A High Precise Reference for SAR ADC

摘要：

A high precise bandgap is proposed and applied toa successive approximation register (SAR) analog-to-digital converter (ADC) used in the touch screen control system,which has a significant requirement of stability. Thus a lot of efforts were put into improving the precision and the reliability of the reference. As results, a high precise CMOS bandgap voltage reference circuit which is compatible with SMIC 0.35 μm CMOS technology is proposed. The error sources in bandgap voltage reference are analyzed, and the precise mathematical expressions and the corresponding improvement methods are presented. The results show that the temperature coefficient is 16.9 ppm/℃ over -40~85℃ and the power supply rejection ratio is -71dB at 100Hz

关键词： SAR ADC bandgap reference temperature coefficient high precise PSRR

作者: Zhou Xueping Luo Li Gao Xuelian

作者单位: School of Electronics and Information Engineering,Beijing Jiaotong University Beijing 100044,China

会议类型: 国际会议

会议名称: 第八届国际电子测量与仪器学术会议(Proceedings of 2007 8th International Conference on Electronic Measurement & Instruments)

会议地点: 西安

会议语种:英文

在线出版日期: 2007-08-16（万方平台首次上网日期，不代表论文的发表时间）