickerNoise:–126dBc/Hz49fsRMSJitter(12kHzto20MHz)for6GHzOutputInputClockFrequencyupto1400MHzPhaseDetectorFrequencyupto200MHz,andupto400MHzinInteger-NModeSupportsFractional-NandInteger-NModesDualDifferentialOutputsInnovativeSolutiontoReduceSpurs25-µsFastCalibrationModeProgrammablePhaseAdjustmentProgrammableChargePumpCurrentProgrammableOutputPowerLevelSPIorµWire(4-WireSerialInterface)SinglePowerSupplyOperation:3.3VLMX2592应用:Test/MeasurementEquipmentDefenseandRADARMicrowaveBackhaulHigh-PerformanceClockSourceforHigh-SpeedDataConvertersSatelliteCommunications图1.LMX2592功能框图图2.LMX2592典型应用电路图评估板LMX2592EVMLMX2592EVMHighPerformance,WidebandPLLatinum™RFSynthesizerEvaluationBoardThisEvaluationModuleisfortheLMX2592,whichoutputsveryhighfrequencysignalswithindustryleadingphasenoise.TheintegratedVCOallowsminimaldiscreteexternalcomponentstodesign.ThePCBisoptimizedforperformanceaswellasdesignedforeasycustomizationoftheloopfilter.AnLEDisdesignedforquickvisualcheckonthePLLlockstatus.Withanon-boardoscillator,setupprocessonlyrequiresa3.3VpowersupplyandanincludedUSB2ANYmodule.Thesoftwareissimple,withanintuitiveanduserfriendlyGUI.评估板LMX2592EVM主要特性:Verylowphasenoiseoutputfrom20to9800MHzCanlocktoinputssignalsfrom5to1400MHzSingle3.3VpowersupplyTwodifferentialoutputswithprogrammableoutputpowerThisEVMhasthecompletecircuitforthesynthesizer,optimizedandtestedforperformance,andincludesaUSBprogrammingmodule图3.评估板LMX2592EVM外形图图4.评估板LMX2592EVM测试图图5.评估板LMX2592EVM电路图评估板LMX2592EVM材料清单:图6.评估板LMX2592EVMPCB设计图(1)图7.评估板LMX2592EVMPCB设计图(2)图8.评估板LMX2592EVMPCB设计图(3)图9.评估板LMX2592EVMPCB设计图(4)图10.评估板LMX2592EVMPCB设计图(5)图11.评估板LMX2592EVMPCB设计图(6)图12.评估板LMX2592EVMPCB设计图(7)图13.评估板LMX2592EVMPCB设计图(8)图14.评估板LMX2592EVMPCB设计图(9)图15.评估板LMX2592EVMPCB设计图(10)AO-Electronics傲壹电子官网：中文网：