Does the A3212 require any external circuitry?
It is strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor IC) between the supply and ground pins of the device to reduce both external noise and noise generated by the chopper-stabilization technique. Additional circuitry may also be required if there are any transients on the line or if reverse battery is possible in the application. The absolute maximum voltage for this part is 5 V and there is no reverse battery protection.
