Vinh/Vinl of AD7476A and AD7476B

Hello,

I have a question about logic voltage of AD7476A and AD7476B.

http://www.analog.com/en/analog-to-digital-converters/ad-converters/ad7476/products/product.html

Pls tell me the Vinh & Vinl when using VDD = 2.5V.

The data-sheet does not describe it. Pls refer to page3.

It would be greatly appreciated if advice could be gotten.

Best Regards,