About ADCMP572 hysteresis

Hi,

My customers are considering using ADCMP 572.

I got a question about hysteresis of ADCMP 572.

#1  It is about ± 25 mV, but can you tell me what extent of error is there?

#2  Is hysteresis about ± 25 mV relative to the amplitude of the differential signal (VP - VN)? Or is it a value with

   respect to the amplitude of the single signal (VP or VN), which is about ± 50 mV in total?

Best Regards

Yuya