SMD Digital Intelligent Pyroelectric Infrared Sensor P816A

Short Description:

Product Description: The P816A digital pyroelectric sensor uses a dedicated human body infrared processing integrated circuit as the built-in processing chip. This integrated circuit has the overall function of a traditional passive infrared pyroelectric motion detector. The thermal motion signal detected by the pyroelectric sensor is used for access by the high input impedance input of the smart digital chip. The pyroelectric signal is converted into a 15-bit digital signal for digital band-...


  • FOB Price: US $0.5 - 9,999 / Piece
  • Min.Order Quantity: 100 Piece/Pieces
  • Supply Ability: 10000 Piece/Pieces per Month
  • Port: Shenzhen
  • Payment Terms: L/C,D/A,D/P,T/T
  • Product Detail

    Product Tags

    Product Description:

    The P816A digital pyroelectric sensor uses a dedicated human body infrared processing integrated circuit as the built-in processing chip. This integrated circuit has the overall function of a traditional passive infrared pyroelectric motion detector. The thermal motion signal detected by the pyroelectric sensor is used for access by the high input impedance input of the smart digital chip. The pyroelectric signal is converted into a 15-bit digital signal for digital band-pass filtering. The processed signal is The externally set sensitivity is compared with the timing digital threshold. If the pyroelectric digital signal exceeds the corresponding set threshold, there will be a delayed REL output. The OEN digital input enables REL output or prohibits REL output, which can be used as a conversion Illumination control, the voltage at the sensitivity setting terminal is converted into a digital value with 7-bit resolution, the delay time setting terminal voltage is divided into 16 delay time options, all signal processing is completed on the sensor’s built-in processing chip, and the output is directly digital Signal, easy to use.

    Features:

    ◆SMD package, can be mounted by reflow soldering;

    ◆Digital signal processing technology processes pyroelectric signals;

    ◆Two differential high input impedance input terminals are used as the sensor’s sensitive element input, with strong anti-interference ability;

    ◆Built-in digital band-pass filter, effectively remove other clutter frequency interference;

    ◆All signal processing is completed in the metal shell, with strong anti-electromagnetic interference ability;

    ◆Sensitivity, timing and illumination can be adjusted externally;

    ◆Low voltage, micro power consumption, fast response time;

    Application:

    ◆Intelligent security protection such as infrared mobile intrusion;

    ◆Corridor lights, indoor lights, corridor lights and other automatic induction lighting control;

    ◆Smart home appliances such as refrigerators, air conditioners, televisions, etc.;

    ◆Extranet infrared mobile detection;

    ◆Solar automatic sensor light;

    ◆Occupancy detection;

    1. The scope of use

    This text is used in the digital intelligent pyroelectric infrared sensor output device.

    2. Sensor output form

    Digital TTL output.

    3. Product name and product number

    3.1. Product Name: Intelligent Digital Pyroelectric Infrared Sensor

    3.2. Product number: P816A

    4. Shape and size

    4.1 Appearance: The surface is smooth and clean, without scratches, stains, rust and other signs

    4.2. SMD package, see attached drawings for detailed dimensions

     

    Electrical performance parameters:

    1. Maximum rated parameters

    Any electrical stress exceeding the parameters in the table below may cause permanent damage to the device. Operating under these maximum rated conditions may affect the reliability of the device.

    Parameter

    symbol

    Min

    Max

    Unit

    Note

    voltage

    Voo

    -0.3

    4.5

    V

     

    Pin limit

    Into

    -100

    100

    mA

    One pin at one time

    storage temperature

    Tst

    -45

    125

     

    2.Working conditions (T=25 ,)

    Parameter symbol Min Typical value Max Unit Note
    voltage VDD 1.5 3.0 4.5 V  
    Working current IDD 10 12 20 μA  
    Sensitivity threshold VSENS 104   517 μ V  
    Output REL  
    Output low electric wave LOL 5     mA VOL < 1V
    High electric wave output LOH     -5 mA VOH >(VDD-1V)
    Voltage input range   0   VDD V Adjustment range0V-1/4VDD)
    Input bias current   -1   1 μA
    Enable OEN  
    Input low voltage VIL     0.35 V  
    Input high voltage VIH 1.1     V  
    Input Current LI -1   1 μA VSS < VIN < VDD
    Oscillators and filters            
    Low pass filter cut-off frequency       7 Hz  
    High pass filter cut-off frequency       0.4 Hz  
    On-chip oscillator frequency FCLK     32 KHz  

    图片1

    1. Output REL trigger mode

     

    When the sensor receives an external signal and the effective signal processed by the digital filter exceeds the internal trigger threshold, a count pulse is generated internally. When the sensor receives such a signal again, a second pulse will be generated internally. If two pulses are received within 4 seconds, the EL pin will have a high level output. If the received signal amplitude exceeds 5 times of the trigger threshold, only one pulse can trigger the REL pin to output a high level. The delay time of output REL starts from the last valid pulse.

    图片2

    4. Delay time adjustment

    The voltage applied to the ONTIME pin determines the time that the REL output remains active after the last alarm. If multiple alarm conditions are detected during the output time period, the timer will restart as long as the alarm conditions are detected.

     

    5. Trigger threshold of sens pin

     

    The input voltage on the sens pin determines the comparison threshold of the input signal of the sensor. When the sensor is grounded, the comparison threshold of the sensor is the lowest, and the sensitivity of the sensor is the highest, that is, the sensing distance may be the farthest; When the input voltage exceeds 1 / 4 VDD, the maximum threshold will be selected, and the sensor sensitivity is the lowest, that is, the sensing distance may be the smallest. The sensing distance of the sensor is not linear with the voltage on the sens pin. Combined with different Fresnel lenses and different sensitivities, the sensing distance is subject to the actual test.

     

    1. Pyroelectric infrared sensor is to detect infrared energy changes and output signal, for non human infrared energy changes will also have signal output, such as small animals, sunlight and other strong light direct, air conditioning can cause temperature changes. For the heat source that does not move or moves at a high speed, when the ambient temperature is close to the temperature of human body, the sensor will not output the signal when the infrared signal output by human body does not fluctuate enough.

    2. The sensor optical window direction combined with Fresnel lens reasonable installation, can achieve the ideal detection distance and angle, the design should pay attention to the selection of appropriate lens, and avoid the sensor metal shell directly exposed in the external flowing air.

    3.In the process of use, excessive vibration should be avoided as far as possible. The optical window should be kept clean, and there should be no hard objects or other debris friction, which will cause performance failure or instability.

     

    4. During the welding process of sensor, the following items should be followed as far as possible:

    Attention

    ◆Please do not exceed the maximum temperature of the temperature curve shown in the figure above, otherwise the performance of the sensor may be degraded.

    ◆Please do not repeatedly carry out reflow welding and repeatedly heating disassembly and repair, which will seriously affect the life and performance of the sensor and is not within the scope of product warranty.

    ◆Please do not use corrosive chemicals to clean the optical filter (absolute alcohol can be used), which may cause sensor failure or failure.

    ◆Please do not use the sensor immediately after mounting. It is recommended to use it after 1h.

    ◆Please avoid touching the terminal with metal sheet or hand.

    ◆ Please follow the temperature curve shown in the following figure when reflow welding. Any temperature exceeding the reflux temperature shown in the following figure shall be consulted with sales engineer in advance




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