My customer has been facing an issue on their target board.
They had already found root cause that they didn't follow power up sequence as described on AD7813 data sheet.
They want to keep low EXT CONVST during Vdd power up, but on the datasheet, there seems no timing information as below.
1) How long EXT CONVST should be kept low during Vdd on?
2) When Vdd is 5V, which level (Threshold) that AD7813 recognize Vdd applied?
Thank you for your help in advance.