A wide dynamic range, high-resolution multi-step SAR CDC for implanted humidity sensors

• Published in: Biomedical Circuits and Systems Conference pp. 1 - 5
• Main Authors: Wei, Yingbo, Zheng, Huiyong, Liu, Xiao
• Format: Conference Proceeding
• Language: English
• Published: IEEE 24.10.2024
• Subjects: Capacitance; Capacitance-to-digital converter (CDC); Capacitive digital-to-analog converter (CDAC); Capacitive sensors; Feature extraction; High dynamic range; Humidity; oversampling; Phase measurement; Quantization (signal); Registers; Sensor phenomena and characterization; Simulation; successive approximation register (SAR)

This paper proposes a wide dynamic range, high-resolution multi-step successive-approximation-register-based capacitance-to-digital converter (CDC) designed for characterizing implanted humidity sensors. The CDC features three conversion phases: a coarse phase with a LSB =100 \mathrm{fF} for canceli...