Single-Chip Low Cost Low Power RF-Transceiver (Rev. A)

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CC2500easily found using the SmartRF ® Studiosoftware. Suggested values are listed in Table15. The balun and LC filter component valuesand their placement are important to keep theperformance optimized. It is highlyrecommended to follow the CC2500EMreference design.CrystalThe crystal oscillator uses an external crystalwith two loading capacitors (C81 and C101).See Section 26 on page 45 for details.Power supply decouplingThe power supply must be properly decoupledclose to the supply pins. Note that decouplingcapacitors are not shown in the applicationcircuit. The placement and the size of thedecoupling capacitors are very important toachieve the optimum performance. TheCC2500EM reference design should befollowed closely.ComponentC51C81/C101C121/C131C122/C132C123/C124L121/L131L122R171XTALDescriptionDecoupling capacitor for on-chip voltage regulator to digital partCrystal loading capacitors, see Section 26 on page 45 for detailsRF balun DC blocking capacitorsRF balun/matching capacitorsRF LC filter/matching capacitorsRF balun/matching inductors (inexpensive multi-layer type)RF LC filter inductor (inexpensive multi-layer type)Resistor for internal bias current reference26-27 MHz crystal, see Section 26 on page 45 for detailsTable 14: Overview of external components (excluding supply decoupling capacitors)1.8V-3.6V power supplyR171SIDigital IntefaceSCLKSO(GDO1)GDO2(optional)C511 SCLKSI 20GND 19DGUARD 18RBIAS 17GND 162 SO (GDO1)AVDD 143 GDO24 DVDD5 DCOUPLCC2500DIE ATTACH PAD:6 GDO07 CSn8 XOSC_Q19 AVDD10 XOSC_Q2AVDD 15RF_N 13RF_P 12AVDD 11L131C131 C132C121L121C122L122C123Antenna(50 Ohm)C124GDO0(optional)CSnXTALAlternative:Folded dipole PCBantenna (no externalcomponents needed)C81C101Figure 3: Typical application and evaluation circuit (excluding supply decoupling capacitors)PRELIMINARY Data Sheet (Rev.1.2) SWRS040A Page 16 of 83
CC2500Component Value ManufacturerC51 100 nF ±10%, 0402 X5R Murata GRM15 seriesC81 27 pF ±5%, 0402 NP0 Murata GRM15 seriesC101 27 pF ±5%, 0402 NP0 Murata GRM15 seriesC121 100 pF ±5%, 0402 NP0 Murata GRM15 seriesC122 1.0 pF ±0.25 pF, 0402 NP0 Murata GRM15 seriesC123 1.8 pF ±0.25 pF, 0402 NP0 Murata GRM15 seriesC124 1.5 pF ±0.25 pF, 0402 NP0 Murata GRM15 seriesC131 100 pF ±5%, 0402 NP0 Murata GRM15 seriesC132 1.0 pF ±0.25 pF, 0402 NP0 Murata GRM15 seriesL121 1.2 nH ±0.3 nH, 0402 monolithic Murata LQG15 seriesL122 1.2 nH ±0.3 nH, 0402 monolithic Murata LQG15 seriesL131 1.2 nH ±0.3 nH, 0402 monolithic Murata LQG15 seriesR171 56 kΩ ±1%, 0402 Koa RK73 seriesXTAL 26.0 MHz surface mount crystal NDK, AT-41CD2Table 15: Bill Of Materials for the application circuitIn the CC2500EM reference design shown inFigure 4, LQG15 series inductors from Muratahave been used. Measurements have beenperformed with multi-layer inductors from othermanufacturers (e.g. Würth) and themeasurement results were the same as whenusing the Murata part.The Gerber files for the CC2500EM referencedesign are available from the TI and Chipconwebsites.Figure 4: CC2500EM reference design8 Configuration OverviewCC2500 can be configured to achieve optimumperformance for many different applications.Configuration is done using the SPI interface.The following key parameters can beprogrammed:• Power-down / power up mode• Crystal oscillator power-up / power-down• Receive / transmit mode• RF channel selection• Data rate• Modulation format• RX channel filter bandwidth• RF output power• Data buffering with separate 64-bytereceive and transmit FIFOs• Packet radio hardware support• Forward Error Correction with interleaving• Data Whitening• Wake-On-Radio (WOR)Details of each configuration register can befound in Section 31, starting on page 51.Figure 5 shows a simplified state diagram thatexplains the main CC2500 states, together withtypical usage and current consumption. Fordetailed information on controlling the CC2500state machine, and a complete state diagram,see Section 19, starting on page 35.PRELIMINARY Data Sheet (Rev.1.2) SWRS040A Page 17 of 83
Page 1 and 2: CC2500CC2500Single Chip Low Cost Lo
Page 3 and 4: CC2500Table of ContentsAPPLICATIONS
Page 5 and 6: CC250033 ORDERING INFORMATION......
Page 7 and 8: CC25004 Electrical Specifications4.
Page 9 and 10: CC2500Parameter Min Typ Max Unit Co
Page 11 and 12: CC25004.5 Low Power RC OscillatorTc
Page 13 and 14: CC25005 Pin ConfigurationSIGNDDGUAR
Page 15: CC25006 Circuit DescriptionRADIO CO
Page 19 and 20: CC2500Figure 6: SmartRF ® Studio u
Page 21 and 22: CC250010.1 Chip Status ByteWhen the
Page 23 and 24: CC250010.6 PATABLE AccessThe 0x3E a
Page 25 and 26: CC2500MDMCFG4.MDMCFG4.CHANBW_ECHANB
Page 27 and 28: CC2500Figure 10: Data whitening in
Page 29 and 30: CC250015.3 Packet Filtering in Rece
Page 31 and 32: CC2500Phase shifts are performed wi
Page 33 and 34: CC2500Carrier Sense (CS) can be use
Page 35 and 36: CC25001) Storing codeddata2) Transm
Page 37 and 38: CC2500If the XOSC is forced on, the
Page 39 and 40: CC2500The programmable conditions a
Page 41 and 42: CC2500fcarrier=f2CHANSPC _ E−( FR
Page 43 and 44: CC2500Output power,typical, +25°C,
Page 45 and 46: CC25003530252015Selectivity [dB]105
Page 47 and 48: CC2500GDOx_CFG[5:0]] Description0 (
Page 49 and 50: CC250030.2 Frequency Hopping and Mu
Page 51 and 52: CC250031 Configuration RegistersThe
Page 53 and 54: CC2500Address Register Description
Page 55 and 56: CC250031.1 Configuration Register D
Page 57 and 58: CC25000x07: PKTCTRL1 - Packet autom
Page 59 and 60: CC25000x0B: FSCTRL1 - Frequency syn
Page 61 and 62: CC25000x12: MDMCFG2 - Modem configu
Page 63 and 64: CC25000x15: DEVIATN - Modem deviati
Page 65 and 66: CC25000x17: MCSM1 - Main Radio Cont
Page 67 and 68:
CC25000x19: FOCCFG - Frequency Offs
Page 69 and 70:
CC25000x1B: AGCCTRL2 - AGC controlB
Page 71 and 72:
CC25000x1D: AGCCTRL0 - AGC controlB
Page 73 and 74:
CC25000x22: FREND0 - Front end TX c
Page 75 and 76:
CC25000x2C: TEST2 - Various test se
Page 77 and 78:
CC25000x36 (0xF6): WORTIME1 - High
Page 79 and 80:
CC250032.1 Recommended PCB layout f
Page 81 and 82:
CC250034.2 Product Status Definitio
Page 83 and 84:
CC2500AsiaPhone International +886-
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Single-Chip Low Cost Low Power RF-Transceiver (Rev. A)

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