An Integrated Low Power Temperature Sensor For Food Monitoring Applications

This paper describes the design of a temperature sensor in 65-nm CMOS technology, intended for food monitoring in IOT and RFID contexts. The digitally-assisted readout scheme combined with a reduced design complexity in the PNP BJT sensor analog front-end allows the minimization of the power consumption. The full sensor occupies an area of 0.26 mm(2), with an inaccuracy of +/-0.37 degrees C over the [-20 degrees C divided by 80 degrees C] temperature range, and a power consumption lower than 15.5 mu W with a conversion speed of 30 ms.