A 62.6-pJ/Conversion Temperature Sensor with a Capacitor Voltage Division
Bumjin Park, Youngwoo Ji, Jae‐Yoon Sim · JSTS Journal of Semiconductor Technology and Science · 2021
This paper presents an ultra-low-power temperature sensor that detects the temperature with a leakage-based bandgap circuit and converts it with an asynchronous SAR ADC. The implemented temperature sensor consumes 487 ㎺ at 20℃ with an energy efficiency of 62.6 pJ/conversion. A 1-point and 2-point calibrations show peak-to-peak inaccuracies of -3.43/+2.77 ℃ and -1.63/+1.63℃, respectively, in a temperature range of -30-to-100 ℃. The supply sensitivity is 0.61 ℃/V at 20 ℃.