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ADS1198: ADS keeps burning

Part Number: ADS1198
Other Parts Discussed in Thread: ADS1194, , ADS1298




I upload three files : the first one is a schematic I designed, the second is the board and the other is the ADS1194 datasheet. 
I have a serious problem with designing my printed circuit board. It keeps burning after supplying 1.8V for aprox 5mins to my ADS1198. 

I used a bipolar supply operation, and separated analog ground from digital ground. Then I connected them with 0ohm resistor, 

Is there anyone who can give an answer for me?