The iM891A-XL is a compact and low-cost radio module that operates in the unlicensed 868/915 MHz band and combines a powerful Cortex® M4 controller with the LoRa® transceiver of Semtech® Corporation.
iM891A-XL supports the following LoRaWAN® frequency bands: EU868, IN865 US915, AU915 and AS923 (on request)
With an integrated +22 dBm power amplifier and a sensitivity of -149 dBm, a sensational link budget of 170 dB can be reached. This makes the iM891A-XL an ideal solution for numerous applications such as IoT sensors or home-, building- and industrial- automation.
Prolink LoRaWAN® stack:
LoRaWAN® is a LPWAN protocol designed by the LoRa Alliance® to connect battery operated ‘things’ to the internet in regional, national or global networks.
LoRaWAN® network architecture is deployed in a star-of-stars topology in which gateways relay messages between end-devices and a central network server
The IMST’s ProLink LoRaWAN® firmware can be integrated into end devices to participate in public or private LoRaWAN® networks. In addition, the ProLink LoRaWAN® fw adds a proprietary device to device communication to the standard LoRaWAN® FW.
| Frequency range | ISM Band 868 MHz / 915 MHz |
| Modulation | LoRa® Spread-Spectrum / wM-Bus |
| RF output power | up to +21 dBm (50Ω pad) |
| Receiver sensitivity | -149 dBm |
| RF datarate | 0.24 to 37.5 kbps LoRa® modulation 250kbps FSK-modulation |
| RF range | up to 15000 m (line of sight) |
| Operating voltage | 1.8 V to 3.6 V |
| Current consumption | < 1.4 μA (module in sleep, RTC running) 7.2 mA (Rx) 48 mA (Tx @ 3.3 V/ +14 dBm) |
| Interfaces | UART SPI I²C RF (LoRa®) |
| IOs | Digital IOs Analog Inputs |
| Dimension (LxW) | 16.8 x 18.6 mm |
| Operating temperature | -40°C to +85°C |
