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Allegro MicroSystems A1302KLHLX-T
- Part No.:
- A1302KLHLX-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- SOT-23W
- Datasheet:
-
A1302KLHLX-T.pdf
- Description:
- SENSOR HALL EFFECT ANALOG SOT23W
- Quantity:
- Payment:
- Shipping:
Inventory:4,794
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Product details
Overview
A1302KLHLX-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 features 1.3 mV/G typical sensitivity, –40°C to 125°C extended temperature operation, and 4.5–6.0 V supply range. Used in industrial position sensing for rotational and linear motion where high-temperature stability and rail-to-rail ratiometric output are required.
For engineers reviewing the A1302KLHLX-T datasheet, A1302KLHLX-T pinout, A1302KLHLX-T application, or A1302KLHLX-T equivalent, this page delivers verified specifications, package mapping, terminal roles, real-world use cases, and validated alternative options for robust magnetic sensing design-in.
Technical Context
The A1302KLHLX-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 quiescent output voltage (VOUTQ) and magnetic sensitivity scale directly with supply voltage (VCC), maintaining accuracy across supply variations.
Internal end-of-line gain and offset trimming achieves ±2.5% linearity and ±3.0% symmetry over temperature. The device operates with fast 3–5 μs power-on time and delivers 20 kHz bandwidth with 150 μVrms wideband output noise under 10 kHz filtering - enabling responsive, low-drift analog position feedback in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity | 1.3 mV/G typical at 25°C; enables precise analog field measurement with ±0.45 mV/G variation over full temperature range |
| Quiescent Output Voltage | 2.5 V ±0.1 V at 5 V supply; ratiometric to VCC, stays at 50% of supply across operating conditions |
| Supply Voltage Range | 4.5–6.0 V; supports stable operation in industrial 5 V rails with margin for ripple and dropouts |
| Operating Temperature | –40°C to +125°C; qualified for under-hood, motor control, and factory automation environments |
| Output Bandwidth | 20 kHz; sufficient for real-time monitoring of rotating shafts up to ~120,000 RPM with 1-pole response |
| Power-On Time | 3–5 μs; allows rapid system wake-up and deterministic timing in cyclic sensing applications |
| Output Noise | 150 μVrms (≤10 kHz filter); supports sub-gauss resolution without external amplification |
Pinout & Package
Package: 3-pin SOT-23W (LH suffix), surface-mount, lead-free with 100% matte tin plating. Dimensions per Allegro DWG-802840: 2.98 × 1.60 × 1.00 mm, branded face orientation defined.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Positive supply input | Connects to 4.5–6.0 V rail; powers internal Hall element, amplifier, and output stage |
| VOUT | Analog output signal | Provides ratiometric, rail-to-rail voltage proportional to magnetic flux density (±1400 G range) |
| GND | Reference ground | Return path for supply current and output sink/source; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Ratiometric output | VOUTQ and sensitivity track VCC changes, eliminating need for separate voltage reference in supply-varying systems |
| End-of-line trimming | Factory-programmed gain/offset compensation ensures ±2.5% linearity and ±3.0% symmetry without user calibration |
| Fast power-on response | 3–5 μs wake-up enables burst-mode sensing to reduce average power in battery-powered applications |
| Robust ESD performance | Qualified to >4 kV HBM, supporting reliable handling and assembly in standard manufacturing lines |
| High-temperature operation | Specified performance maintained to +125°C ambient, enabling direct mounting on motors and actuators |
Applications
| Motor Commutation Feedback | Rotary Position Sensing |
|---|---|
Use Scenario: Detecting rotor pole position in BLDC motors for electronic commutation. IC Role / Device Role / Timing Role: Analog magnetic field transducer providing continuous angular position feedback to MCU-based motor controller. Use Value: 1.3 mV/G sensitivity and 20 kHz bandwidth support accurate 120° electrical phase detection at speeds up to 120,000 RPM. | Use Scenario: Measuring angular displacement of a rotating cam or gear in industrial valve actuation. IC Role / Device Role / Timing Role: Linear Hall sensor converting mechanical rotation into proportional analog voltage for ADC sampling. Use Value: Ratiometric output eliminates supply regulation requirement, simplifying power design while maintaining ±2.5% linearity over –40°C to +125°C. |
| Linear Actuator Position | Current Sensing (Indirect) |
Use Scenario: Monitoring piston extension in hydraulic cylinders using back-iron magnet coupling. IC Role / Device Role / Timing Role: Contactless linear displacement transducer interfacing directly to analog front-end or comparator. Use Value: 3–5 μs power-on time enables synchronized sampling with actuator motion cycles, reducing latency in closed-loop control. | Use Scenario: Measuring DC bus current via magnetic field around a conductor in power inverters. IC Role / Device Role / Timing Role: Open-loop current sensor where output voltage correlates to conductor current magnitude and polarity. Use Value: 150 μVrms output noise and rail-to-rail swing allow sub-ampere resolution without external amplification or filtering. |
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 5.0 mV/G sensitivity; same LH package; wider 3.0–5.5 V supply range; lower max temp (85°C) | Better resolution for low-field sensing but unsuitable for >85°C environments like motor housings | Select when field strength is <300 G and ambient stays ≤85°C; avoid for under-hood or high-temp industrial use |
| MELEXIS MLX90242ELD-AAA-000-SP | Programmable sensitivity (1.0–2.5 mV/G); integrated EEPROM; same SOT23-3 package; 2.7–5.5 V supply | Enables field calibration and custom transfer functions but requires I²C programming infrastructure | Choose when system-level calibration or multi-point linearization is needed; adds firmware complexity |
Compared with A1302KLHLX-T, the A1324 offers higher sensitivity at reduced temperature capability, while the MLX90242 provides programmability at the cost of added interface overhead - making A1302KLHLX-T optimal for fixed-gain, high-temperature, low-complexity analog sensing.
Availability
A1302KLHLX-T is available at Aetrix Electronics and suitable for industrial motor control, automotive HVAC actuators, and factory automation systems requiring stable component supply across extended temperature ranges.
Supply support for A1302KLHLX-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 and manufacturer of high-performance magnetic sensors and power ICs, headquartered in Worcester, Massachusetts.
The A130x family targets contactless position and motion sensing in demanding industrial and automotive applications, emphasizing ratiometric accuracy, thermal stability, and robust analog output integrity.
FAQ
What is the operating temperature range of the A1302KLHLX-T?
The A1302KLHLX-T is rated for operation from –40°C to +125°C ambient temperature. This K-grade qualification makes it suitable for under-hood automotive applications, industrial motor drives, and factory equipment where thermal stress is significant. Performance parameters including sensitivity, quiescent output voltage, and linearity are guaranteed across this full range per Allegro's A1302-DS Rev. 13 specification.
Does the A1302KLHLX-T require external components for basic operation?
No, the A1302KLHLX-T operates as a fully integrated analog sensor with no external passive components required for core functionality. A bypass capacitor (typically 0.1 µF ceramic) between VCC and GND is recommended for noise suppression, but the internal amplifier, Hall element, and CMOS output stage are self-contained. The A1302KLHLX-T delivers ratiometric, rail-to-rail analog output directly usable by an ADC or comparator.
How does the ratiometric behavior of the A1302KLHLX-T affect system design?
The A1302KLHLX-T's ratiometric architecture means both its quiescent output voltage (VOUTQ) and magnetic sensitivity scale linearly with supply voltage (VCC). This eliminates the need for a precision voltage reference in the signal chain - if the same VCC supplies both the A1302KLHLX-T and the ADC reference, supply-induced errors cancel. Designers benefit from simplified power architecture and improved system-level accuracy without additional calibration.
Can the A1302KLHLX-T detect both north and south magnetic poles?
Yes, the A1302KLHLX-T provides bipolar output: a south-polarity (+B) magnetic field increases VOUT above the quiescent level (2.5 V at 5 V supply), while a north-polarity (–B) field decreases VOUT proportionally. This enables direction-sensitive position sensing - for example, distinguishing clockwise vs. counterclockwise rotation or push vs. pull linear motion - without external signal inversion circuitry.
What is the pin configuration and marking convention for the A1302KLHLX-T package?
The A1302KLHLX-T uses the LH (SOT-23W) package with three terminals: Pin 1 = VCC, Pin 2 = VOUT, Pin 3 = GND. The branded face includes "NNT" marking where "NN" indicates the last two digits of the part number (02) and "T" denotes the temperature grade (K). Physical orientation follows standard SOT-23W land pattern per Allegro drawing 802840, with active Hall element centered beneath the branded top surface.
A1302KLHLX-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 ~ 125°C
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Supplier Device Package:
- SOT-23W
- Mounting Type:
- Surface Mount
A1302KLHLX-T FAQ
1.How can I place an order for A1302KLHLX-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1302KLHLX-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 A1302KLHLX-T reliable?
The price and inventory of A1302KLHLX-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1302KLHLX-T is usually 5 days.
3.What payment methods are accepted for A1302KLHLX-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1302KLHLX-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1302KLHLX-T?
A1302KLHLX-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1302KLHLX-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 A1302KLHLX-T?
For technical support, including A1302KLHLX-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1302KLHLX-T requirements.
6.How does Aetrix verify that A1302KLHLX-T is sourced from the original manufacturer or authorized distributors?
All A1302KLHLX-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 A1302KLHLX-T meets industry standards.
7.What is the process for return or replacement of A1302KLHLX-T?
All A1302KLHLX-T units undergo pre-shipment inspection (PSI). If there is an issue with A1302KLHLX-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 A1302KLHLX-T part is unused and in its original packaging.
Return procedure for A1302KLHLX-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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