A 0.12mm2 Wien-Bridge Temperature Sensor with 0.1°C (3σ) Inaccuracy from -40°C to 180°C
Sining Pan (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Çagrı Gürleyük (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Matheus F. Pimenta (Student TU Delft)
Kofi A.A. Makinwa (TU Delft - Electrical Engineering, Mathematics and Computer Science)
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Abstract
Resistor-based temperature sensors can achieve much higher resolution and energy efficiency than conventional BJT-based sensors [1], but they typically occupy more area (> 0.25 mm 2 ) and have lower operating temperatures (le 125 {circ} {C}) [2]-[4]. This work describes a 0.12mm 2 resistor-based sensor that uses a Wien-bridge (WB) filter to achieve 0.1 {circ} {C} (3 sigma) inaccuracy from - 40 {circ} {C} to 180 {circ} {C}. Compared to a state-of-the-art WB sensor [4], it occupies 6 × less area and achieves comparable relative accuracy over a 76% wider operating range.