We will look into this, I'll contact the product owner and get back to you.
In reality it is faster than that, as you don´t need 1 second in between samples, but 1/ODR. So it would take roughly 52428 seconds to do an all codes test. We do this for characterization, checking for functionality, etc.
However, Sigma-Delta ADCs, has opposed to SAR ADCs, due to the its architecture (modulator + digital filter) this all-codes test adds no more value in production, so smaller number of DC points/voltages may be used. Please find more info on Sigma Delta principles here: