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 mm2, with an inaccuracy of ±0.37oC over the [-20oC÷80oC] temperature range, and a power consumption lower than 15.5 μW with a conversion speed of 30 ms.