Hello, I am reading datasheet for AD592, I am interested in AD592AN as BN and CN are too expensive.

when looking on page 3 at total error vs temperature graph i notice there are three curves per graph and I do not understand or see explained anywhere what each curve represents.

there is also interesting and useful graph on the following page however only for AD592CN but nothing for AN

please if anyone can explain to me, i simply want to know the maximum error range for each temperature, but also wish to understand better to read datasheets. thanks to you all in advance

If you are not understanding my question please ask me I will try to explain more clearly.