AD7779 input current limit and power sequence

The AD7779 DS warns of device damage if analog input exceeds AVSSx+100mV or AVDD1x-100mV. If we cannot fully control input voltage limits, is there a current threshold we can design to that would prevent damage to the part?

Also, does the AD7779 require power sequencing as shown on the evaluation board where AVDDx rises before IOVDD?