In general these two pins should be joined together and to the analogground of the system.
通常,这两个引脚应该就近连接后再接模拟地。
2
The labels "analogground" and "digital ground" on these pins refer to the parts of the converter to which the pins are connected, and not to the system grounds to which they must go.
引脚标记说明该引脚已连接到芯片内部的哪个部分,并非要把该引脚连接到电路的哪个参考点。
3
Many ANALOG CIRCUITs scale their input and OUTPUT ranges about a ground reference.