Unlike competitive magnetic sensors, the AS516x and AS526x magnetic positioning sensors by ams OSRAM require very few external components, and can be used with a low-cost ferrite magnet. They also require no external shielding, since they are immune to stray magnetic fields thanks to proprietary differential-input technology developed by ams OSRAM. The devices are tolerant of magnet misalignment and of variances in the air gap from one unit to another. These devices therefore offer vehicle manufacturers low bill-of-materials and assembly costs. The rigorous ISO26262 standard for automotive functional safety requires vehicle manufacturers to achieve high levels of reliability, to analyze the effects of the failure modes of components and systems, and to take measures to guarantee functional safety in the event of a predictable failure.