基于ADL5354设计的高性能RF混频方案

第第页基于ADL5354设计的高性能RF混频方案ADL5354是ADI公司的高度线性双平衡(RF和LO平衡)RF混频器,输入频率从2300MHz到2900MHz.平衡的无源混频器具有良好的LO-RF泄漏,优于-35dBm.IF频率范围从30MHz到450MHz,功率转换增益8dB,单边带(SSB)噪音10dB,输入IP3为25dBm,输入P1为11dBm,LO典型驱动为0dBm.工作电压3.3V-5.0V,主要用在蜂窝无线基站接收器,无线链接下变换器等.本文介绍ADL5354主要特性,方框图以及典型应用,评估板电路图和元件配置表.

TheADL5354usesahighlylinear,doublybalanced,passivemixercorealongwithintegratedRFandlocaloscillator(LO)balancingcircuitrytoallowsingle-endedoperation.TheADL5354incorporatestheRFbaluns,allowingforoptimalperformanceovera2300MHzto2900MHzRFinputfrequencyrange.ThebalancedpassivemixerarrangementprovidesgoodLO-to-RFleakage,typicallybetterthan−35dBm,andexcellentintermodulationperformance.Thebalancedmixercorealsoprovidesextremelyhighinputlinearity,allowingthedevicetobeusedindemandingcellularapplicationswherein-bandblockingsignalsmayotherwiseresultinthedegradationofdynamicperformance.AhighlinearityIFbufferamplifierfollowsthepassivemixercoretoyieldatypicalpowerconversiongainof8.2dBandcanbeusedwithawiderangeofoutputimpedances.

TheADL5354providestwoswitchedLOpathsthatcanbeusedinTDDapplicationswhereitisdesirabletoping-pongbetweentwolocaloscillators.LOcurrentcanbeexternallysetusingaresistortominimizedccurrentcommensuratewiththedesiredlevelofperformance.Forlowvoltageapplications,theADL5354iscapableofoperationatvoltagesdownto3.3Vwithsubstantiallyreducedcurrent.Underlowvoltageoperation,anadditionallogicpinisprovidedtopowerdown(<300μA)thecircuitwhendesired.

TheADL5354isfabricatedusingaBiCMOShighperformanceICprocess.Thedeviceisavailableina6mm×6mm,36-leadLFCSPandoperatesovera−40℃to+85℃temperaturerange.

ADL5354主要特性:

RFfrequencyrangeof2300MHzto2900MHz

IFfrequencyrangeof30MHzto450MHz

Powerconversiongain:8dB

SSBnoisefigureof10dB

InputIP3of25dBm

InputP1dBof11dBm

TypicalLOdriveof0dBm

Single-ended,50ΩRFandLOinputports

HighisolationSPDTLOinputswitch

Single-supplyoperation:3.3Vto5V

Exposedpaddle,6mm×6mm,36-leadLFCSP

ADL5354应用:

Cellularbasestationreceivers

Transmitobservationreceivers