This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: ADS125H02
我给ADS125H02施加的电源是DVDD=3.3V，AVDD=5V，结果发现DVDD变成了4.1V。这是为什么呢？我断开DVDD供电，单独测量为3.3V，供电正常，但一加到ADS125H02上，就变成了4.1V。我把AVDD不加电的话，DVDD为3.3V，正常。
您好，已经收到了您的案例，调查需要些时间，感谢您的耐心等待。
您好
I'm not sure what to do with this information
Are they using the EVM? Have they designed their own board?
How are they powering HVDD and HVSS?
Any other details the customer can provide?
We designed ourself board. HVDD is powered with ＋13.5V。HVSS is powered with -13.5V。关键问题是AVDD为什么会倒灌到DVDD？器件本身就是这样吗？
DVDD我用DC/DC电源供电，电压值为＋3.3V，结果AVDD一加电后，DVDD就变成了4.1V，ADS125H02可能还能忍受，但我的DVDD还接到了其它供电要求3.3V的器件上，如FPGA，而FPGA在4.1V 供电情况下无法正常工作。
不，这并非ADC应有的行为，即正常工作的设备不会加载DVDD引脚。例如，你可以测量ADS125H02EVM的DVDD引脚，其电压应为3.3V而非4V。
这听起来像是系统中某个环节出了问题。可能是焊接问题或供电问题。我建议先将板上的H02设备隔离，然后用台式电源供电。假设模数转换器（ADC）未损坏，你应该能观察到供电稳定。接着，逐步将板级电源重新连接到ADC，观察DVDD何时开始加载
