Thank you for answer
I solve the problems
I didn't connect VxGND to AGND...TT
After, I connect VxGND to AGND, voltage shift and saturation problems were solved
And, I used AD7606-4.... I thought it is AD7606...
When I bought AD7606, name was so similar AD7606 and AD7606-4...TT
Thanks again!! you're genius!!! lol