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A1150

Allegro MicroSystems
Part Number A1150
Manufacturer Allegro MicroSystems
Description Two Wire Hall-Effect Switches
Published Feb 22, 2015
Detailed Description A1150, A1152, A1153, A1155, A1156, A1157, and A1158 Chopper-Stabilized, Two-Wire Hall-Effect Switches FEATURES AND BEN...
Datasheet PDF File A1150 PDF File

A1150
A1150

Overview
A1150, A1152, A1153, A1155, A1156, A1157, and A1158 Chopper-Stabilized, Two-Wire Hall-Effect Switches FEATURES AND BENEFITS • AEC-Q100 automotive qualified • 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 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 Continued on the next page… 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) Approximate footprint 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 theAllegro™ advanced BiCMOS 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 A115x 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.
Additionally, the system designer inherently gains diagnostics because there is always output current flowing, which should be in either of two narrow ranges.
Any current level not within these ranges indicates a fault condition.
All family...


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