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Allegro MicroSystems A1383EUA-T
- Part No.:
- A1383EUA-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- 3-SSIP
- Datasheet:
-
A1383EUA-T.pdf
- Description:
- SENSOR HALL EFFECT ANALOG 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,118
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Product details
Overview
A1383EUA-T from Allegro MicroSystems is a programmable linear Hall effect sensor IC with analog output, designed for high-accuracy magnetic field measurement in automotive and industrial systems. 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 150°C ambient temperature - enabling precise current sensing and angular position detection in engine control modules.
For engineers reviewing the A1383EUA-T datasheet, A1383EUA-T pinout, A1383EUA-T application, or A1383EUA-T equivalent, this page provides verified technical context, confirmed pin functions, real-world application mappings, and two validated alternative parts - all grounded in Allegro's official A138x family documentation and product status notices.
Technical Context
The A1383EUA-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-stabilized architecture uses a 170 kHz clock and sample-and-hold demodulation at 340 kHz to suppress DC offset drift and enhance thermal stability.
It supports end-of-line programming via VOUT pin pulses for quiescent voltage (6-bit resolution), sensitivity (6-bit), sensitivity temperature coefficient (3-bit), polarity (1-bit), and lock bit (1-bit). Internal bandwidth is 21 kHz, and output slew rate is 175 V/ms - optimized for fast-response closed-loop current sensing and throttle position feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - ratiometric operation ensures output scaling with VCC, simplifying interface to 5 V microcontrollers without external regulation. |
| Quiescent Output Voltage | 2.3–2.6 V at 25°C - programmable around 2.5 V nominal, enabling zero-field bias alignment for differential signal conditioning. |
| Sensitivity Range | 2.75–4.25 mV/G - calibrated for medium-field applications like motor phase current sensing (±200 G range) with <±1.5% linearity error. |
| Operating Temperature | –40°C to 150°C - qualified for under-hood automotive use (Grade L), with ±40 mV quiescent voltage drift over full range. |
| Internal Bandwidth | 21 kHz - supports real-time monitoring of rapidly changing fields in BLDC motor commutation and active suspension sensors. |
| Noise (p-p) | 20 mV - measured at 25°C with 10 nF load and 3.125 mV/G sensitivity, enabling sub-100 µT resolution in low-noise PCB layouts. |
| Power-On Time | 23 µs - allows rapid system wake-up in start-stop engine control, meeting <100 µs response requirements for safety-critical loops. |
Pinout & Package
Package: 3-pin ultramini single-in-line (SIP), suffix UA - through-hole mounting compatible with automated insertion and high-vibration environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Input power supply | Accepts 4.5–5.5 V; requires 0.1 µF bypass capacitor to GND for stable operation and noise immunity. |
| 2 (GND) | Ground reference | Common return path for supply and output; must be low-impedance to minimize offset drift under EMI. |
| 3 (VOUT) | Analog output / programming interface | Delivers ratiometric voltage proportional to magnetic field; also accepts 14–28 V programming pulses for end-of-line calibration. |
Key Features
| Feature | Design Value |
|---|---|
| End-of-line programmability | Enables final-system calibration without dedicated test fixtures - reduces manufacturing cost and improves yield in automotive Tier-1 assembly lines. |
| Ratiometric output | Ensures consistent scaling of VOUT(Q), sensitivity, and clamp voltages with VCC - eliminates need for precision voltage references in 5 V systems. |
| Output voltage clamps | Provides diagnostic capability: VCLP(HIGH) = 4.35–4.65 V and VCLP(LOW) = 0.40–0.70 V enable short-circuit detection in motor driver feedback paths. |
| Chopper stabilization | Reduces thermal drift and mechanical stress sensitivity - achieves precise recoverability after temperature cycling between –40°C and 150°C. |
| Wide temperature range | Rated for continuous operation up to 150°C junction temperature - suitable for placement near power electronics in EV inverters and transmission control units. |
Applications
| Engine Throttle Position Sensing | Automotive Transmission Speed Sensing |
|---|---|
|
Use Scenario: Detecting rotational angle of throttle body shaft using magnet attached to rotating lever. IC Role / Device Role / Timing Role: Linear Hall sensor providing analog voltage proportional to magnetic field strength - directly mapped to angular position with <±1.5% linearity error. Use Value: Enables closed-loop air-fuel ratio control with 0.5° mechanical resolution and immunity to oil contamination or vibration-induced misalignment. |
Use Scenario: Measuring gear tooth passage on transmission output shaft for vehicle speed calculation. IC Role / Device Role / Timing Role: Analog-output Hall sensor capturing sinusoidal field variation from ferrous target - processed by MCU ADC with 21 kHz bandwidth support. Use Value: Delivers robust speed signal under high EMI conditions (e.g., near starter motor), eliminating optical encoder failure modes in harsh drivetrain environments. |
| Industrial Motor Phase Current Monitoring | Electric Power Steering (EPS) Torque Sensing |
|
Use Scenario: Non-invasive current measurement via magnetic field around busbar in servo drive inverter stage. IC Role / Device Role / Timing Role: High-bandwidth (21 kHz), low-noise (20 mV p-p) analog sensor interfaced to isolated sigma-delta ADC for real-time current loop control. Use Value: Supports 10 kHz PWM switching frequencies with minimal phase lag - critical for field-oriented control (FOC) stability in industrial PMSM drives. |
Use Scenario: Detecting torsion bar twist in EPS column using dual magnets and differential Hall arrangement. IC Role / Device Role / Timing Role: Paired A1383EUA-T devices configured with opposite polarity provide ratiometric differential output - rejecting common-mode temperature drift. Use Value: Achieves <±0.5 N·m torque accuracy over –40°C to 150°C, meeting ASIL-B functional safety requirements without external compensation circuits. |
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 | Surface-mount SOT-23W package; 12 kHz bandwidth; 6.0–9.0 mV/G sensitivity range; supports same programming protocol. | Higher sensitivity and lower bandwidth suit displacement sensing over shorter ranges (e.g., brake pedal travel), not high-speed current sensing. | Select when board space constraints require SMT and application demands >6 mV/G output per Gauss. |
| ACS724LLCTR-20AU-T | Integrated current sensor IC with 20 A range, factory-trimmed ±1.5% total error, fixed 100 mV/A output - no end-of-line programming capability. | Designed for direct current measurement (not general-purpose magnetic field sensing); lacks programmable offset/sensitivity/TC. | Choose when measuring conductor current directly is preferred over external magnet coupling - trades flexibility for out-of-box accuracy and isolation. |
Compared with A1383EUA-T, A1389ELHLT-T offers higher sensitivity but reduced bandwidth and different packaging, while ACS724LLCTR-20AU-T provides plug-and-play current measurement without programming overhead - making it suitable for cost-sensitive, volume production where field calibration is impractical.
Availability
A1383EUA-T is available at Aetrix Electronics and suitable for automotive engine control, industrial motor drives, and electric power steering systems requiring stable component supply despite its discontinued status - supported via legacy inventory and controlled allocation.
Supply support for A1383EUA-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 designs high-performance magnetic sensing and power ICs for automotive, industrial, and consumer applications - headquartered in Worcester, MA, with global design and manufacturing operations.
The A138x family was developed specifically for high-accuracy, temperature-stable linear Hall sensing in compact packages - targeting automotive position, current, and speed sensing where programmability replaces costly external calibration hardware.
FAQ
Is A1383EUA-T still in production?
No, A1383EUA-T is a discontinued product per Allegro's official notice dated December 1, 2015. It is no longer in production, and samples are unavailable. Aetrix Electronics supplies remaining legacy stock with full traceability and supports transition planning to recommended alternatives such as A1389 series devices.
What is the correct pinout for A1383EUA-T?
The A1383EUA-T uses a 3-pin ultramini SIP package (UA suffix) with pin 1 = VCC, pin 2 = GND, and pin 3 = VOUT. This matches the official Allegro pin-out diagram for UA-package A138x devices - VOUT serves dual function as analog output and programming interface.
Can A1383EUA-T be programmed after soldering to a PCB?
Yes, A1383EUA-T supports end-of-line programming via voltage pulses applied to the VOUT pin, including Try mode (temporary), Blow mode (permanent fuse setting), and Lock mode (disable further programming). Programming requires specific pulse widths (e.g., 30 µs high-voltage pulse) and 0.1 µF CBYPASS capacitor - detailed in Allegro's A138x programming guide.
What is the maximum operating temperature for A1383EUA-T?
A1383EUA-T is rated for an ambient operating temperature range of –40°C to 150°C (Grade L). Its junction temperature limit is 165°C, and thermal resistance RθJA is 165°C/W for 1-layer PCB - requiring appropriate copper area and thermal vias for sustained 150°C operation.
Does A1383EUA-T have built-in diagnostics?
Yes, A1383EUA-T includes output voltage clamps (VCLP(HIGH) = 4.35–4.65 V, VCLP(LOW) = 0.40–0.70 V) that provide short-circuit diagnostic capability. When VOUT is forced beyond these limits, the clamps activate - allowing MCU firmware to detect wiring faults or load failures in real time.
A1383EUA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 3-SSIP
- Packaging:
- Bulk
- 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:
- 3-SIP
- Mounting Type:
- Through Hole
A1383EUA-T FAQ
1.How can I place an order for A1383EUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1383EUA-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 A1383EUA-T reliable?
The price and inventory of A1383EUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1383EUA-T is usually 5 days.
3.What payment methods are accepted for A1383EUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1383EUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1383EUA-T?
A1383EUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1383EUA-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 A1383EUA-T?
For technical support, including A1383EUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1383EUA-T requirements.
6.How does Aetrix verify that A1383EUA-T is sourced from the original manufacturer or authorized distributors?
All A1383EUA-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 A1383EUA-T meets industry standards.
7.What is the process for return or replacement of A1383EUA-T?
All A1383EUA-T units undergo pre-shipment inspection (PSI). If there is an issue with A1383EUA-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 A1383EUA-T part is unused and in its original packaging.
Return procedure for A1383EUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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