Motion detector (PIR, uWave, etc.)

Products and reference designs

Motion detector (PIR, uWave, etc.)

Block diagram


Motion or occupancy detectors are used to detect security threats, save energy by efficient lighting control and trigger other IoT enabled devices. Our integrated circuits and reference designs help you add different technologies (passive infrared sensor (PIR), uWave radar, microwave, ultrasonic, time-of-flight, etc.) to your system.

Design requirements

Motion detector (PIR, uWave, etc.) designs often require:

  • A long battery life of 10+ years.
  • Extremely low-noise analog signal chain for long detection range (10m – 15m).
  • Low settling time of amplifier stages.
  • False trigger avoidance due to environmental changes.
  • Ability to accurately detect and classify objects, such as human versus pet.

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Block diagram

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Technical documentation

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Type Title Date
More literature Reduce False Triggers and Extend Battery Life in PIR Sensing Applications 29 May 2018
More literature Ultra-Low Power Designs With the CC13x2 and CC26x2 Sensor Controller 27 Feb 2018
Technical articles Industrial DACs: How to design 2-wire transmitters 23 Jan 2015
More literature Bringing intelligent autonomy to fine motion detection (Rev. A) 20 Dec 2018
Technical articles Inductive sensing: How to design an inductive sensor with the new WEBENCH Coil Designer 19 Aug 2015
More literature Techniques for PIR-based motion detection 16 Dec 2020
More literature Techniques for PIR-based motion detection 16 Dec 2020
Technical articles Driving industrial innovation with small-size sensors 12 Sep 2019
More literature Design of Ultra-Low Power Circuits for Battery-Powered Wireless PIR Motion Detec (Rev. A) 12 May 2017
More literature Extend Battery Life with <100 nA IQ Buck Converter Achieving <150 µV Voltage Rip (Rev. A) PDF | HTML 11 May 2022
More literature Wireless Motion Detector With Sub-1 GHz SimpleLink™ Wireless MCU (Rev. C) 10 May 2022
More literature Introduction to Time-of-Flight Camera (Rev. B) 07 May 2014
More literature Cost-Optimized Opamp Window Comparator for Ultra-low Power PIR Motion Detectors 07 Mar 2017
More literature The fundamentals of millimeter wave radar sensors (Rev. A) 06 May 2021
More literature Power Cycling an IoT System with a Nano-power System Timer 06 Dec 2016
Technical articles How ultrasonic technology improves convenience and performance in home automation 05 Oct 2017
Circuit design Low-power sensor measurements: 3.3-V, 1-ksps, 12-bit, single-ended, dual-supply (Rev. A) 03 Dec 2021
Circuit design Low-power sensor measurements: 3.3-V, 1-ksps, 12-bit, single-ended, single-suppl (Rev. A) 03 Dec 2021
More literature Precision Voltage Offset: When Does it Matter? (Rev. A) 02 Nov 2016

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