A 0.148nJ/conversion 65nm SOTB temperature sensor LSI using thermistor-defined current source

Abstract

This paper presents an ambient temperature sensor LSI utilizing a thermistor which defines the current of the CCO (current controlled oscillator) on 65nm SOTB process. The temperature sensor measures the ambient temperature with the power consumption of 531nW and 0.148nJ/conversion. This occupies an area of 5863μm². The measurement temperature range was from −50 ° C to 50 ° C, and the resolution was 0.04 ° C.