Diodes Incorporated AH3232Q-W-7

Overview

AH3232Q-W-7 from Diodes Incorporated is an AEC-Q100 qualified, two-wire automotive Hall-effect unipolar switch IC with direct-output polarity, operating from 2.7V to 27V supply, ±1100 ppm/°C temperature coefficient, and magnetic operate point (BOP) of 40–80 G at +25°C. It functions as a high-sensitivity proximity sensor in seatbelt buckle detection systems, delivering stable on/off current switching via chopper-stabilized architecture and internal bandgap regulation.

For engineers reviewing the AH3232Q-W-7 datasheet, AH3232Q-W-7 pinout, AH3232Q-W-7 application, or AH3232Q-W-7 equivalent, key selection criteria include its unipolar switching behavior, two-wire current-loop interface, thermal shutdown threshold at +190°C, reverse supply protection down to –32V, and suitability for high-vibration, wide-temperature automotive environments (–40°C to +150°C).

Technical Context

The AH3232Q-W-7 implements a chopper-stabilized Hall sensor with dynamic offset cancellation and an integrated bandgap regulator to deliver temperature-compensated operation across –40°C to +150°C ambient. Its two-wire configuration uses VDD and GND pins only-no separate output pin-enabling current-sinking output states (ION = 12–17 mA, IOFF = 5–6.9 mA) directly into the supply rail.

It features undervoltage lockout (UVLO) at 2.2–2.7 V, power-on delay ≤40 μs, magnetic response delay ≤7 μs, and output jitter ±3.3 μs under 1 kHz square-wave excitation. Built-in protections include reverse-polarity blocking diode, zener clamp on VDD, overtemperature shutdown with auto-restart, and ESD robustness (HBM = 8 kV, CDM = 1 kV).

Key Specifications

Pinout & Package

Package: SC59 (Type A1), 3-pin surface-mount package with gull-wing leads; footprint compatible with standard SOT-23 land patterns but with wider lead pitch (0.95 mm) and taller profile (1.45 mm max height).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL3232Q-W-7, AH3232Q-W-7 delivers automotive-grade validation and higher off-state current for stronger signal integrity in noisy harnesses; versus DRV5013A2QLPGM, it eliminates wiring complexity and supports direct battery input-but trades programmable hysteresis for fixed magnetic thresholds.

Availability

AH3232Q-W-7 is available at Aetrix Electronics and suitable for seatbelt buckle detection, transmission gear position sensing, wiper end-stop verification, and window lifter limit monitoring requiring stable component supply across automotive production lifecycles.

Supply support for AH3232Q-W-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets with IATF 16949-certified fabrication and test facilities.

AH3232Q-W-7 belongs to the AH32xxQ automotive Hall-effect switch family, designed specifically for robust, two-wire position sensing in harsh environments where space, wiring simplicity, and AEC-Q100 compliance are mandatory.

FAQ

What is the function of Pin 2 (NC) on the AH3232Q-W-7?

Pin 2 is a no-connect terminal with no internal connection. It may be left floating, tied to VDD, or connected to GND without affecting device operation or performance. This design allows flexibility in PCB layout and avoids unintended short circuits during reflow soldering.

Can AH3232Q-W-7 operate directly from a 24 V truck battery?

Yes-AH3232Q-W-7 supports supply voltages up to 27 V and includes integrated reverse-polarity protection and zener clamping on VDD. It tolerates load-dump transients up to 32 V for ≤500 ms and operates reliably across cold-crank (6.5 V) to alternator-overvoltage (27 V) conditions.

How does the –1100 ppm/°C temperature coefficient affect magnetic switching accuracy?

The –1100 ppm/°C coefficient means BOP decreases by 0.11% per °C rise. For example, at +125°C ambient, BOP drops ~10% from its +25°C value (e.g., 60 G → ~54 G). This is fully characterized and compensated in the chopper architecture to maintain consistent mechanical trip points across temperature.

Is AH3232Q-W-7 suitable for ASIL-B compliant systems?

Yes-AH3232Q-W-7 is AEC-Q100 Grade 0 qualified (–40°C to +150°C), manufactured in IATF 16949 certified facilities, and PPAP capable. While the IC itself is not ISO 26262 certified, its qualification, failure-in-time (FIT) data, and built-in diagnostics (UVLO, thermal shutdown) support ASIL-B system-level implementation.