APS11450 Datasheet | Allegro MicroSystems

FEATURES AND BENEFITS - Functional safety - Developed in accordance with ISO 26262:2011 to meet ASIL B requirements (pending assessment) - Integrated background diagnostics for signal path, regulator, Hall plate and bias, overtemperature detection, and nonvolatile memory - Defined fault state - Multiple product options - Magnetic polarity, switch points, and hysteresis - Temperature coefficient - Output polarity - Reduces module bill-of-materials (BOM) and assembly cost - ASIL B sensor can replace redundant sensors - Integrated overvoltage clamp and reverse-battery diode - Automotive-grade ruggedness and fault tolerance - Extended AEC-Q100 Grade 0 qualification ○ Operation to 175°C junction temperature - 3 to 30 V operating voltage range - ±8 k V HBM ESD - Overtemperature indication PACKAGES 3-pin SOT23-W (LH) 3-pin ultramini SIP (UA) Not to scale DESCRIPTION The APS11450 three-wire planar Hall-effect sensor integrated circuits (ICs) were developed in accordance with ISO 26262:2011 as a hardware safety element out of context with ASIL B capability (pending assessment) for use in automotive safetyrelated systems when integrated and used in the manner prescribed in the applicable safety manual and datasheet. The enhanced three-wire interface provides interconnect open/ short diagnostics and a fault state to municate diagnostic information while maintaining patibility with legacy three-wire systems. The continuous background diagnostics are transparent to the host system and results in a reduced fault tolerant time. The APS11450 product options include magnetic switch points, temperature coefficient, hysteresis, and response to north or south magnetic fields (unipolar switch) or both (bipolar latch or omnipolar switch). The response can be matched to Sm Co, Nd Fe B, or low-cost ferrite magnets. For situations where a functionally equivalent three-wire latch device is preferred, refer to the APS12450. Continued on the next page… TYPICAL APPLICATIONS - Automotive and...