In my recent project, I used the combination of AD8253 and AD7606 to collect analog signals. It is pointed out in the datasheet of the device AD8253 that an anti-aliasing filter (RC filter) should be placed between AD8253 and AD7612. The specific description is shown in the figure below. Now, since AD7606 has built-in input buffer and anti-aliasing filter, is this external RC filter still necessary?
What I want to say is, if it is not necessary then I don’t need to add this part. :)