A Background-Calibrated NPN-Based Temperature Sensor with 0.05°C (3σ) Inaccuracy from -70°C to 125°C
Nandor G. Toth (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Kofi A.A. Makinwa (TU Delft - Electrical Engineering, Mathematics and Computer Science)
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Abstract
In this work, an NPN-based temperature sensor is presented that introduces a background-calibration scheme to correct all current-domain errors in its front-end. It achieves an inaccuracy of 0.05°C (3σ) from -70°C to 125°C (RIA=0.05%) after a one-point trim, which represents the state-of-the-art energy efficiency (100fJ∙K2) and power supply sensitivity (PSS) (0.004°C/V).
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