Always-on Low-power Gas Sensing with 10+ Year Coin Cell Battery Life Reference Design


Design files


This reference design uses nano-power operational amplifiers, comparators, system timers, temperature sensors and the SimpleLink™ ultra-low power 2.4-GHz wireless microcontroller (MCU) platform to demonstrate an ultra-low power carbon-monoxide 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 gas detection or air quality monitoring. The carbon monoxide detector has sensitivity up to 1000 ppm with a standby current of 1.07 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 ultra-low-power design resulting in 10-year battery life from a single CR2032 coin cell
  • Carbon monoxide gas sensor and analog logic always powered on to enable continuous monitoring and fast response times
  • Bluetooth® Low Energy (BLE) wireless connectivity reduces installation costs and allows multiple sensors to communicate with a single host
  • Self-check and end-of-life monitoring recognizes malfunctioning gas sensor and reports status every five minutes (configurable)
  • Carbon-monoxide gas detection range of 0 to 1000 ppm with ±15% accuracy
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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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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
Digital temperature sensors

TMP103±2°C Digital temperature sensor with I2C/SMBus capable of 1.4V in WCSP

Data sheet: PDF | HTML
ESD protection diodes

TPD1E10B0612-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

Data sheet: PDF | HTML
Precision op amps (Vos<1mV)

LPV811Single Channel 450nA Precision Nanopower Operational Amplifier

Data sheet: PDF | HTML
Real-time clocks (RTCs) & timers

TPL5111Ultra low power system timer (35 nA) for power gating in duty cycled applications

Data sheet: PDF | HTML

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Technical documentation

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Type Title Date
* Design guide Low-Power Carbon Monoxide (CO) Detector BLE 10-Year Battery Life Design Guide (Rev. C) Nov. 13, 2017
Application note Extend Battery Life and Simplify Calibration in Gas Sensing Applications (Rev. A) Feb. 06, 2018
Technical article Collecting environmental data with less energy and wiring May 23, 2017
Technical article Increasing battery life in IoT devices May 05, 2017
Technical article How to improve IoT designs with a nanopower EMI-tolerant op amp Nov. 09, 2016
Technical article Trends in building automation: connected sensors for energy efficiency Feb. 17, 2016

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