Pyroelectric Infrared Sensor


Pyroelectric Infrared Sensor

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Digital Intelligent PIR Sensor BL312

Overview

The product is a type of intelligent PIR sensor which integrates digital circuit and sensitive element in a hermetically sealed package. It interfaces directly with up two conventional PIR sensors via a high impedance differential input. The PIR signal is converted to a digital value on chip. All signal processing is performed digitally. 


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.

Good stability and effective suppression of repeated malfunctions

Low power consumption and simple application circuit

Ontime 2s


Datasheet

Technical data

Parameter

Symbol

Min

Max

Unit

Remarks

Operating Temp

TST

-30

70


Current into any pin

Into

-100

100

mA


Storage Temp

TST

-40

80


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


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


s


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.