A ±0.15 °C (3σ) Inaccuracy CMOS Smart Temperature Sensor from −40 °C to 125 °C with a 10 ms Conversion Time-Leveraging an Adaptative Decimation Filter in 65 nm CMOS Technology

Author:

Passos Fábio123,Santos Gabriel3,dos Santos Marcelino123

Affiliation:

1. INESC-ID, 1000-029 Lisbon, Portugal

2. Instituto Superior Técnico, Universidade de Lisboa, 1000-029 Lisbon, Portugal

3. Silicon Gate, 1000-029 Lisbon, Portugal

Abstract

This paper presents the design and implementation of a highly accurate smart temperature sensor designed in 65 nm CMOS technology. The sensor exhibits a ±0.15 °C (3σ) error across a wide temperature range from −40 °C to 125 °C, catering to diverse application needs. Leveraging advanced CMOS technology, the sensor employs an adaptive decimation filter that allows us to control the conversion time, ensuring that the accuracy of the conversion is maintained even in challenging conditions. The proposed sensor architecture integrates advanced techniques for temperature sensing for improved accuracy and reliability. Through meticulous circuit design and the usage of dynamic element matching, chopping, and calibration/trimming, the sensor demonstrates exceptional performance characteristics, making it suitable for various industrial, automotive, and consumer electronics applications demanding high precision temperature monitoring.

Funder

GreenChips-EDU project

FCT/MCTES

Publisher

MDPI AG

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