SX1279 Datasheet PDF ( Pinout ) - 137 MHz to 1020 MHz Low Power Long Range Transceiver

SX1279 Datasheet PDF - Semtech Corporation

Part Number	*SX1279*
Description	137 MHz to 1020 MHz Low Power Long Range Transceiver
Manufacturers	Semtech Corporation
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SX1276/77/78/79

WIRELESS, SENSING & TIMING

DATASHEET

SX1276/77/78/79 - 137 MHz to 1020 MHz Low Power Long Range Transceiver

GENERAL DESCRIPTION

The SX1276/77/78/79 transceivers feature the LoRaTM long

range modem that provides ultra-long range spread

spectrum communication and high interference immunity

whilst minimising current consumption.

Using Semtech’s patented LoRaTM modulation technique

SX1276/77/78/79 can achieve a sensitivity of over -148dBm

using a low cost crystal and bill of materials. The high

sensitivity combined with the integrated +20 dBm power

amplifier yields industry leading link budget making it

optimal for any application requiring range or robustness.

LoRaTM also provides significant advantages in both

blocking and selectivity over conventional modulation

techniques, solving the traditional design compromise

between range, interference immunity and energy

consumption.

These devices also support high performance (G)FSK

modes for systems including WMBus, IEEE802.15.4g. The

SX1276/77/78/79 deliver exceptional phase noise,

selectivity, receiver linearity and IIP3 for significantly lower

current consumption than competing devices.

ORDERING INFORMATION

Part Number

Delivery

MOQ / Multiple

SX1276IMLTRT

T&R

3000 pieces

SX1277IMLTRT

T&R

3000 pieces

SX1278IMLTRT

T&R

3000 pieces

SX1279IMLTRT

T&R

3000 pieces

 QFN 28 Package - Operating Range [-40;+85°C]

 Pb-free, Halogen free, RoHS/WEEE compliant product

KEY PRODUCT FEATURES

 LoRaTM Modem

 168 dB maximum link budget

 +20 dBm - 100 mW constant RF output vs. V supply

 +14 dBm high efficiency PA

 Programmable bit rate up to 300 kbps

 High sensitivity: down to -148 dBm

 Bullet-proof front end: IIP3 = -11 dBm

 Excellent blocking immunity

 Low RX current of 9.9 mA, 200 nA register retention

 Fully integrated synthesizer with a resolution of 61 Hz

 FSK, GFSK, MSK, GMSK, LoRaTMand OOK modulation

 Built-in bit synchronizer for clock recovery

 Preamble detection

 127 dB Dynamic Range RSSI

 Automatic RF Sense and CAD with ultra-fast AFC

 Packet engine up to 256 bytes with CRC

 Built-in temperature sensor and low battery indicator

APPLICATIONS

 Automated Meter Reading.

 Home and Building Automation.

 Wireless Alarm and Security Systems.

 Industrial Monitoring and Control

 Long range Irrigation Systems

Rev. 4 - March 2015

Page 1

www.semtech.com

SX1276/77/78/79

WIRELESS, SENSING & TIMING

Table of contents

Section

DATASHEET

Page

Table 1. SX1276/77/78/79 Device Variants and Key Parameters .................................................................................10

Table 2. Pin Description ................................................................................................................................................11

Table 3. Absolute Maximum Ratings .............................................................................................................................13

Table 4. Operating Range .............................................................................................................................................13

Table 5. Thermal Properties ..........................................................................................................................................13

Table 6. Power Consumption Specification ...................................................................................................................14

Table 7. Frequency Synthesizer Specification ..............................................................................................................14

Table 8. FSK/OOK Receiver Specification ....................................................................................................................16

Table 9. Transmitter Specification .................................................................................................................................17

Table 10. LoRa Receiver Specification .........................................................................................................................19

Table 11. Digital Specification .......................................................................................................................................22

Table 12. Example LoRaTM Modem Performances, 868MHz Band .............................................................................25

Table 13. Range of Spreading Factors ..........................................................................................................................27

Table 14. Cyclic Coding Overhead ................................................................................................................................27

Table 15. LoRa Bandwidth Options ...............................................................................................................................28

Table 16. LoRaTM Operating Mode Functionality .........................................................................................................36

Table 17. LoRa CAD Consumption Figures ..................................................................................................................45

Table 18. DIO Mapping LoRaTM Mode .........................................................................................................................46

Table 19. Bit Rate Examples .........................................................................................................................................47

Table 20. Preamble Detector Settings ...........................................................................................................................53

Table 21. RxTrigger Settings to Enable Timeout Interrupts ..........................................................................................54

Table 22. Basic Transceiver Modes ..............................................................................................................................54

Table 23. Receiver Startup Time Summary ..................................................................................................................57

Table 24. Receiver Startup Options ..............................................................................................................................60

Table 25. Sequencer States ..........................................................................................................................................61

Table 26. Sequencer Transition Options .......................................................................................................................62

Table 27. Sequencer Timer Settings .............................................................................................................................63

Table 28. Status of FIFO when Switching Between Different Modes of the Chip .........................................................67

Table 29. DIO Mapping, Continuous Mode ...................................................................................................................69

Table 30. DIO Mapping, Packet Mode ..........................................................................................................................69

Table 31. CRC Description ...........................................................................................................................................77

Table 32. Frequency Bands ..........................................................................................................................................82

Table 33. Power Amplifier Mode Selection Truth Table ................................................................................................83

Table 34. High Power Settings ......................................................................................................................................84

Table 35. Operating Range, +20dBm Operation ...........................................................................................................84

Table 36. Operating Range, +20dBm Operation ...........................................................................................................84

Table 37. Trimming of the OCP Current ........................................................................................................................85

Table 38. LNA Gain Control and Performances ............................................................................................................86

Table 39. RssiSmoothing Options .................................................................................................................................86

Rev. 4 - March 2015

Page 5

www.semtech.com

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SX1279 Datasheet PDF - Semtech Corporation

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