Is my AD7616 broken? how to diagnose?

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?



adding tags
[edited by: Lluis at 5:35 PM (GMT -4) on 23 Aug 2020]