LM35 trouble with YUN

I'm in trouble with a LM35DZ sensor. The sensor is perfectly working on my Arduino Uno, linear and precise, but when I try to use it on Arduino YUN, it is no more precise nor linear.... It's disappointing: same sketch, same sensor... Why does it happen? How can I fix it? lucazac

Arduino Yun 5v pin doesn’t give me 5v, the analog sensor might be suffered.

http://playground.arduino.cc/Main/LM35HigherResolution

LM35HigherResolution, might be work around.