Asahi Kasei Microdevices/AKM HG0114

Overview

HG0114 from Asahi Kasei Microdevices is a GaAs-based Hall effect sensor element designed for contactless magnetic field detection in industrial position and current sensing systems. It delivers 78 mV typical output Hall voltage at 50 mT and 6 V supply, with ±0.07 mV offset voltage, 2.0 kΩ input resistance, and operates across –40°C to +125°C ambient temperature.

For engineers reviewing the HG0114 datasheet, HG0114 pinout, HG0114 application, or HG0114 equivalent, key selection considerations include its GaAs material advantages (high sensitivity, low temperature drift), 5-pin SIP package configuration, linearity of ±8%, and thermal coefficients α_VH = –0.07%/°C and α_Rin = 0.3%/°C under defined bias conditions.

Technical Context

The HG0114 is a passive, unamplified Hall element requiring external excitation and signal conditioning. Its output voltage VH is linearly proportional to applied magnetic flux density B and input current I_C, per VH = K·I_C·B, where K = [K(B1) + K(B2)]/2 = 2400 mV/T·mA at B = 0.1/0.5 T.

It features internal shorting between Pin 5 and Pin 3, defining a 4-terminal measurement topology (2× current, 2× voltage) with Pin 1–2 as input and Pin 3–4 as output terminals. Temperature compensation relies on external circuitry due to specified α_VH = –0.07%/°C and α_Rin = 0.3%/°C over –40°C to +125°C.

Key Specifications

Pinout & Package

Package: 5-pin single-in-line (SIP), epoxy-molded, with Pin 5 internally shorted to Pin 3. Dimensions: 3.0 × 1.6 × 1.05 mm (L × W × H), land pattern optimized for through-hole mounting.

Key Features

Applications

Equivalent & Alternatives

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

Compared with A1302 and US5881, the HG0114 offers superior raw sensitivity (2400 mV/T·mA vs. ~5 mV/G for A1302) and minimal offset, but requires external amplification and temperature compensation - making it optimal for high-accuracy, cost-sensitive analog signal chains where design flexibility is prioritized over integration.

Availability

HG0114 is available at Aetrix Electronics and suitable for brushless DC motor commutation, industrial current sensing, automotive throttle position, and linear actuator feedback requiring stable component supply and traceable GaAs Hall element sourcing.

Supply support for HG0114 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, including Hall sensors, audio codecs, and power management devices.

The HG0114 belongs to AKM's GaAs Hall element product line, engineered for high-precision, wide-temperature magnetic field measurement in industrial and automotive subsystems where silicon alternatives exhibit excessive drift or insufficient sensitivity.

FAQ

What is the primary function of the HG0114?

The HG0114 is a passive GaAs Hall effect sensor element that generates a voltage (VH) proportional to applied magnetic flux density and excitation current. Unlike integrated Hall ICs, it requires external biasing and signal conditioning. Its role is strictly transduction - converting magnetic field strength into a measurable analog voltage for downstream processing in the HG0114-based system.

Does the HG0114 include built-in amplification or regulation?

No, the HG0114 contains no active circuitry. It is a bare Hall plate with metallized contacts. All excitation current (I_C), voltage regulation, amplification, and temperature compensation must be implemented externally. This distinguishes the HG0114 from Hall ICs like the A1302 or US5881, which integrate these functions on-die.

Why does Pin 5 connect internally to Pin 3 in the HG0114?

Pin 5 is shorted to Pin 3 inside the HG0114 package to establish a fixed, low-impedance reference node for the differential Hall voltage output (Pins 3–4). This internal short eliminates floating reference issues and improves common-mode rejection in PCB layouts where external grounding asymmetry could otherwise induce measurement error.

What is the significance of the ±8% linearity specification for the HG0114?

The ±8% linearity error means the HG0114's output voltage deviates up to 8% from ideal linear behavior across its full magnetic operating range. This directly impacts absolute position or current accuracy in open-loop systems. For higher precision, users must apply calibration lookup tables or polynomial correction in firmware - a trade-off accepted for the HG0114's superior sensitivity and temperature stability.

Can the HG0114 operate at 150°C junction temperature?

No. The HG0114 is rated for ambient operating temperature up to +125°C (T_opr), with storage up to +150°C. Exceeding +125°C ambient risks irreversible degradation of the GaAs crystal lattice and metallization, leading to increased offset drift and reduced sensitivity. Thermal design must ensure case temperature remains within the HG0114's specified ambient range.