I use ad7616 in my board.
after operation for a while, my system turned out to be unfunctional.
I checked components on the board and found ad7616 was not functional.
I read out data in Regs of ad7616 after setup, all values were 0x8000.
I tried to read out conversion results after a convst pulse(no busy signal generated by ad7616), all values were 0x8000.
I also have other boards and all works well.
Is my AD7616 broken? how to diagnose？
It was working fine but at some point it stopped working? If so, has it been exposed to any harsh conditions like overvoltage, ESD, etc?
Have you check the AVCC, VDRIVE, REGCAP, VREF, REFCAP…
Have you check the AVCC, VDRIVE, REGCAP, VREF, REFCAP, etc pins are at their expected voltages?