APS12450: Three-Wire Hall-Effect Latch with Advanced Diagnostics

The APS12450 is a three-wire planar Hall-effect sensor integrated circuit (IC) developed in accordance with ISO 26262 (pending assessment). It includes internal diagnostics and a fault state that support functional safety. The enhanced three-wire interface provides interconnect open/short diagnostics and a fault state to communicate diagnostic information while maintaining compatibility with legacy three-wire systems. The continuous background diagnostics are transparent to the host system and results in a reduced fault tolerant time.

The APS12450 product options include magnetic switchpoints, temperature coefficient, and output polarity. The response can be matched to SmCo, NdFeB, or low-cost ferrite magnets. For situations where a functionally equivalent three-wire switch device is preferred, refer to the APS11450.

APS12450sensors 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 (e.g., 40 V load dump), ESD protection, overtemperature 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.

Package options include industry-standard surface-mount SOT (LH) and through-hole SIP (UA) packages. Both packages are RoHS-compliant and lead (Pb) free with 100% matte-tin-plated leadframes.

• Functional safety
  • Developed in accordance with ISO 26262:2011 (pending assessment)
  • 在tegrated background diagnostics for:
    • Signal path
    • Regulator
    • Hall plate and bias
    • Overtemperature detection
    • Nonvolatile memory
  • Defined fault state
• Multiple product options
  • Magnetic polarity, switchpoints, and hysteresis
  • Temperature coefficient
  • Output polarity
• Reduces module bill-of-materials (BOM) and assembly cost
  • ASIL B sensor can replace redundant sensors
  • 在tegrated 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
  • ±8千伏HBM防静电
  • Overtemperature indication