Receive Section | Texas Instruments 3138 155 232931 manual

						CC2420
6.3	Receive Section

Parameter		Min.	Typ.	Max.	Unit	Condition / Note
Receiver Sensitivity
		-90	-95		dBm	PER = 1%, as specified by [1]
						Measured in a 50Ω single-ended
						load through a balun.
						[1] requires –85 dBm

Saturation (maximum input level)		0	10		dBm	PER = 1%, as specified by [1]
						Measured in a 50Ω single–ended
						load through a balun.
						[1] requires –20 dBm

Adjacent channel rejection						Wanted signal @ -82 dBm,
+ 5 MHz channel spacing			45		dB	adjacent modulated channel at
+ 5 MHz channel spacing			45		dB	+5 MHz, PER = 1 %, as specified
						+5 MHz, PER = 1 %, as specified
						by [1].
						[1] requires 0 dB
Adjacent channel rejection						Wanted signal @ -82 dBm,
- 5 MHz channel spacing			30		dB	adjacent modulated channel at
- 5 MHz channel spacing			30		dB	-5 MHz, PER = 1 %, as specified
						-5 MHz, PER = 1 %, as specified
						by [1].
						[1] requires 0 dB

Alternate channel rejection						Wanted signal @ -82 dBm,
+ 10 MHz channel spacing			54		dB	adjacent modulated channel at
+ 10 MHz channel spacing			54		dB	+10 MHz, PER = 1 %, as
						+10 MHz, PER = 1 %, as
						specified by [1]
						[1] requires 30 dB
Alternate channel rejection						Wanted signal @ -82 dBm,
- 10 MHz channel spacing			53		dB	adjacent modulated channel at
- 10 MHz channel spacing			53		dB	-10 MHz, PER = 1 %, as
						-10 MHz, PER = 1 %, as
						specified by [1]
						[1] requires 30 dB

Channel rejection						Wanted signal @ -82 dBm.
≥ + 15 MHz			62		dB	Undesired signal is an IEEE
≥ + 15 MHz			62		dB	802.15.4 modulated channel,
						802.15.4 modulated channel,
≤ - 15 MHz			62		dB	stepped through all channels
≤ - 15 MHz			62		dB	from 2405 to 2480 MHz. Signal
						from 2405 to 2480 MHz. Signal
						level for PER = 1%.

Co-channel rejection						Wanted signal @ -82 dBm.
			-3		dB	Undesired signal is an IEEE
			-3		dB	802.15.4 modulated at the same
						802.15.4 modulated at the same
						frequency as the desired signal.
						Signal level for PER = 1%.

Blocking / Desensitisation
+/- 5 MHz from band edge			-28		dBm	Wanted signal 3 dB above the
+/- 20 MHz from band edge			-28		dBm	sensitivity level, CW jammer,
+/- 30 MHz from band edge			-27		dBm	PER = 1%. Complies with EN
+/- 50 MHz from band edge			-28		dBm	300 440 class 2.

Spurious emission
30 – 1000 MHz			-73		dBm	Conducted measurement in a 50
1 – 12.75 GHz			-58		dBm	Ω single ended load. Measured
						according to EN 300 328, EN 300
						440 class 2, FCC CFR47, Part 15
						and ARIB STD-T-66

SWRS041B

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Texas Instruments 3138 155 232931 manual Receive Section

Contents

Applications Key FeaturesProduct Description Table of contents RF Data Buffering Ordering Information General Information Abbreviations ITU-T References Features Parameter Min Max Units Condition Absolute Maximum RatingsOperating Conditions Parameter Min Typ Max Units Condition Transmit Section Electrical SpecificationsOverall Parameter Min Typ Max Unit Condition / Note Receive Section If Section Rssi / Carrier SenseFrequency Synthesizer Section Digital Inputs/Outputs VDD Power Supply Battery MonitorVoltage Regulator CC2420 Pin Assignment Pin Pin Name Pin type Pin Description Avddadc CC2420 simplified block diagram Circuit Description CC2420 Input / output matching Power supply decoupling and filteringApplication Circuit Bias resistor Overview of external components Description Transceiver Transceiver Bill of materials for the application circuits Symbol Chip sequence C0, C1, C2, … , C31 Ieee 802.15.4 Modulation Format Configuration Overview Phase Evaluation Software SmartRF Studio user interface Pin configuration 13 4-wire Serial Configuration and Data InterfaceRegister access SPI timing specification Status byte Parameter Symbol Min Max Units Conditions RAM access Configuration registers write and read operations via SPI Multiple SPI access CC2420 RAM Memory Space Fifo accessAddress Byte Ordering Name Description Configuration interface Microcontroller Interface and Pin Description Receive mode Rxfifo overflow Pin activity examples during receive Demodulator, Symbol Synchroniser and Data Decision Demodulator Simplified Block Diagram Frame Format Transmitted Synchronisation Header Length field MAC protocol data unit Format of the Frame Control Field FCF Frame check sequence Buffered receive mode Buffered transmit modeRF Data Buffering Unbuffered, serial mode Fifop Address Recognition Acknowledge Frames Acknowledge frame format Radio control state machine Radio control states Nonce / counter MAC Security Operations Encryption and AuthenticationKeys Ieee 802.15.4 Nonce CC2420 Security Flag Byte Stand-alone encryption In-line security operations CBC-MAC CTR mode encryption / decryption21.7 CCM Rssi / Energy Detection Linear if and AGC SettingsMode LMIC Time Timing Value Link Quality IndicationRF Level dBm Clear Channel Assessment Frequency and Channel Programming Voltage Regulator Output Power ProgrammingVCO and PLL Self-Calibration 27.1 VCO Battery Monitor Voltage regulator, simplified schematic Crystal Oscillator Crystal oscillator component values Input / Output MatchingTransmitter Test Modes Unmodulated carrier CC2420 Modulated spectrum plot System Considerations and Guidelines Low-cost systems Battery operated systemsBER / PER measurements PCB Layout Recommendations Antenna Considerations CC2420 Configuration Registers Address Register Register type Description Configuration registers overview Saes Main 0x10 Main Control Register Bit Field Name ResetXOSC16MBYPASS Reservedframemode Pancoordinator Adrdecode MDMCTRL0 0x11 Modem Control RegisterCCAHYST20 CCAMODE10 Autocrc Autoack Preamblelength CORRTHR40 Demodavgmode Modulationmode MDMCTRL1 0x12- Modem Control RegisterRssi 0x13 Rssi and CCA Status and Control Register RSSIVAL70 Syncword 0x14 Sync Word Txctrl 0x15 Transmit Control Register RXCTRL0 0x16 Receive control register RXMIXBUFCUR10 RXCTRL1 0x17 Receive control register Fsctrl 0x18 Frequency Synthesizer Control and Status Caldone Calrunning Locklength Lockstatus SECCTRL0 0x19 Security Control Register SECMODE10 Sectxl Secrxl Battmon 0x1B Battery Monitor Control registerSECCTRL1 0x1A Security Control Register Battmonok Battmonen Battmonvoltage Manfidl 0x1E Manufacturer ID, Lower 16 Bit IOCFG0 0x1C I/O Configuration RegisterIOCFG1 0x1D I/O Configuration Register HSSDSRC20 SFDMUX40 CCAMUX40 Manfidh 0x1F Manufacturer ID, Upper 16 Bit Fsmtc 0x20 Finite state machine time constants Manand 0x21 Manual signal and override register1 Isused = is * Isandmask + Isormask Vgagainoe Manor 0x22 Manual signal or override registerAgcctrl 0x23 AGC Control Lnamixgainmodeo AGCTST1 0x25 AGC Test Register AGCTST0 0x24 AGC Test RegisterAGCTST2 0x26 AGC Test Register FSTST1 0x28 Frequency Synthesizer Test Register FSTST0 0x27 Frequency Synthesizer Test RegisterFSTST2 0x29 Frequency Synthesizer Test Register Rxbpftst 0x2B Receiver Bandpass Filters Test Register FSTST3 0x2A Frequency Synthesizer Test RegisterFsmstate 0x2C Finite state machine information Adctst 0x2D ADC Test Register AdcclockdisableDactst 0x2E DAC Test Register Txfifo 0x3E Transmit Fifo Byte register Oscillator must be running for accessing the RxfifoToptst 0x2F Top Level Test Register Rxfifo 0x3F Receive Fifo Byte register CCA test signal select table Test Output SignalsSignal output on CCA pin Description SFD test signal select table Signal output on SFD pin Description Package Description QLP Quad Leadless Package QLP Soldering information Recommended layout for package QLPPackage thermal properties Thermal resistance Tube Specification 40.3 Plastic tube specification40.4 Carrier tape and reel specification Tape and Reel Specification 42.1 Document History General InformationRevision Date Description/Changes Data Sheet Identification Product Status Definition Product Status Definitions TI Worldwide Technical Support Internet Address InformationProduct Information Centers 2007, Texas Instruments. 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