NT-QQ11对讲机装配说明.docx
系统结构图收音线路是采纳基于DSP技术的SOC芯片RD5807SP,RDA5807SP内部可分模拟和数字部分，模拟部分包括支持FM频段的低噪声放大器(1.NA).自动增益限制器(AGC),正交镜像抑制混频器(MIXER)、可调增益放大器(PGA),自动频率限制器(AFC),高精度模数转换器(DC),高精度数模转换器(DAC)及电源用的1.DO；数字部分包括音频处理DSP及数字接口。天线接收到空中的电台信号，首先由1.NA将信号放大，并转为差分输出电压，这可以有效抑制芯片内部及PCB板上的噪声，提高接收灵敏度，混频器将1.NA输出信号变频到低中频，同时实现对镜像的抑制，PGA将混频器输出的I、Q两路正交中频信号放大送给ADC,信号的增益由DSP动态限制，有效地降低了对ADC输入动态范围的要求，ADC采纳的是Delta-Sigma带通过采样结构，它具有高精度低功耗特点，并对带外噪声有抑制作用，适用中低频信号处理：DSP对DC输出信号解调后，将音频信号分别送给左右声道高精度DAC,DAC具有低通滤波的作用，将语音频带外的噪声进行衰减；最终音频收音Ie音构图收音IC参数:CharcteristicsSymbolRatingDCsupplyvoltageV+<5.5VInputvoltagerangeVin0.5Vto(V+)+0.5vOperatingtemperatureToOC+70"CStoragetemperatureTsto-40+90,c收音IC直流特性VDD=3.0V,T=25*CCharoteristicsSynbol1.imitunitconditionMin.Typ-Max.OperatingvoltageVDD2.03.6VOperatingcurrentIa25.0mAVDD=3.0VStandbycurrent1st100UaVDD=3.0VInputcurrentIin-10+10mAInputvoltageVin-0.3VIO+0.3V1.NAFMInput1.evelVina-20DBmInputHigh1.evelVih2.0VVInput1.ow1.evelVil0.8V收音IC接收特性(VDD=3.0V,T=251C1CharcteriticSymbol1.imitunitconditionMin.Typ.Max.FMInputFreqencyFin65.0108.0MHzSensitivity123Vrf1.21.5VEMF(S+N)N=26dB1.NAInputResistance7RinIii150I1.NAInputCapacitance7Cin246PFInputIP3IP3in80dBVAGCD=IAMSuppression1,2am40dBm=0.3AdjacentChannelS20()45dB±200KHzSclcctivily1.eftandRightAudioFrequencyOutputVoltage(Pins1.OUTandROUT)VAF1.;VAFR110mVVolume=MaXMaximumSignalPlusNoisetoNoiseRatiOI23.5(S+N)N5460dBStereoChannelSeparationClSCS35dBAudioTotalHarmonicDistortion16THD0.30.5%Aud100utput1./RImbalancecxaoi1dBAud100utput1.oadingResistanceR1.32ASingle-ended放射IC工作条件:ParameterSymbolOperatingConditionMinTypMaxUnits1.8VAnalogSupply1VDDRelativetoGND1.61.82.0VIOllRcguIatorSupplyIOVDDRelative(oGND1.63.6VOperatingTcmpTaAmbientTemperature02570uCNote:I.Noexternalvoltageshouldbeappliedtothissupply.Decouplingcapshouldbeinstead放射IC规格与性能IOVDD=1.6-3.6V.F1.=】kHz)ParameterSymbolTestZOpcratingCondiIiOnMinNomMiixVnilsFMFrequencyRangeF11Pin1676108MHzCurrentConMiniptionKlXJPm4withPA(PoWeramp.>adefaultpowermode(PA.bias=0.RFGAJN3:0=Illl)-15mAStandbyCurrentPin4-0.1IASignaltoNoiseRatioSNRVn=0.7Vrp.GB=O60*dTotalHarmonicDistortionTHDVi,=0.7VphGt.=O-03%IxhzKighlChdnnelBalanceBA1.Vn=0.7VprG,.=00.20.2dHStcrcoSeparation<1.cft<->Right)SIPVrt=0.7Vpp.Gl.=040-dBSuhCarrierRexl11nRat>SCRVn=0.7VfG.=060dKInputSwing1VHSingle-endedinput-0351.4VrmsPGARiingefurud>InpulGm12012dBPGAGainStepforAudioInput14dBRequiredInputCornnum-ModeVmPin5JngI2VVoltagewhenDC<oplcdfU.O.cPowerSupplyRejection'PSRRIOVDD=J.9-3.6V44)*dBGroundBounceRejectionGSRRIOVDD=1.9-3.6V40-.dBInputResistance(AudioInput)RPin5.7120150180kInputCapociiancc(AudioInput>CCPin5.70.50.81.2PFAudiolnpt11xcyBandFgPin5.720-5kHzTransmit1.evelV<96103113dBVChannelStepSTEP-50kHzPilotDeviation7.515kHzAudioDeviation75150kHzFrequencyResponseMono.-3dB.F=60kHz.IIJz5Q75sre-emhasis>WlPreenlmisTimeCo½a11SIGPROC<1>I-50-sSIG.PROC<0>=0-75.陵CryMabEMeniaIClockC1.KInputCIOCk7.6MHz2-wireI2CClockSC1.Pin140l400kHzHigh1.evelInputVoltageVihRin4.8.12.14.160.75xIOVDDI1.OW1.evelInputVoltageVilPin4.8.12.!4.16.11050.25xVU.二JIOVDDNotes:1. MaximumisgivenontheconditionofPGAgain=-12dB.2. Fin=20-15kHz.放射IC引脚定义PinIndexNameI/OTypeFunction2XlAnalogl,OCryXullinput.3XOAMk里1.OCr),sUilinput4IOVDDPower153.3VexternallogicIOVDDl.5.11J5GNDGnHmdCanbeshorted(ogcherandConnCCtCdgroUndtoground6IN.nukInputIxhchannelauhoinpul.7INRAnalogInputRightchannelaudioinput.8SWDigitalInputControlbit.Chipenable,supplymode9,12GNDGrxndGrVMlndIORSTBDigitalInputReset(activelow).13SDADigitalI/OSerialdata1.O.SC1.StcrcoAixlio1.inelnp<HPA_OUTH33nFIN1.KTO8031.IOVDD33nFINR1.5.11.!5GNDXlKTo80333VTypicalconfigurationforadrop-inreplacementAsshownintheredblockabove.Pin1.5.11and15areVDDpinsinKTO8O3Ihalarerequiredtobeconnectedtoadecouplingcapacitor.ThesefourpinsareGNDpinsinKTO8()3M.Customerscanreplacethedecouplingcapacitorofa0-ohnresisterwithoutPCBboardchange.六.装配操作说明：装配前打第：1 .图纸：原理图及装配图，物
