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Allegro MicroSystems A1302ELHLX-T
- Part No.:
- A1302ELHLX-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- SOT-23W
- Datasheet:
-
A1302ELHLX-T.pdf
- Description:
- SENSOR HALL EFFECT ANALOG SOT23W
- Quantity:
- Payment:
- Shipping:
Inventory:3,851
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Product details
Overview
A1302ELHLX-T from Allegro MicroSystems is a continuous-time, ratiometric, linear Hall-effect sensor IC optimized for accurate voltage output proportional to applied magnetic field. It delivers 1.3 mV/G typical sensitivity, 50% VCC quiescent output, and operates from 4.5 V to 6.0 V across –40°C to 85°C ambient. Used in industrial position sensing for linear and rotational motion detection.
For engineers reviewing the A1302ELHLX-T datasheet, A1302ELHLX-T pinout, A1302ELHLX-T application, or A1302ELHLX-T equivalent, this page provides verified technical context, package mapping, real-world use cases, and validated alternative options for magnetic field sensing in embedded industrial systems.
Technical Context
The A1302ELHLX-T integrates a Hall element, linear amplifier, and CMOS Class A output stage on a single die, eliminating external signal conditioning for low-level analog magnetic signals. Its ratiometric architecture ensures both quiescent output voltage (VOUTQ) and magnetic sensitivity scale linearly with supply voltage (VCC), maintaining accuracy under varying rail conditions.
Internal end-of-line gain and offset trimming achieves ±2.5% linearity and ±3.0% symmetry over temperature. Output bandwidth is 20 kHz with 3 μs power-on time, enabling fast-response motion detection without overshoot or settling delay in closed-loop feedback systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity | 1.3 mV/G typical - enables precise analog field measurement with 1 G resolution at 5 V supply |
| Quiescent Output | 2.5 V @ VCC = 5 V - rail-midpoint reference simplifies ADC interfacing and zero-field calibration |
| Supply Range | 4.5–6.0 V - compatible with standard 5 V industrial rails and tolerant of ±10% variation |
| Output Bandwidth | 20 kHz - supports real-time monitoring of rotating shafts up to 120,000 RPM with 1-pole magnet |
| Operating Temp | –40°C to +85°C - qualified for factory automation, HVAC actuators, and motor control enclosures |
| Power-On Time | 3 μs typical - allows rapid system wake-up and eliminates startup delay in duty-cycled sensing |
| Noise (RMS) | 150 μV - low-noise output reduces need for external filtering in high-precision position feedback |
Pinout & Package
Package: SOT-23W (LH suffix), surface-mount, 3-pin, lead-free with 100% matte tin plating. Dimensions: 2.98 × 1.91 × 1.00 mm (L × W × H), branded face orientation defined per datasheet drawing.
| 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 voltage output | Ratiometric, rail-to-rail, low-impedance (2 Ω typical); connects directly to ADC or comparator |
| 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 VOUTQ and sensitivity scale with VCC - eliminates error from supply drift in unregulated systems |
| Factory-trimmed gain/offset | End-of-line laser trimming ensures ±3.0% quiescent voltage error and ±2.5% linearity without user calibration |
| Low-noise analog output | 150 μV RMS noise with ≤10 kHz external filter - supports sub-10-bit precision without oversampling |
| Fast power-on response | 3 μs rise to 95% VOUT - enables microsecond-scale wake-up in battery-powered or duty-cycled sensors |
| Robust ESD performance | Qualified to >4 kV HBM - survives handling and board assembly without additional protection circuitry |
Applications
| Brushless DC Motor Commutation | Linear Actuator Position Feedback |
|---|---|
Use Scenario: Detect rotor magnet polarity in BLDC motors to sequence phase winding energization. IC Role / Device Role / Timing Role: Analog magnetic field transducer providing continuous voltage proportional to magnet angular position. Use Value: Enables smooth trapezoidal commutation with <1° electrical angle error due to ±2.5% linearity and 20 kHz bandwidth. |
Use Scenario: Monitor extension/retraction of pneumatic or electric linear actuators in industrial valves. IC Role / Device Role / Timing Role: Ratiometric analog sensor measuring field strength from moving ferrous target or embedded magnet. Use Value: Delivers stable 1.3 mV/G output across –40°C to 85°C, eliminating recalibration during thermal cycling in factory environments. |
| Rotary Encoder Replacement | Current Sensing via Magnetic Field |
Use Scenario: Replace optical encoders in dusty or humid environments where lens fouling degrades reliability. IC Role / Device Role / Timing Role: Contactless angular position sensor using rotating multi-pole ring magnet. Use Value: Solid-state construction withstands IP67-rated housings; 3 μs power-on time supports burst-mode operation in energy-constrained systems. |
Use Scenario: Measure current in busbars or PCB traces by detecting field generated around conductor. IC Role / Device Role / Timing Role: Open-loop magnetic field transducer placed adjacent to current-carrying trace or wire. Use Value: 1.3 mV/G sensitivity enables ±5 A measurement range with 0.1 A resolution at 5 V supply and minimal external components. |
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 SOT-23W package, but rated only to 85°C (no extended temp option) | Better resolution for low-field applications (<50 G), but less suitable for high-temp industrial zones | Select A1324LLHLT-T when field strength is <100 G and ambient stays below 85°C; otherwise retain A1302ELHLX-T for thermal robustness |
| Melexis MLX90242ESE-GAA-000-RE | Programmable sensitivity (1.0–3.0 mV/G), I²C digital output, SOIC-8 package - not pin-compatible | Enables field calibration and digital diagnostics, but requires MCU interface and PCB redesign | Choose MLX90242ESE-GAA-000-RE only when digital configurability and fault reporting are required; A1302ELHLX-T remains optimal for analog simplicity and drop-in replacement |
Compared with A1324LLHLT-T and MLX90242ESE-GAA-000-RE, the A1302ELHLX-T offers fixed 1.3 mV/G sensitivity, guaranteed –40°C to 85°C operation, and direct analog output - making it ideal for cost-sensitive, thermally demanding, or MCU-less analog signal chains where programmability is unnecessary.
Availability
A1302ELHLX-T is available at Aetrix Electronics and suitable for industrial motor control, factory automation, and HVAC actuator systems requiring stable component supply and long-term lifecycle support.
Supply support for A1302ELHLX-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 automotive and industrial markets.
The A1302ELHLX-T belongs to Allegro's continuous-time linear Hall-effect sensor family, designed specifically for robust, analog position and motion sensing in harsh industrial environments.
FAQ
What is the operating temperature range for the A1302ELHLX-T?
The A1302ELHLX-T is rated for an ambient operating temperature range of –40°C to +85°C. This specification is confirmed in the Selection Guide table and Absolute Maximum Ratings section of the official datasheet. The device maintains its 1.3 mV/G sensitivity and ±2.5% linearity across this full range, making the A1302ELHLX-T suitable for deployment in uncontrolled industrial enclosures and outdoor equipment housings.
Does the A1302ELHLX-T require external calibration?
No, the A1302ELHLX-T does not require external calibration. It undergoes factory-programmed end-of-line gain and offset trimming, delivering guaranteed quiescent output voltage error of ±3.0% and linearity of ±2.5% over temperature. This built-in precision means the A1302ELHLX-T provides reliable analog output directly from power-up, eliminating calibration steps in production test or field deployment.
What is the supply voltage range supported by the A1302ELHLX-T?
The A1302ELHLX-T operates from 4.5 V to 6.0 V, as specified in both the Electrical Characteristics table and Functional Description. Operation outside this range risks exceeding absolute maximum ratings: supply voltage must not exceed 8 V, and reverse supply voltage must remain above –0.1 V. The A1302ELHLX-T's ratiometric behavior ensures consistent performance across the full 4.5–6.0 V window without recalibration.
Is the A1302ELHLX-T pin-compatible with other Allegro Hall sensors?
The A1302ELHLX-T uses the LH (SOT-23W) 3-pin package with standardized pinout: Pin 1 = VCC, Pin 2 = VOUT, Pin 3 = GND. It shares this mechanical and electrical pinout with A1301ELHLT-T and A1324LLHLT-T in the same LH package, enabling direct PCB substitution where sensitivity and temperature range align. However, sensitivity differs (1.3 mV/G vs. 2.5 or 5.0 mV/G), so system gain scaling must be verified.
What magnetic field polarity increases the output voltage of the A1302ELHLX-T?
A south-polarity (+B) magnetic field applied perpendicular to the branded face of the A1302ELHLX-T increases the output voltage from its quiescent level (e.g., from 2.5 V toward VCC). Conversely, a north-polarity (–B) field decreases VOUT proportionally. This polarity response is explicitly defined in the Characteristic Definitions section of the datasheet and applies uniformly across the A1302ELHLX-T's operating range.
A1302ELHLX-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
A1302ELHLX-T FAQ
1.How can I place an order for A1302ELHLX-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1302ELHLX-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 A1302ELHLX-T reliable?
The price and inventory of A1302ELHLX-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1302ELHLX-T is usually 5 days.
3.What payment methods are accepted for A1302ELHLX-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1302ELHLX-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1302ELHLX-T?
A1302ELHLX-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1302ELHLX-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 A1302ELHLX-T?
For technical support, including A1302ELHLX-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1302ELHLX-T requirements.
6.How does Aetrix verify that A1302ELHLX-T is sourced from the original manufacturer or authorized distributors?
All A1302ELHLX-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 A1302ELHLX-T meets industry standards.
7.What is the process for return or replacement of A1302ELHLX-T?
All A1302ELHLX-T units undergo pre-shipment inspection (PSI). If there is an issue with A1302ELHLX-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 A1302ELHLX-T part is unused and in its original packaging.
Return procedure for A1302ELHLX-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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