Embedded ways to achieve chopper stability

Chopper stabilization is the only way to achieve stability over the operating temperature range for a Hall effect sensor

Truth: Many designers believe the misconception that non-chopper-stabilized parts are not stable. In reality, one of the most important factors contributing to the sensor’s stability starts with the Hall element used by the manufacturer.

Many sensors today utilize single and embedded dual Hall effect elements, which are susceptible to wide ranges of magnetic performance due to packaging stresses. To mitigate these stresses, most manufacturers use an averaging process (chopper stabilization) to provide a more stable operation over embedded voltage and temperature.

Another way to realize stability is to start with a more stable Hall effect element. A quad Hall element is less susceptible to stress-induced error because voltage is measured in four directions, cancelling the offsets in each element to provide stable operation over the operating temperature range. A quad Hall element offers more stable sensor performance, requiring less averaging correction than what chopper stabilization provides. In addition, Hall sensors utilizing this technology are not larger than their single or dual Hall element counterparts using chopper stabilization.

refer to: http://industrial-embedded.com/articles/busting-three-myths-chopper-stabilization/