Maxim MAX199931.2-1.7GHz下变换混频方案
原标题:Maxim MAX199931.2-1.7GHz下变换混频方案
TheMAX19993dual-channeldownconverterisdesignedtoprovide6.4dBofconversiongain,+27dBminputIP3,15.4dBm1dBinputcom pressionpoint,andanoisefigureof9.8dBfor1200MHzto1700MHzdiversityreceiverapplications.Withanoptimized LOfrequencyrangeof1000MHzto1560MHz,thismixerisidealforlow-sideLOinjectionarchitectures.High-sideLOinjectionissupportedbytheMAX19993A,whichispin-pinandfunctionallycompatiblewiththeMAX19993.
Inadditiontoofferingexcellentlinearityandnoiseperformance,theMAX19993alsoyieldsahighlevelofcomponen tintegration.Thisdeviceincludestwodouble-balancedpassivemixercores,twoLObuffers,adual-inputLOselectableswitch,andapairofdifferentialIFoutputamplifiers.Integratedon-chipbalunsallowforsingle-endedRFandLOinputs.ThedevicerequiresanominalLOdriveof0dBmandatypicalsupplycurrentof337mAat VCC=+5.0Vor275mAatVCC=+3.3V.
TheMAX19993ispincompatiblewiththeMAX9985/MAX19985A/MAX9995/MAX19993A/MAX19994/
MAX19994A/MAX19995/MAX19995 Aseriesof700MHzto2200MHzmixersandpinsimilartothe MAX19997A/ MAX19999 seriesof1850MHzto4000MHzmixers,making thisen tire fa mily ofdownconverters idealforapp licationswhereacommon PC Blayoutisuse dacrossmulti plefrequency bands.
Thedeviceisavailableina6mmx6mm,36-pinTQFNpackagewithanexposedpad.Electricalperformanceisguaranteedovertheextendedtemperaturerange,from TC=-40NCto+85NC.
MAX19993主要特性:
S1200MHzto1700MHzRFFrequencyRange
S1000MHzto1560MHzLOFrequencyRange
S50MHzto500MHzIFFrequencyRange
S6.4dBTypicalConversionGain
S9.8dBTypicalNoiseFigure
S+27dBmTypicalInputIP3
S15.4dBmTypicalInput1dBCompressionPoint
S72dBcTypical2RF-2LOSpuriousRejectionatPRF=-10dBm
SDualChannelsIdealforDiversityReceiverApplications
S47dBTypicalChannel-to-ChannelIsolation
SLow-6dBmto+3dBmLODrive
SIntegratedLOBuffer
SInternalRFandLOBalunsforSingle-EndedInputs
SBuilt-InSPDTLOSwitchwith57dBLO-to-LOIsolationand50nsSwitchingTime
SPinCompatiblewiththeMAX9985/19985A/MAX9995/MAX19993A/MAX19994/
MAX19994A/MAX19995/MAX19995ASeriesof700MHzto2200MHzMixers
SPinSimilartotheMAX19997A/MAX19999Seriesof1850MHzto4000MHzMixers
SSingle+5Vor+3.3VSupply
SExternalCurrent-SettingResistorsProvideOptionforOperatingDeviceinReduced-Power/Reduced-PerformanceMode
MAX19993应用:
WCDMA/LTEBaseStations
WirelessLocalLoop
FixedBroadbandWirelessAccess
PrivateMobileRadios
MilitarySystems
图1。MAX19993方框图
图2。MAX19993典型应用电路图
元件数值列表:
责任编辑:David
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