一种用于高精度D/A转换器的数字校准技术  

Digital Static Calibration Technology for 16-Bit D/A Converter

作　　者：朱冬梅[1] 傅东兵[1] 石建刚[1] 杨卫东[1] 刘伦才[1] 李开成[1] 

机构地区：[1]模拟集成电路国家级重点实验室中国电子科技集团公司电子第二十四研究所,重庆400060

出　　处：《微电子学》2010年第1期24-28,共5页Microelectronics

摘　　要：介绍了一种用于400MSPS16位高精度电流舵D/A转换器的数字静态校准技术。该校准技术利用地址产生器、钟控比较器、SAR寄存器和校准DAC,构成逐次逼近式校准环路。利用该校准环路,可以自动完成高7位电流源阵列单元的校准,从而极大地提高电流源的匹配性。采用该校准技术的16位电流舵D/A转换器的DNL大于±0.5LSB,达到了真正的16位精度。A digital static calibration technique for 400 MSPS 16-bit high-resolution current steering D/A converter was described. In this technique, address generator, clock controlled comparator, SAR register and calibration DAC was used to form a successive approximation calibration loop, with which calibration of current source array units could be automatically accomplished one by one, thus greatly improving matehability of current source. The 16-bit current steering D/A converter using this calibration technology had a DNL greater than ±0. 5 LSB, achieving a true 16-bit relative static resolution.

关 键 词：数字静态校准 电流舵D/A转换器 逐次逼近寄存器 

分 类 号：TN792[电子电信—电路与系统]