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Home > Products > Sensors, Transducers > Magnetic Sensors > Linear, Compass (ICs)

Diodes Incorporated AH49FNTR-G1

Name: AH49FNTR-G1
Brand: Diodes Incorporated
SKU: AH49FNTR-G1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH49FNTR-G1

Manufacturer:: Diodes Incorporated

Category:: Linear, Compass (ICs)

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: AH49FNTR-G1.pdf

Description:: SENSOR HALL ANALOG SOT23-3

Quantity:: RFQ Add To RFQ list

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Inventory:4,960

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Product details

Overview

AH49FNTR-G1 from Diodes Incorporated is a linear Hall effect sensor IC in SC59 package, delivering proportional analog voltage output (1.7–2.5 mV/G) across ±500 G magnetic range with 2.5 V quiescent output at 5 V supply. It operates from 3–8 V, consumes 3 mA typical, and supports industrial temperature range (−40°C to +105°C). Used in motor control position feedback and rotary encoders where analog field strength sensing is required.

For engineers reviewing the AH49FNTR-G1 datasheet, AH49FNTR-G1 pinout, AH49FNTR-G1 application, or AH49FNTR-G1 equivalent, key selection criteria include output polarity reversal in SC59 vs. TO92S packages, 60 Ω output impedance for direct ADC interfacing, ±0.7% linearity error over span, and compatibility with low-noise signal chains without external filtering.

Technical Context

The AH49FNTR-G1 integrates a Hall plate, low-noise amplifier, and precision resistor network to generate a ratiometric linear voltage output directly proportional to applied magnetic flux density. Its internal architecture eliminates need for external compensation components.

Unlike digital Hall switches, it provides continuous analog output spanning 0.8 V to (V_CC − 0.8 V), with symmetrical response to both north and south magnetic poles - though polarity is reversed in SC59 due to die orientation under lead frame, requiring layout-aware system calibration.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	3 V to 8 V - Supports direct connection to common microcontroller I/O rails or regulated 3.3/5 V supplies without external regulation.
Quiescent Output	2.25–2.75 V at B = 0 G and V_CC = 5 V - Enables single-supply operation with mid-rail bias for bipolar field detection.
Sensitivity	1.7–2.5 mV/G - Delivers ~1.25 V full-scale swing at ±500 G, suitable for 12-bit ADC resolution with >1 LSB/G resolution.
Linearity Error	±0.7% of span - Ensures <±3.5 mV absolute error over full magnetic range, critical for precision position sensing.
Output Impedance	60–120 Ω - Allows direct driving of 10 kΩ+ ADC inputs or op-amp buffers without gain-stage loading effects.
Supply Current	2–4 mA - Enables battery-operated designs with >1-year life on 200 mAh coin cell at 1 Hz sampling.
ESD Rating	HBM 6000 V / MM 600 V - Survives handling and board-level ESD events without protection diodes.

Pinout & Package

SC59 package: 3-pin SOT-23 variant with exposed pad (GND-connected), 1.6 mm × 2.8 mm footprint, 0.95 mm height. Optimized for automated placement and thermal dissipation in compact motor control PCBs.

Pin/Terminal	Circuit Role	Design Meaning
1 (V_CC)	Positive supply input	Accepts 3–8 V DC; decoupling capacitor (0.1 µF) required within 2 mm for noise immunity.
2 (OUT)	Analog voltage output	Low-impedance source (60–120 Ω); connects directly to ADC or instrumentation amplifier input.
3 (GND)	Ground reference	Must tie to system ground plane; exposed pad (underside) is internally connected to GND for thermal and noise performance.

Key Features

Feature	Design Value
Linear voltage output	Direct analog interface to ADCs without signal conditioning - reduces BOM count and layout area.
Low-noise architecture	90 µV RMS noise (10 Hz–10 kHz) eliminates need for external RC filters or op-amp buffering stages.
Temperature-stable resistors	Enables ±0.7% linearity over −40°C to +105°C - avoids recalibration in automotive under-hood or industrial motor environments.
Polarity-aware packaging	SC59's reversed magnetic response vs. TO92S allows mechanical design flexibility - e.g., magnet placement on top vs. bottom side of PCB.
High ESD robustness	6000 V HBM rating permits direct integration into unshielded consumer or industrial assemblies without guard rings or TVS diodes.

Applications

Motor Control Feedback

Rotary Encoder Sensing

Use Scenario: Detecting rotor angular position in BLDC fan motors via embedded ring magnet.

IC Role / Device Role / Timing Role: Linear Hall sensor providing analog commutation signal to MCU's ADC for real-time phase alignment.

Use Value: Enables smooth torque delivery with <±1° electrical angle error across temperature, eliminating hall-effect switch sequencing delays.

Use Scenario: Measuring shaft rotation in HVAC damper actuators using multi-pole magnetic encoder wheel.

IC Role / Device Role / Timing Role: Analog field transducer feeding differential amplifier chain for high-resolution angular interpolation.

Use Value: Achieves 0.5° mechanical resolution with 12-bit ADC sampling at 10 kHz, supporting closed-loop PID control without quadrature decoding logic.

Liquid Level Detection

Ferrous Metal Proximity

Use Scenario: Monitoring fuel tank level via float-mounted magnet moving past fixed AH49FNTR-G1 on PCB.

IC Role / Device Role / Timing Role: Magnetic field strength transducer converting vertical magnet displacement into calibrated voltage output.

Use Value: Provides monotonic 0–5 V output over 0–100% fill range with <±2% full-scale error, enabling single-point calibration in production.

Use Scenario: Detecting presence of steel gears or cam lobes in industrial gearmotor housings.

IC Role / Device Role / Timing Role: Analog proximity detector distinguishing ferrous targets at 1–5 mm air gap without hysteresis-induced chatter.

Use Value: Delivers stable analog threshold crossing with <10 µs response time, supporting high-speed RPM measurement up to 20 kRPM.

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 typ), wider supply range (4.5–6 V), but only ±300 G linear range and no SC59 option.	Requires tighter magnet-to-sensor spacing; limited to low-field applications like current sensing shunts.	Select when higher output swing is needed at lower fields, and TO-92 or SOIC packages are acceptable.
Melexis MLX90242ESE-GAA-000-RE	Programmable gain (1.5–5.0 mV/G), integrated EEPROM calibration, but 5.5 V max V_CC and 3.5 mA ICC.	Supports field-specific offset/gain tuning per unit; suited for factory-calibrated systems with tight accuracy budgets.	Choose when unit-level calibration and field programmability outweigh cost and complexity trade-offs.

Compared with A1302LLHLT-T and MLX90242ESE-GAA-000-RE, AH49FNTR-G1 offers broader magnetic range (±500 G), wider supply tolerance (3–8 V), and SC59 packaging for space-constrained motor control - making it optimal for cost-sensitive, high-volume industrial motion sensing where fixed-gain analog output suffices.

Availability

AH49FNTR-G1 is available at Aetrix Electronics and suitable for motor control feedback, rotary encoder sensing, liquid level detection, and ferrous metal proximity applications requiring stable component supply across industrial temperature ranges and high-volume manufacturing.

Supply support for AH49FNTR-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 ICs for power management, signal integrity, and sensing applications.

The AH49F series belongs to Diodes' linear Hall effect sensor product line, engineered for high-accuracy analog magnetic field measurement in commercial, industrial, and automotive-qualified (AH49FQ) environments.

FAQ

What is the magnetic polarity response of AH49FNTR-G1 in SC59 package?

The SC59 package exhibits reversed magnetic polarity response compared to TO92S variants: when a south pole approaches the marked surface, the output voltage decreases (not increases). This results from die placement beneath the lead frame, flipping field vector direction relative to Hall plate orientation. System firmware must invert interpretation or adjust magnet mounting orientation accordingly.

Can AH49FNTR-G1 operate from a 3.3 V supply?

Yes - AH49FNTR-G1 is fully specified from 3 V to 8 V. At 3.3 V supply, quiescent output is ~1.65 V, output span narrows to ~0.8–2.5 V, and sensitivity drops to ~1.4 mV/G (typical), but linearity and noise performance remain within datasheet limits. No derating or external circuitry is required.

Is the exposed pad on AH49FNTR-G1's SC59 package electrically connected?

No - the SC59 package does not feature an exposed thermal pad. Only U-DFN2020-6 (Type C) and TO92S variants have exposed pads. The SC59 outline shows no thermal pad; its GND connection is solely through Pin 3. PCB land pattern should follow Diodes' recommended SC59 pad layout (X=0.35 mm, Y=0.525 mm, X1=1.65 mm, Y1=1.01 mm).

Does AH49FNTR-G1 require external filtering capacitors?

No - the device integrates low-noise circuitry with 90 µV RMS output noise (10 Hz–10 kHz bandwidth), eliminating need for external RC filters. A 0.1 µF ceramic decoupling capacitor between V_CC and GND, placed within 2 mm of Pin 1, is sufficient for supply stability. Additional filtering degrades signal fidelity and adds unnecessary BOM cost.

AH49FNTR-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:: ±80mT

Voltage - Supply:: 3V ~ 8V

Current - Supply (Max):: 4mA

Current - Output (Max):: -

Resolution:: -

Bandwidth:: -

Operating Temperature:: -40°C ~ 105°C

Grade:: -

Qualification:: -

Features:: -

Supplier Device Package:: SOT-23-3

Mounting Type:: Surface Mount

AH49FNTR-G1 FAQ

1.How can I place an order for AH49FNTR-G1 through Aetrix?

Please submit a Request for Quotation (RFQ) for AH49FNTR-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 AH49FNTR-G1 reliable?

The price and inventory of AH49FNTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH49FNTR-G1 is usually 5 days.

3.What payment methods are accepted for AH49FNTR-G1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH49FNTR-G1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH49FNTR-G1?

AH49FNTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH49FNTR-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 AH49FNTR-G1?

For technical support, including AH49FNTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH49FNTR-G1 requirements.

6.How does Aetrix verify that AH49FNTR-G1 is sourced from the original manufacturer or authorized distributors?

All AH49FNTR-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 AH49FNTR-G1 meets industry standards.

7.What is the process for return or replacement of AH49FNTR-G1?

All AH49FNTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AH49FNTR-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 AH49FNTR-G1 part is unused and in its original packaging.

Return procedure for AH49FNTR-G1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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