RDA5820NS-datasheet-v1-1

Copyright©RDAMicroelectronicsInc.2006.Allrightsarereserved.TheinformationcontainedhereinistheexclusivepropertyofRDAandshallnotbedistributed,reproduced,ordisclosedinwholeorinpartwithoutpriorwrittenpermissionofRDA.RDA5820NSSINGLE-CHIPBROADCASTFMTRANSCEIVERRev.1.1–Mar.20111GeneralDescriptionTheRDA5820NSisthenewestgenerationsingle-chipbroadcastFMreceive/transmittunerwithfullyintegratedsynthesizer,IFselectivityandMPXdecoder.ThechipusestheCMOSprocess,supportmulti-interfaceandrequiretheleastexternalcomponent.Thepackagesizeis3X3mmandiscompletelyadjustment-free.Allthesemakeitverysuitableforportabledevices.TheRDA5820NShasapowerfullow-IFdigitalaudioprocessor,thismakeithaveoptimumsoundqualitywithvaryingreceptionconditions.TheRDA5820NSuseRDApatenteddualsynthesizers,alldigitaltransmitstructure,thismakeithaveperfectlytransmitionperformanceandagility.TheRDA5820NSsupport50M~115MfrequencybandFMandRDS/RBDSreceiveandtransmit,supportpowersupplyrangeis1.8-5.5V,allthesemakeitcanbeusedinsimplewirelesscontrolappliancesuchasmobilephoneortoys.TheRDA5820NSpackageispin-to-pincompatiblewithFMreceivetunerRDA5802NS.1.1FeaturesCMOSsingle-chipfully-integratedFMtransceiverLowpowerconsumptionTotalcurrentconsumptionisabout22mAat3.0Vpowersupply(receivemode)Totalcurrentconsumptionisabout26mAat3.0Vpowersupply(maximumpowertransmitmode)Supportworldwideandcampusfrequencyband50-115MHzSupportflexiblechannelspacingmode100KHz,200KHz,50KHzand25KHzDigitallow-IFtunerImage-rejectdown-converterHighperformanceA/DconverterIFselectivityperformedinternallyFullyintegrateddigitalfrequencysynthesizerFullyintegratedon-chipRFandIFVCOFullyintegratedon-chiploopfilterAlldigitaltransmitterAutonomoussearchtuningSupportRDS/RBDSreceiveandtransmitSupportSNRFMsearchingSupport32.768KHzcrystaloscillatorDigitalautogaincontrol(AGC)DigitaladaptivenoisecancellationMono/stereoswitch2345161514131211789102019181716GNDPADGNDGNDFMINGNDRDA5820NSVDDGNDLOUTFMOUTROUTGNDSCLKSDIORCLKVIOGNDLINRINGPIO1GPIO2GPIO3Figure1-1.RDA5820NSTopViewRDAMicroelectronics,Inc.RDA5820NSFMTransceiverV1.1TheinformationcontainedhereinistheexclusivepropertyofRDAandshallnotbedistributed,reproduced,ordisclosedinwholeorinpartwithoutpriorwrittenpermissionofRDA.Page2of28SoftmuteHighcutProgrammablede-emphasis(50/75µs)Receivesignalstrengthindicator(RSSI)andSNRBassboostVolumecontrolSupportI2SdigitaltransmitterSupportaudiopoweramplifier(32Ωresistanceloading)I2Sdigitalinput/outputinterfaceLine-levelanalogoutputvoltage32.768KHz,12M,24M,13M,26M,19.2M,38.4MHzreferenceclockOnlysupportIICserialcontrolbusinterfaceDirectlysupport32ΩresistanceloadingIntegratedLDOregulator1.8to5.5Voperationvoltage3X3mm20pinQFNpackagePin-to-pincompatiblewithRDA5802NS1.2ApplicationsCellularhandsetsMP3,MP4playersPortableradiosPDAs,NotebookPCsWirelessToysRDAMicroelectronics,Inc.RDA5820NSFMTransceiverV1.1TheinformationcontainedhereinistheexclusivepropertyofRDAandshallnotbedistributed,reproduced,ordisclosedinwholeorinpartwithoutpriorwrittenpermissionofRDA.Page2of282TableofContents1GeneralDescription....................................................................................................................................11.1Features.........................................................................................................................................11.2Applications..................................................................................................................................22TableofContents.........................................................................................................................................23FunctionalDescription................................................................................................................................33.1FMTransceiverStructure..................................................................................................................33.2FMReceive...................................................................................................................................33.3FMTransmit..................................................................................................................................43.4AudioAmplify..............................................................................................................................43.5I2STransmit..................................................................................................................................43.6PA..................................................................................................................................................43.7Synthesizer1..................................................................................................................................43.8Synthesizer2....................................................................................................................................43.9PowerSupply...........................................