ADC器件的地

A D C 器件的“地” (仅供内部使用） For internal use only 2006 目 录Table of Contents 1 ADC器件的“DGND PIN”和“AGND PIN”.......................................................................... 5 1.1 问题 ................................................................................................................................. 5 1.2 仿真 ................................................................................................................................. 6 1.3 理论分析 .......................................................................................................................... 8 2 “DRGND”............................................................................................................................... 9 3 地平面要不要分割................................................................................................................ 10 4 ADC器件的去耦................................................................................................................... 14 4.1 PSRR............................................................................................................................. 14 4.2 改善电源地噪声方法 ...................................................................................................... 15 5 高速高精度ADC器件PCB设计准则：................................................................................... 16 6 参考资料清单： ................................................................................................................... 17 2006-08-17 第2页,共17页Page 2 , Total17 图目录 List of Figures 图1 ADC器件的内部电源地连接示意图........................................................................................ 5 图2 仿真电路............................................................................................................................... 6 图3 某单板中AGND与DGND以磁珠相连接的方式在雷电作...