parameter in LTC2378-20

Hello everyone,

I just need a very fast confirm from someone of you. I am looking at the datasheet of the LTC2378-20

At pag 3 in the "dynamic accuracy section", there is a parameter  called A_IN.

what is that parameter?

My guess is that is the amplitude of the input signal used to extract the other parameters of the ADC. Can you confirm?

if that is the case and assuming VREF=5V: Does it mean that AIN = -1dB => Vinpeak= 4.45V ?