Reference Design to Extend Coin Cell Battery Run Time in Wireless Ultrasonic Gas Leak Detector
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Key Document


This reference design demonstrates a low-power wireless sensor which detects gas leaks by analyzing the ultrasonic spectrum for particular signatures. The system is designed to operate from a single Li-Primary coin cell and communicate wirelessly to a base station, which removes all requirements for wiring and enables easy installation. The design incorporates an ultra-low-power battery fuel gauge to accurately predict battery health and provide advance notice of upcoming end-of-life for scheduled battery replacement.

  • Accurate li-primary battery gauging enables extended lifetime and predictable maintenance
  • Uses multiple power domains to optimize system current consumption
  • System diagnostics available for precision power evaluation during development
  • Over three years of operation on coin cell battery ehen sensing every 30 seconds
  • Leak detection independent of gas type; does not require concentration of gas to contact sensor

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ35100  Battery fuel gauge for non-rechargeable batteries (lithium primary) and end-of-service monitor  Battery management ICs  Sample & Buy View Design Kits & Evaluation Modules
CC1310  SimpleLink™ 32-bit Arm Cortex-M3 Sub-1 GHz wireless MCU with 128kB Flash  Wireless connectivity  Sample & Buy View Design Kits & Evaluation Modules
CSD13201W10  12-V, N channel NexFET™ power MOSFET, single WLP 1 mm x 1 mm, 34 mOhm  MOSFETs  Sample & Buy Not Available
TLV320AIC3256  Very Low-Power Stereo Codec with miniDSP and DirectPath™ HP Amplifier  Audio converters  Sample & Buy View Design Kits & Evaluation Modules
TPS61070  Adjustable, 600-mA switch, 1200-kHz boost converter in ThinSOT-23 with power-saving mode  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS731  150-mA, high-accuracy, ultra-low-dropout voltage regulator with reverse current protection & enable  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ35100 Download
CC1310 Download Download
Download Download
Download Download
TLV320AIC3256 Download Download
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TPS61070 Download Download
TPS731 Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 3174 01 Dec 2017
Design files (6)
Title Type Size (KB) Date
ZIP 565 15 Jan 2018
ZIP 704 15 Jan 2018
PDF 1267 15 Jan 2018
PDF 198 15 Jan 2018
PDF 67 15 Jan 2018
PDF 250 15 Jan 2018
Related Tools & Software

Hardware development (2)

Name Part Number Tool Type
SimpleLink™ Sub-1 GHz CC1310 wireless MCU LaunchPad™ development kit  LAUNCHXL-CC1310  Evaluation board 
bq35100 Lithium Primary Cell Evaluation Module Using End-of-Service Monitor Gas Gauging  BQ35100EVM-795  Evaluation board 

Software development (1)

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