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Allegro MicroSystems ALS31001LUAATN-5V
- Part No.:
- ALS31001LUAATN-5V
- Manufacturer:
- Allegro MicroSystems
- Category:
- Linear, Compass (ICs)
- Package:
- 3-SSIP
- Datasheet:
-
ALS31001LUAATN-5V.pdf
- Description:
- LINEAR HALL-EFFECT SENSOR IC WIT
- Quantity:
- Payment:
- Shipping:
Inventory:3,279
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Product details
Overview
ALS31001LUAATN-5V from Allegro MicroSystems is a ratiometric linear Hall-effect sensor IC with analog voltage output, designed for high-accuracy displacement and angular position sensing in automotive and industrial systems. It operates from a 5.0 V supply (4.5–5.5 V), delivers 2.5 mV/G typical sensitivity, maintains quiescent output at 2.4 V (50% of VCC), and functions across –40°C to 150°C ambient temperature.
For engineers reviewing the ALS31001LUAATN-5V datasheet, ALS31001LUAATN-5V pinout, ALS31001LUAATN-5V application, or ALS31001LUAATN-5V equivalent, this page provides verified technical context, validated pin functionality, real-world application mappings, and confirmed alternative options for high-temperature linear magnetic sensing.
Technical Context
The ALS31001LUAATN-5V integrates a BiCMOS monolithic circuit featuring a Hall element, dynamic offset cancellation, temperature-compensated amplifier, and clamped low-impedance output stage. Its proprietary chopping scheme operates at 400 kHz to suppress thermal and mechanical drift, enabling stable QVO and sensitivity over temperature.
End-of-line programming sets device-specific temperature coefficients for both sensitivity (0.10–0.16 %/°C) and quiescent voltage output, ensuring sustained accuracy across –40°C to 150°C. The ratiometric architecture ties VOUT(Q), Sens, and clamp voltages directly to VCC, delivering ±1.5% ratiometry error across supply variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5–5.5 V - supports robust 5 V rail operation with undervoltage lockout (UVLO) thresholds at 2.5 V (off) and 3 V (on) |
| Sensitivity | 2.42–2.58 mV/G - enables precise field-to-voltage conversion for sub-millimeter position resolution |
| Quiescent Output (QVO) | 2.368–2.432 V - centered at 50% of 5 V supply, minimizing headroom constraints in analog signal chains |
| Output Clamps | VCLPHIGH = 4.30–4.70 V / VCLPLOW = 0.35–0.75 V - provide short-circuit diagnostics and define linear magnetic range |
| Bandwidth | 20 kHz (–3 dB) - supports fast-response applications including motor commutation and valve control |
| Operating Temperature | –40°C to 150°C - qualified for under-hood automotive and high-temp industrial environments |
| Chopping Frequency | 400 kHz - actively cancels offset drift while maintaining low-noise analog output (4.9 mVp-p) |
Pinout & Package
ALS31001LUAATN-5V uses the UA package: a 3-pin ultramini single-inline through-hole package (1.5 mm × 4 mm × 3 mm), lead-free with 100% matte-tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power input | 5 V supply pin requiring 0.1 µF bypass capacitor to GND; includes UVLO and internal Zener clamp (6–7.3 V) |
| GND | Reference ground | Low-impedance return path for supply and output; essential for noise immunity and accurate ratiometric scaling |
| VOUT | Analog output | Ratiometric voltage output (2.4 V QVO) with clamped high/low limits; drives ≥10 kΩ load with ≤0.22 nF capacitance |
Key Features
| Feature | Design Value |
|---|---|
| End-of-line programmed TC | Temperature coefficients for sensitivity and QVO are individually calibrated at Allegro test, ensuring part-specific stability across –40°C to 150°C |
| Dynamic offset cancellation | 400 kHz chopper stabilization eliminates thermal/mechanical drift, achieving ±23 mV QVO drift over full temperature range |
| Ratiometric output architecture | VOUT(Q), Sens, and clamp voltages scale with VCC, enabling supply tolerance without recalibration (±1.5% ratiometry error) |
| Short-circuit diagnostic clamps | Output voltage limits (0.35–0.75 V low / 4.30–4.70 V high) indicate wiring faults or load failures without external circuitry |
| High EMC immunity | Proprietary layout and filtering meet stringent automotive EMC requirements, reducing susceptibility to radiated and conducted noise |
Applications
| Automotive Throttle Position Sensing | Industrial Linear Actuator Feedback |
|---|---|
Use Scenario: Monitoring throttle plate angle in gasoline direct injection engines under hood temperatures up to 150°C. IC Role / Device Role / Timing Role: Analog linear Hall sensor providing continuous voltage output proportional to magnetic field from rotating ferrous target. Use Value: 2.5 mV/G sensitivity and ±1.5% linearity error enable <1° angular resolution; ratiometric output eliminates need for separate reference voltage. |
Use Scenario: Closed-loop position control of hydraulic cylinder rods in factory automation equipment exposed to vibration and thermal cycling. IC Role / Device Role / Timing Role: Displacement transducer converting rod travel into analog voltage via magnet-on-rod configuration. Use Value: Immunity to mechanical stress and precise recoverability after temperature cycling ensure repeatable zero-point accuracy across maintenance cycles. |
| Electric Power Steering Torque Sensing | Motor Commutation Feedback |
Use Scenario: Measuring torsion bar twist in EPS column assemblies where space is constrained and EMI is severe. IC Role / Device Role / Timing Role: High-bandwidth (20 kHz) linear sensor detecting differential magnetic fields from dual magnets on input/output shafts. Use Value: 400 kHz chopping and enhanced EMC performance suppress noise-induced torque errors; ultramini SIP fits tight PCB layouts. |
Use Scenario: Providing analog field strength feedback for sinusoidal commutation in BLDC motors used in HVAC blowers and pumps. IC Role / Device Role / Timing Role: Analog Hall sensor supplying continuous rotor position information to motor controller ADC inputs. Use Value: Low-output impedance (3 Ω) and fast power-on time (50 µs) support high-speed motor control loops without signal conditioning. |
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 |
|---|---|---|---|
| Melexis MLX90393-HEB-075-SP | 3-axis I²C digital output; 2.7–5.5 V supply; 16-bit resolution; no analog ratiometric output | Requires microcontroller interface and calibration; suited for multi-axis or programmable gain needs | Select when digital communication, multi-axis data, or field-programmable settings are required instead of direct analog interfacing. |
| Allegro A1324LLHLT-T | Single-axis analog output; 3.0–5.5 V supply; 5.0 mV/G sensitivity; –40°C to 150°C; no end-of-line TC programming | Lacks per-part temperature coefficient optimization; higher QVO drift (±50 mV) over temperature | Choose for cost-sensitive designs where moderate accuracy suffices and end-of-line calibration infrastructure is unavailable. |
Compared with ALS31001LUAATN-5V, MLX90393 offers digital flexibility but adds system complexity, while A1324LLHLT-T reduces cost but sacrifices QVO stability and sensitivity accuracy-making ALS31001LUAATN-5V optimal for high-reliability analog position feedback where drift minimization is critical.
Availability
ALS31001LUAATN-5V is available at Aetrix Electronics and suitable for automotive throttle position sensing, industrial linear actuator feedback, electric power steering torque sensing, and motor commutation feedback requiring stable component supply across extended temperature ranges.
Supply support for ALS31001LUAATN-5V 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, with design centers in North America, Europe, and Asia.
The ALS31001LUAA product line targets high-accuracy linear position and displacement sensing in harsh environments, emphasizing end-of-line calibration, thermal stability, and compact through-hole packaging for automotive and industrial motion control.
FAQ
What is the operating supply voltage range for ALS31001LUAATN-5V?
The ALS31001LUAATN-5V operates from 4.5 V to 5.5 V nominal supply voltage. It incorporates undervoltage lockout (UVLO) with turn-on threshold at 3 V and turn-off threshold at 2.5 V, ensuring clean output enable/disable behavior during power ramping. This range supports standard 5 V systems while tolerating rail droop in automotive and industrial environments.
How does ALS31001LUAATN-5V achieve stable quiescent voltage output across temperature?
The ALS31001LUAATN-5V achieves stable quiescent voltage output (QVO) by combining end-of-line programming of QVO temperature coefficient with dynamic offset cancellation. Each ALS31001LUAATN-5V unit is individually calibrated at Allegro's test facility to set its QVO TC, resulting in only ±23 mV total QVO drift from –40°C to 150°C - significantly tighter than non-programmed alternatives.
What is the function of the output voltage clamps in ALS31001LUAATN-5V?
The output voltage clamps in ALS31001LUAATN-5V serve dual purposes: they define the linear magnetic field range (via VCLPHIGH = 4.30–4.70 V and VCLPLOW = 0.35–0.75 V at 5 V supply), and provide short-circuit diagnostics. If VOUT is forced outside these bounds - e.g., by wiring fault or load failure - the clamps activate, allowing detection without additional circuitry.
Can ALS31001LUAATN-5V be used with a 3.3 V supply?
No - ALS31001LUAATN-5V is specifically configured for 5.0 V operation and is not rated for 3.3 V supply. The "-5V" suffix denotes its nominal 5 V supply variant, with electrical characteristics (e.g., sensitivity = 2.5 mV/G, QVO = 2.4 V) and UVLO thresholds optimized for that rail. For 3.3 V operation, use the pin-compatible ALS31001LUAATN variant.
What package type does ALS31001LUAATN-5V use, and what are its key mechanical dimensions?
ALS31001LUAATN-5V uses the UA package: a 3-pin ultramini single-inline through-hole package measuring 1.5 mm (width) × 4 mm (length) × 3 mm (height). It features lead-free construction with 100% matte-tin leadframe plating and is designed for manual or wave soldering in space-constrained automotive and industrial PCBs.
ALS31001LUAATN-5V Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Package/Case:
- 3-SSIP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Hall Effect
- Axis:
- -
- Output Type:
- Analog Voltage
- Sensing Range:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Current - Supply (Max):
- 8mA
- Current - Output (Max):
- 2mA
- Resolution:
- -
- Bandwidth:
- 20kHz
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Supplier Device Package:
- 3-SIP
- Mounting Type:
- Through Hole
ALS31001LUAATN-5V FAQ
1.How can I place an order for ALS31001LUAATN-5V through Aetrix?
Please submit a Request for Quotation (RFQ) for ALS31001LUAATN-5V 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 ALS31001LUAATN-5V reliable?
The price and inventory of ALS31001LUAATN-5V are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ALS31001LUAATN-5V is usually 5 days.
3.What payment methods are accepted for ALS31001LUAATN-5V?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ALS31001LUAATN-5V transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ALS31001LUAATN-5V?
ALS31001LUAATN-5V orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ALS31001LUAATN-5V 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 ALS31001LUAATN-5V?
For technical support, including ALS31001LUAATN-5V datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ALS31001LUAATN-5V requirements.
6.How does Aetrix verify that ALS31001LUAATN-5V is sourced from the original manufacturer or authorized distributors?
All ALS31001LUAATN-5V 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 ALS31001LUAATN-5V meets industry standards.
7.What is the process for return or replacement of ALS31001LUAATN-5V?
All ALS31001LUAATN-5V units undergo pre-shipment inspection (PSI). If there is an issue with ALS31001LUAATN-5V, 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 ALS31001LUAATN-5V part is unused and in its original packaging.
Return procedure for ALS31001LUAATN-5V:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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