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Allegro MicroSystems A1383LUA-T
- Part No.:
- A1383LUA-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- 3-SSIP
- Datasheet:
-
A1383LUA-T.pdf
- Description:
- SENSOR HALL EFFECT ANALOG 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,087
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Product details
Overview
A1383LUA-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), polarity, and sensitivity temperature coefficient, operating across –40°C to 150°C in a 3-pin ultramini through-hole SIP package.
For engineers reviewing the A1383LUA-T datasheet, A1383LUA-T pinout, A1383LUA-T application, or A1383LUA-T equivalent, this page provides verified technical context, confirmed pin functions, real-world application mappings, and two validated alternative parts for legacy design continuity and functional migration planning.
Technical Context
The A1383LUA-T integrates a BiCMOS monolithic circuit with a Hall element, dynamic offset cancellation, temperature-compensated gain amplifier, and clamped low-impedance output stage. Its 170 kHz chopper stabilization clock enables precise DC offset suppression and stable quiescent output under thermal cycling.
It supports end-of-line programming via voltage pulses applied to the VOUT pin for offset, sensitivity, TCSENS, and polarity - all stored permanently by blowing internal fuses. The device features 21 kHz small-signal bandwidth, 20 mVP-P typical noise (no external filter), and output clamps (0.40–0.70 V low / 4.35–4.65 V high) enabling short-circuit diagnostics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - operates ratiometrically; all key outputs scale linearly with VCC. |
| Quiescent Output Voltage | 2.3–2.6 V at 25°C - programmable 6-bit trim around nominal 2.5 V for system-level zero-point calibration. |
| Sensitivity Range | 2.75–4.25 mV/G - enables fine-tuned magnetic gain matching for specific air-gap or magnet strength requirements. |
| Internal Bandwidth | 21 kHz - supports fast-response position or current sensing up to ~3.3 kHz sinusoidal input without phase lag. |
| Operating Temperature | –40°C to 150°C - qualified for under-hood automotive and high-temp industrial motor control environments. |
| Output Noise (p-p) | 20 mV - measured at 25°C, CL = 10 nF, Sens = 3.125 mV/G; enables <±0.5% field resolution in unfiltered configurations. |
| Power-On Time | 23 µs - time to settle within ±10% of final output after VCC reaches minimum; critical for fast-cycle control loops. |
Pinout & Package
Package: 3-pin ultramini single-in-line (SIP), suffix UA - through-hole mounting with 2.54 mm pitch, optimized for space-constrained PCB layouts and mechanical robustness in vibration-prone environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Input power supply | 4.5–5.5 V supply rail; requires 0.1 µF bypass capacitor to GND for stable operation and noise immunity. |
| GND | Ground reference | Common return path for supply and output; must be low-impedance to minimize offset drift and EMI coupling. |
| VOUT | Analog output & programming interface | Provides ratiometric voltage proportional to magnetic field; also accepts 14–28 V programming pulses for fuse-based configuration. |
Key Features
| Feature | Design Value |
|---|---|
| End-of-line programmability | Enables final-system calibration without custom ASICs - offset, sensitivity, TCSENS, and polarity set via VOUT pin pulses. |
| Ratiometric output stability | Quiescent voltage, sensitivity, and clamp levels all track VCC - eliminates need for separate voltage references in 5 V systems. |
| Chopper-stabilized architecture | 170 kHz modulation + sample-and-hold suppresses DC offset drift - ensures ±40 mV max quiescent drift over –40°C to 150°C. |
| Output voltage clamps | Low (0.40–0.70 V) and high (4.35–4.65 V) clamps enable hardware-level short-circuit detection without external circuitry. |
| Temperature-cycled recoverability | Retains programmed values and achieves <±2% sensitivity hysteresis after –40°C → 150°C → –40°C thermal cycling. |
Applications
| Throttle Position Sensing | Brake Pedal Position Monitoring |
|---|---|
Use Scenario: Non-contact angular measurement of rotating throttle shaft in gasoline engine management systems. IC Role / Device Role / Timing Role: Linear Hall sensor converting magnetic flux change into analog voltage proportional to shaft angle. Use Value: Delivers ±1.5% linearity error and ±1.5% symmetry error over full stroke, enabling precise fuel-air ratio control without potentiometer wear. |
Use Scenario: Real-time displacement monitoring of brake pedal travel in electronic braking systems (EBS). IC Role / Device Role / Timing Role: Analog-output Hall IC providing continuous voltage feedback correlated to pedal force and position. Use Value: Operates reliably at 150°C ambient and maintains <±40 mV quiescent drift - critical for fail-safe redundancy in ASIL-B designs. |
| Motor Current Sensing | Seat Position Detection |
Use Scenario: Isolated current measurement via magnetic field around motor phase conductor in HVAC blower modules. IC Role / Device Role / Timing Role: High-bandwidth (21 kHz) linear sensor capturing AC/DC current waveform shape and magnitude. Use Value: 20 mVP-P noise floor and ratiometric scaling allow direct ADC interfacing with <0.5% total error at 12-bit resolution. |
Use Scenario: Detection of seat track position using embedded magnet and fixed Hall sensor in automotive power seats. IC Role / Device Role / Timing Role: Programmable offset and sensitivity enable one-part calibration across multiple seat geometries and magnet strengths. Use Value: 6-bit quiescent voltage trim and 6-bit sensitivity adjustment reduce BOM count and eliminate per-unit trimming resistors. |
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 |
|---|---|---|---|
| A1389LUA-T | Successor device with enhanced ESD rating (±8 kV HBM), lower noise (15 mVP-P), and extended sensitivity range (2.5–5.0 mV/G); same UA package and pinout. | Supports higher-precision current sensing and tighter closed-loop control where sub-0.3% field resolution is required. | Select A1389LUA-T for new designs requiring improved noise performance and broader sensitivity tuning. |
| ACS724LLUA-30AU | Integrated current sensor IC (30 A range) with built-in conductor; not programmable; fixed 132 mV/A output; wider supply range (4.5–5.5 V). | Replaces discrete Hall + shunt solutions - eliminates external magnetics but lacks field-level programmability and temperature coefficient tuning. | Choose ACS724LLUA-30AU when measuring conductor current directly and programmability is unnecessary. |
Compared with A1383LUA-T, A1389LUA-T offers measurable improvements in noise and ESD robustness while maintaining full pin and footprint compatibility; ACS724LLUA-30AU trades programmability for integrated current sensing convenience - neither is drop-in, but both serve overlapping automotive position and current roles with distinct trade-offs.
Availability
A1383LUA-T is available at Aetrix Electronics and suitable for automotive throttle control, industrial motor current monitoring, and high-temperature seat position sensing requiring stable component supply despite its discontinued status.
Supply support for A1383LUA-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, specializing in Hall-effect, current-sensing, and motor driver solutions for automotive and industrial markets.
The A138x family was engineered to deliver programmable, temperature-stable linear Hall sensing in miniature packages - targeting cost-sensitive, high-volume applications demanding accuracy without external calibration components.
FAQ
Is A1383LUA-T still in production?
No, A1383LUA-T is a discontinued product. Allegro ceased production as of December 1, 2015. Aetrix Electronics maintains limited legacy inventory for ongoing support of existing designs, but no new manufacturing runs are planned. For new designs, Allegro recommends migrating to A1389LUA-T.
What is the maximum operating temperature for A1383LUA-T?
The A1383LUA-T is rated for continuous operation from –40°C to 150°C (Range L). Its thermal resistance is 165°C/W on a 1-layer PCB, and it maintains specified performance including ±40 mV quiescent output drift and ±3% sensitivity drift across this full range.
How is A1383LUA-T programmed, and what parameters can be adjusted?
A1383LUA-T is programmed via voltage pulses applied to the VOUT pin: 14–16 V for mid-level (VPM) and 26–28 V for high-level (VPH) pulses. Parameters include quiescent voltage output (6-bit), sensitivity (6-bit), sensitivity temperature coefficient (3-bit), polarity (1-bit), and overall lock bit (1-bit).
Does A1383LUA-T require an external bypass capacitor?
Yes, A1383LUA-T requires a 0.1 µF ceramic bypass capacitor between VCC and GND, placed as close as possible to the device pins. This capacitor stabilizes the internal regulator and is mandatory for achieving specified noise, bandwidth, and power-on time performance.
Can A1383LUA-T be used in safety-critical automotive applications?
A1383LUA-T supports ASIL-B–level functional safety requirements through its ratiometric architecture, output clamps for fault detection, and proven thermal stability. While not ISO 26262-certified out-of-box, it has been deployed in production throttle and brake position systems meeting ASIL-B compliance when integrated with appropriate system-level diagnostics.
A1383LUA-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 ~ 150°C
- Grade:
- -
- Qualification:
- -
- Features:
- Programmable, Temperature Compensated
- Supplier Device Package:
- 3-SIP
- Mounting Type:
- Through Hole
A1383LUA-T FAQ
1.How can I place an order for A1383LUA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1383LUA-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 A1383LUA-T reliable?
The price and inventory of A1383LUA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1383LUA-T is usually 5 days.
3.What payment methods are accepted for A1383LUA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1383LUA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1383LUA-T?
A1383LUA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1383LUA-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 A1383LUA-T?
For technical support, including A1383LUA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1383LUA-T requirements.
6.How does Aetrix verify that A1383LUA-T is sourced from the original manufacturer or authorized distributors?
All A1383LUA-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 A1383LUA-T meets industry standards.
7.What is the process for return or replacement of A1383LUA-T?
All A1383LUA-T units undergo pre-shipment inspection (PSI). If there is an issue with A1383LUA-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 A1383LUA-T part is unused and in its original packaging.
Return procedure for A1383LUA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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