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Allegro MicroSystems A1301ELHLT-T
- Part No.:
- A1301ELHLT-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- SOT-23W
- Datasheet:
-
A1301ELHLT-T.pdf
- Description:
- SENSOR HALL EFFECT ANALOG SOT23W
- Quantity:
- Payment:
- Shipping:
Inventory:1,860
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Product details
Overview
A1301ELHLT-T from Allegro MicroSystems is a continuous-time, ratiometric, linear Hall-effect sensor IC optimized for precise voltage output proportional to applied magnetic field. It delivers 2.5 mV/G typical sensitivity, 50% VCC quiescent output, operates from 4.5–6.0 V, and supports –40°C to 85°C ambient range in SOT23W (LH) package-used in industrial position sensing for linear and rotational motion.
For engineers reviewing the A1301ELHLT-T datasheet, A1301ELHLT-T pinout, A1301ELHLT-T application, or A1301ELHLT-T equivalent, this page provides verified technical context, key specifications, package details, real-world use cases, and validated alternative options for robust magnetic sensing design.
Technical Context
The A1301ELHLT-T integrates a Hall element, linear amplifier, and CMOS Class A output stage on a single die, enabling low-noise, rail-to-rail ratiometric output directly proportional to both supply voltage and magnetic flux density. Its end-of-line gain and offset trimming ensures tight quiescent output voltage error (±3.0%) and magnetic sensitivity error (±3.0%) over temperature and supply variation.
It features 20 kHz bandwidth, 3 μs typical power-on time, and 150 μVrms wideband output noise with external ≤10 kHz low-pass filtering. The device maintains ±2.5% linearity and ±3.0% symmetry at 25°C, with quiescent output voltage stable between 2.2 V and 2.8 V across its full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity | 2.5 mV/G typical - enables precise analog field measurement with 0.4 G resolution at 1 V output swing |
| Quiescent Output | 50% of VCC - simplifies signal conditioning by centering output at mid-supply regardless of rail variation |
| Supply Range | 4.5–6.0 V - compatible with standard 5 V industrial logic rails and tolerant of ±10% regulation drift |
| Operating Temp | –40°C to +85°C - qualified for commercial/industrial environments without derating |
| Output Bandwidth | 20 kHz - supports real-time motion tracking up to ~3,200 RPM for rotational sensing |
| Power-On Time | 3 μs typical - allows rapid system wake-up and high-frequency sampling in duty-cycled applications |
| Noise (RMS) | 150 μV - limits minimum detectable field change to ~0.06 G with 10 kHz filtering |
Pinout & Package
Package: SOT23W (LH), surface-mount, 3-pin, Pb-free with 100% matte tin plating. Dimensions per Allegro DWG-802840: 2.98 × 1.91 × 1.00 mm, branded face orientation defined.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Accepts 4.5–6.0 V; powers internal Hall element, amplifier, and output stage |
| VOUT (Pin 2) | Analog output terminal | Provides ratiometric, rail-to-rail voltage proportional to B-field; drives ≥10 kΩ loads |
| GND (Pin 3) | Reference ground | Return path for supply and output; must be low-impedance to minimize noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Ratiometric output | Both quiescent voltage and sensitivity scale linearly with VCC-eliminates need for precision voltage reference in supply-varying systems |
| Factory-trimmed accuracy | End-of-line gain/offset calibration achieves ±3.0% VOUTQ and Sens error-reduces system-level calibration overhead |
| Low-noise analog output | 150 μVrms noise floor enables sub-gauss resolution in motion feedback loops with minimal external filtering |
| Fast power-on response | 3 μs wake-up time supports microsecond-scale sampling windows in battery-powered or event-triggered sensing |
| Robust ESD performance | Qualified to >4 kV HBM-ensures reliability during PCB handling and in electrically noisy industrial enclosures |
Applications
| Linear Position Sensing | Rotary Encoder Interface |
|---|---|
Use Scenario: Detecting piston displacement in hydraulic cylinders using a magnet affixed to moving rod. IC Role / Device Role / Timing Role: Analog magnetic field transducer converting axial B-field strength into proportional voltage for ADC digitization. Use Value: 2.5 mV/G sensitivity and ±2.5% linearity enable ±0.5 mm position resolution over 50 mm stroke with 12-bit ADC. | Use Scenario: Monitoring motor shaft rotation via ring magnet mounted on rotor surface. IC Role / Device Role / Timing Role: Continuous-time analog angle sensor feeding sinusoidal/cosine signals to interpolation circuitry. Use Value: 20 kHz bandwidth and 3 μs power-on support 10,000 RPM operation with <1° electrical angle error. |
| Current Sensing (Indirect) | Proximity Switching |
Use Scenario: Measuring DC bus current in motor drives by detecting field around a current-carrying conductor. IC Role / Device Role / Timing Role: Open-loop field-to-voltage converter placed adjacent to conductor; output scaled to amperes. Use Value: Ratiometric behavior maintains accuracy across 4.5–6.0 V supply variation common in unregulated DC link monitoring. | Use Scenario: Detecting presence/absence of ferrous gear teeth in automotive transmission sensors. IC Role / Device Role / Timing Role: Threshold-based proximity detector using quiescent output as zero-field reference. Use Value: 50% VCC quiescent point and ±3.0% symmetry allow reliable zero-crossing detection without external biasing. |
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 A1324LLHLT-T | Higher sensitivity (5.0 mV/G), same LH package, wider temp range (–40°C to 150°C), but higher quiescent current (13 mA vs. 11 mA max) | Better suited for low-field detection; requires thermal margin for 150°C operation | Select when enhanced resolution below 100 G is critical and higher power budget is acceptable |
| MELEXIS MLX90242ESE-GAA-100-SP | Programmable sensitivity (1.0–10.0 mV/G), integrated EEPROM, same SOT23-3 package, but requires I²C configuration | Enables field calibration and multi-point correction; adds firmware dependency | Select when system-level calibration flexibility or post-production tuning is required |
Compared with A1301ELHLT-T, the A1324LLHLT-T offers doubled sensitivity and extended temperature capability at modest current cost, while the MLX90242 introduces programmability and digital configurability-making it suitable for adaptive sensing systems where fixed analog response is insufficient.
Availability
A13301ELHLT-T is available at Aetrix Electronics and suitable for industrial position sensing, motor control feedback, and automotive subsystem monitoring requiring stable component supply and long-term production continuity.
Supply support for A1301ELHLT-T 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
Allegro MicroSystems is a U.S.-based semiconductor company specializing in high-performance magnetic sensing and power ICs for industrial, automotive, and consumer markets.
The A1301 family belongs to Allegro's continuous-time linear Hall-effect sensor product line, designed specifically for accurate, low-drift analog position and motion sensing in harsh environments.
FAQ
What is the operating supply voltage range for the A1301ELHLT-T?
The A1301ELHLT-T operates from 4.5 V to 6.0 V. This range ensures compatibility with standard 5 V industrial power rails while accommodating typical regulator tolerances. Operation outside this range may cause functional failure or permanent damage, as the absolute maximum supply voltage is 8 V and reverse supply voltage is limited to –0.1 V.
How does the ratiometric output of the A1301ELHLT-T improve system accuracy?
The A1301ELHLT-T's ratiometric output means both its quiescent voltage and magnetic sensitivity scale linearly with supply voltage. This eliminates errors caused by VCC drift-e.g., a 5% drop in VCC causes proportional 5% reduction in both VOUTQ and sensitivity, preserving measurement ratio. As a result, A1301ELHLT-T maintains consistent field-to-voltage conversion without requiring a precision voltage reference.
What is the pin configuration and package type of the A1301ELHLT-T?
The A1301ELHLT-T uses the LH package: a 3-pin SOT23W surface-mount outline. Pin 1 is VCC, Pin 2 is VOUT, and Pin 3 is GND. The package measures 2.98 mm × 1.91 mm × 1.00 mm, features 100% matte tin plating, and complies with Pb-free requirements. Pinout matches Allegro's standardized LH footprint per datasheet drawing 802840.
Can the A1301ELHLT-T be used for rotary position sensing?
Yes, the A1301ELHLT-T is explicitly qualified for rotary position sensing. Its continuous-time architecture, 20 kHz bandwidth, and fast 3 μs power-on time support high-speed angular measurement-e.g., monitoring gear tooth passage or ring magnet rotation. When paired with appropriate magnet geometry and signal conditioning, A1301ELHLT-T delivers repeatable analog output for interpolation or threshold-based commutation.
What is the magnetic sensitivity and linearity specification of the A1301ELHLT-T?
The A1301ELHLT-T has a typical magnetic sensitivity of 2.5 mV/G (range: 2.0–3.0 mV/G at 25°C) and linearity of ±2.5% over its specified operating range. This means that for a given magnetic field, the output voltage deviates no more than ±2.5% from the ideal straight-line response-critical for high-fidelity position reconstruction in closed-loop control systems using A1301ELHLT-T.
A1301ELHLT-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- SOT-23W
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- Analog Voltage
- Sensing Range:
- -
- Voltage - Supply:
- 4.5V ~ 6V
- Current - Supply (Max):
- 11mA
- Current - Output (Max):
- 10mA
- Resolution:
- -
- Bandwidth:
- 20kHz
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Supplier Device Package:
- SOT-23W
- Mounting Type:
- Surface Mount
A1301ELHLT-T FAQ
1.How can I place an order for A1301ELHLT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1301ELHLT-T 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 A1301ELHLT-T reliable?
The price and inventory of A1301ELHLT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1301ELHLT-T is usually 5 days.
3.What payment methods are accepted for A1301ELHLT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1301ELHLT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1301ELHLT-T?
A1301ELHLT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1301ELHLT-T 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 A1301ELHLT-T?
For technical support, including A1301ELHLT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1301ELHLT-T requirements.
6.How does Aetrix verify that A1301ELHLT-T is sourced from the original manufacturer or authorized distributors?
All A1301ELHLT-T 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 A1301ELHLT-T meets industry standards.
7.What is the process for return or replacement of A1301ELHLT-T?
All A1301ELHLT-T units undergo pre-shipment inspection (PSI). If there is an issue with A1301ELHLT-T, 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 A1301ELHLT-T part is unused and in its original packaging.
Return procedure for A1301ELHLT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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