Hi everyone!

IŽm in need to read a ratiometric hall effect sensor from Allegro (UNG3503), with a PIC12F675 and a minimum of components because of the space available.
This sensor outputs half Vdd when no magnetic field is detected (i.e. 2,5V), and increase/decrease 1,3 mV/Gauss.

Is there any "hint" to obtain readings as low as 1 Gauss only using sensor + pic, or IŽll have to use an amp.op also?

Txs