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R15105
151.600MHz FSK Radio Data Receiver
Features
• Receivers digital data
• Baud rates 40 - 4800bps
• Low cost, small size, low current consumption
Applications
• Telecommand Systems
• Security Systems
• Alarms
• Radio Data Communications
• Commercial / Industrial Telemetry |
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 Download Datasheet
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Description
The R15105 is a radio data receiver to receive digital data. Baud rates of 40 to 4800 bps can be received. The low cost, small size, low current consumption makes it ideal for various applications.
There are 8 selectable frequencies available. This is achieved by Changing Crystals on special frequencies.
Product in the Range
Technical Data
| Supply Voltage |
4.5 to 5.5 Volts DC. Absolute maximum 6.5VDC |
| Current Consumption |
10mA |
| Receiver Type |
Single Conversion Superheterodyne |
| Receiving Freq |
151.6MHz (8 selectable frequencies within 150.900 - 151.600MHz with 100KHz spacing avaliable). |
| Oscillation System |
VCO with 10ppm crystal controlled reference oscillator. |
| Operating Temperature Range |
-5 to 50°C |
| IF Freq |
10.7MHz |
| Selectivity |
Better than -6 dB at + - 25 KHz |
| Image Rejection |
Better than -640dB at 130.200 |
| Sensitivity |
-107dBm or 1µV |
| Type of Demodulation |
Narrow-band-width Frequency Modulatio (FM) |
| Occupied Band Width |
25KHz at -20dB. |
| Baud Rate |
40 to 4800 bps with 50% duty cycle |
| Data Output Level |
0-5V |
| Frequency Response |
20 to 2400Hz |
| Dimension |
39 x 25 x 12mm |
| Weight |
22 grams |
| Usable Transmitter |
T15105 Data Transmitter |
| Antenna |
50 ohms, 151MHz Antenna |
Connection Diagram
R15105 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 R15105 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 pulse-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 average DC signal is changing with different data bits this will result in a constantly changing reference for the data slicer, resulting in lower sensitivity. See diagram below :
*Only 50/50 duty cycle data is suitable for the T15105 transmitter and R15105 receiver.
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