dng converter and cr are two different programs.
while they both do the same thing, the dng converter is a stand-alone app that does not install into another adobe program and cr installs into another adobe app like photoshop, lightroom etc.
and the latest version (as of 6/25/14) is cr 8.5.
download the dng converter is you have an app that's to old to accept cr 8.2 (or cr 8.5).
The DNG Converter is a separate standalone program, not a plug-in for Photoshop, so you need to download and install it separately if you need to use it.
BTW, the latest camera-raw version of 8.5, at least if your OS is new enough.
You can get the DNG Converter from http://www.adobe.com/downloads/updates