Diodes Incorporated AH3562Q-SA-7

Overview

AH3562Q-SA-7 from Diodes Incorporated is an AEC-Q100 qualified automotive Hall effect omnipolar switch IC in SOT23 package, operating from 3.0V to 28V supply, with ±20G operate point and ±10G release point, delivering open-drain switching for seatbelt buckle detection, gear position sensing, and door/trunk closure monitoring.

For engineers reviewing the AH3562Q-SA-7 datasheet, AH3562Q-SA-7 pinout, AH3562Q-SA-7 application, or AH3562Q-SA-7 equivalent, this part supports robust magnetic sensing across -40°C to +150°C, features chopper-stabilized offset cancellation, reverse supply protection, and zener clamps on VDD and output-critical for under-hood and chassis-mounted automotive systems.

Technical Context

The AH3562Q employs a chopper-stabilized architecture with dynamic offset cancellation to suppress thermal drift and mechanical stress-induced errors, enabling stable BOP/BRP thresholds over temperature. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, ensuring consistent switching behavior from -40°C to +150°C.

It integrates reverse-blocking diode and zener clamps on both VDD and OUTPUT pins, supporting transient immunity up to ±32V. The single open-drain output delivers 30–55mA current limit and sub-1µs rise/fall times with external 1kΩ pull-up and 20pF load, optimized for direct interface with microcontroller GPIOs or discrete logic.

Key Specifications

Pinout & Package

Package: SOT23 - 3-pin surface-mount package with 2.9mm × 1.3mm footprint, 1.45mm height, and JEDEC-standard lead pitch (0.95mm), optimized for high-density PCB layouts in space-constrained automotive modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Hall effect omnipolar switch applications.

Compared with AL3505QSA-7 and TLE4913-2K, the AH3562Q-SA-7 uniquely combines reverse-blocking diode, dual zener clamps, and ±20G sensitivity in SOT23-enabling drop-in reliability in harsh under-hood locations without added protection components.

Availability

AH3562Q-SA-7 is available at Aetrix Electronics and suitable for automotive seat occupancy detection, transmission gear position feedback, and door/trunk closure monitoring requiring stable component supply across extended temperature and voltage ranges.

Supply support for AH3562Q-SA-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets.

The AH3562Q belongs to Diodes' AEC-Q100 qualified Hall effect sensor product line, engineered specifically for contactless position and proximity sensing in high-vibration, high-temperature automotive subsystems.

FAQ

What is the maximum allowable reverse supply voltage for AH3562Q-SA-7?

The absolute maximum reverse supply voltage is -32V, but the device incorporates an internal reverse-blocking diode that prevents conduction below -18V at room temperature. At -28V and full temperature range, reverse leakage reaches up to 2500µA-designs must ensure power dissipation remains within SIP-3 or SOT23 thermal limits under sustained reverse bias.

Can AH3562Q-SA-7 drive an LED directly without a current-limiting resistor?

No. Although the output can sink up to 55mA, it lacks internal current regulation. Driving an LED directly risks exceeding the 60mA continuous output current rating and violating the 0.4V max V_{OUT_ON} spec at 20mA. A series current-limiting resistor is mandatory to maintain specified electrical performance and reliability.

Does AH3562Q-SA-7 require an external bypass capacitor?

Yes. A 10nF–100nF ceramic capacitor between VDD and GND is required for power stabilization and RF noise immunity, as specified in the Typical Applications Circuit. Omitting C_IN increases susceptibility to supply transients and may cause erratic switching behavior, especially in electrically noisy automotive environments.

How does the chopper-stabilized architecture improve performance over conventional Hall switches?

The chopper-stabilized design actively cancels offset voltage drift caused by temperature gradients and mechanical stress, reducing BOP/BRP variation to <±0.5G/°C. This enables stable operation without recalibration across -40°C to +150°C-critical for gear position and HVAC actuator applications where thermal cycling exceeds 100°C.