RDA5820-datasheet-V2.0

Copyright©RDAMicroelectronicsInc.2006.Allrightsarereserved.TheinformationcontainedhereinistheexclusivepropertyofRDAandshallnotbedistributed,reproduced,ordisclosedinwholeorinpartwithoutpriorwrittenpermissionofRDA.RDA5820SINGLE-CHIPBROADCASTFMTRANSCEIVERRev.2.0–July.20111GeneralDescriptionTheRDA5820isasingle-chipbroadcastFMtransceiverwithfullyintegratedsynthesizer,IFselectivityandMPXdecoder.ThechipusestheCMOSprocess,supportmulti-interfaceandrequiretheleastexternalcomponent.Thepackagesizeis4X4mmandiscompletelyadjustment-free.Allthesemakeitverysuitableforportabledevices.TheRDA5820hasapowerfullow-IFdigitalaudioprocessor,thismakeithaveoptimumsoundqualitywithvaryingreceptionconditions.TheRDA5820useRDApatenteddualsynthesizers,alldigitaltransmitstructure,thismakeithaveperfectlytransmitionperformanceandagility.TheRDA5820support65M~115Mfrequencybandreceiveandtransmit,integrate4Kmemory,thesemakeitcanbeusedinsimplewirelesscontrolappliancesuchastoy.1.1FeaturesCMOSsingle-chipfully-integratedFMtransceiverLowpowerconsumptionTotalcurrentconsumptionlowerthan20mAat3.0VpowersupplySupportworldwideandcampusfrequencyband65-108MHzDigitallow-IFtunerImage-rejectdown-converterHighperformanceA/DconverterIFselectivityperformedinternallyFullyintegrateddigitalfrequencysynthesizerFullyintegratedon-chipRFandIFVCOFullyintegratedon-chiploopfilterAlldigitaltransmitterAutonomoussearchtuningSupportintegratedRx/TxPCBantennaSupportSNRFMsearchingInclude4KmemorySupport32.768KHzcrystaloscillatorDigitalautogaincontrol(AGC)DigitaladaptivenoisecancellationMono/stereoswitchSoftmuteHighcutProgrammablede-emphasis(50/75µs)Receivesignalstrengthindicator(RSSI)BassboostVolumecontrolSupportI2SdigitaltransmitterSupportaudiopoweramplifier(32Ωresistance234561717161514131889101112242322212019GNDPADGNDRFGNDFMINGNDRDA5820VDDRINLOUTGNDFMOUTROUTGNDLINMODESENSCLKSDIORCLKVIOGNDNCNCGPIO1GPIO2GPIO3Figure1-1.RDA5820TopViewRDAMicroelectronics,Inc.RDA5820FMTransceiverV2.0TheinformationcontainedhereinistheexclusivepropertyofRDAandshallnotbedistributed,reproduced,ordisclosedinwholeorinpartwithoutpriorwrittenpermissionofRDA.Page2of28loading)I2Line-levelanalogoutputvoltageSdigitalinput/outputinterface!OnlySupport32.768KHzreferenceclock2-wireand3-wireserialcontrolbusinterfaceDirectlysupport32ΩresistanceloadingIntegratedLDOregulator2.7to5.5Voperationvoltage4X4mm24pinQFNpackage1.2ApplicationsCellularhandsetsMP3,MP4playersPortableradiosPDAs,NotebookPCsWirelessToysRDAMicroelectronics,Inc.RDA5820FMTransceiverV2.0TheinformationcontainedhereinistheexclusivepropertyofRDAandshallnotbedistributed,reproduced,ordisclosedinwholeorinpartwithoutpriorwrittenpermissionofRDA.Page2of282TableofContents1GeneralDescription....................................................................................................................................11.1Features.........................................................................................................................................11.2Applications..................................................................................................................................22TableofContents.........................................................................................................................................23FunctionalDescription................................................................................................................................33.1FMTransceiverStructure..................................................................................................................33.2FMReceiver..................................................................................................................................33.3FMTransmitter..............................................................................................................................43.4AudioAmplify..............................................................................................................................43.5I2S.................................................................................................................................................43.6PA..................................................................................................................................................43.7Synthesizer1..................................................................................................................................43.8Synthesizer2....................................................................................................................................53.9PowerSupply................................................................................................................................53.10RESETandControlInterfaceselect.............................................................................................53.11ControlInterface............................................................................................