Introduction

What is the LL-RLP-20 or LL-RXR-27 Module?

The LL-RLP-20 or LL-RXR-27 Module is a highly-integrated, low-power, bi-directional radio transceiver module. The modules are optimized for use either in the 915-MHz ISM frequency band or the 868-MHz ETSI frequency band. The modules use a Frequency Modulated Chirp (Semtech's LoRaTM modulation) to maximize range while minimizing power consumption and interference.

The LL-RLP-20 and LL-RXR-27 are essentially identical, with the exception that the LL-RXR-27 includes an onboard power amplifier in the transmit path and a low-noise amplifier in the receive path.  The maximum transmit power of the RXR-27 therefore exceeds that of the RLP-20 by approximately 6 dB.

Key Features

LL-RLP-20

  • Receiver sensitivity: -140 dBm
  • Transmit power: 60 mW / 17.5 dBm
  • TX Peak Current: 122 mA
  • RX Peak Current: 10 mA
  • Sleep current: less than 1 uA (regulated/direct), less than 10 uA (unregulated)

LL-RXR-27

  • Receiver sensitivity: -137 dBm
  • Transmit power: 250 mW / 24 dBm
  • Tx Peak Current: 480 mA
  • Rx Peak Current: 40 mA
  • Sleep current: less than 1 uA (regulated/direct), less than 10 uA (unregulated)

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