A1193 Datasheet | Allegro MicroSystems

A119x and A119x-F Programmable, Chopper-Stabilized, Two-Wire Hall-Effect Switches Features AND BENEFITS - Choice of factory-set temperature coefficient (TC) for use with ferrite or rare-earth magnets - Field programmable for optimized switchpoints - AEC-Q100 automotive qualified ▫ On-board voltage regulator: 3 to 24 V operation - 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 ▫ Industry-leading ISO 7637-2 performance through use of proprietary, 40 V clamping structure - Solid-state reliability - Robust EMC and ESD performance - UB package with integrated 0.1 µF bypass capacitor PACKAGES 3-pin SOT23-W 2 mm × 3 mm × 1 mm (suffix LH) 3-pin ultramini SIP 1.5 mm × 4 mm × 3 mm (suffix UA) 2-pin ultramini SIP 1.5 mm × 4 mm × 4 mm (suffix UB) Not to scale DESCRIPTION The A119x and A119x-F prise a family of two-wire, unipolar, Hall-effect switches, which can be trimmed by the user at end-of-line to optimize magnetic switchpoint accuracy in the application. The latter (-F option) are temperature-pensated for use with ferrite magnets. These devices are produced on the Allegro™ advanced Bi CMOS wafer fabrication process, which implements a 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. The A119x and A119x-F family has a number of automotive applications. These include sensing seat track position, seat belt buckle presence, hood/trunk latching, and shift selector position. Two-wire unipolar switches are particularly advantageous in cost-sensitive applications because they require one less wire for operation versus the more traditional open-collector output switches....