It's a picture format. Op - I think the only way to do this would be to take the picture then convert it, which I don't think is really what you're looking for.
The sensers in smartphones are too small to capture uncompressed photos. You really would not want to anyway. One photo would take up way too much space.
Uncompressed photos have nothing to do with the quality of the sensor in the camera, just whether or not the app used makes a compressed output file. And if you have a 64GB phone you could store several hundred TIFF photos before coming to the device storage limit. most memory cards only go up to 128GB anyway, so why would this be any different?
The OP is probably going to be best off dropping $3 on the 645 PRO camera app.