Hall Effect sensors are typically offered at multiple sensitivity levels. Since magnetic field components tend to have unequal amplitudes, it is typically best to select a threshold as close to the zero cross point to achieve the best quadrature alignment. At the zero cross point, field vector components will still be aligned 90° out of phase regardless of amplitude mismatch.

Based on this, typically the lower threshold option would provide the best performance. What must be considered, however, is whether or not stray external magnetic fields may also be present. In some applications, it is not uncommon to observe small magnitude fields from other sources. In this case, it may be advantageous to select a sensitivity option with a higher maximum B_OP threshold to provide better immunity to these sources while still maintaining a relatively low trigger point.