Hall Effect switches have self-diagnostics capability
The ICs have been designed to offer high sensitivity and high stability over wide operating voltage and temperature ranges.
The ICs are intended to be used in automotive proximity- and position-sensing applications. Using two-wire hall switches cuts the amount of wires that are required in the harness, which provides a saving on system complexity and cost, while also being more resilliant to electrical noise.
The AH324xQ and AH328xQ feature integrated self-diagnostics to continually monitor the main device blocks, supply voltage, and temperature. A third output state is available to warn of any abnormal conditions. The devices are ISO 26262 ASIL-B ready, due to being designed using rigorous design processes and safety analysis being conducted in accordance with the ISO 26262 standard.
While developing the switches, Diodes used an advanced chopper-stabilized design to provide superior stability of the magnetic operating and release points (BOP/BRP) over the 2.7V to 27V operating voltage and -40˚C to +150˚C temperature range. This stability, along with a high ESD rating of 8kV, built-in reverse blocking diode, and supply pin Zener clamp, allows the AH32xxQ series to meet the demanding requirements of automotive proximity/position-sensing applications.
All AH32xxQ devices are manufactured in an SC59 package. They are qualified to AEC-Q100, manufactured in IATF 16949 certified facilities, and support PPAP documentation. The AH324xQ and AH328xQ have a unit price starting at $0.40 in 3000 piece quantities, while the AH323xQ and AH327xQ start at $0.36 in 3000 piece quantities.