基于ADL5354設(shè)計的高性能RF混頻方案

第第頁基于ADL5354設(shè)計的高性能RF混頻方案ADL5354是ADI公司的高度線性雙平衡(RF和LO平衡)RF混頻器,輸入頻率從2300MHz到2900MHz.平衡的無源混頻器具有良好的LO-RF泄漏,優(yōu)于-35dBm.IF頻率范圍從30MHz到450MHz,功率轉(zhuǎn)換增益8dB,單邊帶(SSB)噪音10dB,輸入IP3為25dBm,輸入P1為11dBm,LO典型驅(qū)動為0dBm.工作電壓3.3V-5.0V,主要用在蜂窩無線基站接收器,無線鏈接下變換器等.本文介紹ADL5354主要特性,方框圖以及典型應(yīng)用,評估板電路圖和元件配置表.

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應(yīng)用:

Cellularbasestationreceivers

Transmitobservationreceivers