18.2 A 16fJ/Conversion-Step Time-Domain Two-Step Capacitance-to-Digital Converter - Xiyuan TANG; Li, Shaolan; Shen, Linxiao; Zhao, Wenda; Yang, Xiangxing; Williams, Randy; Liu, Jiaxin; Tan, Zhichao; Hall, Neal; Sun, Nan (2019 IEEE International Solid- State Circuits Conference - (ISSCC), 2019)