Anton Yelchin: Death Certificate ... Minimal Suffering

Anton Yelchin did not suffer much before his tragic death this past weekend ... this according to the death certificate obtained by TMZ.

The document restates Anton's death was caused by blunt traumatic asphyxia. It goes on to say his death was "rapid" after impact.

TMZ broke the story ... a source connected with the investigation told us the actor died within a minute of impact, when his jeep pinned his body against a security gate.

The death certificate also states there were no other significant conditions contributing to his death.