Diodes Incorporated AH1382-HK4-7

Overview

AH1382-HK4-7 from Diodes Incorporated is a high-sensitivity, ultra-low-power digital unipolar Hall-effect switch IC designed for magnetic position sensing in battery-constrained systems. It operates with 1.6V–5.5V supply, draws only 1.6μA average current at 3V, and switches on with south-pole magnetic fields ≥30G (typical BOPS), making it ideal for smart cover detection in portable electronics and smoke detector status monitoring.

For engineers reviewing the AH1382-HK4-7 datasheet, AH1382-HK4-7 pinout, AH1382-HK4-7 application, or AH1382-HK4-7 equivalent, key selection criteria include its 30G/20G magnetic operate/release points, X2-DFN1410-4 package footprint, 8kV HBM ESD rating, and chopper-stabilized architecture ensuring minimal temperature drift across –40°C to +85°C.

Technical Context

The AH1382-HK4-7 implements a chopper-stabilized Hall sensor with sleep/awake logic that cycles sampling every 45ms (typical period), achieving 1.6μA average supply current. Its latch-and-output driver delivers open-drain output with 0.15V low-level voltage at 1mA sink, enabling direct interface to microcontrollers without external pull-up resistors.

It features unipolar south-pole activation only, with hysteresis of 10G (|BOPS − BRPS|), and maintains stable switching thresholds across supply voltage (1.6V–5.5V) and temperature (–40°C to +85°C) due to offset cancellation and internal calibration.

Key Specifications

Pinout & Package

Package: X2-DFN1410-4 (Type B), 1.4mm × 1.0mm × 0.37mm body, exposed thermal pad (no internal connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL3320EUA-7 and TLE4913HTSA1, the AH1382-HK4-7 uniquely balances ultra-low power (1.6μA), compact X2-DFN1410-4 packaging, and precise 30G/20G magnetic thresholds-making it optimal for battery-powered consumer and industrial sensing where size and energy efficiency are primary constraints.

Availability

AH1382-HK4-7 is available at Aetrix Electronics and suitable for smart cover detection, smoke detector status monitoring, and utility meter tamper sensing requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for AH1382-HK4-7 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 devices, with design centers across Asia, Europe, and the US.

The AH138x series belongs to Diodes' Hall-effect switch product line, engineered specifically for ultra-low-power magnetic sensing in battery-operated consumer, industrial, and IoT endpoints.

FAQ

What magnetic field strength is required to activate the AH1382-HK4-7?

The AH1382-HK4-7 activates when a south-pole magnetic field perpendicular to the package exceeds 30 Gauss (typical operate point, BOPS), with release occurring below 20 Gauss (typical BRPS). Full specification range is 18–38G BOPS and 12–30G BRPS across –40°C to +85°C.

Does the AH1382-HK4-7 require an external pull-up resistor?

No. The AH1382-HK4-7 features an integrated open-drain output capable of sinking 1mA, allowing direct connection to microcontroller GPIO pins without external pull-up resistors. This reduces BOM count and PCB area in space-constrained designs.

Can the AH1382-HK4-7 operate from a 1.8V supply?

Yes. The AH1382-HK4-7 is fully specified from 1.6V to 5.5V, including reliable operation at 1.8V. At this voltage, average supply current remains ≤3μA across temperature, and output low voltage stays ≤0.25V at 1mA load.

Is the exposed thermal pad on the X2-DFN1410-4 package electrically connected?

No. The center exposed pad on the X2-DFN1410-4 package has no internal electrical connection. It may be left unconnected or tied to GND solely for mechanical reinforcement and thermal dissipation-no electrical function is affected either way.