Datasheet

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Table of contents
SX1272/73
WIRELESS, SENSING & TIMING DATASHEET
Rev. 2 - July 2014
©2014 Semtech Corporation
Table 1. SX1272/73 Device Variants and Key Parameters ...........................................................................................11
Table 2. Pin Description ................................................................................................................................................12
Table 3. Absolute Maximum Ratings .............................................................................................................................14
Table 4. Operating Range .............................................................................................................................................14
Table 5. Operating Range .............................................................................................................................................14
Table 6. Power Consumption Specification ...................................................................................................................15
Table 7. Frequency Synthesizer Specification ..............................................................................................................15
Table 8. Receiver Specification .....................................................................................................................................16
Table 9. Transmitter Specification .................................................................................................................................17
Table 10. Electrical specifications: LoraTM mode .........................................................................................................18
Table 11. Digital Specification .......................................................................................................................................20
Table 12. Example LoRaTM Modem Performances .....................................................................................................23
Table 13. Range of Spreading Factors ..........................................................................................................................25
Table 14. Cyclic Coding Overhead ................................................................................................................................25
Table 15. LoRaTM Operating Mode Functionality .........................................................................................................33
Table 16. LoRa CAD Consumption Figures ..................................................................................................................42
Table 17. DIO Mapping LoRaTM Mode .........................................................................................................................42
Table 18. Bit Rate Examples .........................................................................................................................................43
Table 19. Preamble Detector Settings ...........................................................................................................................49
Table 20. RxTrigger Settings to Enable Timeout Interrupts ..........................................................................................50
Table 21. Basic Transceiver Modes ..............................................................................................................................50
Table 22. Receiver Startup Time Summary ..................................................................................................................52
Table 23. Receiver Startup Options ..............................................................................................................................55
Table 24. Sequencer States ..........................................................................................................................................56
Table 25. Sequencer Transition Options .......................................................................................................................57
Table 26. Sequencer Timer Settings .............................................................................................................................59
Table 27. Status of FIFO when Switching Between Different Modes of the Chip .........................................................63
Table 28. DIO Mapping, Continuous Mode ...................................................................................................................65
Table 29. DIO Mapping, Packet Mode ..........................................................................................................................65
Table 30. CRC Description ...........................................................................................................................................73
Table 31. Power Amplifier Mode Selection Truth Table ................................................................................................82
Table 32. High Power Settings ......................................................................................................................................83
Table 33. Operating Range, +20 dBm Operation ..........................................................................................................83
Table 34. Operating Range, +20 dBm Operation ..........................................................................................................83
Table 35. Trimming of the OCP Current ........................................................................................................................84
Table 36. LNA Gain Control and Performances ............................................................................................................85
Table 37. RssiSmoothing Options .................................................................................................................................87
Table 38. Available RxBw Settings ................................................................................................................................88
Table 39. Registers Summary .......................................................................................................................................90