Low-Cost Low-Power 2.4 GHz RF Transceiver …

1 CC2500 SWRS040 CPage1of89CC2500 Low-Cost GHzRFTransceiverApplications MHz ISM/SRD band systems Consumerelectronics Wireless game controllers Wireless audio Wireless keyboard and mouse RF enabled remote controlsProduct DescriptionTheCC2500isa Low-Cost GHz transceiverdesigned for very Low-Power wireless appli-cations. The circuit is intended for MHzISM (Industrial, Scientific andMedical) and SRD (ShortRange Device)frequency RF Transceiver is integrated witha highlyconfigurable baseband modem. The modemsupports various modulation formats and hasa configurable data rate up to extensive hardware supportfor packet handling, data buffering, bursttransmissions, clear channel assessment, linkquality indication,and main operating parameters and the 64-byte transmit/receive FIFOs ofCC2500can becontrolled via an SPI interface.

2 In a typicalsystem, theCC2500will be used together witha microcontroller and a few additional FeaturesRF Performance High sensitivity ( 104 dBm at kBaud,1% packet error rate) Low current consumption ( mA in RX,250kBaud, input well above sensitivitylimit) Programmable output power up to +1 dBm Excellent receiver selectivity and blockingperformance Programmable data rate from to 500kBaud Frequency range: 2400 MHzAnalog Features OOK, 2-FSK, GFSK, and MSK supported Suitable for frequency hopping and multi-channel systems due to a fast settlingfrequency synthesizer with 90 us settlingtime AutomaticFrequencyCompensation(AFC) can be used to align the frequencysynthesizertothereceivedcentref requency Integrated analog temperature sensorDigitalFeatures Flexiblesupportforpacketorientedsystems: On-chip support for sync worddetection, address check, flexible packetlength, and automatic CRC handling Efficient SPI interface.

3 All registers can beprogrammed with one burst transfer Digital RSSI output Programmable channel filter bandwidth ProgrammableCarrierSense(CS)indicatorCC2 500 SWRS040 CPage2of89 Programmable Preamble Quality Indicator(PQI) for improved protection against falsesync word detection in random noise Support for automatic Clear ChannelAssessment (CCA) before transmitting (forlisten-before-talk systems) Support for per-package Link QualityIndication (LQI) Optional automatic whitening and de-whitening of dataLow-Power Features 400nASLEEP mode current consumption Fast startup time: 240us fromSLEEPtoRX or TX mode (measured on EM design) Wake-on-radio functionality for automaticlow-power RX polling Separate 64-byte RX and TX data FIFOs(enables burst mode data transmission)General Few external components: Complete on-chip frequency synthesizer, no externalfilters or RF switch needed Green package.

4 RoHS compliant and noantimony or bromine Small size (QLP 4x4 mm package, 20pins) Suited for systems compliant with EN 300328 and EN 300 440 class 2 (Europe),FCC CFR47 Part 15 (US), and ARIB STD-T66 (Japan) Supportforasynchronousandsynchronous serial receive/transmit modefor backwards compatibility with existingradio communication protocolsCC2500 SWRS040 CPage3of89 AbbreviationsAbbreviations used in this data sheet are described Channel PowerMSBMost Significant BitADCA nalog to Digital ConverterMSKM inimum Shift KeyingAFCA utomatic Frequency Offset CompensationNANot ApplicableAGCA utomatic Gain ControlNRZNon Return to Zero (Coding)

5 AMRA utomatic Meter ReadingOOKOn Off KeyingARIBA ssociation of Radio Industries and BusinessesPAPower AmplifierBERBit Error RatePCBP rinted Circuit BoardBTBandwidth-Time productPDPower DownCCAC lear Channel AssessmentPERP acket Error RateCFRCode of Federal RegulationsPLLP hase Locked LoopCRCC yclic Redundancy CheckPORP ower-on ResetCSCarrier SensePQIP reamble Quality IndicatorCWContinuous Wave (Unmodulated Carrier)PQTP reamble Quality ThresholdDCDirect CurrentRCOSCRC OscillatorDVGAD igital Variable Gain AmplifierQPSKQ uadrature Phase Shift KeyingESRE quivalent Series ResistanceQLPQuad Leadless PackageFCCF ederal Communications CommissionRCResistor-CapacitorFECF orward Error CorrectionRFRadio FrequencyFIFOF irst-In-First-OutRSSIR eceived Signal Strength IndicatorFHSSF requency Hopping Spread SpectrumRXReceive.

6 Receive Mode2-FSKF requency Shift KeyingSMDS urface Mount DeviceGFSKG aussian shaped Frequency Shift KeyingSNRS ignal to Noise RatioIFIntermediate FrequencySPIS erial Peripheral InterfaceI/QIn-Phase/QuadratureSRDS hort Range DeviceISMI ndustrial, Scientific and MedicalT/RTransmit/ReceiveLBTL isten Before TransmitTXTransmit, Transmit ModeLCInductor-CapacitorVCOV oltage Controlled OscillatorLNALow Noise AmplifierWLANW ireless Local Area NetworksLOLocal OscillatorWORWake on Radio, Low power pollingLQILink Quality IndicatorXOSCC rystal OscillatorLSBL east Significant BitXTALC rystalMCUM icrocontroller UnitCC2500 SWRS040 CPage4of89 Tableof OF ,SYMBOLSYNCHRONIZER (PQT).

7 (CS).. (CCA).. (LQI)..3718 FORWARDERRORCORRECTION (FEC).. (WOR).. REGISTERS WITHPRESERVEDVALUES REGISTERS THATLOSEPROGRAMMING (QFN20).. FORPACKAGE(QFN20).. Maximum RatingsUnder no circumstances must the absolute maximum ratings given inTable1be violated. Stressexceeding one or more of the limiting values may cause permanent damage to the ! should be used when handlingthe device in order to prevent voltage supply pins must have the same voltageVoltage on any digital pin + ,max on the pins RF_P, RF_Nand DCOUPL ramp-uprate120kV/ sInput RF level+10dBmStorage temperature range 50150 CSolder reflow temperature260 CAccording to IPC/JEDEC J-STD-020 DESD<500 VAccording to JEDEC STD 22, method A114,Human Body ModelTable1.

8 AbsoluteMaximumRatings2 Operating ConditionsTheCC2500operating conditions are temperature 4085 COperating supply supply pins must have the same voltageTable2: OperatingConditions3 General CharacteristicsParameterMinTypMaxUnitCon dition/NoteFrequency will be spurious signals at n/2 crystal oscillatorfrequency (n is an integer number). RF frequencies atn/2 crystal oscillator frequency should therefore beavoided( 2405, 2418, 2431, 2444, 2457, 2470 and2483 MHz when using a 26 MHz crystal).Data and OOK(Shaped) MSK (also known as differential offsetQPSK)Optional Manchester encoding (the data rate in kbpswill be half the baudrate).

9 Table3: GeneralCharacteristicsCC2500 SWRS040 CPage7of894 Electrical ConsumptionTc = 25 C, VDD = V if nothing else stated. All measurement results obtainedusing the CC2500EM reference design([4]).ParameterMinTypMaxUnitCondit ion/Note400nAVoltage regulator to digital part off, register values retained(SLEEP state). AllGDOpins programmed to 0x2F (HW to 0)900nAVoltage regulator to digital part off, register values retained, Low-Power RC oscillator running (SLEEP state with WOR enabled)92 AVoltage regulator to digital part off, register values retained,XOSC running (SLEEP state )Current consumption inpower down modes160 AVoltage regulator to digital part on, all other modules in powerdown (XOFF state)

10 AAutomatic RX polling once each second, using Low-Power RCoscillator, with 460 kHz filter bandwidth and 250kBauddata rate,PLL calibration every 4thwakeup. Average current with signal inchannel below carrier sense level( ).35 ASame as above, but with signal in channelabovecarrier senselevel, RX timeout, and no preamble/sync word AAutomatic RX polling every 15thsecond, using Low-Power RCoscillator, with 460 kHz filter bandwidth and 250kBauddata rate,PLL calibration every 4thwakeup. Average current with signal inchannel below carrier sense level( ).