I've found a few ATSC digital TV tuner chips (SiLabs, Maxim Integration, NXP) sold via the typical online parts retailers in the USA but they all seem to require contacting sales and signing a NDA to get the full data sheet/documentation. Even if they let a hobbyist sign a NDA, I'm not willing to, so do I have any other options, or am I out of luck?
1) Are there any ATSC chips sold in USA at hobbyist quantity that don't require NDA?
2) Are there any "general-purpose" RF chips that can be interfaced with something else (hardware/software) to tune ATSC even if the general purpose chip isn't specifically for digital tv tuning? (Update: I'm not asking for part numbers, I'm asking for which type of parts can be used.)