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  3. IMX-070
IMX-070

Murata IMX-070 Operating instructions

  • Hello! I've analyzed the Quick Start Guide for Murata's Pyroelectric Infrared Sensor models IMX-070 and IMX-060. This document explains how to use the sensor, which detects changes in infrared radiation, and includes an evaluation board with amplifier and comparator circuits. I am ready to answer your questions about the sensor based on this guide.
  • What is the rated voltage of the sensor?
    What type of output signal does the sensor provide?
    What does the evaluation board include?
1murata.com Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017
1Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017
Pyroelectric Infrared Sensor
Evaluation Board:IMX-070, IMX-060
Quick Start Guide
2
Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017
Pyroelectric infrared Sensor
Evaluation Board: IMX-070, IMX-060
•It's a Evaluation Board to know how Pyroelectric Infrared
Sensor(IRA-S210ST01) working and performance.
–Specifications
•Rated Voltage : 3.3V
•Output signal : analog, comparator
•Dimension : 48×30mm
3
Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017
Quick Start Guide : Pyroelectric Infrared Sensor
Every objects emit IR(=Infra-Red) ray in
respond to its temperature.
Pyroelectric Infrared Sensor detects "change"
of IR distribution within its sensing area.
* sensing area is determined by lens design.
Amplifier and comparator circuits on evaluation
board amplifies sensor’s output signal and
generate digital High/Low signal. (Next page)
(Please make sure lens is attached on board.)
Pyroelectric Infrared Sensor
Amplifier &
Comparator
Circuit
4
Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017
Hardware Operation
PIR
AOUT
COUT
(H/L)
AMP
Infra-Red
Comparators
(window
comparator)
While there's no IR distribution
change, AOUT is 1.65V and COUT
is HIGH(=3.3V). When it detects
that, AOUT varies and once AOUT
crosses threshold, COUT falls to
LOW(=0V).
In the sample code, we detect this
COUT change with GPIO external
interruption and IRQ handler sets a
flag which is periodically monitored
in main loop.(Next page)
AOUT
COUT
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Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017
Software Operation : Sample Code Flow Chart
Measurement Start
f_PIR == true
Display
“IR change detected!!”
F_PIR = false
YES
NO
Wait 100ms
Interruption Handling
F_PIR = true
Done
6
Copyright © Murata Manufacturing Co., Ltd. All rights reserved. 19 June 2017
Pin Connection
Pin connection to each CPU board is also
instructed in sample code.
Evaluation board

Arduino
UNO
VCC
3.3V
GND
GND
COUT
D2
AOUT
A0
/