An ultra-low power custom IoT node for gas sensing applications

Environmentally friendly devices production is increasing in today's society due to the obvious need of a cleaner ambient, also, for the same reason of a necessity of a higher control of our surroundings, gas sensors have become important subject of research, especially lately with notably progress in low power photo-activated sensors. To contribute further with the development of eco-friendly devices, here we present a first prototype based on two ASICs developed in 180 nm with a low power consumption of 70 mu W capable of driving and measuring a light-activated gas sensor at a sample rate of one second while sending the data through a Bluetooth transceiver. Due to the low power achieved, the system can be supplied by an energy harvester to make the device fully autonomous and self-sufficient.