The A119x and A119x-F are produced on the Allegro advanced BiCMOS wafer fabrication process, which implements a patented high-frequency, 4-phase, chopper stabilisation 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.
This new package option eliminates the need for an external capacitor and the associated PCB, saving size, component-count, and assembly cost and significantly simplifying the design process. The latter (-F option) devices are temperature compensated for use with ferrite magnets.
The A119x and A119x-F family was developed for use in automotive and industrial applications that value safety or involve long sensor wiring harnesses. These include sensing seat track position, seat belt buckle presence, hood/trunk latching, and shift selector position.
All family members are offered in three package styles. The LH is a SOT-23W style, miniature, low-profile package for surface-mount applications. The UA is a 3-pin, ultra-mini, single inline package (SIP) for through-hole mounting. The UB is a 2-pin, ultra-mini, single inline package (SIP) with an integrated capacitor for through-hole mounting or welding directly to connector pins, eliminating the PCB entirely. All three packages are lead (Pb) free, with 100% matt-tin leadframe plating.
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