The A1157LUA-T is a two-wire, unipolar Hall-effect switch from the A115x family, fabricated using a 4-phase chopper-stabilized BiCMOS process for low switchpoint drift across temperature. It operates from 3 to 24 V, is AEC-Q100 automotive qualified, and supports an ambient temperature range of -40°C to 150°C. The device is packaged in a 3-pin ultra-mini SIP (UA) through-hole style, measuring 1.5 mm × 4 mm × 3 mm, with integrated supply transient and reverse-battery protection. It provides diagnostic capability through continuous output current flow, restricted to two narrow ranges.
The A115x family provides a cost-effective solution for two-wire Hall-effect switching, with chopper stabilization for enhanced temperature stability and a variety of package options for design flexibility.
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Datasheets
Digital Switch Unipolar Switch Current Source Hall Effect 3-SIP
| Allegro MicroSystems Inc. | DigiKey | |
|---|---|---|
| Product Category | Proximity Sensors | Proximity Sensors |
| Product Number | A1157LUA-T | 620-1409-ND |
| Product Name | Chopper-Stabilized, Two-Wire Hall-Effect Switch | Switches (Solid State) |
| Sensor Technology | Hall Effect Proximity Sensor | Hall Effect Proximity Sensor |
