Is an input device where it translates binary coded information from the processor into analog information you can understand?

Answer 1

No, an input device is something that carries data into something. In this case, the processor. This incoming information doesn't have to be analog information coming from a human, but it sometimes is. (E.G. a computer mouse, a computer keyboard) It also could be another electronic device interacting with the computer. (E.G. a flash drive, a phone, an mp3 player).

For a better way of understanding this, here is how input and output work:

Input -> Processor -> Output

Keyboard -> Computer -> Monitor