Patent ID: 11674855

Abstract:
A temperature-to-digital converter includes a temperature sensor circuit, an analog-to-digital converter (ADC), and a digital processing circuit. The temperature sensor circuit is configured to generate first and second complementary-to-absolute-temperature (CTAT) voltages based on a sensed absolute temperature. The ADC is configured to receive the first and second CTAT voltages. Further, during first and second conversion cycles of the ADC, the ADC is configured to receive the first and second CTAT voltages, and generate first and second digital voltages, respectively. The first and second digital voltages are generated based on the first and second CTAT voltages, respectively, and a difference between the first and second CTAT voltages. The digital processing circuit is configured to generate, based on the first and second digital voltages, a temperature output voltage that is independent of a gain of the ADC and a digital representation of the absolute temperature.