AD7924 SPI error

Hi guys.

I bought a little AD7924.

I tried to use it, but it did not work well.

Several experiments have shown that the CSB and DIN (MOSI) of the SPI interface are reversed from the datasheet.

I would like to know if the AD7924 I purchased is faked or defective.

The chip is marked as follows.



# 551

Please answer.