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Pyroelectric Infrared Sensor

Pyroelectric Infrared Sensor

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BS412

Pyroelectric Infrared Sensor

PROD Model:BS412

Window Size:3*4mm

Output Signal:High and low level output

Sensing Distance:12M(Lens SB-F-02) See lens selection for different distances

Sensing Angle:120°(horizontal direction)

Working Voltage: 2.2-3.7V

Static Power Consumption: <12uA

General Description

It is a low power pyroelectric
infrared sensor(PIR) for motion detection . Using the MCU for
communication,when the RS412 performs continuous motion sensing,the MCU
does not need to be activated, it only activates the external MCU when
motion is detected. Motion detection results are sent out via the output
interrupt signal.The algorithm for motion detection is programmable and
can be changed by external MCU configuration, The PIR signal is
converted into a 14-bit digital value on the chip, and then enters the
motion algorithm detection unit. All signal processing is digital and
supports motion detection result output and raw data output.

Features

Power supply voltage range 1.6V-5.5V

Programmable detection standard and working mode

Digital signal processing

Ultral low power consumption 

Power supply voltage measurement

Temperature measurement

Fast and stable power-on


Technical Data

1.Technical data

Description

Symbol

Min

Typical

Max

Unit

Remarks

VDD voltage

VDD

-0.3


5.5

V

25℃

Analog pin voltage


-0.3


VDD+0.3

V

25℃

Digital pin voltage


-0.3


VDD+0.3

V

25℃

Storage temperature


-30


80


2.Operating Conditions ( TAMB = +25  Typical VDD=3V)

Description

Conditions

Symbol

Min

Typical

Max

Unit

Operating temperature

Operating temperature range



-20


+70

Operating Voltage

Supply voltage


VDD

1.6


5.5

V

Supply current

Supply current, VPIR regulator on

VDD=3V, no load

IDD1


6

8

µA

Supply current, VPIR regulator off

VDD=3V, no load

IDD


3

5

µA

Input parameter SERIN

Input low voltage


VIL



0.2

VDD

Input high voltage


VIH

0.8



VDD

Input Current

VSS<VIN<VDD

IIN

-1


1

µA

Digital clock low time


tL

200



ns

Digital clock high time


tH

200



ns

Data Bit Write Time


tBW

2/FCLK


5/FCLK

µs

Write timeout


tWL

16/FCLK



µs

Data input and output pins INT/DOCI

Input low voltage


VIL



0.2

VDD

Input high voltage


VIH

0.8



VDD

Output current high

VOL>(VDD-1V)

IOH



-200

µA

Output current low

VOL<1V

IOL

200



µA

Input capacitance




5


pF

Force read setup time


TFR

2/FCLK




Interrupt clear time


tCL

2/FCLK




Digital clock low time


tL

200


tRA

ns

Digital clock high time


tH

200



ns

Read timeout


tRA

4/F



µs


Description

Conditions

Symbol

Min


Typical

Max

Unit

 

Supply voltage measurement

Resolution



590

650

720

µV/count

ADC output range



2^13

2^14-511


Counts

Temperature measurement (requires single point calibration)

Resolution




80


Counts/K

ADC output range



511


2^14-511

Counts

Value at 300K



6700

8200

9900

Counts

Oscillator and Filter

Filter cutoff frequency



FCLK * 1.41 / 2048 / PI

Hz

HPF cutoff frequency



FCLK /16 * 1.41 / 2048 / PI

Hz

On-chip oscillator frequency


FOSC

56

64

74

kHz

System clock


FCLK


FOSC/2



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