AutoCAD itself has a command called or the Raster Design toolset (an add-on).
When you run a JPG through a converter, you are asking the software to perform an act of digital archeology. The converter must peer through the "noise" of the pixels to find the intent of the original designer: Line Detection: jpg to dwg converter
Reliable for small files, though it lacks advanced settings for line smoothing or layer management. AutoCAD itself has a command called or the