10.3 A 0.12mm2 Wien-Bridge Temperature Sensor with 0.1°C (3σ) Inaccuracy from -40°C to 180°C

Resistor-based temperature sensors can achieve much higher resolution and energy efficiency than conventional BJT-based sensors [1], but they typically occupy more area (>0.25mm
²
) and have lower operating temperatures (≤125°C) [2-4]. This work describes a 0.12mm
²
resistor-based sensor that uses a Wienbridge (WB) filter to achieve 0.1°C (3σ) inaccuracy from -40°C to 180°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.