ER900TS EASY RADIO, ER900TS Datasheet - Page 4

• Manufacturer Part Number: ER900TS
• Description: MODULE, TX, FM, 860-920MHZ
• Manufacturer: EASY RADIO

Specifications of ER900TS

• External Depth: 3.8mm
• External Length / Height: 12.5mm
• External Width: 32mm
• Frequency: 868MHz
• Operating Temperature Max: 65°C
• Operating Temperature Min: -20°C
• Output Power: 10mW
• Range: 150m

Introduction to easyRadio
The easyRadio (ER) ERx00TS Transmitter, ERx00RS Receiver and ERx00TRS transceiver incorporate
‘easyRadio’ technology to provide high performance, simple to use radio devices that can transfer data over
a range of up to 250 metres Line Of Sight (LOS). Furthermore ‘Easy-Radio’ technology allows frequency,
data rate and power output to be optimised for customer specific applications. The embedded software
reduces design and development time significantly.
ER modules are available in two frequency versions: ER400 series (433-434MHz) & ER900 series
(869.85MHz & 902-928MHz). For purposes in this document they will be referred to as ERx00.
2nd Generation Modules (please READ)
This Data Sheet covers the new hardware/firmware revisions of the Easy Radio TS, RS & TRS modules.
Their Part numbers are the same as before with the addition of “-02” (eg. ER400TRS-02).
The “02” modules address issues that have been identified in previous hardware. The primary objectives for
its development was to solve two main issues:
What improvements are there in ‘02’?
Of course some specifications have been effected to allow these hardware changes, but we feel it has been
a necessary move to improve the product. LPRS are committed to the continued development and
enhancement of Easy Radio and enhancements may be made without prior notice. A list of development
hardware and software known issues and changes are listed at the end of this document. Please always
make sure you are reading the latest document for update information.
This data sheet describes the electrical and physical characteristics of the device. Operation of the Easy
Radio software and Timing Specifications are described later in this document. Further information is
available in the ‘Easy-Radio Demonstration Kit & Programming Software’ guide, which should be read in
conjunction with this data sheet.
LPRS Data Sheet
ERx00-02 Series V2.3
General Features
Crystal controlled synthesiser for frequency accuracy
High sensitivity receiver – typically –103dBm @ 19.2 Kbps
Up to 10mW Transmit Power (at 434MHz)
Low operating Voltage – 2.5-5.5 Volts – Single Lithium Cell
Low power consumption:
User programmable:
•
•
•
1. The µC has now been changed to one which also has a low-voltage brown-out-detect (BOD) circuit
2. The Crystal that controls the RF is now as low as +-10ppm, which guarantees consistent frequency
Unintentional Loss of user configured settings:
Frequency Stability:
Back Compatibility:
built in. Extensive testing has been done on this, and therefore power cycling techniques to conserve
power are now easily achieved without the loss of programmed settings. The new µC also benefits
from greater ROM size and peripheral features which means more functionality is being packed into
the Easy Radio Modules.
stability over batches and over an extended temperature range of –40°C to +85°C.
o
o
o
The previously used micro-controller (µC) was susceptible to EEPROM corruption when a
‘brown-out’ condition occurred. Particularly when power cycling the module. This had the
effect of triggering the automatic Reset to Default behaviour of the module.
Previous data sheets clearly show a frequency tolerance of +-50ppm. Despite operating
within this specification, over some batches of product this has caused some unreliable
communication to occur, as frequencies have been too far away from each other. If you are
having issues in this area, please contact us.
New Modules can be set to be compatible with any frequency variations in the past. Please
contact technical for details or consult evaluation software help file.
Datasheet Revision 2.3 Sept 2005
ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver
ER900TS Transmitter, ER900RS Receiver & ER900TRS Transceiver
Frequency of operation
Receiver - 21mA
Transmitter - 25mA
Sleep – 120
Data Rate
Output Power
µ
Easy-Radio ‘02’ (2
A (V2.01.6 + later)
Copyright LPRS 2005.
nd
Generation Modules)
Applications
Handheld Terminals
Environmental Sense & Control
Vehicle to Base Station Data Transfer
Remote Data Acquisition
Electronic Point of Sale equipment
Etc
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