Temperature sensors intended for embedded applications should be both energy- and area-efficient. The combination of Wheatstone-bridge (WhB) sensors and continuous-time ADCs has proven to be highly energy efficient [1,2]. However, their area (> 0.25mm 2 ) is still larger than that of comparable BJT-based sensors [3,4]. This paper presents a temperature sensor that uses an FIR-DAC ADC to reduce its area and increase energy-efficiency, both by 2× compared to the state-of-the-art [5].