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TMS320F280048C-Q1: 应用片载ADC采集模拟量信号的接地问题?

Part Number: TMS320F280048C-Q1

群里的大神,如果应用TMS320F280048C-Q1片上ADC进行模拟量采集,模拟信号的地线和数字信号的地线应该怎么处理?如果系统在应用模拟量输入的同时又要运用闲置的模拟量输入引脚用作数字输入AIO功能,此时的地线应该怎么处理?麻烦群里的大神解答一下啊,谢谢!!!