A trimming technique for capacitive SAR ADC as sensor interface

作     者：刘珂 杜占坤 邵莉 马骁 

作者机构：Institute of Microelectronics Chinese Academy of Sciences 

出 版 物：《Journal of Semiconductors》 (半导体学报（英文版）)

年 卷 期：2015年第36卷第12期

页      面：128-134页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 080902[工学-电路与系统] 08[工学] 080202[工学-机械电子工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(No.61204034) 

主　　题：SAR ADC trimming sensor CMOS 

摘      要：This work presented a trimming technique and algorithm applied in a capacitive successive approximation register（SAR） analog to digital converter（ADC） for a sensor interface, which can be integrated with the preceding sensor and the following controlling circuit. Without spending a special calibration phase or adding complicated functions, this circuit keeps a 12-bit resolution by trimming the capacitor array. Its merits of low power and small area make it suitable to be embedded in a power and cost sensitive system such as a battery-supplied sensor network node. The prototype 12-bit ADC is implemented by 0.5 m 2P3M CMOS technology, with the wide supply range of 2–5 V, its power consumption is only 300 A at a sampling speed of 200 kHz.