The APS11800 device is a two-wire planar Hall-effect switch integrated circuit family developed in accordance with ISO 26262:2011. It includes internal diagnostics and a safe state that support a functional safety level of ASIL B when integrated and used in conjunction with the appropriate system-level control.
The enhanced 2-wire interface provides interconnect open/short diagnostics and a Safe State to communicate diagnostic information while maintaining compatibility with legacy two-wire systems. The continuous background diagnostics are transparent to the host system and results in a reduced Fault Tolerant Time. The APS11800 product options include magnetic switching mode (N/S/Omni), magnetic switchpoints, temperature coefficient, and output polarity The temperature coefficient response can be matched to SmCo, NdFeB, or low-cost ferrite magnets.
For situations where a functionally equivalent two-wire latching device is preferred, please refer to the APS12800. APS11800 sensors are engineered to operate in the harshest environments with minimal external components. They are qualified beyond the requirements of AEC-Q100 Grade 0 and will survive extended operation at 175°C junction temperature. These monolithic ICs include on-chip reverse-battery protection, overvoltage protection (40 V load dump), ESD protection, over-temperature detection, and an internal voltage regulator for operation directly from an automotive battery bus. These integrated features reduce the end-product Bill-of-Materials (BOM) and assembly cost.
