Automotive-compliant Hall-effect sensors save space

Automotive-compliant Hall-effect sensors save space

New Products |
By Jean-Pierre Joosting

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Diodes Incorporated has introduced a new portfolio of high-sensitivity Hall-effect sensors. Devices in the robust AH39xxQ series provide accurate speed and directional data or two independent outputs.

These Hall-effect sensors are designed for industrial and automotive applications such as detecting rotational and linear speed/direction and determining the angular position of a rotating shaft.

In line with automotive battery requirements, the AH39xxQ series Hall-effect sensors operate over a wide supply voltage range of 2.7- to 27-V. They also have a 40-V absolute maximum rating, enabling them to safely handle 40-V load dumps. Additionally, -18 V of reverse voltage protection guards against incorrect battery connections. For added robustness, the electrostatic discharge (ESD) protection provided by these devices exceed the automotive norms of 5 kV human body model (HBM) and 2 kV charge device model (CDM).

Three BOP/BRP options are offered, with typical values of 10/-10 gauss, 25/-25 gauss, and 75/-75 gauss, while their narrow operating window ensures accurate and reliable switching points. Dual-channel operation means these Hall-effect sensors can replace two latch switches, reducing PCB space and overall component costs. Combining chopper-stabilized amplifiers with an advanced Hall plate design mitigates switch point drift, ensuring accurate measurements over a broad temperature range.

The self-diagnostic features of the AH397xQ make them suitable for ISO 26262-compliant systems. For extra reassurance, these Hall-effectt sensors enter a safe operating mode if an error, such as overtemperature or undervoltage lockout, is detected.

The AH39xxQ series Hall-effect sensors from Diodes are AEC-Q100 Grade 0 qualified, manufactured in IATF 16949 certified facilities, and support PPAP documentation. They are supplied in TSOT25 packages.

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