
25 Series RF Transceiver Module
Wireless UART RF Transceiver Module
Not recommended for new designs. Please contact Linx about the HumPRO™ Series, which replaces the 25 Series.
The 25 Series RF transceiver module is designed for reliable bi-directional transfer of digital data over distances of up to 1 mile (1.6km) line of sight. Operating in the 902 to 928MHz frequency band, the module is capable of generating +13dBm into a 50-ohm load and achieves an outstanding typical sensitivity of -105dBm. The module implements a Frequency Hopping Spread Spectrum (FHSS) protocol along with networking and assured delivery features. It has a Universal Asynchronous Receiver Transmitter (UART) serial interface that can be connected directly to microcontrollers, RS-232 converters or USB adaptors. The module automatically handles all radio functions resulting in a UART-to-antenna wireless link. All configuration settings and data are accessed through the UART interface. The 25 Series has a compatibility mode that enables it to operate with the more powerful, longer-range 250 Series modules. This enables mixed systems where a determination between cost and range can be made.
Benefits
- Easy integration: a complete radio, protocol and UART interface results in a complete UART-to-antenna solution
- High reliability: high power and a FHSS protocol combined with networking and assured delivery combine to create a robust system
- Low overhead: all configuration settings are done through the UART interface and the built in protocol handles all over-the-air functions, so very little software development is required
- Simplify design: modules and antennas are the only RF components you need; no tuning required
- Streamline production: save time and money with modules that are already tested
- Pre-certified: Evaluation modules are already certified
Ordering
Part | Description | Documentation | Stocking |
---|---|---|---|
TRM-915-R25 | 900MHz 25 Series Transceiver, 25mW | Datasheet | |
EVM-915-025-FCS | 900MHz 25 Series Evaluation Module, Straight RP-SMA Connector, Pre-Certified | Datasheet | |
EVM-915-025-FCR | 900MHz 25 Series Evaluation Module, Right Angle RP-SMA Connector, Pre-Certified | Datasheet |
To order, please call +1 (800) 736-6677 or +1 (541) 471-6256 for callers outside the United States.
TRM-915-R25 | |
---|---|
Role | Transceiver |
Frequency | 902 – 928MHz |
TX power | -2 – +13dBm |
RX sensitivity | -105dBm typical |
Interface | UART |
Modulation | FSK |
Operating voltage | 3 – 3.6VDC |
Supply current | TX @ 13dBm: 65mA typical TX @ -2dBm: 30mA typical RX: 20mA typical |
Standby current | 2.1mA typical |
Sleep current | 3µA typical |
Operating temperature | -40 – +85°C |
Package | Reflow-compatible SMD |
Architecture | Synthesized |
Protocol | Built in FHSS with CSMA, networking and assured delivery |
Application Examples
- Home and industrial automation
- Automatic meter reading (AMR)
- Wireless sensor networks
- Security systems
- Long-range data links
Downloads
Manuals & Datasheets
Application Notes
Application Notes 902-928MHz
- Guide to Wireless Regulations in the United States (FCC Resource Document)
- RF 101: Information for the RF Challenged (AN-00100)
- Considerations for Operation within the 902 MHz to 928 MHz Band (AN-00126)
- Data and Bidirectional Transmissions under Part 15.231 (AN-00128)
- Modulation Techniques for Low-Cost RF Data Links (AN-00130)
- The FCC Road: Part 15: From Concept to Approval (AN-00140)
- Antennas: Design, Application and Performance (AN-00500)
- Understanding Antenna Specifications and Operation (AN-00501)