Diodes Incorporated AH3282Q-P-B

Overview

AH3282Q-P-B from Diodes Incorporated is an AEC-Q100 qualified, two-wire automotive Hall-effect latch switch IC in SIP-3 package, designed for position and proximity sensing in harsh environments. It operates from 2.7V to 27V, features ±45 G operating point (BOP) and ±15 G release point (BRP) at +25°C, integrated self-diagnostics, and thermal shutdown with auto-restart - deployed in gear position detection and door/trunk closure systems.

For engineers reviewing the AH3282Q-P-B datasheet, AH3282Q-P-B pinout, AH3282Q-P-B application, or AH3282Q-P-B equivalent, key selection criteria include latch-mode magnetic response, 3.3 mA off-state current (IOFF(2)), -40°C to +150°C ambient operation, ISO 26262 readiness, and SIP-3 mechanical compatibility with high-vibration automotive mounting.

Technical Context

The AH3282Q-P-B implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated supply, delivering stable switching thresholds across temperature. Its latch behavior requires magnetic polarity reversal (south-to-north transition) to reset output state, enabling reliable position-hold detection without continuous field presence.

Integrated protection includes reverse-supply blocking diode with zener clamp (±32 V absolute max), UVLO at 2.2–2.7 V, HBM ESD rating of 8 kV, and thermal shutdown at 190°C junction temperature with 180°C release hysteresis - all supporting robust operation in 12/24 V automotive electrical systems.

Key Specifications

Pinout & Package

SIP-3 (Bulk Pack) package: 3-pin single-inline package with straight leads, 14.5 mm body length, 3.0 mm width, and 1.5 mm height - optimized for automated through-hole insertion and high-reliability solder joints in automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL3282TQ and TLE4961-3U, AH3282Q-P-B uniquely combines SIP-3 mechanical robustness, 3.3 mA ultra-low off-state current, and integrated diagnostics - making it optimal for ASIL-B-compliant door, gear, and seatbelt sensing where reliability and fault reporting are mandatory.

Availability

AH3282Q-P-B is available at Aetrix Electronics and suitable for automotive position sensing, seatbelt monitoring, and gear position detection requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AH3282Q-P-B 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 devices for automotive, industrial, and computing markets - with IATF 16949-certified manufacturing and AEC-Q100 product validation.

The AH32xxQ series targets automotive proximity and position sensing, emphasizing latch/unipolar flexibility, wide supply range, and built-in diagnostics to simplify compliance with ISO 26262 functional safety requirements.

FAQ

What is the magnetic polarity sensitivity of AH3282Q-P-B?

The AH3282Q-P-B is a south-pole-activated latch switch: output turns ON when south-pole flux exceeds +15 G (BOP), and remains ON until north-pole flux falls below -15 G (BRP). Its functional block diagram confirms direct-output polarity with no inversion - verified in DS41822 Rev. 6, page 5 magnetic characteristics table.

Can AH3282Q-P-B operate with a 3.3 V microcontroller supply rail?

No - AH3282Q-P-B requires minimum 2.7 V supply but is designed for automotive 12 V/24 V systems; its 17 mA on-state current and internal regulator necessitate ≥5 V for stable operation. At 3.3 V, UVLO activates (threshold 2.2–2.7 V), disabling output - confirmed in Recommended Operating Conditions table, page 4.

Does AH3282Q-P-B require an external decoupling capacitor?

Yes - a ≥100 nF ceramic capacitor between VDD and GND is mandatory per datasheet Note 4 (page 2). It stabilizes internal regulation, suppresses supply noise from ignition transients, and ensures 7 μs response time; placement must be adjacent to pins 1 and 3 to minimize inductance.

Is AH3282Q-P-B pin-compatible with AH3281Q-P-B?

Yes - both share identical SIP-3 package, pinout (VDD-NC-GND), and latch functionality. Key differences are BOP/BRP thresholds (AH3281Q: ±8–±28 G; AH3282Q: ±15–±45 G) and off-state current (AH3281Q: 6 mA typ; AH3282Q: 3.3 mA typ) - documented in Magnetic Characteristics table, page 5.