TIDA-01519: Fire & Carbon Monoxide Alarm Detector Reference Design with Low BOM Cost


This reference design is a carbon monoxide (CO) and fire alarm detector reference design which can identify typical alarm sounds, and has the wireless capabilities to alert the user if one is detected. This design is intended for home automation and "smart" environmental sensing. Once a 3kHz or 520Hz signal frequency is identified based on FFT power spectral density analysis, this system determines whether an alarm is occurring which can then be used with sensor to cloud to alert the homeowner in the case of an alarm outside of their detectible hearing range.


  • 3kHz and 520Hz alarm target frequencies

  • CO and fire alarm detection

  • Low BOM cost design

  • Variable microphone gain based on proximity to alarm

  • Sub-1GHz wireless communication enabled for sensor to cloud configuration


Manufacturer Texas Instruments
Category Sensor Solutions
Sub-Category Other Sensing Solutions
Eval Board Board not Stocked
Purpose Carbon Monoxide (CO)
Smoke Detector Interface
Range >10 ft (dependent on gain settings)
Sensing Method Microphone
Voltage In 3.7 VDC
108 ~ 132 VAC
Features AC/DC Power Supply
Antenna On-Board
Design Author Texas Instruments
Component Count + Extras 127 + 41
Main I.C. Base Part CC1310
Date Created By Author 2017-10
Date Added To Library 2018-07