SX1276 Просмотр технического описания (PDF) - Semtech Corporation

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Компоненты Описание

производитель

SX1276

137 MHz to 1020 MHz Low Power Long Range Transceiver

Semtech Corporation 

SX1276/77/78/79

WIRELESS, SENSING & TIMING

Table of contents

Section

DATASHEET

Page

1. General Description ................................................................................................................................................. 9

1.1. Simplified Block Diagram ................................................................................................................................. 9

1.2. Product Versions ............................................................................................................................................10

1.3. Pin Diagram ................................................................................................................................................... 10

1.4. Pin Description ...............................................................................................................................................11

1.5. Package Marking ...........................................................................................................................................12

2. Electrical Characteristics ....................................................................................................................................... 13

2.1. ESD Notice .................................................................................................................................................... 13

2.2. Absolute Maximum Ratings ........................................................................................................................... 13

2.3. Operating Range............................................................................................................................................ 13

2.4. Thermal Properties ........................................................................................................................................ 13

2.5. Chip Specification ..........................................................................................................................................14

2.5.1. Power Consumption .................................................................................................................................. 14

2.5.2. Frequency Synthesis................................................................................................................................. 14

2.5.3. FSK/OOK Mode Receiver .........................................................................................................................16

2.5.4. FSK/OOK Mode Transmitter ..................................................................................................................... 17

2.5.5. Electrical Specification for LoRaTM Modulation ........................................................................................19

2.5.6. Digital Specification ...................................................................................................................................22

3. SX1276/77/78/79 Features.................................................................................................................................... 23

3.1. LoRaTM Modem ............................................................................................................................................ 24

3.2. FSK/OOK Modem .......................................................................................................................................... 24

4. SX1276/77/78/79 Digital Electronics ..................................................................................................................... 25

4.1. The LoRaTM Modem ..................................................................................................................................... 25

4.1.1. Link Design Using the LoRaTM Modem ....................................................................................................26

4.1.2. LoRaTM Digital Interface ...........................................................................................................................34

4.1.3. Operation of the LoRaTM Modem............................................................................................................. 36

4.1.4. Frequency Settings ...................................................................................................................................37

4.1.5. Frequency Error Indication ........................................................................................................................ 37

4.1.6. LoRaTM Modem State Machine Sequences .............................................................................................38

4.1.7. Modem Status Indicators........................................................................................................................... 46

4.2. FSK/OOK Modem .......................................................................................................................................... 46

4.2.1. Bit Rate Setting ......................................................................................................................................... 46

4.2.2. FSK/OOK Transmission ............................................................................................................................ 47

4.2.3. FSK/OOK Reception ................................................................................................................................. 48

4.2.4. Operating Modes in FSK/OOK Mode ........................................................................................................ 54

4.2.5. Startup Times ............................................................................................................................................56

4.2.6. Receiver Startup Options .......................................................................................................................... 59

4.2.7. Receiver Restart Methods......................................................................................................................... 60

4.2.8. Top Level Sequencer ................................................................................................................................ 61

Rev. 4 - March 2015

©2015 Semtech Corporation

Page 2

www.semtech.com

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