PDF SX1272 Data sheet ( Hoja de datos )

Número de pieza	SX1272
Descripción	Low Power Long Range Transceiver
Fabricantes	Semtech
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No Preview Available ! SX1272/73 WIRELESS, SENSING & TIMING DATASHEET SX1272/73 - 860 MHz to 1020 MHz Low Power Long Range Transceiver GENERAL DESCRIPTION The SX1272/73 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 SX1272/73 can achieve a sensitivity of over -137 dBm 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 SX1272/73 deliver exceptional phase noise, selectivity, receiver linearity and IIP3 for significantly lower current consumption than competing devices. ORDERING INFORMATION Part Number SX1272IMLTRT SX1273IMLTRT Delivery T&R T&R MOQ / Multiple 3000 pieces 3000 pieces  QFN 28 Package - Operating Range from -40 to +85°C  Pb-free, Halogen free, RoHS/WEEE compliant product KEY PRODUCT FEATURES  LoRaTM Modem  157 dB maximum link budget  +20 dBm at 100 mW constant RF output vs. V supply  +14 dBm high efficiency PA  Programmable bit rate up to 300 kbps  High sensitivity: down to -137 dBm  Bullet-proof front end: IIP3 = -12.5 dBm  89 dB blocking immunity  Low RX current of 10 mA, 100 nA register retention  Fully integrated synthesizer with a resolution of 61 Hz  FSK, GFSK, MSK, GMSK, LoRaTM and 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. 3 - March 2015 ©2015 Semtech Corporation Page 1 www.semtech.com 1 page WIRELESS, SENSING & TIMING Table of contents Section SX1272/73 DATASHEET Page 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 7.3.1. Wake on Preamble Interrupt ................................................................................................................... 116 7.3.1.1. Timing Diagram ............................................................................................................................... 117 7.3.1.2. Sequencer Configuration ................................................................................................................118 7.3.2. Wake on SyncAddress Interrupt ..............................................................................................................119 7.3.2.1. Timing Diagram ............................................................................................................................... 119 7.3.2.2. Sequencer Configuration ................................................................................................................ 120 7.4. Top Sequencer: Beacon Mode ....................................................................................................................122 7.4.1. Timing diagram........................................................................................................................................ 122 7.4.2. Sequencer Configuration......................................................................................................................... 122 7.5. Example CRC Calculation ...........................................................................................................................124 7.6. Example Temperature Reading ...................................................................................................................125 8. Packaging Information ......................................................................................................................................... 126 8.1. Package Outline Drawing ............................................................................................................................ 126 8.2. Recommended Land Pattern ....................................................................................................................... 127 8.3. Tape and Reel Information ..........................................................................................................................128 9. Revision History................................................................................................................................................... 129 Rev. 3 - March 2015 ©2015 Semtech Corporation Page 5 www.semtech.com 5 Page WIRELESS, SENSING & TIMING SX1272/73 DATASHEET 1.2. Product Versions The features of the two product variants SX1272 and SX1273 are detailed in the following table. Table 1 SX1272/73 Device Variants and Key Parameters Part Number SX1272 SX1273 Frequency Range 860 - 1020 MHz 860 - 1020 MHz Spreading Factor 6 - 12 6-9 LoRaTM Parameters Bandwidth Effective Bitrate 125 - 500 kHz 0.24 - 37.5 kbps 125 - 500 kHz 1.7 - 37.5 kbps Sensitivity -117 to -137 dBm -117 to -130 dBm 1.3. Pin Diagram The following diagram shows the pin arrangement of the QFN package, top view. Figure 2. Pin Diagram Rev. 3 - March 2015 ©2015 Semtech Corporation Page 11 www.semtech.com 11 Page

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