Trengove was charged with a level three engaging in rough conduct offence against Adelaide's Patrick Dangerfield in the third quarter of Melbourne's win on Sunday.
Dangerfield was helped from the ground and was immediately substituted off after hitting his head on the ground in a Trengove tackle.
The incident was assessed as negligent, high contact and based on a medical report from the Crows, was also classified as high impact, drawing 325 demerit points and a three-match ban.
An early plea reduces the sanction by 25 per cent to 243.75 and a two-match ban.
