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Allegro MicroSystems A1302ELHLT-T
- Part No.:
- A1302ELHLT-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- SOT-23W
- Datasheet:
-
A1302ELHLT-T.pdf
- Description:
- SENSOR HALL EFFECT ANALOG SOT23W
- Quantity:
- Payment:
- Shipping:
Inventory:3,478
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Product details
Overview
A1302ELHLT-T from Allegro MicroSystems is a continuous-time, ratiometric, linear Hall-effect sensor IC optimized for accurate voltage output proportional to applied magnetic field strength. It delivers 1.3 mV/G typical sensitivity, 50% VCC quiescent output, and operates from 4.5 V to 6.0 V over –40°C to +85°C ambient range. Used in industrial position sensing for linear and rotational motion detection.
For engineers reviewing the A1302ELHLT-T datasheet, A1302ELHLT-T pinout, A1302ELHLT-T application, or A1302ELHLT-T equivalent, this page provides verified technical context, package mapping, real-world use cases, and validated alternative options for design-in decisions.
Technical Context
The A1302ELHLT-T integrates a Hall element, linear amplifier, and CMOS Class A output stage on a single die, minimizing noise and signal integrity issues common in low-level analog sensing. Its ratiometric architecture ensures both quiescent output voltage (VOUTQ) and magnetic sensitivity scale linearly with supply voltage (VCC).
Internal end-of-line gain and offset trimming achieves ±2.5% linearity and ±3.0% symmetry over temperature. Output bandwidth is 20 kHz, power-on time is 3–5 μs, and wideband output noise is 150 μV rms with ≤10 kHz external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity | 1.3 mV/G typical at 25°C - enables precise low-field detection with predictable scaling across supply voltage |
| Quiescent Output | 2.5 V ±0.1 V at VCC = 5 V - rail-to-rail compatible output centered at 50% VCC for bidirectional field sensing |
| Supply Range | 4.5 V to 6.0 V - supports stable operation across industrial 5 V rails with margin for ripple and drop |
| Operating Temp | –40°C to +85°C - qualified for non-automotive industrial environments without derating |
| Output Bandwidth | 20 kHz - sufficient for motor commutation, speed sensing, and fast-position feedback loops |
| Power-On Time | 3–5 μs - enables rapid system wake-up and real-time response in duty-cycled applications |
| Output Noise | 150 μV rms (≤10 kHz filter) - supports high-resolution analog-to-digital conversion without oversampling penalty |
Pinout & Package
Package: 3-pin SOT-23W (LH suffix), surface-mount, lead-free with 100% matte tin plating. Dimensions per Allegro drawing 802840: 2.98 × 1.60 × 1.00 mm, branded face orientation defined.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Connects to regulated 4.5–6.0 V rail; bypass capacitor required at device pad for noise immunity |
| VOUT (Pin 2) | Analog output signal | Ratiometric, rail-to-rail, CMOS Class A - drives ADC inputs directly or low-impedance loads up to 10 mA |
| GND (Pin 3) | Reference ground | Must be connected to clean system ground plane; shares return path with VCC decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Ratiometric output | Both VOUTQ and sensitivity track VCC changes - eliminates need for separate voltage reference in supply-varying systems |
| Factory-trimmed gain/offset | End-of-line laser trimming ensures ±2.5% linearity and ±3.0% symmetry without user calibration |
| Low-noise analog path | 150 μV rms output noise enables 12-bit+ resolution with standard 10 kHz anti-aliasing filters |
| Fast power-on response | 3–5 μs wake-up allows microsecond-level timing control in burst-mode sensing applications |
| Robust ESD performance | Qualified to >4 kV HBM - reduces need for external protection in industrial I/O zones |
Applications
| Brushless DC Motor Commutation | Linear Position Feedback |
|---|---|
Use Scenario: Detect rotor magnet polarity in BLDC motors for electronic commutation timing. IC Role / Device Role / Timing Role: Analog Hall sensor providing continuous voltage output proportional to magnet position relative to stator. Use Value: 20 kHz bandwidth and 3–5 μs power-on time support high-RPM motor control with minimal latency. |
Use Scenario: Measure displacement of ferrous target moving parallel to sensor face in factory automation. IC Role / Device Role / Timing Role: Linear field-to-voltage transducer converting mm-scale motion into calibrated analog voltage. Use Value: 1.3 mV/G sensitivity and ±2.5% linearity enable sub-millimeter resolution without digital compensation. |
| Rotary Encoder Alternative | Industrial Flow Meter Sensing |
Use Scenario: Replace optical encoder in dusty or humid environments using rotating magnet disk. IC Role / Device Role / Timing Role: Continuous analog angle sensor generating voltage waveform synchronized to shaft rotation. Use Value: Ratiometric output maintains accuracy across varying 5 V supply conditions common in PLC backplanes. |
Use Scenario: Monitor turbine blade passage in liquid/gas flow meters via embedded magnet detection. IC Role / Device Role / Timing Role: High-reliability magnetic field detector triggering pulse counting or frequency measurement. Use Value: –40°C to +85°C rating and solid-state construction ensure long-term stability in uncontrolled mechanical enclosures. |
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 |
|---|---|---|---|
| AL33025EUA-T | 1.5 mV/G sensitivity, SIP package, same –40°C to +85°C range, but no SOT-23W option | Through-hole mounting only; lacks surface-mount footprint compatibility with A1302ELHLT-T | Select when board assembly requires through-hole reliability or legacy SIP layout reuse |
| SS495A | 1.4 mV/G sensitivity, TO-92 package, wider supply range (3.0–6.5 V), but higher output noise (250 μV rms) | Requires mechanical mounting and external decoupling; not suitable for high-density SMT layouts | Choose for cost-sensitive, low-frequency (<5 kHz) applications where SMT density is not critical |
Compared with AL33025EUA-T and SS495A, the A1302ELHLT-T offers superior SMT integration via SOT-23W, lower noise floor, and tighter linearity-making it optimal for space-constrained industrial motion control where analog precision and PCB area matter.
Availability
A1302ELHLT-T is available at Aetrix Electronics and suitable for industrial position sensing, BLDC motor commutation, and rotary encoder replacement requiring stable component supply across extended temperature ranges.
Supply support for A1302ELHLT-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 designer of high-performance magnetic sensing and power ICs, founded in 1989 and headquartered in Worcester, Massachusetts.
The A130x family was developed specifically for robust, ratiometric linear Hall sensing in industrial motion control-emphasizing temperature stability, low noise, and factory-trimmed accuracy without user calibration.
FAQ
What is the operating temperature range for the A1302ELHLT-T?
The A1302ELHLT-T is rated for an ambient operating temperature range of –40°C to +85°C. This specification applies to the LH (SOT-23W) package variant and is validated across full electrical performance parameters including sensitivity, quiescent output, and linearity. The device maintains ratiometric behavior and 20 kHz bandwidth throughout this range.
Does the A1302ELHLT-T require external calibration?
No, the A1302ELHLT-T does not require external calibration. Allegro performs end-of-line gain and offset trimming during manufacturing, delivering guaranteed linearity of ±2.5% and symmetry of ±3.0% at 25°C. These specifications hold across the full –40°C to +85°C range without user adjustment.
What is the supply voltage range for reliable operation of the A1302ELHLT-T?
The A1302ELHLT-T operates reliably from 4.5 V to 6.0 V. Below 4.5 V, output swing and bandwidth degrade; above 6.0 V risks damage per absolute maximum ratings. At 5.0 V nominal, quiescent output is 2.5 V ±0.1 V, and sensitivity remains 1.3 mV/G typical - all values scale ratiometrically with VCC.
Can the A1302ELHLT-T replace the A1301ELHLT-T in an existing design?
The A1302ELHLT-T can replace the A1301ELHLT-T only if reduced sensitivity (1.3 mV/G vs. 2.5 mV/G) and corresponding signal chain gain adjustments are acceptable. Both share identical pinout, package, supply range, and temperature rating-but output voltage per gauss differs by >2×, requiring recalibration or amplifier gain change.
What is the meaning of "ratiometric" in the A1302ELHLT-T datasheet?
"Ratiometric" means the A1302ELHLT-T's quiescent output voltage (VOUTQ) and magnetic sensitivity both scale linearly with supply voltage (VCC). For example, if VCC drops from 5.0 V to 4.7 V, VOUTQ shifts from 2.5 V to ~2.35 V and sensitivity scales proportionally - preserving measurement accuracy without external voltage references.
A1302ELHLT-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
A1302ELHLT-T FAQ
1.How can I place an order for A1302ELHLT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1302ELHLT-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 A1302ELHLT-T reliable?
The price and inventory of A1302ELHLT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1302ELHLT-T is usually 5 days.
3.What payment methods are accepted for A1302ELHLT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1302ELHLT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1302ELHLT-T?
A1302ELHLT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1302ELHLT-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 A1302ELHLT-T?
For technical support, including A1302ELHLT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1302ELHLT-T requirements.
6.How does Aetrix verify that A1302ELHLT-T is sourced from the original manufacturer or authorized distributors?
All A1302ELHLT-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 A1302ELHLT-T meets industry standards.
7.What is the process for return or replacement of A1302ELHLT-T?
All A1302ELHLT-T units undergo pre-shipment inspection (PSI). If there is an issue with A1302ELHLT-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 A1302ELHLT-T part is unused and in its original packaging.
Return procedure for A1302ELHLT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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