Asahi Kasei Microdevices/AKM HG106A

Overview

HG106A from Asahi Kasei Microdevices (AKM) is a GaAs-based linear Hall effect sensor IC designed for contactless magnetic field sensing in industrial and automotive position/current detection systems. It delivers 75–1,000 mV output Hall voltage (VH) at 50 mT and 5 mA input current, with ±16% linearity error, 750 Ω typical input resistance, and operates across −40°C to +125°C ambient temperature.

For engineers reviewing the HG106A datasheet, HG106A pinout, HG106A application, or HG106A equivalent, this page provides verified electrical characteristics, thermal drift behavior, absolute maximum ratings, package dimensions, and real-world use context for magnetic field measurement circuits requiring stable analog output under varying temperature and flux density conditions.

Technical Context

The HG106A integrates a gallium arsenide (GaAs) Hall element with on-chip signal conditioning optimized for analog magnetic field measurement. Its output Hall voltage (VH) scales linearly with magnetic flux density (B) up to 50 mT and exhibits defined temperature coefficients: αVH = ±0.06%/°C and αRin = ±0.3%/°C over −40°C to +125°C.

It operates with a fixed input current (IC) or constant input voltage (VC) biasing scheme, supporting both 2-wire and 3-wire configurations. The device's offset voltage (VOS = 6.3 mV typ.) and input resistance (Rin = 600 Ω typ.) are characterized at 25°C and tracked across temperature via published Rin-T and VOS-T curves.

Key Specifications

Pinout & Package

HG106A uses a 4-pin SIP (Single In-line Package) with lead pitch 2.54 mm and body dimensions 4.0 × 3.0 × 1.5 mm. Pin 1: Input (+), Pin 2: Output, Pin 3: Input (−), Pin 4: Ground - configured for 2-terminal current excitation and 2-terminal voltage output.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear Hall sensor applications.

Compared with HG106A, A1302 offers superior sensitivity and integration but demands more board area and lacks extended temperature rating; US5881 delivers lower offset and drift yet sacrifices high-temp capability and field range - HG106A remains optimal for cost-sensitive, wide-temp analog field measurement where ±2% linearity is acceptable.

Availability

HG106A is available at Aetrix Electronics and suitable for brushless DC motor control, automotive throttle sensing, and industrial current monitoring requiring stable component supply across extended temperature ranges and consistent analog output performance.

Supply support for HG106A 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

Asahi Kasei Microdevices (AKM) is a Japanese semiconductor company specializing in analog and mixed-signal ICs, particularly magnetic sensors, audio codecs, and power management solutions.

The HG106A belongs to AKM's GaAs Hall sensor product line, engineered for high-temperature-stable analog magnetic field measurement in industrial motion control and automotive subsystems where silicon Hall sensors exhibit excessive drift.

FAQ

What is the maximum magnetic flux density the HG106A can accurately measure?

The HG106A is characterized for linear operation up to 50 mT, with output Hall voltage (VH) specified from 75 mV to 1,000 mV in that range. Beyond 50 mT, linearity degrades beyond the ±2% ΔK limit. For reliable analog sensing, HG106A should be used within 0–50 mT, corresponding to 0–500 G per the note 1 conversion (1 mT = 10 G). The device remains functional but non-linear at higher fields.

Does the HG106A require an external voltage regulator or current source?

Yes - the HG106A requires either a stable current source (e.g., 5 mA) or constant voltage supply (e.g., 6 V) applied across Pins 1 and 3. It has no internal regulation. Typical biasing uses a series resistor from a 6–8 V rail to set IC = 5 mA, leveraging its 750 Ω nominal input resistance. Designers must ensure compliance voltage and thermal dissipation (PD ≤ 150 mW) under worst-case conditions.

How does temperature affect the HG106A's output Hall voltage?

The HG106A exhibits a temperature coefficient of output Hall voltage (αVH) of ±0.06%/°C, meaning VH changes by approximately ±0.06% per °C deviation from 25°C. At 125°C, this results in up to ±6% gain shift relative to 25°C. The published VH-T curve confirms monotonic drift, enabling first-order compensation if needed. This behavior is inherent to the GaAs Hall element and is fully characterized in the HG106A datasheet.

What is the purpose of Pin 4 on the HG106A?

Pin 4 serves as the ground reference for the HG106A's output voltage (VH). Though the device is a 4-pin SIP, Pin 4 is electrically tied to the substrate and provides the return path for output current when driving a load. It must be connected to a low-impedance system ground to prevent noise coupling and ensure accurate VH measurement - especially critical in motor control or high-noise industrial environments where the HG106A is commonly deployed.

Can the HG106A be used in safety-critical automotive applications like airbag deployment?

No - AKM explicitly states that HG106A products are neither intended nor authorized for use as critical components in safety, life support, or hazard-related systems unless approved in writing by AKM's Representative Director. The HG106A lacks ASIL certification, redundant architecture, or fault-detection features required for airbag, brake, or steering control systems. It is qualified for non-safety subsystems such as HVAC actuators, seat position sensing, or throttle monitoring where failure does not directly compromise vehicle safety.