A1150, A1152, A1153, A1155, A1156, A1157, and A1158 are dualLine unipolar Hall-effect switchseries, factory adjusted for the highest magnetic switchpoint accuracy. These devices go through Allegro®Advanced BiCMOS wafer fabrication process, manufactured using its proprietary high-frequency four-phase chopper stabilization technology. This technology provides magnetic stability relative to all operating temperatures and eliminates the inherent offset of single-Hall element devices for harsh application environments.
The A115x Series has a variety of automotive applications. Includes sensing seat track position, seat buckle presence, hood/trunk locking, and shift selector position.
becauseTwo-wire unipolar switchWith less wire than conventional open-collector switches, two-wire unipolar switches are particularly suitable for cost-sensitive applications. Moreover, the system designer always has diagnostic information because the output current must always be within two narrow ranges. Any current level that is not in these two ranges indicates a fault.
All products are available in two package types. LH is a SOT-23W miniature low profile package for surface mount applications. UA is a three-pin ultra-small single in-line package (SIP) for via mounting. Both packages are lead (Pb) free and feature 100% matte tin coated leadframes.
- High-speed four-phase chopping is stable
- Low switchpoint drift relative to temperature range
- Low sensitivity to thermal and mechanical stress
- Chip protection
- Power transient protection
- Reverse battery protection
- On-board voltage regulator
- 3.0 to 24 V operating voltage
- Solid-state reliability
- Robust EMC and ESD performance
- Industry-leading ISO 7637-2 performance using a proprietary 40-V clamping structure