Product selling point:
1. Using high-quality materials, the quality is guaranteed
2. Design a low-power micro/motion sensing module based on the X-band radar chip, with a center frequency of 1 0.525GHz. The design adopts fixed-frequency, directional transmitting and receiving antennas (1T1R), integrates functions such as intermediate frequency demodulation, signal amplification and digital processing, has the ability to set delay, is convenient for self-adjusting parameters, and does not pass through walls, anti-interference, small size, and miscellaneous The advantages of good wave and high harmonic suppression effect, high stability and consistency
3. The integrated algorithm inside the chip can directly output the detection results, without the need for an external single-chip microcomputer. In the module pulse power supply mode, the power consumption is at the microampere level, mainly for low-cost, low-power applications
4. Embedded installation, not affected by temperature and humidity, oil fume, water mist, etc., can be applied to various lamps, such as bulb lamps, down lamps, ceiling lamps, etc. Low-power application scenarios, such as video doorbell, peephole, door lock, low-power camera, etc.
5. Wide range of applications
Parameters:
Working frequency: 10.525GHz (10.40~10.65GHz)
Working voltage: 3.3~12.0V
Working current: 16mA (Max, VCC=3.3~12.0V)
Detection angle: Ceiling installation/3dB beam width/110°±10°
Sensing distance: 2~8 meters (hanging height 3 meters)
Output voltage: 3.3V (3.2~3.4V)
Power-on stabilization time: 15S (13~17S)
Working environment: temperature 20°C~+70°C/humidity 10~95%Rh
Blocking/delay time: 2S/5S(Typ.)
ESD characteristics: contact discharge/air discharge 2KV (Typ.)
Appearance size: 15x15x2.4mm
Drive power supply design considerations:
1. Be sure to use a drive power supply that meets the standards for output voltage, current, and ripple coefficient. The drive power supply is unstable and the electromagnetic radiation is too strong, which will cause false alarms, no perception, and cycle self-starting of the radar module;
2. The supporting driving power should be 3.3~12V, the driving current should not be lower than 1mA (or 100mA), the power supply ripple amplitude should be controlled within 100mV, and the power frequency fluctuation should be small;
3. When assembling the drive power supply and the radar module, avoid the bottom of the radar module or the antenna surface, facing the drive power supply module, and keep away from components with large power frequency interference such as rectifier bridges and switching transformers in the drive power supply module to avoid Anti-jamming microwave signal.
Precautions:
1. For devices equipped with radar modules, the installation location should be far away from ventilation pipes, fire pipes, drainage pipes, mechanical vibrations or places with strong vibration objects such as large metal equipment, because it will affect the radar reflection and detection perception effect;
2. It is strictly forbidden to work with live electricity, so as to avoid misoperation, wrong connection, burning out the circuit or electric shock;
3. Avoid installing in places exposed to the sun and rain to prevent damage and affect the service life;
4. The device must be installed in a place far away from the electromagnetic field to avoid malfunction caused by electromagnetic interference; it must also be installed in a place away from objects that are fixedly rotating or swinging (such as electric fans, swinging leaves, drying clothes in the wind, etc.) to avoid errors action produced;
5. When several devices with built-in radar modules are fixed and installed, the distance between each device should be ≥0.5m;
6. The antenna surface of the radar module is recommended to be 3~5mm away from the product shell, otherwise it will affect the perception distance;
7. After the device has a built-in radar module, it is recommended to place it horizontally or vertically within the effective sensing range, and try to avoid installing two or more devices with built-in radar modules face to face;
8. Avoid other lighting objects (such as emergency lights, guide lights, etc. interfering light sources) near the device (such as lamps) with built-in radar modules, so as not to cause the device (lamp) built-in photosensitive (if any) to fail to judge, making the device (lamp) ) cannot work normally (always off, misjudged as daytime);
9. If a device (such as a lamp) with a built-in radar module is always working (steady on), and cannot be turned on or off according to moving target detection, it may be that the radar module is interfered by the intermediate frequency, causing the module to always be judged as moving. Target moves within range of perception. At this time, the power should be turned off, and check whether the power supply status of the power board is normal and whether the distance between the modules has changed;
10. If the above problems cannot be solved, please cut off the power first and observe the surrounding conditions of the installation location, and first eliminate the influence of the surrounding environmental interference factors; if there are still problems after restarting the power supply, consider replacing the drive power board of the device, or the radar module again. verify.
The package includes:
Radar sensor module*1
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