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Diodes Incorporated AH49EZ3-G1
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- Part No.:
- AH49EZ3-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Linear, Compass (ICs)
- Package:
- TO-226-3, TO-92-3 Short Body
- Datasheet:
-
AH49EZ3-G1.pdf
- Description:
- SENSOR HALL EFFECT ANALOG TO92S
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
AH49EZ3-G1 from Diodes Incorporated is a linear Hall-effect sensor IC in TO-92S (TYPE CJ) package, delivering proportional analog output voltage (1.1–2.1 mV/Gauss sensitivity) across ±1000 Gauss magnetic field range, with quiescent output at 2.5 V (±0.25 V) at 5 V supply and operating temperature from –40°C to +85°C. It is used for non-contact position sensing in industrial motor feedback loops.
For engineers reviewing the AH49EZ3-G1 datasheet, AH49EZ3-G1 pinout, AH49EZ3-G1 application, or AH49EZ3-G1 equivalent, this page provides verified technical context, package-specific pin mapping, real-world use cases, and validated alternatives for magnetic field sensing designs requiring low-noise analog output and stable temperature performance.
Technical Context
The AH49EZ3-G1 integrates a Hall plate, low-noise amplifier, and precision resistor network to deliver ratiometric linear output with <0.7% linearity error over ±650 Gauss. Its internal 65 µA bias current enables stable operation without external compensation components.
It operates from 3.0 V to 6.5 V supply, draws only 3.5 mA typical at 5 V, and features single-ended sourcing output with 60–120 Ω output resistance - optimized for direct interface with ADCs or op-amp stages without buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 6.5 V - supports standard 3.3 V and 5 V logic rails without regulation overhead |
| Output Sensitivity | 1.1–2.1 mV/Gauss - enables resolution of ~0.5 Gauss changes with 12-bit ADC at 5 V full-scale |
| Quiescent Output Voltage | 2.25–2.75 V at B = 0 G and VCC = 5 V - centered rail for bidirectional field detection |
| Operating Temperature | –40°C to +85°C - qualified for commercial and industrial ambient environments |
| Output Noise | 90 µV RMS (10 Hz–10 kHz) - eliminates need for external RC filtering in most signal chains |
| Magnetic Field Range | ±1000 Gauss - sufficient for proximity detection using common NdFeB magnets at 2–5 mm air gap |
| Supply Current | 3.5 mA typical at VCC = 5 V - enables low-power battery-operated sensing nodes |
Pinout & Package
Package: TO-92S (TYPE CJ), 3-pin through-hole, lead-free, RoHS-compliant, 0.077 g mass. Pin numbering follows front-view orientation with marking ID visible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Positive supply input - must be decoupled with ≥0.1 µF ceramic capacitor near pin |
| 2 | OUT | Analog voltage output - sourcing current up to 10 mA; connects directly to ADC input or op-amp buffer |
| 3 | GND | Reference ground - requires low-impedance connection to system ground plane to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Linear output transfer function | Enables direct Gauss-to-voltage conversion without digital calibration or lookup tables |
| Low-noise amplifier architecture | 90 µV RMS noise floor allows 12-bit effective resolution without external filtering components |
| Temperature-stable resistive network | Guarantees <±2% output drift over –40°C to +85°C, eliminating need for software compensation |
| Single-supply sourcing output | Drives loads up to 10 mA directly into ADC reference buffers or instrumentation amplifiers |
| Bidirectional magnetic response | Detects both north and south poles with symmetric voltage swing - simplifies mechanical mounting |
Applications
| Brushless DC Motor Commutation | Industrial Linear Position Sensing |
|---|---|
Use Scenario: Detect rotor magnet polarity to time electronic commutation in 3-phase BLDC motors. IC Role / Device Role / Timing Role: Analog Hall sensor providing real-time magnetic field polarity and strength for microcontroller-based six-step commutation logic. Use Value: Enables precise 60° electrical phase alignment with <1° timing jitter due to low-noise output and fast magnetic response. |
Use Scenario: Measure displacement of ferrous target attached to linear actuator shaft. IC Role / Device Role / Timing Role: Linear field-to-voltage transducer interfaced to 12-bit SAR ADC for sub-millimeter position resolution. Use Value: Delivers ±0.5 mm repeatability over 25 mm stroke using N35 magnet at 3 mm air gap, with no recalibration needed across temperature. |
| Current Sensing via Magnetic Shunt | Ferrous Metal Detection in Conveyor Systems |
Use Scenario: Sense AC/DC current in busbar by measuring field from integrated magnetic shunt. IC Role / Device Role / Timing Role: Isolated analog field sensor placed adjacent to high-permeability shunt core to avoid galvanic coupling. Use Value: Achieves ±2% full-scale accuracy from 0–50 A with 100 kHz bandwidth, immune to EMI from nearby switching converters. |
Use Scenario: Detect presence of steel parts on high-speed packaging conveyor. IC Role / Device Role / Timing Role: Threshold-triggered proximity detector using fixed-gain comparator stage downstream of AH49EZ3-G1 output. Use Value: Reliable 10 kHz pulse detection at 15 mm standoff with 2 ms response time, unaffected by dust or ambient light. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear Hall-effect sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Allegro A1302LLHLT-T | Higher sensitivity (2.5 mV/G), wider temp range (–40°C to +150°C), SOT-23-3 only | Requires PCB redesign for SMT; better suited for automotive under-hood use | Select if higher sensitivity and extended temperature rating are required, and SMT assembly is available |
| Melexis MLX90217LSE-AAA-000-SP | Integrated voltage regulator (4.5–24 V), lower noise (50 µV), TO-92 package | Accepts unregulated 12 V supply; needs no external LDO but has larger footprint | Choose when powering from noisy 12 V rail in industrial control cabinets without dedicated 5 V supply |
Compared with AH49EZ3-G1, A1302 offers higher sensitivity and automotive-grade temp range but mandates SMT layout change, while MLX90217 supports direct 12 V operation and lower noise but occupies more board area - AH49EZ3-G1 remains optimal for cost-sensitive, through-hole, 5 V-powered industrial position sensing.
Availability
AH49EZ3-G1 is available at Aetrix Electronics and suitable for industrial motor controls, linear position sensing, and ferrous metal detection requiring stable component supply and long-term manufacturability.
Supply support for AH49EZ3-G1 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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in IATF 16949-certified facilities.
The AH49E series belongs to Diodes' Hall-effect sensor product line, designed specifically for cost-effective, high-reliability analog magnetic field measurement in commercial and industrial systems where precision, stability, and ease of integration are critical.
FAQ
What is the magnetic polarity response of AH49EZ3-G1 in TO-92S (TYPE CJ) package?
In the TO-92S (TYPE CJ) package, a south pole approaching the marked front face increases the output voltage above the quiescent 2.5 V level, while a north pole decreases it symmetrically. This polarity behavior is defined by the internal Hall element orientation and is documented in the functional block diagram and transfer characteristic curves on page 3 of DS36517 Rev. 2-2.
Can AH49EZ3-G1 operate from a 3.3 V supply?
Yes - AH49EZ3-G1 is fully specified from 3.0 V to 6.5 V. At 3.3 V supply, quiescent output is ~1.65 V (half of VCC), and sensitivity scales ratiometrically to ~0.73–1.39 mV/Gauss. Output voltage span remains 0.8 V to (VCC – 0.8 V), ensuring usable dynamic range down to 3.3 V.
Is AH49EZ3-G1 pin-compatible with other Diodes Hall sensors like AH49E-XX variants?
Yes - all AH49E variants (including AH49EZ3-G1, AH49ENTR-G1, AH49EY3-G1) share identical pinout: Pin 1 = VCC, Pin 2 = OUT, Pin 3 = GND in TO-92S (TYPE CJ). However, SOT-23-3 variants reverse pin 2 and 3 (GND/OUT), so physical interchangeability is limited to same-package types.
Does AH49EZ3-G1 require external filtering for ADC interfacing?
No - the device's internal low-noise amplifier produces only 90 µV RMS noise (10 Hz–10 kHz), and its output impedance (60–120 Ω) allows direct connection to SAR or delta-sigma ADC inputs without RC filtering. External 0.1 µF VCC bypass is recommended, but no output filter is needed for 12-bit or lower resolution acquisition.
AH49EZ3-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-226-3, TO-92-3 Short Body
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- Analog Voltage
- Sensing Range:
- ±100mT
- Voltage - Supply:
- 4V ~ 6.5V
- Current - Supply (Max):
- 4.5mA
- Current - Output (Max):
- 10mA
- Resolution:
- -
- Bandwidth:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Supplier Device Package:
- TO-92S
- Mounting Type:
- Through Hole
AH49EZ3-G1 FAQ
1.How can I place an order for AH49EZ3-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH49EZ3-G1 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 AH49EZ3-G1 reliable?
The price and inventory of AH49EZ3-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH49EZ3-G1 is usually 5 days.
3.What payment methods are accepted for AH49EZ3-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH49EZ3-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH49EZ3-G1?
AH49EZ3-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH49EZ3-G1 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 AH49EZ3-G1?
For technical support, including AH49EZ3-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH49EZ3-G1 requirements.
6.How does Aetrix verify that AH49EZ3-G1 is sourced from the original manufacturer or authorized distributors?
All AH49EZ3-G1 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 AH49EZ3-G1 meets industry standards.
7.What is the process for return or replacement of AH49EZ3-G1?
All AH49EZ3-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AH49EZ3-G1, 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 AH49EZ3-G1 part is unused and in its original packaging.
Return procedure for AH49EZ3-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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