A temperature detector with process compensation and non-linear calibration for battery management systems with HV ESD protection

This paper presents a temperature detector with process compensation and non-linear calibration for battery management systems (BMS) with HV ESD protection. The proposed temperature detector attains process compensation and calibration by using the proposed CTAT and PTAT sensors. The proposed temperature detector must be protected using HV ESD protection in BMS. The proposed temperature detector is implemented using a typical 0.25 μm 1P3M 60V BCD process. The core area of the proposed design is 0.1 mm². In the range from -40 °C to 140 °C, the worst deviation of the temperature detector is -2.16 °C ~ +1.98 °C at FF, TT, and SS corners. The maximum non-linearity reduction of CTAT and PTAT sensors are 9% and 41%, respectively.