But it's a DAC... not an amp!
Its purpose is to convert what is digital into analogue... and a vinyl turntable is already analogue.
So there's no reason (and no possibility) of plugging an analogue source into it.

I think that would work in principle. But it only has an analogue cinch output. So it won't work with a record player with an analogue output. As far as I know, there are only digital inputs. The record player would therefore have to have an optical, coaxial or USB output. Whether the record player still makes much sense is another question.