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Asahi Kasei Microdevices/AKM HG166A
- Part No.:
- HG166A
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Category:
- Linear, Compass (ICs)
- Package:
- 4-SMD Module
- Datasheet:
-
HG166A.pdf
- Description:
- SENSOR HALL EFFECT ANALOG 4SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,692
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Product details
Overview
HG166A from Asahi Kasei Microdevices is a GaAs-based linear Hall effect sensor IC designed for contactless magnetic field sensing in current sensing, position detection, and speed measurement circuits. It delivers 78–102 mV output Hall voltage at 50 mT, features 750–1,800 Ω input resistance, ±8 mV offset voltage, −0.06 to +0.3 %/℃ temperature coefficient of VH, and operates across −40°C to +125°C ambient range.
For engineers reviewing the HG166A datasheet, HG166A pinout, HG166A application, or HG166A equivalent, key selection considerations include its GaAs material advantage for high-temperature stability, specified linearity (≤2%), defined thermal drift behavior, and compatibility with 6 V supply and 1 mA excitation current in industrial sensing interfaces.
Technical Context
The HG166A implements a monolithic GaAs Hall element with integrated signal conditioning optimized for analog magnetic field transduction. Its output Hall voltage (VH) scales linearly with applied flux density (B) up to 50 mT and exhibits predictable thermal drift via αVH (−0.06 to +0.3 %/℃) and αRin (−8 to +10 %/℃), enabling compensated designs.
Input resistance (Rin = 750–1,800 Ω) and output resistance (ROUT = 1,000–3,000 Ω) are characterized over −40°C to +125°C, supporting stable biasing in wide-temperature embedded systems. The device requires constant-current or constant-voltage excitation (IC = 1 mA or VC = 6 V) and is not internally amplified - output is raw Hall voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Hall Voltage (VH) | 78–102 mV at B = 50 mT, VC = 6 V - usable analog output for flux-to-voltage conversion |
| Input Resistance (Rin) | 750–1,800 Ω at Ta = 25°C - defines required drive capability for constant-current bias |
| Offset Voltage (VOS) | ±8 mV at B = 0 mT - sets minimum detectable field and zero-field error budget |
| Temp. Coeff. of VH (αVH) | −0.06 to +0.3 %/℃ - enables first-order thermal compensation in precision sensing |
| Linearity (ΔK) | ≤2 % - ensures monotonic response across 0–50 mT operating range |
| Operating Temp. Range | −40°C to +125°C - supports under-hood, motor control, and industrial enclosure use |
| Max Input Voltage (VC) | 12 V - limits external supply rail design for safe operation |
Pinout & Package
Packaged in a 4-pin SIP (Single In-line Package) with lead pitch 2.54 mm, body dimensions 4.0 × 3.0 × 1.5 mm (L×W×H), and GaAs die mounted on copper leadframe for thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Input (+) | Anode for excitation current (IC) or positive supply (VC) terminal |
| 2 | Output (+) | Positive Hall voltage output - referenced to Pin 4 (GND) |
| 3 | Input (−) | Cathode for excitation current or negative supply return |
| 4 | Output (−) / GND | Common reference node for both excitation and Hall output |
Key Features
| Feature | Design Value |
|---|---|
| GaAs Hall element | Superior thermal stability vs. Si-based sensors - αVH ≤ ±0.3 %/℃ enables robust operation up to +125°C |
| Linear output response | VH ∝ B over 0–50 mT with ≤2% linearity error - supports accurate analog field reconstruction |
| Low offset voltage | ±8 mV max at zero field - reduces need for active nulling in low-field applications |
| Wide operating temperature | Rated from −40°C to +125°C - qualified for automotive engine bay and industrial motor feedback |
Applications
| Current Sensing | Rotary Position Detection |
|---|---|
Use Scenario: Isolated DC bus current monitoring in motor drives and power supplies using a flux-concentrating core. IC Role / Device Role / Timing Role: Raw Hall voltage generator providing mV-level proportional output to conductor current. Use Value: Enables galvanic isolation without shunt resistor losses; ±8 mV offset allows sub-5 A resolution with calibration. | Use Scenario: Contactless angular position sensing of rotating shafts with magnetized target wheel. IC Role / Device Role / Timing Role: Analog magnetic field transducer converting pole passage into linear voltage swing. Use Value: Delivers repeatable 78–102 mV amplitude per 50 mT - sufficient SNR for 12-bit ADC digitization without gain stage. |
| Speed Measurement | Proximity Switching |
Use Scenario: Gear tooth counting in automotive crankshaft/camshaft position systems. IC Role / Device Role / Timing Role: Unamplified Hall element generating AC-coupled voltage pulses synchronized to tooth transitions. Use Value: −40°C to +125°C rating ensures reliability in engine compartments; 50 mT sensitivity matches standard ferrite magnets. | Use Scenario: Non-contact end-of-travel detection in industrial actuators and valve position feedback. IC Role / Device Role / Timing Role: Threshold-detectable analog field sensor used with external comparator for digital switching. Use Value: Low 750–1,800 Ω Rin simplifies bias network design; ±8 mV VOS permits tight hysteresis setting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall effect sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HG106A | Same GaAs technology, but lower sensitivity: VH = 39–51 mV at 50 mT; Rin = 375–900 Ω | Reduced output amplitude requires higher-gain signal chain; suitable only where space or cost constraints favor smaller package | Select HG106A only when system gain budget allows halved VH output and thermal drift tolerance is relaxed |
| ALLEGRO A1302 | Si-based ratiometric linear Hall IC with internal amplifier; VHOUT = 1.3–2.7 V, VCC = 4.5–6.0 V | Integrated amplification eliminates external op-amp; incompatible biasing (requires regulated VCC, not IC drive) | Choose A1302 for plug-and-play analog output; avoid if raw Hall voltage interface or GaAs thermal stability is required |
Compared with HG106A and A1302, the HG166A provides higher raw output (78–102 mV), GaAs-specific thermal stability, and direct current-driven operation - making it optimal for calibrated, wide-temperature analog sensing where external signal conditioning is already present.
Availability
HG166A is available at Aetrix Electronics and suitable for current sensing, rotary position detection, speed measurement, and proximity switching applications requiring stable component supply across automotive, industrial motor control, and power electronics programs.
Supply support for HG166A 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 solutions.
The HG166A belongs to AKM's GaAs Hall element product line, engineered specifically for high-temperature-stable, unamplified magnetic field transduction in industrial and automotive sensing systems.
FAQ
What is the maximum operating temperature for the HG166A?
The HG166A is rated for continuous operation from −40°C to +125°C ambient temperature. This specification is validated per AKM's Absolute Maximum Ratings table and confirmed by thermal characterization curves showing stable Rin and VH behavior across this full range. The GaAs material enables this extended range beyond typical silicon Hall elements. Always observe derating above 100°C per allowable power dissipation limits in the datasheet.
Does the HG166A require external amplification?
Yes, the HG166A outputs raw Hall voltage (78–102 mV at 50 mT) and contains no internal amplification or signal conditioning. It must be paired with an external op-amp or ADC driver stage to achieve usable signal levels. This architecture gives designers full control over gain, filtering, and offset correction - critical for high-accuracy current or position sensing systems using the HG166A.
What is the recommended excitation method for the HG166A?
The HG166A supports both constant-current (IC = 1 mA typical) and constant-voltage (VC = 6 V) excitation. Constant-current mode minimizes self-heating effects and improves thermal stability of VH; constant-voltage mode simplifies biasing but introduces additional Rin-dependent variation. Datasheet test conditions specify IC = 1 mA or VC = 6 V - either is valid, but consistency within a design is essential for repeatable HG166A performance.
Is the HG166A RoHS compliant?
Yes, the HG166A meets EU RoHS Directive requirements. AKM confirms RoHS compliance in its environmental documentation and specifies that the device contains no restricted substances above threshold limits. However, due to its GaAs composition, special handling and disposal precautions apply - refer to AKM's "IMPORTANT NOTICE" for GaAs-specific ESD and discard guidance applicable to the HG166A.
What is the pin configuration of the HG166A?
The HG166A uses a 4-pin SIP package with pins arranged linearly: Pin 1 = Input (+), Pin 2 = Output (+), Pin 3 = Input (−), Pin 4 = Output (−)/GND. This configuration supports bidirectional current drive and differential output referencing. Mechanical drawings confirm 2.54 mm pitch and 4.0 × 3.0 × 1.5 mm body dimensions - verified from AKM's dimensional diagram and taping specification (4,000 pcs/reel).
HG166A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Series:
- -
- Package/Case:
- 4-SMD Module
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- Analog Voltage
- Sensing Range:
- -
- Voltage - Supply:
- 12V
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Resolution:
- -
- Bandwidth:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Supplier Device Package:
- 4-SOP
- Mounting Type:
- Surface Mount
HG166A FAQ
1.How can I place an order for HG166A through Aetrix?
Please submit a Request for Quotation (RFQ) for HG166A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for HG166A reliable?
The price and inventory of HG166A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HG166A is usually 5 days.
3.What payment methods are accepted for HG166A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HG166A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HG166A?
HG166A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HG166A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for HG166A?
For technical support, including HG166A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HG166A requirements.
6.How does Aetrix verify that HG166A is sourced from the original manufacturer or authorized distributors?
All HG166A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HG166A meets industry standards.
7.What is the process for return or replacement of HG166A?
All HG166A units undergo pre-shipment inspection (PSI). If there is an issue with HG166A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The HG166A part is unused and in its original packaging.
Return procedure for HG166A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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