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您好!我在使用DAC81408输出8路±10V的模拟信号。在供电方面前级输出了隔离的模拟5V和±10V,在为DAC81408供电和接地方面如何对数字和模拟进行有效隔离?
期待您的回复
Hello! I am using DAC81408 to output 8 ±10V analog signals. In terms of power supply, the preamp outputs isolated analog 5V and ±10V. How to effectively isolate digital and analog in terms of power supply and grounding for DAC81408?
Sincerely, looking forward to your reply
您好,
没明白你的意思,你具体说的是哪些信号间的隔离?
如果你指的是数字电路和模拟电路分开布局的问题,建议你查看下面FAQ:
[FAQ] PCB Layout Guidelines and Grounding Recommendations for High-Resolution ADCs
是的,DAC81408的GND 没有区分AGND和DGND。我建议你将DAC81408的GND接模拟地,打开下面链接你搜索“具有低数字电流的混合信号IC的接地和去耦”,建议你阅读下这部分内容,有解释原因。
https://zhuanlan.zhihu.com/p/523676921