600MHz to 1100MHz600兆赫至1100MHz 高线性度直接 正交调制器

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1、LT5558600MHzto1100MHzHighLinearityDirectQuadratureModulatorFEATURESDESCRIPTION■DirectConversionfromBasebandtoRFTheLT®5558isadirectI/Qmodulatordesignedforhigh■HighOIP3:+22.4dBmat900MHzperformancewirelessapplications,includingwireless■LowOutputNoiseFloorat20MHzOffset:infrastructure.Itallowsdirectmo

2、dulationofanRFsignalNoRF:–158dBm/HzusingdifferentialbasebandIandQsignals.ItsupportsPOUT=4dBm:–152.7dBm/HzGSM,EDGE,CDMA,CDMA2000,andothersystems.It■LowCarrierLeakage:–43.7dBmat900MHzmayalsobeconfiguredasanimagerejectupconverting■HighImageRejection:–49dBcat900MHzmixer,byapplying90°phase-shiftedsigna

3、lstotheIand■3ChannelCDMA2000ACPR:–70.4dBcat900MHzQinputs.ThehighimpedanceI/Qbasebandinputsconsist■IntegratedLOBufferandLOQuadraturePhaseofvoltage-to-currentconvertersthatinturndrivedouble-Generatorbalancedmixers.Theoutputsofthesemixersaresummed■50ΩAC-CoupledSingle-endedLOandRFPortsandappliedtoano

4、n-chipRFtransformer,whichconverts■HighImpedanceInterfacetoBasebandInputsthedifferentialmixersignalstoa50Ωsingle-endedoutput.with2.1VCommonModeVoltageThebalancedIandQbasebandinputportsareintended■16-LeadQFN4mm×4mmPackageforDCcouplingfromasourcewithacommon-modevoltagelevelofabout2.1V.TheLOpathconsi

5、stsofanLOAPPLICATIONSbufferwithsingle-endedinput,andprecisionquadrature■RFIDSingle-SidebandTransmittersgeneratorswhichproducetheLOdriveforthemixers.■InfrastructureTThesupplyvoltagerangeis4.5Vto5.25V.XforCellularandISMBands■ImageRejectUp-ConvertersforCellularBands,LT,LTCandLTMareregisteredtrademar

6、ksofLinearTechnologyCorporation.Allothertrademarksarethepropertyoftheirrespectiveowners.■Low-NoiseVariablePhase-Shifterfor600MHzto1100MHzLocalOscillatorSignals■MicrowaveLinksTYPICALAPPLICATIONCDMA2000ACPR,AltCPRandNoisevs600MHzto1100MHzDirectConversionTransmitterApplicationRFOutputPowerat900MHzfo

7、r1and3Carriers5VVCC2x100nF8,13–40–110NOISEFLOORAT30MHzOFFSET(dBm/Hz)DOWNLINKTESTMODEL64DPCHLT555814–50–120∫IDAC16V-1RF=600MHzTO3-CHACPR1100MHz3-CHALTCPRI-CHPA–60–1301O°111-CHACPREN90°–70–140Q-CHBALUN7ACPR,ALTCPR(dBc)1-