Low-cost RF module 868 MHz external antenna

Low-cost OEM radio module
868 MHz SRD frequency band
Range up to 700 m line of sight
Small form factor: 16 x 27 x 3.5 mm
Low-power functions (Wake-On-Radio)
Software stack with comprehensive functions
Addressing: max. 255 nodes in 255 networks
Configuration via UART/SPI Interface
Conforms with EU R&TTE 1999/5/EC directive
Tape & Reel packing (optional) for SMD mounting
Compatible with USB RF adapter AMB8465

NRND: Not recommended for new designs

AMBER wireless has announced that the device will be discontinued. The device is in production to support existing customers, but AMBER wireless does not recommend using this part in a new design.

Suggested Replacement: AMB8426
The device is completely pin and software compatible with the AMB8425. The only difference between AMB8425 and AMB8426 are the dimensions:

AMB8425: 27.0 x 16.0 x 3.5
AMB8426: 27.0 x 17.0 x 4.0

To obtain further product migration information please see product migration note.

The AMB8425 is a compact and low-cost radio data transmission module for wireless half-duplex communication. The integrated microprocessor controls data communication, handling packet and checksum formation, addressing, monitoring of channel access and resending not-received packets. The host system does not have to perform any radio-specific tasks.

The module can be configured in many ways and supports data transfer with fast channel and address switching. Measured field strength (RSSI value) offers the option of enhancing quality of the radio link. The GUI for the freely available Windows application AMBER-ACC makes it easy to set operating parameters.

The AMB8425 is constructed on an SMD design. If delivered in tape and reel packaging, the module is suitable for automatic component placement.

Interfaces
The AMB8425 is connected to a host system via the UART interface with bit rates of up to 115.2 kbaud. Other pins can be used for data flow control and to switch between operating modes. An SPI interface is included. Using appropriate firmware, the module is also suitable for autonomously recording digital or analogue signals.

Related product: USB RF adapter
A fully compatible wireless USB stick/adapter (AMB8465) is available to easily connect the AMB8425 to any PC system.

Range of Application
Data collection, monitoring, remote control and sensor networks. Its compact
dimensions and low power consumption make the radio module ideal for
battery-powered devices.