Diodes Incorporated AH3280Q-P-A

Overview

AH3280Q-P-A from Diodes Incorporated is an AEC-Q100 qualified, two-wire automotive Hall-effect latch switch IC in SIP-3 package, operating from 2.7V to 27V supply, with BOP = 8–28 G and BRP = −28 to −8 G at +25°C, integrated self-diagnostics, and thermal shutdown for seatbelt buckle and gear position sensing.

For engineers reviewing the AH3280Q-P-A datasheet, AH3280Q-P-A pinout, AH3280Q-P-A application, or AH3280Q-P-A equivalent, this page delivers verified magnetic thresholds, latch behavior, supply current specs (ION = 12–17 mA, IOFF = 2–5 mA), thermal protection release at 180°C, and SIP-3 terminal mapping - all validated per DS41822 Rev. 6-3.

Technical Context

The AH3280Q-P-A implements a chopper-stabilized architecture with dynamic offset cancellation and internal bandgap regulation to ensure ±0.3 μs response delay and ±3.3 μs output jitter across −40°C to +150°C ambient. Its latch functionality requires magnetic polarity reversal (south-to-north transition) to toggle output state.

It features built-in reverse-blocking diode with zener clamp (−32 V reverse supply rating), UVLO activation at 2.2–2.7 V, and safe-mode current of 0.5–1.5 mA during diagnostic fault conditions - enabling robust operation in noisy 12 V/24 V automotive power domains.

Key Specifications

Pinout & Package

SIP-3 (Ammo Pack) package: 3-pin single-inline package with gull-wing leads, 14.5 mm body length, 3.0 mm width, and 1.5 mm height - optimized for automated through-hole insertion and high-vibration mounting.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar two-wire automotive Hall latch applications.

Compared with US1881 and A1220LUA-T, AH3280Q-P-A uniquely combines two-wire operation, integrated reverse protection, latch hysteresis below 10 G, and production-ready AEC-Q100 qualification - making it optimal for cost-sensitive, safety-critical automotive proximity sensing where wiring simplicity and fault resilience are design priorities.

Availability

AH3280Q-P-A is available at Aetrix Electronics and suitable for seatbelt buckle detection, gear position sensing, and wiper park position monitoring requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing.

Supply support for AH3280Q-P-A 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, with IATF 16949 certified manufacturing.

AH3280Q-P-A belongs to the AH32xxQ automotive Hall switch product line, designed specifically for AEC-Q100-compliant, two-wire position sensing in harsh environments - emphasizing latch stability, diagnostic capability, and wide-voltage operation.

FAQ

What is the magnetic polarity requirement for AH3280Q-P-A actuation?

AH3280Q-P-A is a south-pole active latch: output turns ON when south pole flux exceeds BOP (8–28 G), and remains ON until north pole flux drops below BRP (−28 to −8 G). It requires magnetic polarity reversal to toggle states - not just field strength change.

Can AH3280Q-P-A operate directly from a 24 V truck battery?

Yes. AH3280Q-P-A supports 2.7 V to 27 V supply and includes internal zener clamping and reverse-blocking diode, allowing direct connection to 24 V systems without external protection components - validated up to 32 V absolute maximum.

Does AH3280Q-P-A require an external decoupling capacitor?

Yes. A ≥100 nF ceramic capacitor between VDD and GND is mandatory for noise immunity and power stabilization. The datasheet specifies placement "as close to IC as possible" to suppress switching transients and meet EMI requirements in automotive EMC testing.

Is AH3280Q-P-A pin-compatible with other AH32xxQ variants?

Yes - all AH32xxQ devices share identical SIP-3 pinout (VDD–NC–GND) and SC59 footprint. However, magnetic thresholds, output polarity, and off-state current differ: AH3280Q has IOFF = 2–5 mA and direct output, while AH3242Q has IOFF = 5–6.9 mA and same polarity but unipolar behavior.