ADS8864的AVDD和DVDD端应该直接接3.3V电源还是直接通过一个1uF的电容接地?
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AVDD是模拟部分供电
DVDD是数字部分供电
他们必须都接到电源上,同时也必须分别通过电容到地
建议参考我们的EVM的原理图
你按照这个链接
http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=sbau213&fileType=pdf
的17页的图去接就可以了