Using a gamepad to play Atari 5200 games in Retroarch

I know this has been asked before, but someone has successfully used a standard gamepad to play Atari 5200 games using Retroarch? The main problem with this console is the use of an analog control. I cannot play many games because the control is too responsive.

I also have the same problem with MAME trying to emulate the console.

The other question is if it’s possible to remap the keypad of the Atari 5200 controller to one of the analog sitcks of a standard gamepad.

Thanks in advance.