Indoor applications (sensing switches, sensing lights, etc.)

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Digital intelligent pyroelectric infrared sensor BS612

Overview

              

               BS612 is a pyroelectric infrared sensor that integrates digital intelligent control circuit and human body detection sensitive element in electromagnetic shielding cover. The human body detection sensor couples the sensed human body movement signal to the digital intelligent integrated circuit chip through a very high impedance differential input circuit, and the digital intelligent integrated circuit converts the signal into an ADC digital signal. When the PIR signal exceeds the selected digital threshold There will be a timed REL level output. The OEN enable terminal enables the REL output or automatic control by the light sensor. Sensitivity and time parameters are set by voltage divider resistors. All signal processing is done on-chip.

Feature

Digital signal processing, no drift and aging

High power supply rejection ratio, anti-radio frequency interference (mobile phone, WiFi, etc.)

A second-order Butterworth bandpass filter with built-in infrared sensor to shield input interference at other frequencies

Sensitivity, Ontime, and light sensor Schmitt REL output.

Ontime adjustable

Good stability and effective suppression of repeated malfunctions

Low power consumption and simple application circuit


Datasheet

1.Absolute Maximum Ratings 

Electrical characteristics(beyond those listed below may cause permanent damage to the device. Exposure to absolute maximum ratings may affect the device reliability. )

Parameter

Symbol

Min

Max

Unit

Remarks

Operating Temp

TST

-30

70


Current into any pin

Into

-100

100

mA


Storage Temp

TST

-40

80


2. Operating Conditions (T=25°C, Vdd=3Vunless stated otherwise)

Parameter

Symbol

Min

Type

Max

Unit

Remarks

Regular voltage

VDD

2.2

3

3.7

V


Supply current

IDD

9

9.5

11

μA


Sensitivity threshold

VSENS

90


2000

μV


Detective Wavelength

λ

5


14

um


Outputs REL

Output current low

IOL

10



mA

VOL<1V

Output current high

IOH

-10



mA

VOH>(VDD-1V)

Low REL output locking time

TOL


2


s

Non-adjustable

High REL output delay time

TOH

2


3600

s


Inputs SENS, ONTIME

Input voltage range


0


VDD1/2

V

Adjustable between 0V and VDD/2

Input leakage current


-1


1

μA


Input OEN

Input low voltage

VIL

0.8V-1.2V (Hysteresis zone)


0.8

V

Voltage threshold from high to low

Input high voltage

VIH

1.2



V

Voltage threshold from low to high

Input current

II

-1


1

μA

VSS<VIN<VDD

Oscillator and Filter

LPF cutoff frequency




7

Hz


HPF cutoff frequency




0.44

Hz


On chip oscillator frequency

FCLK



64

kHz



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SENBA Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality photoelectric components, such as PIR sensors, Photoresistors,Light Sensors, Flame detectors etc. Our strategic goal is to master the core technology.