Senba Sensing Technology Co., Ltd.
Mini SMD Digital Pyroelectric Infrared Sensors S18-L242B-2
Mini SMD Digital Pyroelectric Infrared Sensors S18-L242B-2

Mini SMD Digital Pyroelectric Infrared Sensors S18-L242B-2

Overview

Senba Pyroelectric Infrared Sensors with high sensitivity, low noise and reliable performance. We have our own research and development department, with international technology and Hybrid IC technique expertise developed more than 15 years. The goods come standard with enhanced immunity to RFI (Radio Frequency Interference) and 2.4G high frequency interference. Senba PIR sensor suppport delay time, sensitivity adjustable, lighting adjustable.


Features

High sensitivity and excellent S/N ratio

Enhanced immunity to RFI (Radio Frequency Interference)

Slight movement can be detectable

High immunity to external noise (vibration, etc.)


Technical Data

1.Maximum Ratings

Characteristics

Symbol

Min. Value

Max. Value

Unit

Remarks

Working Temperature

TOT

-30

70


Storage Temperature

TST

-40

80


Max.current for pin

Into

-100

100

mA


Viewing angle


X=110°

Y=90°



Detection spectral response

λ

5

14

μm



2.Working Conditions (T=25°C, Vdd=3V,Except other requirements)

Characteristics

Symbol

Min.

Type

Max.

Unit

Remarks

Supply Voltage

VDD

2.2

3

3.7

V


Working Current

IDD

9

9.5

11

μA


Sensitivity

VSENS


90


μV

Non-adjustable

Output REL

Output Low Current

IOL

10



mA

VOL<1V

Output High Current

IOH



-10

mA

VOL>(VDD-1V)

Low REL output locking time

IOH


2.3


s

Non-adiustable

High REL output delay time

IOH

2.3


3600

s


Oscillator &Band Pass Filter(BPF)

Band Pass Filter(BPF)  Low cut-off frequency




7

Hz


Band Pass Filter(BPF)  High cut-off frequency




0.44

Hz


Oscillator frequency on Chip

FCLK



64

kHz





Interior Block Diagram




S18-l242b Interior Block Diagram.jpg


Applications

Wireless Devices/Mobile Equipment

Wireless occupancy sensors (powered by PV cells or battery)

PC and smart phones

Commercial & residential lighting fixtures

Video intercoms

Vending machines


FAQ

1.Can PIR sensor detect cars?

PIR-based Motion Detection: In this case motion is detected by means of a PIR sensor, a passive infrared sensor. This sensor detects emitted infrared energy from objects (humans and animals, but also cars) in the form of heat.


2.Do PIR sensors work in the dark?

Yes, motion sensors work in the dark. The way that a motion sensor detects movement has nothing to do with how light or dark it is in the immediate area. ... Since infrared energy is present and can be detected regardless of the amount of light in the environment, a PIR motion sensor will work just fine in the dark.

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