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High Performance ASK Transceiver
TRA150D-050-5
Features * 151.625 MHz (Other frequencies available 148MHz
to 152 MHz)
* * * * * *
Data rates to 19.2 kbps -105 dBm receiver sensitivity RSSI output Carrier Detect Output CRYSTAL stabilised Fast TX and RX settling and switching times
Applications * EPOS TERMINALS * REMOTE TELEMETRY & TELECOMMAND
* * * REMOTE METER READING DOMESTIC AND COMERCIAL SECURITY
GPS AND INVENTORY MANAGEMENT
General Description
The TRA150D radio transceiver module was designed to provide reliable wireless operation at moderate data rates for use throughout the world. The TRA150D is a low power ASK transceiver that has been designed to interface directly to a micro controller. The module has been optimised for fast turn on and exhibits a power down mode for low current operation. In conjunction with a high performance antenna, the unit has a typical range up to several km. The module is compatible with our WDXX range of controllers for evaluation, development and turnkey solutions. The receiver section uses a single conversion super-het design,
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High Performance ASK Transceiver
TRA150D-050-5
Absolute Maximum Ratings: Transceiver
Operating temperature: Storage temperature: Supply Voltage Data input RF Input -20C to +80C -40C to +100C 6V Vcc + 0.3v 0dBm
Electrical Characteristics:
Performance data measured at 20 C and +5 volt supply and RF = 151.625 MHz. version
o
pin DC LEVELS Supply voltage Supply current (receiver enabled) Supply current (transmitter enabled) Supply current (Power down mode) Data input/output high Data input/output low RF Receiver sensitivity (12 dB SINAD) Image rejection RF power out (transmitter) ASK depth Overall frequency accuracy RF input compression level E.M.C. Spurious responses upto 1GHz LO leakage, conducted LO leakage, radiated DYNAMIC TIMING RX enable to valid RSSI / CD RX enable to stable receiver data out TX enable to full RF out Allowable data pulse widths Data Bit rate Notes 7 7 7 2,4 2,4
min. 4.75
typ. 5 35 85 250
Max. 5.25
units V mA mA uA V V
notes
0.7xVcc 0
Vcc 0.0xVcc
2
-105 50 50 25 +/-20 -30
-110
dBm dB mW dB KHz dBm
35
<-30 <50 <50
dB dBm dBm
100 100 80 1 50 100 65,000
uS uS uS uS bps
1
1) The data slicer is optimised for a 50:50 duty cycle hence for reliable communications data should be encoded using a suitable scheme such as Manchester Encoding, although pulse width modulation up to 70:30/30:70 can also be used.
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High Performance ASK Transceiver
TRA150D-050-5
Pin No.
Pin Name
Description
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
D1 +5V D2 A1 D3 A2 D4 A3 D5 A4 D6 GND D7 GND D8 GND
Digital IO (RC1) VCC, DC Power source (200mA max) Digital IO (RC2) Digital IO (RB7) Digital IO (RC3) Digital IO (RB6) Digital IO (RC4) Digital IO (RB5) Digital IO (RC5) Digital IO (RB4) Digital IO (RB5) Common, 0V Digital IO (RB6) Common, 0V Digital IO (RB7) Common, 0V
RF in Vs RSSI - TRA150D-050-5
1.2
1
0.8 RF in(dBm)
0.6
Series1
0.4
0.2
0 -120 -115 -110 -105 -100 -95 -90 -85 -80 -75 -70 -65 -60 -55 -50 -45 -40 -35 -30 RSSI(V)
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High Performance ASK Transceiver
TRA150D-050-5
MECHANICAL DETAILS
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High Performance ASK Transceiver
TRA150D-050-5
Application Information Antenna Design
The design and positioning of the antenna is as crucial as the module performance itself in achieving a good wireless system range. The following will assist the designer in maximising system performance. The antenna should be kept as far away from sources of electrical interference as physically possible. If necessary, additional power line decoupling capacitors should be placed close to the module. The antenna `hot end' should be kept clear of any objects, especially any metal as this can severely restrict the efficiency of the antenna to receive power. Any earth planes restricting the radiation path to the antenna will also have the same effect. Best range is achieve with a ground independent, 3dB or better gain, groundindependent antenna. Good range can be achieved with either a straight piece of wire, rod or PCB track @ 1/4 wavelength (500mm). Further range may be achieved if the 1/4 wave antenna is placed perpendicular in the middle of a solid earth plane measuring at least 500mm radius. In this case, the antenna should be connected to the module via some 50 Ohm characteristic impedance coax
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High Performance ASK Transceiver
TRA150D-050-5
Applications Support Hotline
Your questions may be forwarded to us at the following email address;
mailto:support@orbitcoms.com
Ordering Information
Standard Product;
Part No TRA150D-050-5 TRA150D-050-5S
Description 151.625 MHz Transceiver 151.625 MHz Transceiver with SMA connector and EMC sheild
International Headquarters
Your Local Distributor:
ORBIT COMMUNICATIONS PO BOX 4474, LAKEHAVEN NSW 2259, AUSTRALIA Tel +61 (2) 4393-3627 Fax +61 (2) 4393-3685 Email : mailto:sales@orbitcoms.com Web : http://www.orbitcoms.com/
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