Si4438-Chinese

修订版1.0版权所有©2014SiliconLaboratoriesSi4438-CSi4438-C高性能的低电流收发器特点应用说明SiliconLaboratories的Si4438为高性能的低电流收发器，可覆盖从425至525MHz的次千兆赫频段。Si4438针对中国智能仪表市场，特别适合于智能电表。该设备的覆盖区及引脚与Si446x无线电兼容，可为全世界的次千兆赫应用提供行业领先的性能。无线电设备是EZRadioPRO®产品系列的一部分，包括全套发射器、接收器和收发器的产品线，涵盖各种应用。所有零件都具有杰出的灵敏度—124dBm，可同时实现极低的有效电流和待机电流消耗。12.5kHz通道58dB相邻通道选择性的间距确保了严苛RF条件下的可靠接收操作。Si4438可提供超常的高达+20dBm具有显著TX效率的输出功率。高输出功率和灵敏度实现了业界领先的144dB链路预算，实现了范围扩展和高度可靠的通信链路。频率范围=425–525MHz接收灵敏度=–124dBm调制(G)FSKOOK昀大输出功率+20dBm低活动功耗14mARX超低电流断电模式30nA关机，40nA待机数据传输率=100bps到500kbps前导探测模式6在1.2kbps时mA平均Rx电流快速唤醒和跳数电源=1.8至3.8V出色的选择性能58dB相邻通道1MHz处阻断增益为75dB天线分集和T/R开关控制高度可配置的分组处理程序TX和RX64字节FIFO自动频率控制(AFC)自动增益控制(AGC)低BOM低电量探测器温度传感器20引脚QFN封装IEEE802.15.4g就绪适合中国调控（国家电网）中国智能仪表专利申请中引脚分配GNDPAD1231718192011121314678945161015GNDGPIO1nSELSDISDOSCLKNCSDNTXGPIO0VDDnIRQRXpRXnXINGPIO3GPIO2XOUTTXRampVDDSi4438-C2修订版1.0功能框图ProductFreq.RangeMaxOutputPowerTXCurrentRXCurrentSi4438425–525MHz+20dBm75mA13.7mAVCOLoopFilterPFD/CPFrac-NDiv30MHzXOLOGenLNARFPKDETPGAADCMODEMFIFOPacketHandler32KLPOSCBootupOSCLBDPORIFPKDETSPIInterfaceControllerDigitalLogicPowerRampCntlPALDOTXDIVRXPRXNTXVDDTXRAMPXOUTXINnSELSDISDOSCLKnIRQLDOsFBDIVPAVDDGPIO0GPIO1GPIO2GPIO3SDNSi4438-C修订版1.03目录章节页码1.电气规格.................................................................42.功能描述................................................................113.控制器接口..............................................................123.1.串行外围接口(SPI)..................................................123.2.快速响应寄存器.....................................................143.3.工作模式和计时.....................................................143.4.应用程序编程接口...................................................183.5.中断..............................................................183.6.GPIO.............................................................184.调制和硬件配置选项.......................................................194.1.调制类型..........................................................194.2.硬件配置选项.......................................................194.3.前导长度..........................................................215.内部功能块..............................................................235.1.RX链.............................................................235.2.RX调制解调器.....................................................235.3.合成器............................................................255.4.发送器（TX）......................................................275.5.晶体振荡器........................................................296.数据处理和分组处理程序...................................................316.1.RX和TXFIFO.....................................................316.2.分组处理程序.......................................................327.RX调制解调器配置.......................................................338.辅助块..................................................................338.1.唤醒定时器和32kHz时钟源...........................................338.2.低占空比模式（自动RX唤醒）........................................338.3.温度、电池电压和辅助ADC...........................................348.4.低电量探测器.......................................................358.5.天线分集..........................................................358.6.前导探测模式.......................................................359.引脚描述：Si4438-C......................................................3710.订购信息...............................................................3911.封装外形：Si4438.......................................................4012.PCB焊盘图案：Si4438...................................................4113.顶部标记...............................................................4313.1.Si4438顶部标记...................................................4313.2.顶部标记说明......................................................43联系信息..................................................................44Si4438-C4修订版1.01.电气规格Table1.DCCharacteristics*ParameterSymbolTestConditionMinTypMaxUnitSupplyVoltageRangeVDD1.83.33.8VPowerSavingModesIShutdownRCOscillator,MainDigitalRegulator,andLowPowerDigitalRegulatorOFF—30—nAIStandbyRegistervaluesmaintainedandRCoscillator/WUTOFF—40—nAISleepRCRCOscillator/WUTONandallregistervaluesmaintained,andallotherblocksOFF—740—nAISleepXOSleepcurrentusinganexternal32kHzcrystal.—1.7—µAISensor-LBDLowbatterydetectorON,registervaluesmaintained,andallotherblocksOFF—1—µAIReadyCrystalOscillatorandMainDigitalRegulatorON,allotherblocksOFF—1.8—mAPreambleSenseModeCurrentIpsmDutycyclingduringpreamblesearch,1.2kbps,4bytepreamble—6—mAIpsmFixed1swakeupinterval,50kbps,5bytepreamble—10—µATUNEModeCurrentITune_RXRXTune—7.6—mAITune_TXTXTune—7.8—mARXModeCurrentIRXH—13.7—mATXModeCurrent(Si4438)ITX_+20+20dBmoutputpower,class-Ematch,490MHz,3.3V—75—mA*Note:Allminimumandmaximumvaluesareguaranteedacrosstherecommendedoperatingconditionsofsupplyvoltageandfrom–40to+85°Cunlessotherwisestated.AlltypicalvaluesapplyatVDD=3.3Vand25°Cunlessotherwisestated.Si4438-C修订版1.05Table2.SynthesizerACElectricalCharacteristics1ParameterSymbolTestConditionMinTypMaxUnitSynthesizerFrequenc