analog-digital converter vs analog-to-digital converter

analog-digital converter and analog-to-digital converter both are nouns.

Word	Noun	Adjective	Verb	Adverb
analog-digital converter	Yes	No	No	No
analog-to-digital converter	Yes	No	No	No

As nouns, analog-digital converter and analog-to-digital converter are synonyms defined as:

analog-digital converter and analog-to-digital converter: device for converting analogue signals into digital signals

Other synonyms of analog-digital converter include digitiser, digitizer.

analog-digital converter (noun)	analog-to-digital converter (noun)
device for converting analogue signals into digital signals	device for converting analogue signals into digital signals