Thank you for your answer!

Finaly I can run the MLX90333 sensor in analog mode (X and Y) with my arduino UNO. It's very easy! CT
So I should be able to make it work as a potentiometer :-) It's 10bits mode (1024) with my teensy 2.0++ but I can add an ADC for full 12bits resolution!

I dont't have now my teensy I'm hurry to test it!