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MINI SMD Four Element Anti Jamming Digital Pyroelectric Infrared Sensor
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MINI SMD Four Element Anti Jamming Digital Pyroelectric Infrared Sensor

When the pyroelectric infrared signal received by the MINI SMD Four Element Anti Jamming Digital Pyroelectric Infrared Sensor exceeds the trigger threshold inside the probe, a counting pulse is generated internally. When the probe receives such a signal again, it will think that it has received the second pulse. Once it receives 2 pulses within 4 seconds, the probe will generate an alarm signal and the REL pin will have a high level trigger.

Model:PD-PIR-462LA-D

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Product Description

MINI SMD Four Element Anti Jamming Digital Pyroelectric Infrared Sensor


Features
Small SMD reflow soldering method 
Digital signal processing
Enable power regulation to save energy 
Built-in filter, strong anti-interference 
Adjustable sensitivity, timing and light control 
Low voltage, micro power consumption
 Application
Infrared movement detection 
Internet of Things 
Wearables
Smart home appliances, home 
Smart luminaires
Security, automotive anti-theft products 
Network monitoring system, etc


Product and recommended pad size diagram of MINI SMD Four Element Anti Jamming Digital Pyroelectric Infrared Sensor


Basic parameters of MINI SMD Four Element Anti Jamming Digital Pyroelectric Infrared Sensor
Anything beyond the ratings in the following table may cause permanent damage to the device. Long-term use near the rated value may affect the reliability of the device.

Parameters

Symbol

Min

Max

Unit

Note

Voltage

VDD

2.2

3.7

V

 

View angle

 

X=110°

Y=90°

°

The field of view angle is a

theoretical value

Storage temperature

TST

-40

80

℃

 

Detect wavelengths

λ

5

14

μm



Internal block diagram


Working conditions (T=25° C, VDD=3V, unless otherwise specified)

Parameters

Symbol

Min

Typ

Max

Unit

Note

Supply Voltage

VDD

2.2

3

3.7

V

 

Working current

IDD

9

9.5

11

μA

 

Sensitivity threshold

VSENS

90

 

2000

μV

 

Output REL

Low output current

IOL

10

 

 

mA

VOL<1V

Output high current

IOH

 

 

-10

mA

VOH>(VDD-1V)

REL low level output lock time

TOL

 

2

 

s

Not adjustable

REL high level output lock time

TOH

2

 

3600

s

 

Enter SENS/ONTIME

Voltage input range

 

0

 

VDD/2

V

The adjustment range is between 0V and VDD/2

Input bias current

 

-1

 

1

μA

 

Enable OEN

Input low voltage

VIL

Between 0.8V-1.2V

is the hysteresis area

0.8

V

OEN voltage high to low threshold level

Input high voltage

VIH

1.2

 

 

V

OEN voltage low to high threshold level

Enter the current

II

-1

 

1

μA

Vss＜VIN＜VDD

Oscillators and filters

 

 

 

 

 

 

Low-pass filter cutoff frequency

 

 

 

7

Hz

 

High-pass filter cut-off frequency

 

 

 

0.44

Hz

 

The oscillator frequency on the chip

FCLK

 

 

64

kHz

 


Output trigger mode

When the pyroelectric infrared signal received by the probe exceeds the trigger threshold inside the probe, a counting pulse is generated internally. When the probe receives such a signal again, it will think that it has received the second pulse. Once it receives 2 pulses within 4 seconds, the probe will generate an alarm signal and the REL pin will have a high level trigger.
In addition, as long as the received signal amplitude exceeds more than 5 times the trigger threshold, only one pulse is required to trigger the output of the REL.The following figure is an example of trigger logic diagram. In the case of multiple triggers, the maintenance time of output REL starts from the last valid pulse.



ONTIME pin timing setting
When the probe detects the human body movement signal, it will output a high level on the REL pin. The duration of this level is determined by the level applied to the ONTIME pin (see the table below). If the REL high level device has multiple trigger signals generated, as long as a new trigger signal is detected, the REL time will be reset, and then the timing will be restarted.

1. The working current is related to the selected resistance R. The larger the resistance, the smaller the working current. The average current consumed by R during the REL effective delay period is: IR ≈ 0.75VDD/R. During the ineffective delay period, R consumes no current. If you have high power consumption requirements and are often in the effective delay time period, it is recommended to use the digital REL timing mode.


2. If the digital REL timing mode is adopted, the ONTIME pin is connected to a fixed potential whose maximum value is less than VDD/2 (in actual use, the resistor divider can be used to adjust the REL timing). The ONTIME input voltage sets the REL output holding time through the only trigger. Refer to the table below for the output delay timing (Time Td) and voltage settings. Note: When using the digital REL timing method, the ONTIME pin voltage must not be higher than VDD/2, and the timing time can only be selected from one of the 16 times in the table below. If the time in the table below is not suitable, it is recommended to use the analog REL timing method.


Time gear

Setting time (s) (Typical value)

 TIME pin voltage range

 Typ

Recommended value of divider resistor (accuracy ±1%)

 

 

 

 

Pull-up resistor RH

Pull-down resistance RL

1

2

0~1/32VDD

1/64VDD

Not posted/1M

0R

2

5

1/32VDD~2/32VDD

3/64VDD

1M

51K

3

10

2/32VDD~3/32VDD

5/64VDD

1M

82K

4

15

3/32VDD~4/32VDD

7/64VDD

1M

124K

5

20

4/32VDD~5/32VDD

9/64VDD

1M

165K

6

30

5/32VDD~6/32VDD

11/64VDD

1M

210K

7

45

6/32VDD~7/32VDD

13/64VDD

1M

255K

8

60

7/32VDD~8/32VDD

15/64VDD

1M

309K

9

90

8/32VDD~9/32VDD

17/64VDD

1M

360K

10

120

9/32VDD~10/32VDD

19/64VDD

1M

422K

11

180

10/32VDD~11/32VDD

21/64VDD

1M

487K

12

300

11/32VDD~12/32VDD

23/64VDD

1M

560K

13

600

12/32VDD~13/32VDD

25/64VDD

1M

634K

14

900

13/32VDD~14/32VDD

27/64VDD

1M

732K

15

1800

14/32VDD~16/32VDD

29/64VDD

1M

825K

16

3600

15/32VDD~16/32VDD

31/64VDD

1M

953K


Sensitivity settings

NO.

SENS pin voltage

 NO.

SENS pin voltage

 

Voltage range (VDD)

Central voltage (VDD)

 

Voltage range (VDD)

Central voltage (VDD)

0

0~1/64

1/128

16

16/64~17/64

33/128

1

1/64~2/64

3/128

17

17/64~18/64

35/128

2

2/64~3/64

5/128

18

18/64~19/64

37/128

3

3/64~4/64

7/128

19

19/64~20/64

39/128

4

4/64~5/64

9/128

20

20/64~21/64

41/128

5

5/64~6/64

11/128

21

21/64~22/64

43/128

6

6/64~7/64

13/128

22

22/64~23/64

45/128

7

7/64~8/64

15/128

23

23/64~24/64

47/128

8

8/64~9/64

17/128

24

24/64~25/64

49/128

9

9/64~10/64

19/128

25

25/64~26/64

51/128

10

10/64~11/64

21/128

26

26/64~27/64

53/128

11

11/64~12/64

23/128

27

27/64~28/64

55/128

12

12/64~13/64

25/128

28

28/64~29/64

57/128

13

13/64~14/64

27/128

29

29/64~30/64

59/128

14

14/64~15/64

29/128

30

30/64~31/64

61/128

15

15/64~16/64

31/128

31

31/64~32/64

63/128


The voltage input by SENS sets the sensitivity threshold, which is used to detect the strength of the PIR signal input by PIRIN and NPIRIN. When grounded, it is the minimum voltage threshold, and the sensitivity is the highest at this time. Any voltage exceeding VDD/2 will select the maximum threshold. This threshold is the lowest sensitive setting for PIR signal detection, that is, the sensing distance may be the smallest. It should be pointed out that the sensing distance of the infrared sensor is not linearly related to the SENS input voltage. Its distance is related to the signal-to-noise ratio of the sensor itself, the imaging object distance of the Fresnel lens, the background temperature of the moving human body, the ambient temperature, the ambient humidity, and electromagnetic interference. And other factors form a complex and multiple relationship, that is, the output result cannot be judged by a single index, and the debugging result shall prevail in actual use. The lower the voltage of the SENS pin, the higher the sensitivity, and the longer the sensing distance. There are a total of 32 sensing distances to choose from, and the closest sensing distance can reach centimeter level. In actual use, the resistance divider can be used to adjust the sensitivity.


OEN pin settings

OEN is the enable pin for REL output. When OEN inputs a low voltage, the REL output is always low; when OEN inputs a high voltage, when the PININ /NPIRIN pin senses a normal human body trigger signal through the sensor, REL outputs a high level until there is no human body trigger signal, and it passes REL After the timing time, REL outputs low level. After a shielding time of about 2 seconds, the human body signal can be sensed again. OEN pin can be connected to photoresistor or photodiode to realize the function of not working during the day and working at night.

Typical application circuit
Triode application example



Reflow soldering
Sensor reflow soldering instructions
When reflow soldering, please follow the temperature curve shown in the figure below. Anything that exceeds the reflow temperature shown in the figure below must consult the sales engineer in advance.


Packaging


Note: The standard package is 1000 pieces, and the package quantity and size vary slightly according to different models.

Note for welding
Do not exceed the maximum temperature of the temperature curve shown in the figure above, otherwise it may cause the sensor performance degradation.
Do not repeat reflow soldering and repeated heating and disassembly, which will seriously affect the life and performance of the sensor and is not covered by the product warranty.
Do not use corrosive chemicals to clean the optical filter (absolute ethanol can be used), which may cause the sensor to malfunction or fail. Do not use it immediately after the sensor is mounted, it is recommended to use it after 1H.
Be careful not to touch the terminals with metal pieces or hands. Note for welding:

Operating environment temperature (humidity) range
＞ Temperature: Working temperature: -30℃～+70℃ (no fog or icing, temperature change may cause sensitivity and distance change) Storage temperature: -40℃～ +80℃
＞ Humidity: Working humidity: ≤ 85%RH (should not be fogged or frozen)
Storage humidity: ≤ 60%RH
＞ Regarding the use environment temperature and the scope of adaptation, it refers to the temperature and humidity that can make the sensor work continuously, not the continuous work guarantee for durability and environmental resistance. When used in a high temperature and high humidity environment, the sensor will accelerate aging.

Other considerations
＞ Misoperation may occur due to electrothermal noise such as static electricity, lightning, mobile phones, radios, and high-intensity light.
＞ The customer terminal product should be installed firmly to avoid malfunction caused by wind and shaking.
＞ It will be damaged after strong vibration or impact and cause malfunction. Please avoid high-strength vibration or impact.
＞ This product is not a waterproof and dustproof product. It should be waterproof, dustproof, anti-condensation and anti-icing when using it.
＞ If corrosive gas volatilizes in the working environment, it will cause malfunction.




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