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Allegro MicroSystems A1319LLHLX-5-T
- Part No.:
- A1319LLHLX-5-T
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- SOT-23W
- Datasheet:
-
A1319LLHLX-5-T.pdf
- Description:
- SENSOR HALL EFFECT ANALOG SOT23W
- Quantity:
- Payment:
- Shipping:
Inventory:1,249
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Product details
Overview
A1319LLHLX-5-T from Allegro MicroSystems is a linear Hall-effect sensor IC with analog output, designed for high-accuracy angular and displacement sensing in automotive and industrial systems. It delivers 5 mV/G sensitivity, ratiometric 1.65 V quiescent output at 3.3 V supply, and operates across –40°C to 150°C. Its SOT-23W package enables compact placement in motor position feedback and throttle pedal assemblies.
For engineers reviewing the A1319LLHLX-5-T datasheet, A1319LLHLX-5-T pinout, A1319LLHLX-5-T application, or A1319LLHLX-5-T equivalent, key selection criteria include its ±1.5% linearity error, 20 kHz bandwidth, 400 kHz chopping frequency, and UVLO thresholds (2.5 V turn-off / 3 V turn-on) - all validated for extended-temperature automotive use.
Technical Context
The A1319LLHLX-5-T integrates a BiCMOS monolithic circuit featuring a Hall element, dynamic offset cancellation, temperature-compensated sensitivity and QVO programming, and a tuned low-pass filter. Its high-speed chopping scheme operates at 400 kHz to suppress thermal and mechanical stress-induced drift.
It implements ratiometric operation: output voltage, sensitivity, and clamp levels scale linearly with VCC. The device includes output voltage clamps (0.264–0.462 V low / 2.842–3.069 V high), undervoltage lockout, and short-circuit diagnostic capability via clamping behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Sensitivity | 4.85–5.15 mV/G - enables precise magnetic field resolution down to ~0.2 G per LSB in 12-bit ADC systems |
| Quiescent Output (QVO) | 1.635–1.665 V at 3.3 V supply - centered at 50% VCC for symmetric positive/negative field response |
| Operating Temperature | –40°C to +150°C - qualified for under-hood automotive and industrial motor control environments |
| Supply Voltage | 3.0–3.63 V - optimized for 3.3 V systems with 2.5 V UVLO shutdown threshold |
| Bandwidth | 20 kHz - supports real-time position tracking in BLDC motor commutation up to 120 kRPM |
| Output Noise | 13 mVp-p - low-noise analog output suitable for direct connection to precision ADCs without external filtering |
| Sensitivity TC | 0.08–0.16 %/°C - factory-programmed coefficient ensures stable gain across full temperature range |
Pinout & Package
Package: 3-pin SOT-23W (2.0 mm × 3.0 mm × 1.0 mm), surface-mount, lead-free with 100% matte-tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power input | 3.0–3.63 V supply rail; requires 0.1 µF bypass capacitor to GND for noise suppression and UVLO stability |
| VOUT | Analog output | Ratiometric voltage output (0.26–3.07 V clamped); low-impedance (<1 Ω) stage drives ≥4.7 kΩ loads |
| GND | Ground reference | Return path for supply and output; must be low-impedance to minimize offset drift and EMI susceptibility |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic offset cancellation | Chopping at 400 kHz eliminates thermal hysteresis and mechanical stress drift, enabling ±20 mV QVO drift over –40°C to 150°C |
| Factory-programmed TC | Sensitivity and QVO temperature coefficients programmed at end-of-line for <±1.5% total error across temperature |
| Ratiometric clamping | Output clamps scale with VCC - preserves fault detection margin across supply variations in noisy automotive environments |
| Undervoltage lockout | Hysteresis between 2.5 V (shutdown) and 3.0 V (enable) prevents erratic output during brown-out conditions |
| Short-circuit diagnostics | Clamp-limited output provides observable voltage boundaries (0.26–3.07 V) for open/short load detection without extra circuitry |
Applications
| Automotive Throttle Position Sensing | Industrial Motor Commutation |
|---|---|
|
Use Scenario: Detecting angular rotation of accelerator pedal shaft in ISO 26262-compliant powertrain systems. IC Role / Device Role / Timing Role: Linear Hall-effect sensor providing analog voltage proportional to magnet angle; replaces potentiometers with higher reliability and EMC immunity. Use Value: ±1.5% linearity and <±20 mV QVO drift ensure ASIL-B compliant position accuracy across –40°C to 150°C without calibration. |
Use Scenario: Rotor position feedback in 3-phase BLDC motors used in HVAC blowers and industrial pumps. IC Role / Device Role / Timing Role: Analog magnetic field transducer feeding ADC input for real-time commutation timing; synchronized to PWM carrier. Use Value: 20 kHz bandwidth and 50 µs power-on time enable fast startup and accurate phase alignment at >10 kRPM. |
| Electric Power Steering Torque Sensing | Rotary Knob Interface |
|
Use Scenario: Measuring torsion bar deflection in column-assist EPS modules where space and thermal stability are critical. IC Role / Device Role / Timing Role: High-precision linear sensor capturing differential magnetic field for torque calculation; integrated into dual-die redundancy schemes. Use Value: Immunity to mechanical stress and precise recoverability after temperature cycling ensure consistent torque signal integrity over vehicle lifetime. |
Use Scenario: Contactless angular position detection in premium appliance control knobs and medical device dials. IC Role / Device Role / Timing Role: Low-power analog sensor interfaced to microcontroller ADC; operates continuously in battery-powered modes. Use Value: 7.7 mA supply current and 3.3 V operation enable >5-year battery life in sealed rotary encoders with no moving contacts. |
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 |
|---|---|---|---|
| A1315LUA-5-T | Same 5 mV/G sensitivity and –40°C to 150°C rating, but uses ultramini SIP package (1.5 × 4 × 3 mm) instead of SOT-23W; no UVLO hysteresis spec provided | Preferred for through-hole assembly or where board-level mechanical robustness outweighs footprint size | Select when SIP mounting is required and UVLO hysteresis tolerance is not critical to system safety logic |
| ACS724LLCTR-5AB-T | Current sensor (not field sensor); 5 A range, 185 mV/A output; different measurement domain and PCB layout requirements | Used for motor phase current monitoring-not position or angle sensing-requiring separate shunt or conductor routing | Choose only for current-sensing applications; not a functional substitute for magnetic field position detection |
Compared with A1319LLHLX-5-T, the A1315LUA-5-T offers identical sensitivity and temperature range in a larger through-hole package, while the ACS724LLCTR-5AB-T serves a fundamentally different current-sensing function - neither provides drop-in replacement capability for angular position sensing.
Availability
A1319LLHLX-5-T is available at Aetrix Electronics and suitable for automotive throttle position sensing, industrial BLDC motor commutation, electric power steering torque sensing, and rotary knob interfaces requiring stable component supply despite its Not for New Design status.
Supply support for A1319LLHLX-5-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 magnetic sensing, power ICs, and motor driver solutions for automotive and industrial markets.
The A1319LLHLX-5-T belongs to Allegro's linear Hall-effect sensor family, engineered for high-accuracy, extended-temperature position and displacement sensing in safety-critical automotive subsystems.
FAQ
What is the operating supply voltage range for the A1319LLHLX-5-T?
The A1319LLHLX-5-T operates from 3.0 V to 3.63 V, with undervoltage lockout activating below 2.5 V (turn-off) and re-enabling above 3.0 V (turn-on). This 0.5 V hysteresis prevents oscillation during supply transients. The device is optimized for 3.3 V systems and draws 7.7 mA typical supply current at that voltage. Operation outside this range may cause output instability or permanent damage.
Is the A1319LLHLX-5-T pin-compatible with other A131x variants in the SOT-23W package?
Yes, the A1319LLHLX-5-T shares identical pinout (VCC–VOUT–GND), footprint, and thermal characteristics with A1318LLHLX-1-T and A1318LLHLX-2-T in the LH (SOT-23W) package. However, sensitivity differs (5 mV/G vs. 1.35/2.5 mV/G), so circuit gain and ADC scaling must be adjusted. No PCB redesign is needed for substitution within the same package family.
What does "Not for New Design" mean for the A1319LLHLX-5-T?
"Not for New Design" indicates Allegro has discontinued active development and sampling of the A1319LLHLX-5-T. It remains available for existing customer programs already using the part, but new designs should transition to recommended alternatives like the A1315 series. Aetrix Electronics maintains inventory and supports legacy production runs with full traceability and lifecycle coordination.
How does the A1319LLHLX-5-T achieve stable output across temperature?
The A1319LLHLX-5-T achieves thermal stability through factory-programmed temperature coefficients for both sensitivity (0.08–0.16 %/°C) and quiescent output (QVO), plus dynamic offset cancellation via 400 kHz chopping. These features reduce QVO drift to ±20 mV and maintain ±1.5% linearity across –40°C to 150°C - verified by end-of-line characterization at 150°C and 25°C reference points.
Can the A1319LLHLX-5-T be used in safety-critical automotive applications?
Yes, the A1319LLHLX-5-T is qualified for automotive use with AEC-Q100 Grade 0 (–40°C to +150°C) operation, enhanced EMC performance, and built-in diagnostics including output clamping and UVLO. While it is not ASIL-certified as a standalone component, it is widely deployed in ASIL-B throttle and EPS subsystems when implemented with appropriate system-level redundancy and monitoring - as confirmed in Allegro's application notes for powertrain sensing.
A1319LLHLX-5-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- SOT-23W
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Technology:
- Hall Effect
- Axis:
- Single
- Output Type:
- Analog Voltage
- Sensing Range:
- -
- Voltage - Supply:
- 3V ~ 3.63V
- Current - Supply (Max):
- 10mA
- Current - Output (Max):
- 10mA
- Resolution:
- -
- Bandwidth:
- 20kHz
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Features:
- Temperature Compensated
- Supplier Device Package:
- SOT-23W
- Mounting Type:
- Surface Mount
A1319LLHLX-5-T FAQ
1.How can I place an order for A1319LLHLX-5-T through Aetrix?
Please submit a Request for Quotation (RFQ) for A1319LLHLX-5-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 A1319LLHLX-5-T reliable?
The price and inventory of A1319LLHLX-5-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A1319LLHLX-5-T is usually 5 days.
3.What payment methods are accepted for A1319LLHLX-5-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A1319LLHLX-5-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A1319LLHLX-5-T?
A1319LLHLX-5-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A1319LLHLX-5-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 A1319LLHLX-5-T?
For technical support, including A1319LLHLX-5-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A1319LLHLX-5-T requirements.
6.How does Aetrix verify that A1319LLHLX-5-T is sourced from the original manufacturer or authorized distributors?
All A1319LLHLX-5-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 A1319LLHLX-5-T meets industry standards.
7.What is the process for return or replacement of A1319LLHLX-5-T?
All A1319LLHLX-5-T units undergo pre-shipment inspection (PSI). If there is an issue with A1319LLHLX-5-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 A1319LLHLX-5-T part is unused and in its original packaging.
Return procedure for A1319LLHLX-5-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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