APS12800: 2-Wire Hall Effect Latch Family with Advanced Diagnostics

The APS12800 device is a two-wire planar Hall-effect latch 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 controls. 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 APS12800 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 switch device is preferred, please refer to the APS11800. 

APS12800 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.