无线芯片cc1201资料

CC1201 ZHCSBX5–OCTOBER2013低功耗、高性能射频(RF)收发器查询样片:CC12011介绍•低流耗：1.1特性–针对自动低功耗接收轮询的增强型无线唤醒•RF性能和模拟特性：(eWOR)–高性能、单芯片收发器–断电：0.3μA（eWOR定时器激活时为0.5μA）•出色的接收器灵敏度：•RX：在RX嗅探模式中为0.5mA – 1.2kbps时为-120dBm•RX：在低功耗模式中峰值电流为19mA–50kbps时为-109dBm•RX：在高性能模式中，峰值电流为23mA •阻断性能：10MHz时为85dB•TX:+14dBm时为46mA•邻道选择性：50kHz偏移时高达62dB•其他：•极低相位噪声：10kHz(169MHz)偏移时为-–数据先入先出(FIFO)：独立的128字节RX和114dBc/Hz TX–步长为0.4dB，高达+16dBm的可编程输出功率–支持与CC1190无缝集成以实现范围扩展，从而–自动输出功率递增使敏感度提升3dB和高达+27dBm的输出功率–所支持的调制格式：2-FSK，2-GFSK，4-FSK，4-GFSK，MSK，OOK–发送和接收时支持高达1.25Mbps的数据速率1.2应用范围•数据速率高达1250kbps的低功耗、高性能、无线•无线警报和安全系统系统•工业用监控和控制•ISM/SRD频带：169，433，868，915和•无线医疗应用920MHz•无线传感器网络和有源射频识别(RFID)•有可能支持额外的频率频带：137至•IEEE802.15.4g应用158.3MHz，205至237.5MHz，以及274至316.6MHz•智能仪表计量（自动抄表(AMR)和自动计量设施(AMI)）•家庭和楼宇自动化1.3说明CC1201是一款全集成单芯片射频收发器，此器件设计用于在成本有效无线系统中实现极低功耗和低压运行的高性能。

所有滤波器都已集成，因此无需昂贵的外部SAW和IF滤波器。

该器件主要用于ISM（工业、科学和医疗）以及处于164-190MHz，410-475MHz和820-950MHz的SRD（短程设备）频带。

CC1201器件提供扩展硬件，以支持数据包处理、数据缓冲、突发传输、空闲信道评估、链路质量指示和无线唤醒。

CC1201器件的主要运行参数可由SPI接口控制。

在典型系统中，CC1201器件将与微控制器和极少的外部无源组件配合使用。

对于50kHz或更高的信道滤波带宽，CC1201提供与CC1200同样的性能，因此为无需窄带支持的应用提供一个更低成本选择。

图1-1显示CC1201器件的引脚名称和位置。

Please be aware that an important notice concerning availability,standard warranty,and use in critical applications ofTexas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.SmartRF is a trademark of Texas Instruments.PA (optional bit clock)(optional low jitter serial data output for legacy protocols)XOSC_Q1(optional 40 kHzclock input)CSn (chip select)SI (serial input)SO (serial output)(optional auto detected external XOSC /TCXO)CC1201ZHCSBX5–OCTOBER 2013图1-1.封装5mm x 5mm 四方扁平无引线(QFN)1.4方框图图1-2显示CC120x 系列器件的系统方框图。

图1-2.系统方框图CC1201 ZHCSBX5–OCTOBER20131.5其他特性•数字特性：–波形监视：针对改进的同步检测性能的高级数字信号处理–自主图像删除–安全性：硬件AES128加速器–数据先入先出(FIFO)：独立的128字节RX和TX–包括针对天线多样性支持的功能–支持重传–支持接收到的数据包自动确认–针对载波监听(LBT)系统的自动空闲信道评估(CCA)–针对增加的范围和耐用性的内置编码增益支持–数字接收到的信号强度指示(RSSI)测量–用于实现更少占用带宽的经改进OOK整形，从而在满足规定要求的同时实现更高的输出功率•针对802.15.4g的专用数据包处理:–循环冗余校验(CRC)16/32–前向纠错(FEC)，双同步检测（FEC和无FEC数据包）–数据白化•总体说明：–符合RoHS标准的5mm x5mm QFN32封装–与CC1120器件引脚兼容1.6管理规定适用于符合下列标准的系统：•欧洲:ETSI EN300220•美国：FCC CFR47第15部分•日本：ARIB STD-T108CC1201ZHCSBX5– 1介绍.........................................................1 2.1440-MHz Clock Input(TCXO).. (14)1.1特性..................................................1 2.1532-kHz Clock Input (14)1.2应用范围.............................................1 2.1640-kHz RC Oscillator. (14)1.3说明..................................................1 2.17I/O and Reset (14)1.4方框图................................................2 2.18Temperature Sensor. (14)1.5其他特性.............................................3 2.19Typical Characteristics.. (15)1.6管理规定.............................................33Device Information (18)2Device Characteristics.................................5 3.1Block Diagram.. (18)2.1Electrical Specifications..............................5 3.2Frequency Synthesizer.. (18)2.2Absolute Maximum Ratings..........................5 3.3Receiver.. (19)2.3General Characteristics..............................5 3.4Transmitter.. (19)2.4RF Characteristics...................................5 3.5Radio Control and User Interface (19)2.5Regulatory Standards................................6 3.6Enhanced Wake-On-Radio(eWOR) (19)2.6Current Consumption,Static Modes.................6 3.7RX Sniff Mode.. (20)2.7Current Consumption,Transmit Modes..............6 3.8Antenna Diversity.. (20)2.8Current Consumption,Receive Modes..............7 3.9WaveMatch.. (21)2.9Receive Parameters.................................84Device Pins (22)2.10Transmit Parameters...............................11 4.1Pin Configuration.. (22)2.11PLL Parameters....................................125Typical Application Circuit.. (23)2.12Wake-up and Timing...............................136Configuration Software. (24)2.1340-MHz Crystal Oscillator (13)CC1201 ZHCSBX5–OCTOBER2013 2Device Characteristics2.1Electrical SpecificationsAll measurements performed on CC1200EM_868_930rev.1.0.0,CC1200EM_420_470rev.1.0.1,orCC1200EM_169rev.1.2.2.2Absolute Maximum RatingsParameter Min Typ Max Unit ConditionSupply voltage(VDD)(all supply pins must have the same–0.3 3.9Vvoltage)Storage temperature range–40125°CESD2000V HBMESD500V CDMInput RF level+10dBmVDD+0.3Voltage on any digital pin–0.3Vmax3.9Voltage on any analog Pin–0.3 2.0V(including DCPL pins)2.3General CharacteristicsParameter Min Typ Max Unit ConditionVoltage supply range 2.0 3.6VTemperature range–4085°C2.4RF CharacteristicsParameter Min Typ Max Unit Condition820950MHz410475MHz164190MHzFrequency bands(274)(316.6)MHzContact TI for more information about the use of(205)(237.5)MHzthese frequency bands.(137)(158.3)MHz30Hz In820–950MHz bandFrequency resolution15Hz In410–475MHz band6Hz In164–190MHz band01250kbps Packet modeData rate0625kbps Transparent modeCC1201ZHCSBX5– 2.5Regulatory StandardsPerformance Mode Frequency Band Suitable for compliance with CommentsPerformance also suitableARIB STD-T108for systems targetingETSI EN300220receiver categories2maximum allowed output820–950MHz and3power in the respectiveFCC PART15.247bands,using a rangeFCC PART15.249extender such as theCC1190Performance also suitablefor systems targetingHigh-performance mode ETSI EN300220receiver categories2maximum allowed output410–475MHzand3power in the respectivebands,using a rangeextenderPerformance also suitablefor systems targetingmaximum allowed output164–190MHz ETSI EN300220power in the respectivebands,using a rangeextenderETSI EN300220receiver categories2and3820–950MHzFCC PART15.247FCC PART15.249Low-power modeETSI EN300220receiver categories2410–475MHzand3164–190MHz ETSI EN3002202.6Current Consumption,Static ModesT A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit Condition0.31µAPower down with retention0.5µA Low-power RC oscillator runningXOFF mode180µA Crystal oscillator/TCXO disabledIDLE mode 1.5mA Clock running,system waiting with no radio activity 2.7Current Consumption,Transmit Modes2.7.1868-,915-,and920-MHz Bands(High-Performance Mode)T A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit ConditionTX current consumption+14dBm46mATX current consumption+10dBm36mA2.7.2433-MHz Band(High-Performance Mode)T A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit ConditionTX current consumption+15dBm49mATX current consumption+14dBm46mATX current consumption+10dBm35mACC1201 ZHCSBX5–OCTOBER20132.7.3169-MHz Band(High Performance Mode)T A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit ConditionTX current consumption+15dBm54mATX current consumption+14dBm50mATX current consumption+10dBm39mA2.7.4Low-Power ModeT A=25°C,VDD=3.0V,f c=869.5MHz if nothing else statedParameter Min Typ Max Unit ConditionTX Current Consumption+10dBm33.6mA2.8Current Consumption,Receive Modes2.8.1High-Performance ModeT A=25°C,VDD=3.0V,f c=869.5MHz if nothing else statedParameter Min Typ Max Unit ConditionRX wait for sync Using RX Sniff Mode,where the receiver wakes upat regular intervals looking for an incoming packet.1.2kbps,4-byte preamble0.5mASniff mode configured to terminate on carrier38.4kbps,12-byte preamble 3.5mA sense,and is measured using RSSI_VALID_COUNT=1(0for1.2kbps),AGC_WIN_SIZE=0, 50kbps,24-byte preamble 2.1mAand SETTLE_WAIT=1.(1)RX peak currentPeak current consumption during packet reception 1.2kbps23.6mAAverage current consumption50kbps,5-byte preamble,40-kHz RC oscillator Check for data packet every1second using8µAused as eWOR timereWOR(1)See the sniff mode design note for more information(SWRA428)2.8.2Low-Power ModeT A=25°C,VDD=3.0V,f c=869.5MHz if nothing else statedParameter Min Typ Max Unit ConditionRX Peak current low-power RX mode Peak current consumption during packet receptionat the sensitivity limit50kbps19mACC1201ZHCSBX5– 2.9Receive ParametersAll RX measurements made at the antenna connector,to a bit error rate(BER)limit of1%.Selectivity and blocking is measured with the desired signal3dB above the sensitivity level.2.9.1General Receive Parameters(High-Performance Mode)T A=25°C,VDD=3.0V,f c=869.5MHz if nothing else statedParameter Min Typ Max Unit ConditionSaturation+10dBmDigital channel filter programmable501600kHzbandwidthIIP3–14dBm At maximum gain±14%With carrier sense detection enabledData rate offset tolerance±1600ppm With carrier sense detection disabledSpurious emissionsRadiated emissions measured according to ETSI1–13GHz(VCO leakage at3.5GHz)<–56dBmEN300220,f c=869.5MHz30MHz to1GHz<–57dBmOptimum source impedance868-,915-,and920-MHz bands60+j60/30+j30Ω(Differential or Single-Ended RX Configurations) 433-MHz band100+j60/50+j30Ω169-MHz band140+j40/70+j20ΩCC1201 ZHCSBX5–OCTOBER20132.9.2RX Performance in868-,915-,and920-MHz Bands(High-Performance Mode)T A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit Condition–119dBm 1.2kbps2-FSK,DEV=20kHz CHF=50kHz–113dBm 4.8kbps OOK CHF=128kHz–108dBm32.768kbps2-GFSK,DEV=50kHz CHF=208kHz Sensitivity–110dBm38.4kbps2-GFSK,DEV=20kHz CHF=104kHz–109dBm50kbps2-GFSK,DEV=25kHz,CHF=104kHz–97dBm500kbps2-GMSK,CHF=833kHz–97dBm1Mbps4-GFSK,DEV=400kHz,CHF=1.66MHz50dB±50kHz(adjacent channel)Blocking and selectivity50dB±100kHz(alternate channel)1.2-kbps2-FSK,50-kHz channelseparation,20-kHz deviation,50-kHz75dB±2MHzchannel filter80dB±10MHz38dB±200kHzBlocking and selectivity46dB±400kHz32.768-kbps2-GFSK,200-kHz channelseparation,50-kHz deviation,208-kHz66dB±2MHzchannel filter70dB±10MHz44dB+100kHz(adjacent channel)Blocking and selectivity44dB±200kHz(alternate channel)38.4-kbps2-GFSK,100-kHz channelseparation,20-kHz deviation,104-kHz64dB±2MHzchannel filter72dB±10MHz41dB±200kHz(adjacent channel)Blocking and selectivity50-kbps2-GFSK,200-kHz channel46dB±400kHz(alternate channel)separation,25-kHz deviation,104-kHz65dB±2MHzchannel filter(Same modulation format as802.15.4g Mandatory Mode)71dB±10MHz45dB±400kHz(adjacent channel)Blocking and selectivity54dB±800kHz(alternate channel)100-kbps2-GFSK,50-kHz deviation,63dB±2MHz208-kHz channel filter68dB±10MHz42dB+1MHz(adjacent channel)Blocking and selectivity42dB±2MHz(alternate channel)500-kbps GMSK,833-kHz channel filter57dB±10MHz46dB±2MHz(adjacent channel)Blocking and selectivity1-Mbps4-GFSK,400-kHz deviation,52dB±4MHz(alternate channel)1.6-MHz channel filter59dB±10MHzCC1201ZHCSBX5– 2.9.3RX Performance in433-MHz Band(High-Performance Mode)T A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit Condition1.2kbps2-FSK,DEV=20kHz–120dBmCHF=50kHzSensitivity–111dBm38.4kbps2-GFSK,DEV=20kHz CHF=104kHz56dB±50kHz(adjacent channel)Blocking and selectivity56dB±100kHz(alternate channel)1.2-kbps2-FSK,50-kHz channelseparation,20-kHz deviation,50-kHz79dB±2MHzchannel filter84dB±10MHz49dB+100kHz(adjacent channel)Blocking and selectivity48dB±200kHz(alternate channel)38.4-kbps2-GFSK,100-kHz channelseparation,20-kHz deviation,104-kHz66dB±2MHzchannel filter74dB±10MHz2.9.4RX Performance in169-MHz Band(High-Performance Mode)T A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit ConditionSensitivity–119dBm 1.2kbps2-FSK,DEV=20kHz CHF=50kHz62dB±50kHz(adjacent channel)Blocking and Selectivity62dB±100kHz(alternate channel)1.2kbps2-FSK,50kHz channelseparation,20kHz deviation,50kHz81dB±2MHzchannel filter85dB±10MHzImage rejection 1.2kbps,DEV=20kHz,CHF=50kHz,image at-67dB(Image compensation enabled)417kHz2.9.5RX Performance in Low-Power ModeT A=25°C,VDD=3.0V,f c=869.5MHz if nothing else statedParameter Min Typ Max Unit ConditionSensitivity–96dBm50kbps2-GFSK,DEV=25kHz,CHF=119kHz Blocking and selectivity41dB+200kHz(adjacent channel)50kbps2-GFSK,200-kHz channel45dB+400kHz(alternate channel)separation,25-kHz deviation,104-kHz62dB±2MHzchannel filter(Same modulation format as802.15.4g60dB±10MHzMandatory Mode)Saturation10dBm2.10Transmit ParametersT A=25°C,VDD=3.0V,f c=869.5MHz if nothing else statedParameter Min Typ Max Unit Condition+14dBm At915/920MHz+15dBm At915/920MHz with VDD=3.6V+15dBm At868MHz+16dBm At868MHz with VDD=3.6VMax output power+15dBm At433MHz+16dBm At433MHz with VDD=3.6V+15dBm At169MHz+16dBm At169MHz with VDD=3.6V–12dBm Within fine step size rangeMin output power–38dBm Within coarse step size rangeOutput power step size0.4dB Within fine step size range4-GFSK9.6kbps in12.5kHz channel,measured in Adjacent channel power–60dBc8.75kHz bandwidth(ETSI300220compliant) Spurious emissions Transmission at+14dBm(Excluding harmonics)Suitable for systems targeting compliance with ETSI 30MHz–1GHz<–57dBm EN300-220,FCC part15,ARIB STD-T108Measured in1MHz bandwidth1–12.75GHz<–50dBmHarmonicsSecond Harm,169MHz(ETSI)–43dBmThird Harm,169MHz(ETSI)–57dBmFourth Harm,169MHz(ETSI)–63dBmSecond Harm,433MHz(ETSI)–59dBmThird Harm,433MHz(ETSI)–51dBmTransmission at+14dBm(or maximum allowed in Fourth Harm,433MHz(ETSI)–63dBmapplicable band where this is less than+14dBm) Second Harm,868MHz(ETSI)–50dBm using TI reference designSuitable for systems targeting compliance with ETSI Third Harm,868MHz(ETSI)–44dBmEN300-220,FCC part15,ARIB STD-T108Fourth Harm,868MHz(ETSI)–56dBmSecond Harm,915MHz(FCC)–58dBmThird Harm,915MHz(FCC)–46dBmFourth Harm,915MHz(FCC)–62dBmSecond Harm,920MHz(ARIB)–65dBmThird Harm,920MHz(ARIB)–60dBmOptimum load impedance868-,915-,and920-MHz bands35+j35Ω433-MHz band55+j25Ω169-MHz band80+j0Ω2.11PLL Parameters2.11.1High Performance ModeT A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit Condition–94dBc/Hz±10kHz offsetPhase noise in868-,915-,and920-MHz–96dBc/Hz±100kHz offset Bands–123dBc/Hz±1MHz offset 200-kHz loop bandwidth setting–137dBc/Hz±10MHz offset–100dBc/Hz±10kHz offsetPhase noise in868-,915-,and920-MHz–102dBc/Hz±100kHz offset Bands–121dBc/Hz±1MHz offset 300-kHz loop bandwidth setting–136dBc/Hz±10MHz offset–103dBc/Hz±10kHz offsetPhase noise in868-,915-,and920-MHz–104dBc/Hz±100kHz offset Bands–119dBc/Hz±1MHz offset 400-kHz loop bandwidth setting–133dBc/Hz±10MHz offset–104dBc/Hz±10kHz offsetPhase noise in868-,915-,and920-MHz–106dBc/Hz±100kHz offset Bands–116dBc/Hz±1MHz offset 500-kHz loop bandwidth setting–130dBc/Hz±10MHz offset–106dBc/Hz±10kHz offset–107dBc/Hz±100kHz offset Phase noise in433-MHz band300-kHz loop bandwidth setting–127dBc/Hz±1MHz offset–141dBc/Hz±10MHz offset–114dBc/Hz±10kHz offset–114dBc/Hz±100kHz offset Phase noise in169-MHz band300-kHz loop bandwidth setting–132dBc/Hz±1MHz offset–142dBc/Hz±10MHz offset 2.11.2Low-Power ModeParameter Min Typ Max Unit Condition–99dBc/Hz±10kHz offsetPhase noise in868-,915-,and920-MHz–101dBc/Hz±100kHz offset bands–121dBc/Hz±1MHz offset 200-kHz loop bandwidth setting–135dBc/Hz±10MHz offset2.12Wake-up and TimingT A=25°C,VDD=3.0V,f c=869.5MHz if nothing else statedThe turnaround behavior to and from RX and/or TX is highly configurable,and the time it takes will depend on(1)See the design note on RSSI and response time.It is written for the CC112X devices,but the same principles apply for the CC1201device.2.1340-MHz Crystal OscillatorT A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit ConditionNote:It is recommended that the crystal frequencyis chosen so that the RF channel(s)are>1MHz Crystal frequency38.440MHzaway from multiples of XOSC in TX and XOSC/2inRX.Load capacitance(C L)10pFESR60ΩSimulated over operating conditionsStart-up time0.24ms Depends on crystal2.1440-MHz Clock Input(TCXO)T A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit ConditionClock frequency38.440MHzClock input amplitude(peak-to-peak)0.8VDD V Simulated over operating conditions2.1532-kHz Clock InputT A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit ConditionClock frequency32kHz32-kHz clock input pin input high voltage0.8x VDD V32-kHz clock input pin input low voltage0.2x VDD V2.1640-kHz RC OscillatorT A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit ConditionAfter calibration(frequency calibrated against the Frequency40kHz40-MHz crystal or TCXO)Relative to frequency reference(that is,40-MHz Frequency accuracy after calibration±0.1%crystal or TCXO)Initial calibration time 1.32ms2.17I/O and ResetT A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit Condition0.8xLogic input high voltage VVDD0.2xLogic input low voltage VVDD0.8xLogic output high voltage VVDDAt4-mA output load or less0.2xLogic output low voltage VVDDPower-on reset threshold 1.3V Voltage on DVDD pin2.18Temperature SensorT A=25°C,VDD=3.0V if nothing else statedParameter Min Typ Max Unit ConditionTemperature sensor range–4085°CChange in sensor output voltage versus change in Temperature coefficient 2.66mV/°CtemperatureTypical sensor output voltage at TA=25°C,VDD= Typical output voltage794mV3.0VChange in sensor output voltage versus change in VDD coefficient 1.17mV/VVDDThe CC1201device can be configured to provide a voltage proportional to temperature on GPIO1.The temperature can be estimated by measuring this voltage(see Section2.18,Temperature Sensor).For more information,see the temperature sensor design note(SWRA415).102030405060T X C u r r e n t (m A )PA power settingTX Current at 868MHz vs PA powersetting-50-40-30-20-1001020O u t p u t P o w e r (d B m )PApower settingOutput Power at 868MHz vs PA power setting1011121314151622.533.5O u t p u t P o w e r (d B m )Supply Voltage (V)Output Power vs Supply Voltage Maximum Output Power Setting (0x7F)1213141516-404080O u t p u t P o w e r (d B m )Temperature (ºC)Output Power vs Temperature Maximum Power Setting(0x7F)-20-1001020304050607080-2-1012S e l e c t i v i t y (d B )Offset Frequency (MHz)Selectivity vs Offset frequency (100kHz channels)50kbps,25kHz deviation,104kHz ch.filter bwImage frequency at -0.28MHz offset (compensation enabled)-40-20020406080-110-90-70-50-30-10R S S IInput Level (dBm)RSSI vs Input Level50kbps GFSK,25kHz deviation,104kHz ch.filter bw2.19Typical CharacteristicsTA =25°C,VDD =3.0V,f c =869.5MHz if nothing else statedFigure 2-1.Figure 2-2.Figure 2-3.Figure 2-4.Figure 2-5.Figure 2-6.Phase Noise 869.5MHz (10kHz-100MHz offset)200kHz Loop Bandwidth Phase Noise 869.5MHz (10kHz-100MHz offset)300kHz Loop Bandwidth0.20.40.60.811.21.51.71.92.12.32.52.72.9051015202530G P I O O u t p u t L o w V o l t a g e (V )G P I O O u t p u t h i g h V o l t a g e (V )Current (mA)Output High Voltage Output Low VoltageEye Diagram1Mbps 4-GFSK,400kHz deviation300kHz loop bandwidthEye Diagram1Mbps 4-GFSK,400kHz deviation500kHz loop bandwidth Figure 2-7.Figure 2-8.Figure 2-9.Figure 2-10.Figure 2-11.Figure 2-12.Phase Noise 869.5MHz (10kHz-100MHz offset)500kHz Loop BandwidthPhase Noise 869.5MHz (10kHz-100MHz offset)400kHz Loop BandwidthFigure 2-13.Figure 2-14.PA (optional bit clock)(optional low jitter serial data output for legacy protocols)XOSC_Q1XOSC_Q2(optional 40 kHzclock input)CSn (chip select)SI (serial input)SO (serial output)SCLK (serial clock)(optional GPIO3/2/0)(optional auto detected external XOSC /TCXO)3Device Information3.1Block DiagramFigure 3-1shows the system block diagram of the CC120x family of devices.Figure 3-1.System Block Diagram3.2Frequency SynthesizerAt the center of the CC1201device there is a fully integrated,fractional-N,ultra-high-performance frequency synthesizer.The frequency synthesizer is designed for excellent phase noise performance,providing very high selectivity and blocking performance.The system is designed to comply with the most stringent regulatory spectral masks at maximum transmit power.Either a crystal can be connected to XOSC_Q1and XOSC_Q2,or a TCXO can be connected to the EXT_XOSC input.The oscillator generates the reference frequency for the synthesizer,as well as clocks for the analog-to-digital converter (ADC)and the digital part.To reduce system cost,the CC1201device has high-accuracy frequency estimation and compensation registers to measure and compensate for crystal inaccuracies.This compensation enables the use of lower cost crystals.If a TCXO is used,the CC1201device automatically turns on and off the TCXO when needed to support low-power modes and Wake-On-Radio operation.3.3ReceiverThe CC1201device features a highly flexible receiver.The received RF signal is amplified by the low-noise amplifier(LNA)and is down-converted in quadrature(I/Q)to the intermediate frequency(IF).At IF, the I/Q signals are digitized by the high dynamic-range ADCs.An advanced automatic gain control(AGC)unit adjusts the front-end gain,and enables the CC1201 device to receive strong and weak signals,even in the presence of strong interferers.High-attenuation channel and data filtering enable reception with strong neighbor channel interferers.The I/Q signal is converted to a phase and magnitude signal to support the FSK and OOK modulation schemes.NOTEA novel I/Q compensation algorithm removes any problem of I/Q mismatch,thus avoidingtime-consuming and costly I/Q image calibration steps.3.4TransmitterThe CC1201transmitter is based on direct synthesis of the RF frequency(in-loop modulation).To use the spectrum effectively,the CC1201device has extensive data filtering and shaping in TX mode to support high throughput data communication in narrowband channels.The modulator also controls power ramping to remove issues such as spectral splattering when driving external high-power RF amplifiers.3.5Radio Control and User InterfaceThe CC1201digital control system is built around the main radio control(MARC),which is implemented using an internal high-performance,16-bit ultra-low-power processor.MARC handles power modes,radio sequencing,and protocol timing.A4-wire SPI serial interface is used for configuration,strobe commands,and FIFO access.The digital baseband includes support for channel configuration,packet handling,and data buffering.The host MCU can stay in sleep mode until a valid RF packet is received.This greatly reduces power consumption.When the host MCU receives a valid RF packet,it burst-reads the data.This reduces the required computing power.The CC1201radio control and user interface are based on the widely used CC1101transceiver.This relationship enables an easy transition between the two platforms.The command strobes and the main radio states are the same for the two platforms.For legacy formats,the CC1201device also supports two serial modes.•Synchronous serial mode:The CC1201device performs bit synchronization and provides the MCU with a bit clock with associated data.•Transparent mode:The CC1201device outputs the digital baseband signal using a digital interpolation filter to eliminate jitter introduced by digital filtering and demodulation.3.6Enhanced Wake-On-Radio(eWOR)eWOR,using a flexible integrated sleep timer,enables automatic receiver polling with no intervention from the MCU.When the CC1201device enters RX mode,it listens and then returns to sleep if a valid RF packet is not received.The sleep interval and duty cycle can be configured to make a trade-off between network latency and power consumption.Incoming messages are time-stamped to simplify timer re-synchronization.The eWOR timer runs off an ultra-low-power RC oscillator.To improve timing accuracy,the RC oscillator can be automatically calibrated to the RF crystal in configurable intervals.3.7RX Sniff ModeThe CC1201device supports quick start up times,and requires few preamble bits.RX Sniff Mode uses these conditions to dramatically reduce the current consumption while the receiver is waiting for data.Because the CC1201device can wake up and settle much faster than the duration of most preambles,it is not required to be in RX mode continuously while waiting for a packet to arrive.Instead,the Enhanced Wake On Radio feature can be used to put the device into sleep mode periodically.By setting an appropriate sleep time,the CC1201device can wake up and receive the packet when it arrives with no performance loss.This sequence removes the need for accurate timing synchronization between transmitter and receiver,and lets the user trade off current consumption between the transmitter and receiver.For more information,see the sniff mode design note(SWRA428).3.8Antenna DiversityAntenna diversity can increase performance in a multipath environment.An external antenna switch is required.The CC1201device uses one of the GPIO pins to automatically control the switch.This device also supports differential output control signals typically used in RF switches.If antenna diversity is enabled,the GPIO alternates between high and low states until a valid RF input signal is detected.An optional acknowledge packet can be transmitted without changing the state of the GPIO.An incoming RF signal can be validated by received signal strength or by using the automatic preamble ing the automatic preamble detector ensures a more robust system and avoids the need to set a defined signal strength threshold(such a threshold sets the sensitivity limit of the system).CC1201 ZHCSBX5–OCTOBER20133.9WaveMatchAdvanced capture logic locks onto the synchronization word and does not require preamble settling bytes.Therefore,receiver settling time is reduced to the settling time of the AGC,typically4bits.The WaveMatch feature also greatly reduces false sync triggering on noise,further reducing the power consumption and improving sensitivity and reliability.The same logic can also be used as a high-performance preamble detector to reliably detect a valid preamble in the channel.See SWRC046for more information.Figure3-2.Receiver Configurator in SmartRF StudioCopyright©2013,Texas Instruments Incorporated Device Information21Submit Documentation FeedbackProduct Folder Links:CC1201。