Description
The A1150, A1152, A1153, A1155, A1156, A1157, and A1158 comprise a family of two-wire, unipolar, Hall-effect switches, which are factory-trimmed to optimize magnetic switchpoint accuracy. These devices are produced on the Allegro® advanced BiCMOS wafer fabrication process, which implements a patented high frequency, 4-phase, chopper-stabilization technique. This technique achieves magnetic stability over the full operating temperature range, and eliminates offsets inherent in devices with a single Hall element that are exposed to harsh application environments.

Features and Benefits
◾ High speed, 4-phase chopper stabilization
◾ Low switchpoint drift throughout temperature range
◾ Low sensitivity to thermal and mechanical stresses
◾ On-chip protection
    ▫ Supply transient protection
    ▫ Reverse battery protection
    ▫ On-board voltage regulator
    ▫ 3.0 to 24 V operation
◾ Solid-state reliability
◾ Robust EMC and ESD performance
◾ Industry leading ISO 7637-2 performance through use of proprietary, 40-V clamping structures