An Analog Front-End Employing 87 dB SNDR Stochastic SAR-ADC for a Biomedical Sensor

The present paper introduces a novel ADC for biomedical sensors that embeds successive-approximation register ADC and stochastic flash ADC operations. The ADC in the analog-front-end IC fabricated in a 130-nm CMOS process demonstrated 87 dB SNDR for a 20.5 Hz input signal at an oversampling rate of 250 kS/s with calibration by a supervised machine learning technique.