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Allegro MicroSystems A1383ELHLT-T
- Part No.:
- A1383ELHLT-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- SOT-23W
- Datasheet:
-
A1383ELHLT-T.pdf
- Description:
- SENSOR HALL EFFECT ANALOG SOT23W
- Quantity:
- Payment:
- Shipping:
Inventory:1,501
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Product details
Overview
A1383ELHLT-T from Allegro MicroSystems is a programmable linear Hall effect sensor IC with analog output, designed for high-accuracy magnetic field measurement in compact surface-mount applications. It delivers ratiometric voltage output (2.3–2.6 V quiescent), user-programmable sensitivity (2.75–4.25 mV/G), and operates across –40°C to +85°C ambient temperature. Its 21 kHz bandwidth and 20 mVP-P noise support precision current sensing and angular position feedback in automotive throttle and brake pedal modules.
For engineers reviewing the A1383ELHLT-T datasheet, A1383ELHLT-T pinout, A1383ELHLT-T application, or A1383ELHLT-T equivalent, this page provides verified technical context, confirmed pin functions, real-world application mappings, and validated alternative options - all grounded in Allegro's official A138x family documentation and selection guide.
Technical Context
The A1383ELHLT-T integrates a BiCMOS monolithic circuit featuring a Hall element, dynamic offset cancellation, temperature-compensated gain amplifier, and clamped low-impedance output stage. Its chopper stabilization operates at 170 kHz, enabling precise DC field measurement while rejecting thermal drift and mechanical stress effects.
It supports end-of-line programming via VOUT pin using three voltage levels (5.5 V / 15 V / 27 V) to configure quiescent voltage (6-bit resolution), sensitivity (6-bit), sensitivity temperature coefficient (3-bit), polarity, and lock bit. All programmed parameters remain stable after power cycling unless locked.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - compatible with standard 5 V microcontroller I/O rails and automotive 5 V regulators. |
| Quiescent Output Voltage Range | 2.3–2.6 V - programmable around 2.5 V reference, enabling direct interfacing with 10-bit ADCs without level-shifting. |
| Sensitivity Range | 2.75–4.25 mV/G - calibrated for ±200 G full-scale operation, supporting 0.5° angular resolution in rotary position sensing. |
| Internal Bandwidth | 21 kHz - sufficient for real-time monitoring of fast-moving mechanical components such as crankshaft or camshaft position. |
| Noise (peak-to-peak) | 20 mV - measured at 25°C with 10 nF load and 3.125 mV/G sensitivity, enabling sub-10 G detection resolution. |
| Operating Temperature | –40°C to +85°C - qualified for under-hood engine control unit (ECU) mounting locations per AEC-Q100 Class 2 requirements. |
| Power-On Time | 23 µs - ensures rapid system readiness after cold start, critical for safety-critical actuator feedback loops. |
Pinout & Package
Package: 3-pin SOT-23W (LH suffix), thin-profile surface-mount package with exposed thermal pad (RθJA = 228°C/W on 1-layer PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Accepts 4.5–5.5 V; requires 0.1 µF bypass capacitor to GND for stable operation and noise immunity. |
| GND (Pin 2) | Ground reference | Common return path for supply and output; must be low-impedance to minimize offset error from ground bounce. |
| VOUT (Pin 3) | Analog output & programming interface | Delivers ratiometric voltage proportional to magnetic flux density; also accepts 15 V/27 V pulses for permanent fuse-based programming. |
Key Features
| Feature | Design Value |
|---|---|
| End-of-line programmability | Enables final calibration after PCB assembly - eliminates pre-mounting sensor trimming and reduces test time by >40%. |
| Ratiometric output | Quiescent voltage, sensitivity, and clamp levels scale with VCC - removes need for separate voltage reference in cost-sensitive ECU designs. |
| Output voltage clamps | High clamp: 4.35–4.65 V; low clamp: 0.40–0.70 V - provides short-circuit diagnostics and prevents downstream ADC saturation during fault conditions. |
| Chopper-stabilized architecture | 170 kHz chopping frequency with sample-and-hold demodulation - achieves ±1.5% linearity and <±40 mV quiescent drift over full temperature range. |
| Temperature-stable sensitivity | Programmable TCSENS (0–0.095%/°C) allows compensation for magnet temperature coefficients in motor current sensing. |
Applications
| Automotive Throttle Position Sensing | Industrial Motor Current Monitoring |
|---|---|
|
Use Scenario: Detecting rotational angle of throttle body shaft in gasoline direct injection engines. IC Role / Device Role / Timing Role: Linear Hall sensor providing analog voltage output proportional to magnetic field from rotating ferrous target. Use Value: 21 kHz bandwidth enables real-time response to rapid throttle transients; ±1.5% linearity error ensures accurate air-fuel ratio calculation. |
Use Scenario: Measuring DC bus current in variable-frequency drives using closed-loop magnetic field integration. IC Role / Device Role / Timing Role: High-stability analog front-end converting conductor-induced flux into ratiometric voltage for isolated ADC sampling. Use Value: 20 mVP-P noise floor supports ≤0.5 A resolution at 200 A full scale; ratiometric output eliminates supply rail variation errors. |
| Brake Pedal Position Feedback | Rotary Encoder for HVAC Actuators |
|
Use Scenario: Redundant position feedback for electronic brake boosters in ADAS-equipped vehicles. IC Role / Device Role / Timing Role: Primary analog sensor in dual-redundant architecture, delivering fail-safe voltage output to brake control module. Use Value: –40°C to +85°C rating ensures reliability in extreme under-hood environments; output clamps enable open/short-wire diagnostics per ISO 26262 ASIL-B. |
Use Scenario: Compact angular position sensing in automotive HVAC blend door actuators. IC Role / Device Role / Timing Role: Surface-mount Hall sensor detecting magnet rotation on gear-driven damper shaft. Use Value: SOT-23W package (1.3 mm height) fits tight space constraints; programmable quiescent voltage simplifies matching to 3.3 V MCU ADC reference. |
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 |
|---|---|---|---|
| A1389ELHLT-T | Successor device with extended –40°C to +150°C operating range, improved 15 mVP-P noise, and enhanced ESD robustness (±8 kV HBM). | Required for new designs targeting under-hood placement beyond 85°C ambient, e.g., transmission oil temperature sensors. | Select A1389ELHLT-T when designing for AEC-Q100 Grade 0 (–40°C to +150°C) or requiring higher EMC immunity. |
| ACS712ELCTR-20A-T | Integrated current sensor IC with built-in conductor; fixed 100 mV/A sensitivity; no programmability; wider 5 V ±10% supply range. | Used where direct current measurement (not magnetic field) is needed, and board space permits SOIC-8 footprint. | Choose ACS712ELCTR-20A-T only when measuring current through an integrated conductor - not suitable for external magnet-based position sensing. |
Compared with A1383ELHLT-T, A1389ELHLT-T offers broader temperature capability and lower noise but shares identical pinout and programming protocol; ACS712ELCTR-20A-T provides current-sensing convenience but lacks field-programmability and magnetic position flexibility.
Availability
A1383ELHLT-T is available at Aetrix Electronics and suitable for automotive throttle position sensing, industrial motor current monitoring, brake pedal feedback systems, and HVAC actuator position detection requiring stable component supply despite its discontinued status.
Supply support for A1383ELHLT-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 A138x family was developed to deliver programmable, temperature-stable linear Hall sensing in miniature packages for safety-critical position and current feedback in engine control, braking, and powertrain systems.
FAQ
Is A1383ELHLT-T still in production?
No, A1383ELHLT-T is a discontinued product. Allegro ceased production as of December 1, 2015. Samples are no longer available, and it should not be purchased for new design applications. However, Aetrix Electronics maintains legacy inventory with full traceability for ongoing production support and repair programs.
What is the correct bypass capacitor value for A1383ELHLT-T?
The recommended bypass capacitor for A1383ELHLT-T is 0.1 µF placed between VCC and GND pins, as specified in the operating characteristics section of the A138x datasheet. This value ensures stable internal regulator operation and minimizes noise coupling into the analog signal path of the A1383ELHLT-T.
Can A1383ELHLT-T be reprogrammed after initial programming?
Yes, A1383ELHLT-T supports multiple programming cycles in Try mode for parameter verification before permanent fuse blowing. Once the LOCK bit is blown, however, all further programming-including reprogramming-is permanently disabled. The A1383ELHLT-T retains its programmed values across power cycles until locked.
What is the maximum magnetic field range measurable with A1383ELHLT-T?
At its maximum sensitivity setting (4.25 mV/G) and 2.6 V upper quiescent limit, A1383ELHLT-T supports up to ±612 G full-scale range before output clamping occurs. At minimum sensitivity (2.75 mV/G), the usable range extends to ±945 G - both values assume 5 V supply and standard 10 kΩ load conditions per the A1383ELHLT-T specification table.
Does A1383ELHLT-T require external calibration during manufacturing?
No, A1383ELHLT-T does not require external calibration. Its factory-trimmed baseline (VOUT(Q)init = 2.1 V, Sensinit = 2.1 mV/G) and programmable 6-bit quiescent voltage/sensitivity registers allow full end-of-line calibration using only the VOUT pin - eliminating laser trimming, external DACs, or calibration fixtures in final test.
A1383ELHLT-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 ~ 5.5V
- Current - Supply (Max):
- 8mA
- Current - Output (Max):
- 10mA
- Resolution:
- -
- Bandwidth:
- 21kHz
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Features:
- Programmable, Temperature Compensated
- Supplier Device Package:
- SOT-23W
- Mounting Type:
- Surface Mount
A1383ELHLT-T FAQ
1.How can I place an order for A1383ELHLT-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1383ELHLT-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 A1383ELHLT-T reliable?
The price and inventory of A1383ELHLT-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1383ELHLT-T is usually 5 days.
3.What payment methods are accepted for A1383ELHLT-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1383ELHLT-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1383ELHLT-T?
A1383ELHLT-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1383ELHLT-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 A1383ELHLT-T?
For technical support, including A1383ELHLT-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1383ELHLT-T requirements.
6.How does Aetrix verify that A1383ELHLT-T is sourced from the original manufacturer or authorized distributors?
All A1383ELHLT-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 A1383ELHLT-T meets industry standards.
7.What is the process for return or replacement of A1383ELHLT-T?
All A1383ELHLT-T units undergo pre-shipment inspection (PSI). If there is an issue with A1383ELHLT-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 A1383ELHLT-T part is unused and in its original packaging.
Return procedure for A1383ELHLT-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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