测试时,把AINP,AINN和AGND短接在一起,基准源用的是REF3125,MCU读出来的短路噪声数据如上图所示,目测短路噪声的峰峰值差不多到了1mV,这实在是太高了,不知道为何,大神们做出来的板子一般底噪大概可以到什么水平?
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