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Wireless RF
LoRa Transceivers

Semtech SX1272

Long Range, Low Power RF Transceiver 860-1000MHz with LoRa® Technology

The SX1272/73 transceivers feature the LoRa® long range modem that provides ultra-long range spread spectrum communication and high interference immunity whilst minimising current consumption.

Using Semtech’s patented LoRa 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. LoRa 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.

Overview

Features

  • LoRa 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, LoRa 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

Packaging

  • QFN 28

Order Codes

  • SX1272IMLTRT - Pb-free, Halogen free, RoHS/WEEE compliant product
  • SX1273IMLTRT-  Pb-free, Halogen free, RoHS/WEEE compliant product
  • SX1272DVK1BAS (868MHz): Starter Kit
  • SX1272DVK1CAS (915MHz): Starter Kit
  • SX1272RF1BAS (868MHz): Starter Kit
  • SX1272RF1CAS (915MHz): Starter Kit

Block Diagram

Click diagram to enlarge

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