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TIDA-00756

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

Design files

TIDA-00756

Design files

Overview

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.

Features
  • 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.

download Design guide — TIDA-00756
TIDUBX8C.PDF (3087 K)

Reference design overview and verified performance test data

download Schematic — TIDA-00756
TIDRMO0A.PDF (1042 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDA-00756
TIDRMO1A.PDF (82 K)

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

download Assembly drawing — TIDA-00756
TIDRMO2A.PDF (2051 K)

Detailed overview of design layout for component placement

download CAD/CAE symbol — TIDA-00756
TIDRMO4A.ZIP (1916 K)

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

download Gerber file — TIDA-00756
TIDCCE2A.ZIP (812 K)

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

download PCB layout — TIDA-00756
TIDRMO3A.PDF (2341 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Comparators

TLV3691 — Nanopower, 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

TPD1E10B06 — 12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

Data sheet: PDF | HTML
Low-power 2.4-GHz products

CC2650 — SimpleLink™ 32-bit Arm Cortex-M3 multiprotocol 2.4 GHz wireless MCU with 128kB Flash

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

LPV811 — Single Channel 450nA Precision Nanopower Operational Amplifier

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

TPL5111 — Ultra low power system timer (35 nA) for power gating in duty cycled applications

Data sheet: PDF | HTML

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Software

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 brief 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 PDF | HTML May 23, 2017
Technical article Increasing battery life in IoT devices PDF | HTML May 05, 2017
Technical article How to improve IoT designs with a nanopower EMI-tolerant op amp PDF | HTML Nov. 09, 2016
Technical article Trends in building automation: connected sensors for energy efficiency PDF | HTML Feb. 17, 2016

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