Here is a plan for visitors; from TIM.

http://www.tim.com.br/rj/para-voce/p...go/tim-visitor

I see the offer runs from May to end November 2016, don't know if it will go beyond.

Specifically mentions a passport to get it.

I suspect you would need to go to a larger TIM store for them to know about it.

Also, this appears pretty comprehensive, and current, on data plans:

http://prepaid-data-sim-card.wikia.com/wiki/Brazil

I think has been posted before.