Low-Power PIR Motion Detector With Bluetooth Smart & 10-Year Coin Cell Battery Life Reference Design


Design files


This reference design uses nano-power operational amplifiers, comparators and the SimpleLink™ ultra-low power 2.4-GHz wireless microcontroller (MCU) platform to demonstrate a low-power wireless motion detector implementation.  These technologies lead to an extremely long battery life of over 10 years with a standard CR2032 lithium-ion coin-cell battery which could be used for applications including motion detection or lighting control through occupancy detection.  The PIR sensor has sensitivity of up to 30 feet with a shutdown current of 1.63 µA.  The design guide includes techniques for system design, detailed test results and information to get the design up and running quickly.

  • Use of nano-power analog for ultra-low power design resulting in 10-year battery life from a single CR2032 Coin Cell
  • Low shutdown current of 1.63 uA (PIR sensor remains active in shutdown)
  • Ultra-low active state current due to low active processor and radio transmit currents (1.57 mA for 56.66 ms)
  • Interrupt-driven Bluetooth® smart wireless communication of motion for increased power savings
  • Motion sensitivity up to 30 feet
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.


Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement


Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB

TIDRKS2.PDF (1760 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

General-purpose op amps

LPV521Single, 5.5-V, 6.2-kHz, ultra low quiescent current (350-nA), 1.6-V min supply, RRIO op amp

Data sheet: PDF | HTML
Bluetooth products

CC2650SimpleLink™ 32-bit Arm Cortex-M3 multiprotocol 2.4 GHz wireless MCU with 128kB Flash

Data sheet: PDF | HTML

TLV3691Nanopower, small-size, single comparator

Data sheet: PDF | HTML

Start development



TIDA-00759 Firmware — TIDCBX4.ZIP (4465 K)

Technical documentation

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Type Title Date
* Design guide Low-Power PIR Motion Detector With 10-Year Coin Cell Battery Design Guide (Rev. B) Dec. 15, 2016
Application note Wireless Motion Detector With Sub-1 GHz SimpleLink™ Wireless MCU (Rev. C) May 10, 2021
More literature Techniques for PIR-based motion detection Dec. 15, 2020
Technical article Trends in building automation: connected sensors in safety and security Jul. 20, 2016
More literature TIDA-00759 Firmware Mar. 15, 2016

Related design resources

Reference designs

TIDA-00489 Low Power Wireless PIR Motion Detector Reference Design Enabling 10 Year Coin Cell Battery Life TIDA-01069 Advanced Motion Detector Using PIR Sensors Reference Design For False Trigger Avoidance TIDA-01398 Ultra Low-Power Wireless PIR Motion Detector for Cost-Optimized Systems Reference Design

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