Low power and more accurate temperature sensor with an integrated dual slope AD converter

A digital temperature sensor with an integrated dual slope ADC is recently proposed. In the present study, a smaller digital temperature sensor is realized by integrating a dual-slope capacitor, which is usually attached to an integrated circuit device. A proper designed circuit can supply a voltage of 2.3 V and a consumption current of 50 μA. Adopting the CV characteristics of the MOS capacitor allows the sensing accuracy to be improved by 0.5°C.