TRM-915-R250 datasheet(3/39 Pages) LINX

3 / 39 page

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Description

The 250 Series RF transceiver module is

designed for reliable bi-directional transfer

of serial data over distances of up to 4 miles

(6.4km) line of sight. Operating in the 902 to

928MHz frequency band, the module is capable

of generating +23.5dBm into a 50-ohm load

and achieves an outstanding typical sensitivity

of –105dBm. This high output power gives

the module exceptional range and also helps

overcome noisy environments at shorter ranges.

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 directly connected 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.

Features

• True UART to antenna solution

• Frequency Hopping (FHSS)

• 153.6kbps max RF data rate

• Includes robust protocol (CSMA,

assured delivery, addressing)

• Low Power Standby, Sleep and

Deep Sleep modes

• Adjustable output power

• 32-bit unique address

• 5 volt tolerant I/O

Applications

• Direct RS-232/422/485 Wire

replacement

• Asset tracking

• Automated meter reading

• Industrial/home automation

• Wireless sensors

• Remote data logging

• Fleet management

• Traffic and display signs

• Mass-transit communications

• Oil and gas sensing

• Long-range data links

TRM-915-R250

RF Transceiver Module

Data Guide

Figure 1: Package Dimensions

Revised 3/18/2015

1.200”

(30.48mm)

1.200”

(30.48mm)

0.170”

(4.32mm)

A large-print version of this document is available at

www.linxtechnologies.com.

Configuration Registers

Typical Applications

Power Supply Requirements

Antenna Considerations

Helpful Application Notes from Linx

Interference Considerations

Microstrip Details

Pad Layout

Board Layout Guidelines

Production Guidelines

Hand Assembly

Automated Assembly

General Antenna Rules

Common Antenna Styles

Regulatory Considerations

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