ELSEMA
433.920MHz ASK Radio Data Receiver , R43305
Description
The R43305 is a radio data receiver to receive digital data. Baud rates of 300 to 4800 bps can be received. The low cost, small size, low
current consumption makes it ideal for various applications.
Technical Data
Supply Volt a g e 4.5 - 5.5 VDC Abs ol ut e maximum 6.5VDC.
Current Consumption 2.5mA
Receiver Type Single Conversion Superheterodyne
Receiving Freq 433.920MHz (Other frequencies available on request. Refer to the table below )
Oscillation System VCO with 10ppm Crystal Controlled reference Oscillator
Operating Temperature Range -5 to 50°C
IF Freq 320KHz
Selectivity -3dB at ±20kHz
Sensitivity Better than -107dBm or 1µV
Type of Demodulation Amplitude Shift Keying. (ASK)
Baud Rate 300 to 4800 bps with 50% duty cycle
Data Output Level 0-5V
Frequency Response 150 to 2400 Hz with 50% duty cycle (Other duty cycles
will degrade sensitivity)
Dimension 39 x 25 x 12mm
Weight 15 grams
Usable Transmitter T433 Data Transmitter
Antenna 50 ohms, 433MHz Antenna
R43305
433.920 MHz ASK RADIO DATA RECEIVER
Features
• Receives digital data
• Baud rates 300 - 4800bps
• Low cost, small size, low current consumption
Application
• Telecommand Systems
• Security Systems
• Alarms
• Radio Data Communications
• Commercial / Industrial Telemetry
ELSEMA
433.920MHz ASK Radio Data Receiver , R43305
Available Frequencies
SF2 433.664 MHz
SF3 433.408 MHz
SF4 433.152 MHz
SF5 434.688MHz
SF6 434.432 MHz
SF7 434.176MHz
SF8 433.792 MHz
SF9 434.304 MHz
Please quote Correct SF number when ordering transmitters on special frequencies .
Connections
R43305 Data Format
It is important to input the correct data format otherwise the receiver will have a lower sensitivity which will result in a reduced
transmission range.
The R43305 receiver data slicer is set for 50/50-duty cycle, therefore the “data in” should have a 50/50-duty cycle. The 50/50-duty cycle
data can be pulse-width modulated to transmit resets, 0's or 1's. See diagram below :
A 50/50-duty cycle will have an average DC signal resulting in a constant reference for the data slicer. Users should use pu lse-width
modulation to transmit data with logic 1's or 0's.
If a different duty cycle is used, for example 66/33 ( Manchester format) the data slicer in the receiver will try to adjust itself to the
average DC signal. Since this av erage DC signal is changing with different data bits this will result in a constantly chang ing reference
for the data slicer, resulting in lower sensitivity. See diagra m below :
ELSEMA
433.920MHz ASK Radio Data Receiver , R43305
*Only 50/50 duty cycle data is suitable for the T433 transmitter and R43305 receiver.
Manufactured by
Elsema Pty Ltd
3/10 Hume Rd, Smithfield
NSW 2164
Ph: 02 9609 4668
Fax: 02 9725 2663
Website: http://www.elsema.com
