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SX1278 の電気的特性と機能

SX1278のメーカーはSemtech Corporationです、この部品の機能は「137 MHz to 1020 MHz Low Power Long Range Transceiver」です。


製品の詳細 ( Datasheet PDF )

部品番号 SX1278
部品説明 137 MHz to 1020 MHz Low Power Long Range Transceiver
メーカ Semtech Corporation
ロゴ Semtech Corporation ロゴ 




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SX1278 Datasheet, SX1278 PDF,ピン配置, 機能
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
©2015 Semtech Corporation
Page 1
www.semtech.com

1 Page





SX1278 pdf, ピン配列
SX1276/77/78/79
WIRELESS, SENSING & TIMING
Table of contents
Section
DATASHEET
Page
4.2.9. Data Processing in FSK/OOK Mode ......................................................................................................... 65
4.2.10. FIFO ........................................................................................................................................................66
4.2.11. Digital IO Pins Mapping ...........................................................................................................................69
4.2.12. Continuous Mode ....................................................................................................................................70
4.2.13. Packet Mode ........................................................................................................................................... 71
4.2.14. io-homecontrol® Compatibility Mode ...................................................................................................... 79
4.3. SPI Interface ..................................................................................................................................................80
5. SX1276/77/78/79 Analog & RF Frontend Electronics............................................................................................ 81
5.1. Power Supply Strategy .................................................................................................................................. 81
5.2. Low Battery Detector ..................................................................................................................................... 81
5.3. Frequency Synthesis ..................................................................................................................................... 81
5.3.1. Crystal Oscillator ....................................................................................................................................... 81
5.3.2. CLKOUT Output ........................................................................................................................................ 82
5.3.3. PLL ............................................................................................................................................................ 82
5.3.4. RC Oscillator ............................................................................................................................................. 82
5.4. Transmitter Description ..................................................................................................................................83
5.4.1. Architecture Description ............................................................................................................................ 83
5.4.2. RF Power Amplifiers.................................................................................................................................. 83
5.4.3. High Power +20 dBm Operation ............................................................................................................... 84
5.4.4. Over Current Protection ............................................................................................................................85
5.5. Receiver Description...................................................................................................................................... 85
5.5.1. Overview ................................................................................................................................................... 85
5.5.2. Receiver Enabled and Receiver Active States.......................................................................................... 85
5.5.3. Automatic Gain Control In FSK/OOK Mode .............................................................................................. 85
5.5.4. RSSI in FSK/OOK Mode ........................................................................................................................... 86
5.5.5. RSSI and SNR in LoRaTM Mode.............................................................................................................. 87
5.5.6. Channel Filter ............................................................................................................................................ 88
5.5.7. Temperature Measurement....................................................................................................................... 89
6. Description of the Registers................................................................................................................................... 90
6.1. Register Table Summary ............................................................................................................................... 90
6.2. FSK/OOK Mode Register Map .......................................................................................................................93
6.3. Band Specific Additional Registers .............................................................................................................. 106
6.4. LoRaTM Mode Register Map....................................................................................................................... 108
7. Application Information ........................................................................................................................................ 115
7.1. Crystal Resonator Specification................................................................................................................... 115
7.2. Reset of the Chip ......................................................................................................................................... 115
7.2.1. POR......................................................................................................................................................... 115
7.2.2. Manual Reset ..........................................................................................................................................116
7.3. Top Sequencer: Listen Mode Examples ...................................................................................................... 116
Rev. 4 - March 2015
©2015 Semtech Corporation
Page 3
www.semtech.com


3Pages


SX1278 電子部品, 半導体
SX1276/77/78/79
WIRELESS, SENSING & TIMING
Table of contents
Section
DATASHEET
Page
Table 40. Available RxBw Settings ................................................................................................................................88
Table 41. Registers Summary .......................................................................................................................................90
Table 42. Register Map .................................................................................................................................................93
Table 43. Low Frequency Additional Registers ...........................................................................................................106
Table 44. High Frequency Additional Registers ..........................................................................................................107
Table 45. Crystal Specification ....................................................................................................................................115
Table 46. Listen Mode with PreambleDetect Condition Settings .................................................................................118
Table 47. Listen Mode with PreambleDetect Condition Recommended DIO Mapping ...............................................118
Table 48. Listen Mode with SyncAddress Condition Settings .....................................................................................121
Table 49. Listen Mode with PreambleDetect Condition Recommended DIO Mapping ...............................................121
Table 50. Beacon Mode Settings ................................................................................................................................123
Table 51. Revision History ...........................................................................................................................................130
Rev. 4 - March 2015
©2015 Semtech Corporation
Page 6
www.semtech.com

6 Page



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