Automotive Safety Sensor ALLEGRO APS12450LLHALX-1SLA with Three Wire Interface and Magnetic Polarity Options
Product Description
The APS12450 is a three-wire planar Hall-effect sensor IC designed for automotive safety-related systems, developed in accordance with ISO 26262:2011 for ASIL B capability. It features an enhanced three-wire interface with interconnect open/short diagnostics and a fault state for diagnostic communication, maintaining compatibility with legacy systems. Continuous background diagnostics are transparent to the host system, reducing fault tolerant time. Product options include magnetic switchpoints, temperature coefficient, and output polarity, with response adaptable to SmCo, NdFeB, or ferrite magnets. For a functionally equivalent three-wire switch, refer to the APS11450.
Key Features and Benefits
- Functional safety developed to ISO 26262:2011 (ASIL B pending assessment).
- Integrated background diagnostics for signal path, regulator, Hall plate and bias, overtemperature detection, and nonvolatile memory.
- Defined fault state for diagnostic communication.
- Multiple product options for magnetic polarity, switchpoints, hysteresis, temperature coefficient, and output polarity.
- Reduces module bill-of-materials (BOM) and assembly cost by enabling ASIL B sensor to replace redundant sensors and integrating overvoltage clamp and reverse-battery diode.
- Automotive-grade ruggedness and fault tolerance, including extended AEC-Q100 Grade 0 qualification (operation to 175C junction temperature).
- 3 to 30 V operating voltage range with 8 kV HBM ESD protection.
- Overtemperature indication.
- Monolithic ICs with on-chip reverse-battery protection, overvoltage protection (40 V load dump), ESD protection, overtemperature detection, and internal voltage regulator.
- Available in industry-standard SOT23W (LH) and SIP (UA) packages, both RoHS-compliant and lead-free.
Typical Applications
- Automotive and industrial safety systems
- Seat/window motors
- Sun roof/convertible top/tailgate/liftgate actuation
- Brake and clutch by wire actuators
- Engine management actuators
- Electric power steering (EPS)
- Transmission shift actuator
Product Attributes
- Brand: Allegro MicroSystems
- Origin: U.S.A.
- Certifications: ISO 26262:2011 (ASIL B capability pending assessment), AEC-Q100 Grade 0 qualified
- Material: Monolithic ICs
- Color: Not specified
Technical Specifications
| Part Number | Package | Output Polarity | Temperature Coefficient | Magnetic Operate Point, BOP (typ) | Packing |
|---|---|---|---|---|---|
| APS12450LLHALX-0SLA | 3-pin SOT23W surface mount | Low | 0%/C | 22 G | 13-in. reel, 10,000 pieces/reel |
| APS12450LLHALT-0SLA | 3-pin SOT23W surface mount | Low | 0%/C | 22 G | 7-in. reel, 3000 pieces/reel |
| APS12450LUAA-0SLA | 3-pin SIP through-hole | Low | 0%/C | 22 G | bulk, 500 pieces/bag |
| APS12450LLHALX-1SLA | 3-pin SOT23W surface mount | Low | 0%/C | 50 G | 13-in. reel, 10,000 pieces/reel |
| APS12450LLHALT-1SLA | 3-pin SOT23W surface mount | Low | 0%/C | 50 G | 7-in. reel, 3000 pieces/reel |
| APS12450LUAA-1SLA | 3-pin SIP through-hole | Low | 0%/C | 50 G | bulk, 500 pieces/bag |
| APS12450LLHALX-3SLA | 3-pin SOT23W surface mount | Low | 0%/C | 150 G | 13-in. reel, 10,000 pieces/reel |
| APS12450LLHALT-3SLA | 3-pin SOT23W surface mount | Low | 0%/C | 150 G | 7-in. reel, 3000 pieces/reel |
| APS12450LUAA-3SLA | 3-pin SIP through-hole | Low | 0%/C | 150 G | bulk, 500 pieces/bag |
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