Datasheet
Table Of Contents
- 1. General Description
- 2. Electrical Characteristics
- 3. SX1272/73 Features
- 4. SX1272/73 Digital Electronics
- 4.1. The LoRaTM Modem
- 4.2. FSK/OOK Modem
- 4.2.1. Bit Rate Setting
- 4.2.2. FSK/OOK Transmission
- 4.2.3. FSK/OOK Reception
- 4.2.4. Operating Modes in FSK/OOK Mode
- 4.2.5. General Overview
- 4.2.6. Startup Times
- 4.2.7. Receiver Startup Options
- 4.2.8. Receiver Restart Methods
- 4.2.9. Top Level Sequencer
- 4.2.10. Data Processing in FSK/OOK Mode
- 4.2.11. FIFO
- 4.2.12. Digital IO Pins Mapping
- 4.2.13. Continuous Mode
- 4.2.14. Packet Mode
- 4.2.15. io-homecontrol® Compatibility Mode
- 4.3. SPI Interface
- 5. SX1272/73 Analog & RF Frontend Electronics
- 6. Description of the Registers
- 7. Application Information
- 8. Packaging Information
- 9. Revision History

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Table of contents
SX1272/73
WIRELESS, SENSING & TIMING DATASHEET
Rev. 2 - July 2014
©2014 Semtech Corporation
Figure 40. TCXO Connection .......................................................................................................................................78
Figure 41. Typical Phase Noise Performances of the Low Consumption and Low Phase Noise PLLs. ......................80
Figure 42. RF Front-end Architecture Shows the Internal PA Configuration. ...............................................................82
Figure 43. Receiver Block Diagram ..............................................................................................................................85
Figure 44. AGC Steps Definition ..................................................................................................................................86
Figure 45. Temperature Sensor Response ..................................................................................................................89
Figure 46. POR Timing Diagram ................................................................................................................................114
Figure 47. Manual Reset Timing Diagram ..................................................................................................................115
Figure 48. Listen Mode: Principle ...............................................................................................................................115
Figure 49. Listen Mode with No Preamble Received .................................................................................................116
Figure 50. Listen Mode with Preamble Received .......................................................................................................116
Figure 51. Wake On PreambleDetect State Machine .................................................................................................117
Figure 52. Listen Mode with no SyncAddress Detected .............................................................................................118
Figure 53. Listen Mode with Preamble Received and no SyncAddress .....................................................................118
Figure 54. Listen Mode with Preamble Received & Valid SyncAddress ....................................................................119
Figure 55. Wake On SyncAddress State Machine .....................................................................................................119
Figure 56. Beacon Mode Timing Diagram ..................................................................................................................121
Figure 57. Beacon Mode State Machine ....................................................................................................................121
Figure 58. Example CRC Code ..................................................................................................................................123
Figure 59. Example Temperature Reading ................................................................................................................124
Figure 60. Package Outline Drawing ..........................................................................................................................125
Figure 61. Recommended Land Pattern ....................................................................................................................126
Figure 62. Tape and Reel Information ........................................................................................................................127