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Diodes Incorporated AH49ENTR-G1
- Part No.:
- AH49ENTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- Linear, Compass (ICs)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH49ENTR-G1.pdf
- Description:
- SENSOR HALL ANALOG SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,255
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Product details
Overview
AH49ENTR-G1 from Diodes Incorporated is a linear Hall-effect sensor IC in SOT-23-3 package, designed for analog magnetic field sensing with proportional voltage output. It delivers 1.6 mV/G typical sensitivity, 2.5 V quiescent output at zero Gauss, ±1000 G magnetic range, and operates from 3.0–6.5 V supply across –40°C to +85°C - used in motor control position feedback and current sensing circuits.
For engineers reviewing the AH49ENTR-G1 datasheet, AH49ENTR-G1 pinout, AH49ENTR-G1 application, or AH49ENTR-G1 equivalent, key selection criteria include output linearity (0.7% span), low 90 µV noise (10 Hz–10 kHz), 3.5 mA supply current at 5 V, and polarity-sensitive magnetic response requiring correct orientation of north/south poles relative to the marked face.
Technical Context
The AH49ENTR-G1 integrates a Hall plate, low-noise amplifier, and precision resistor network to deliver temperature-stable linear output without external filtering. Its single-ended sourcing output drives loads up to 10 mA with 60–120 Ω output impedance.
Magnetic polarity response is inverted between TO-92S and SOT-23-3 packages: for SOT-23-3 (AH49ENTR-G1), a south pole approaching the marked face lowers output voltage, opposite to TO-92S. Sensitivity peaks at 6 V supply but sacrifices symmetry and increases ICC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.0–6.5 V - Enables direct interface with 3.3 V or 5 V microcontroller ADCs without level-shifting. |
| Quiescent Output Voltage | 2.25–2.75 V at B = 0 G and VCC = 5 V - Centered rail for symmetric ±1000 G detection range. |
| Sensitivity | 1.1–2.1 mV/G (typ. 1.6) - Delivers ~3.2 V full-scale swing over ±1000 G, compatible with 12-bit ADC resolution. |
| Output Noise | 90 µV RMS (10 Hz–10 kHz) - Eliminates need for external RC filtering in most industrial sensing applications. |
| Operating Temperature | –40°C to +85°C - Validated for commercial and industrial environments, excluding automotive AEC-Q100 qualification. |
| Supply Current | 3.5 mA typ. at VCC = 5 V - Supports battery-powered designs with multi-year operation at low duty cycle. |
| Magnetic Range | ±1000 Gauss - Sufficient for proximity detection of ferrous targets up to ~10 mm distance with N35 magnets. |
Pinout & Package
AH49ENTR-G1 uses the SOT-23-3 package (green, halogen/antimony-free), with 1.0 mm pitch, 2.9 mm × 1.3 mm footprint, and moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode-marked corner) | VCC | Positive supply input - Must be decoupled with ≥0.1 µF ceramic capacitor near pin for noise immunity. |
| 2 (Center) | GND | Ground reference - Shared return path for supply and output; requires low-impedance PCB connection. |
| 3 (Opposite VCC) | OUT | Analog voltage output - Sourcing only; connects directly to ADC input or op-amp buffer without pull-up. |
Key Features
| Feature | Design Value |
|---|---|
| Linear output transfer function | Proportional VOUT = VCC/2 + (Sensitivity × B) - Enables direct Gauss-to-voltage calibration without digital compensation. |
| Low-noise amplifier architecture | 90 µV RMS noise floor - Permits use with 10–12 bit SAR ADCs without oversampling or external filtering. |
| Integrated precision resistors | ±0.7% linearity error over full magnetic range - Reduces system-level calibration burden in production test. |
| Reversed magnetic polarity vs. TO-92S | South pole on marked face lowers output - Requires mechanical orientation verification during PCB layout and assembly. |
| Lead-free, halogen-free construction | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - Complies with RoHS 3 and JEDEC green standards for global environmental compliance. |
Applications
| Current Sensing | Motor Control |
|---|---|
|
Use Scenario: Non-invasive DC current measurement in power supplies and battery management systems using a conductor loop around the Hall sensor. IC Role / Device Role / Timing Role: Linear magnetic field transducer converting ampere-turns into proportional analog voltage. Use Value: Enables isolation without shunt resistor losses; supports ±50 A range with 1.6 mV/G sensitivity and 2.5 V offset for bidirectional reading. |
Use Scenario: Commutation angle detection in BLDC motors via embedded permanent magnets on rotor shaft. IC Role / Device Role / Timing Role: Analog position feedback element feeding into MCU ADC for real-time rotor angular estimation. Use Value: Provides continuous 0–360° position data with <1° electrical resolution at 5 V supply and 12-bit sampling. |
| Position Sensing | Liquid Level Sensing |
|
Use Scenario: Linear displacement measurement using a moving magnet attached to actuator rod in HVAC dampers or valve controls. IC Role / Device Role / Timing Role: Analog linear transducer mapping physical travel distance to output voltage. Use Value: Delivers 0.5–4.5 V output over 0–20 mm stroke with <2% full-scale nonlinearity, eliminating need for lookup tables. |
Use Scenario: Float-based tank level monitoring where magnet moves vertically with liquid surface in plastic fuel or coolant reservoirs. IC Role / Device Role / Timing Role: Magnetic proximity detector translating float height into calibrated analog voltage signal. Use Value: Supports 0–100% level reporting with ±2% accuracy over temperature, using only passive float/magnet assembly and no moving contacts. |
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), but higher ICC (7 mA at 5 V) | Validated for under-hood automotive use; not RoHS 3 green-compliant | Select when extended temperature or higher signal amplitude is required; avoid if power budget <4 mA is critical. |
| MELEXIS MLX90242ELD-AAA-000-SP | Digital I²C output, factory-programmable offset/gain, 16-bit resolution, but requires MCU firmware integration | Enables multi-sensor daisy-chaining and self-calibration; no analog signal chain design needed | Select when system already uses I²C infrastructure and digital calibration flexibility outweighs analog simplicity. |
Compared with AH49ENTR-G1, A1302 offers higher thermal robustness at cost of power efficiency, while MLX90242 replaces analog linearity with programmable digital precision - making AH49ENTR-G1 optimal for cost-sensitive, low-power, fixed-gain analog interfaces.
Availability
AH49ENTR-G1 is available at Aetrix Electronics and suitable for motor control, current sensing, position sensing, and liquid level sensing applications requiring stable component supply, RoHS 3 compliance, and SOT-23-3 footprint compatibility.
Supply support for AH49ENTR-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q200.
AH49ENTR-G1 belongs to Diodes' linear Hall-effect sensor product line, engineered for high-accuracy analog magnetic field measurement in cost-sensitive industrial and consumer systems - prioritizing low noise, temperature stability, and ease of integration over programmability.
FAQ
What is the magnetic polarity response of AH49ENTR-G1?
The AH49ENTR-G1 (SOT-23-3) exhibits reversed magnetic polarity versus TO-92S variants: when a south pole approaches the marked face (GJ1 side), the output voltage decreases from its 2.5 V quiescent level. A north pole increases it. This inversion is confirmed in the datasheet's Transfer Characteristics section and must be verified during mechanical mounting.
Can AH49ENTR-G1 operate from a 3.3 V supply?
Yes - AH49ENTR-G1 is fully specified from 3.0 V to 6.5 V. At 3.3 V, quiescent output is ~1.65 V, sensitivity reduces to ~1.06 mV/G (scaling linearly with VCC), and full-scale output spans ~0.65–2.65 V over ±1000 G. No derating or performance loss occurs within this range.
Does AH49ENTR-G1 require external filtering?
No - the integrated low-noise amplifier produces only 90 µV RMS noise (10 Hz–10 kHz), eliminating the need for external RC filters in most applications. Only in high-EMI environments (e.g., near inverters) is a 10 nF ceramic capacitor from OUT to GND recommended for additional HF suppression.
Is AH49ENTR-G1 qualified for automotive applications?
No - AH49ENTR-G1 is rated for –40°C to +85°C and is not AEC-Q100 qualified. Diodes offers automotive-grade alternatives (e.g., AH49E variants with PPAP support and IATF 16949 manufacturing), but AH49ENTR-G1 is intended for commercial and industrial use only.
AH49ENTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- Analog Voltage
- Sensing Range:
- ±100mT
- Voltage - Supply:
- 3V ~ 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:
- SOT-23-3
- Mounting Type:
- Surface Mount
AH49ENTR-G1 FAQ
1.How can I place an order for AH49ENTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH49ENTR-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 AH49ENTR-G1 reliable?
The price and inventory of AH49ENTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH49ENTR-G1 is usually 5 days.
3.What payment methods are accepted for AH49ENTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH49ENTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH49ENTR-G1?
AH49ENTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH49ENTR-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 AH49ENTR-G1?
For technical support, including AH49ENTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH49ENTR-G1 requirements.
6.How does Aetrix verify that AH49ENTR-G1 is sourced from the original manufacturer or authorized distributors?
All AH49ENTR-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 AH49ENTR-G1 meets industry standards.
7.What is the process for return or replacement of AH49ENTR-G1?
All AH49ENTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AH49ENTR-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 AH49ENTR-G1 part is unused and in its original packaging.
Return procedure for AH49ENTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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