标签: micrf505

micrf505MICRF505MicrelMICRF505868MHzand915MHzISMBandTransceiverGeneralDescriptionTheMICRF505isatruesinglechip,frequencyshiftkeying(FSK)transceiverintendedforuseinhalf-duplex,bidirectionalRFlinks.Themulti-channeledFSKtransceiverisintendedforUHFradioequipmentincompliancewiththeNorthAmericanFederalCommunicationsCommission(FCC)part15.247and249,aswellastheEuropeanTelecommunicationStandardInstitute(ETSI)specification,EN300220.ThetransmitterconsistsofaPLLfrequencysynthesizerandapoweramplifier.Thefrequencysynthesizerconsistsofavoltage-controlledoscillator(VCO),acrystaloscillator,dualmodulusprescaler,programmablefrequencydividers,andaphase-detector.Theloop-filterisexternalforflexibilityandcanbea……