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Allegro MicroSystems A19250LUBATN-A
- Part No.:
- A19250LUBATN-A
- Manufacturer:
- Allegro MicroSystems
- Category:
- Angle, Linear Position Measuring
- Package:
- 2-SIP Module
- Datasheet:
-
A19250LUBATN-A.pdf
- Description:
- HIGH ACCURACY, GMR WHEEL SPEED S
- Quantity:
- Payment:
- Shipping:
Inventory:1,080
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Product details
Overview
A19250LUBATN-A from Allegro MicroSystems is a high-accuracy, ASIL B-compliant giant magnetoresistance (GMR) wheel speed sensor IC with two-wire current-source output, integrated 2.2 nF ceramic capacitor, and solid-state digital architecture for edge accuracy up to 5000 Hz in automotive ABS and ESC systems.
For engineers reviewing the A19250LUBATN-A datasheet, A19250LUBATN-A pinout, A19250LUBATN-A application, or A19250LUBATN-A equivalent, this page delivers verified specifications, functional context for front-biased ring magnet targets, ASIL B diagnostic coverage, thermal derating guidance, and real-world substitution options aligned with ISO 26262 safety integration requirements.
Technical Context
The A19250LUBATN-A implements differential GMR sensing with 1.75 mm element spacing to reject common-mode magnetic interference and deliver ≤0.3% repeatability jitter across –40°C to +150°C ambient. Its SolidSpeed Digital Architecture dynamically adjusts thresholds based on detected magnetic peaks and supports dual-direction rotation detection via pulse-rate encoding.
This variant integrates EEPROM for production traceability and enables ASIL B-compliant safe-state output protocols-Error Protocol 1 (145–215 μs reset) for over-frequency faults and Error Protocol 2 (4–7.5 ms reset) for regulator or front-end hard failures-without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.25 V to 24 V - Enables direct connection to automotive battery rails with undervoltage lockout at 3.75 V turn-on / 3.5 V turn-off. |
| Operating Frequency | 0–5000 Hz - Supports wheel speeds up to ~250 km/h with 48-pole ring magnets at standard air gaps. |
| Differential Magnetic Input | 2.5 G pk-pk minimum - Detects low-amplitude signals from small or distant ring magnets while rejecting >80 G |Bx| field interference. |
| Output Current States | ICC(LOW) = 5.9–8.4 mA / ICC(HIGH) = 12–16 mA - Provides robust two-wire signaling with 1.9× current ratio for noise-immune edge detection. |
| Thermal Resistance | RθJA = 213 °C/W - Requires thermal-aware PCB layout on single-layer boards; junction temperature must stay ≤165 °C under worst-case 150 °C ambient. |
| ASIL Compliance | ASIL B SEooC per ISO 26262 - Validated hardware safety element when used per safety manual; diagnostics cover regulator, front-end, and oscillator faults. |
| Integrated Capacitor | 2.2 nF between pins 1–2 - Eliminates external decoupling, improves EMC robustness, and stabilizes supply during transients in harsh automotive environments. |
Pinout & Package
The A19250LUBATN-A is housed in a lead-free, overmolded 2-pin SIP (Single In-line Package) designated UB, featuring molded lead-stabilizing bar for mechanical robustness and tin-plated leadframe. Dimensions: 18.00 ±0.10 mm length × 4.00 ±0.06 mm width × 1.80 ±0.10 mm height, with active area depth of 0.38 ±0.03 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply Voltage Input | Pin 1 accepts 4.25–24 V DC; internal zener clamp limits to 28 V; powers all internal blocks including diagnostics and EEPROM. |
| GND | Ground Reference | Pin 2 serves as return path for supply current and output current; forms low-inductance loop with integrated 2.2 nF capacitor for EMC stability. |
Key Features
| Feature | Design Value |
|---|---|
| GMR Differential Sensing | 1.75 mm spaced elements reject common-mode fields and enable <0.3% repeatability jitter at full temperature range. |
| Drop-in Hall Replacement | Same physical orientation as Hall sensors-no retooling required when upgrading from legacy Hall-based wheel speed modules. |
| ASIL B Safe-State Protocols | Two distinct error protocols (EP1/EP2) provide time-bound, fault-specific current-output responses compatible with ECU-level safety monitoring. |
| Integrated Traceability | On-chip EEPROM stores device-specific manufacturing data for full production-line traceability without external memory. |
| Robust Packaging | Overmolded SIP with molded lead bar prevents shipping damage and ensures consistent assembly alignment in automated insertion lines. |
Applications
| ABS Wheel Speed Sensing | ESC Vehicle Dynamics Monitoring |
|---|---|
Use Scenario: Mounted adjacent to brake rotor or hub carrier to monitor rotational speed of each wheel in real time. IC Role / Device Role / Timing Role: GMR-based magnetic encoder interface providing precise zero-crossing timing for slip detection and brake pressure modulation. Use Value: Delivers ≤0.3% edge repeatability under vibration, temperature cycling, and EMI-critical for accurate slip calculation in anti-lock braking. |
Use Scenario: Installed on steering knuckle or suspension upright to feed real-time wheel speed data into electronic stability control ECUs. IC Role / Device Role / Timing Role: Two-wire current-source sensor generating synchronized pulse trains for yaw rate and lateral acceleration correlation. Use Value: 5000 Hz bandwidth supports high-speed maneuvers; ASIL B diagnostics ensure fault detection before loss of control occurs. |
| Traction Control System (TCS) | Electric Power Steering (EPS) Feedback |
Use Scenario: Paired with differential ring magnets on drive axles to detect wheel spin during acceleration on low-friction surfaces. IC Role / Device Role / Timing Role: Front-biased GMR detector delivering direction-agnostic pulse output for torque vectoring algorithms. Use Value: Differential sensing rejects stray fields from nearby motors or solenoids, enabling reliable operation in electric drivetrains. |
Use Scenario: Integrated into EPS motor housing to monitor motor shaft rotation for closed-loop position/speed feedback. IC Role / Device Role / Timing Role: High-accuracy magnetic speed sensor feeding resolverless commutation logic in brushless EPS motors. Use Value: 2.5 G pk-pk sensitivity allows use with compact ring magnets; integrated capacitor eliminates layout-sensitive decoupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar GMR wheel speed sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| A19350LUBATN-A | Higher operating frequency (0–7500 Hz); enhanced ASIL B diagnostic coverage including EEPROM CRC check. | Required for next-gen ADAS platforms needing extended speed range and deeper fault coverage. | Select when system-level FMEDA requires >90% single-point fault metric or supports >300 km/h vehicle speeds. |
| ATS6858LSGTN-T | Programmable output protocol (PWM or current); no integrated capacitor; separate decoupling required. | Suitable for cost-sensitive Tier-2 modules where board space permits external 2.2 nF placement. | Choose only if existing layout accommodates discrete capacitor and firmware supports protocol configuration. |
Compared with A19250LUBATN-A, A19350LUBATN-A offers higher bandwidth and expanded diagnostics but requires updated safety manual integration, while ATS6858LSGTN-T trades integrated EMC robustness for configurability-neither is pin-compatible, and both demand validation against target magnet geometry and air gap.
Availability
A19250LUBATN-A is available at Aetrix Electronics and suitable for automotive ABS, ESC, and TCS systems requiring stable component supply, ASIL B compliance, and high-temperature operation up to +150°C ambient.
Supply support for A19250LUBATN-A 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 and manufacturer of high-performance magnetic sensing and power ICs, headquartered in Manchester, NH, serving automotive, industrial, and consumer markets since 1989.
The A19250LUBATN-A belongs to Allegro's ASIL-certified GMR wheel speed sensor product line, engineered specifically for functional safety-critical automotive motion sensing where precision, reliability, and electromagnetic resilience are non-negotiable.
FAQ
What is the primary function of the A19250LUBATN-A in automotive systems?
The A19250LUBATN-A functions as a high-accuracy, two-wire GMR wheel speed sensor IC that detects rotational speed and direction using differential magnetic field sensing. It outputs a current-based signal proportional to target pole-pair passage, enabling real-time wheel speed measurement for ABS, ESC, and traction control systems. Its design ensures stable operation from –40°C to +150°C ambient with built-in diagnostics and ASIL B compliance.
Does the A19250LUBATN-A require external decoupling capacitors?
No, the A19250LUBATN-A integrates a 2.2 nF high-temperature ceramic capacitor internally between pins 1 (VCC) and 2 (GND). This eliminates the need for external decoupling components, reduces PCB footprint, and enhances EMC robustness in noisy automotive environments. The capacitor is qualified for operation across the full –40°C to +150°C temperature range.
How does the A19250LUBATN-A support ASIL B compliance?
The A19250LUBATN-A is developed as an ASIL B hardware safety element out-of-context per ISO 26262. It includes continuous internal diagnostics for regulator, front-end, oscillator, and EEPROM faults, triggering defined safe-state output protocols (Error Protocol 1 or 2) upon detection. Full compliance requires integration per the A19250 Safety Manual, including correct ECU-level fault response and system-level FMEDA validation.
What magnetic target configurations are compatible with the A19250LUBATN-A?
The A19250LUBATN-A is designed for use with front-biased radial ring magnets having alternating north-south pole pairs. It requires a differential magnetic input of ≥2.5 G pk-pk and supports target pitches down to 1.48 mm (per datasheet Figure 10). The sensor operates optimally with air gaps of 0.8–1.5 mm and rejects |Bx| fields up to 80 G, making it suitable for compact, high-vibration mounting positions near brake calipers or hubs.
Is the A19250LUBATN-A pin-compatible with Hall-effect wheel speed sensors?
Yes-the A19250LUBATN-A uses the same physical orientation and mounting footprint as legacy Hall-effect sensors, enabling drop-in replacement without mechanical retooling. Its 2-pin SIP UB package aligns with standard Hall sensor footprints, and its differential GMR architecture provides superior noise immunity and lower jitter than Hall alternatives while maintaining identical mechanical interface requirements.
A19250LUBATN-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Package/Case:
- 2-SIP Module
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Last Time Buy
- Programmable:
- -
- For Measuring:
- -
- Technology:
- Hall Effect
- Rotation Angle - Electrical, Mechanical:
- -
- Linear Range:
- -
- Output:
- Analog Voltage
- Output Signal:
- -
- Actuator Type:
- External Magnet, Not Included
- Linearity:
- -
- Resistance:
- -
- Resistance Tolerance:
- -
- Voltage - Supply:
- 4.25V ~ 24V
- Mounting Type:
- Through Hole
- Termination Style:
- PC Pin
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 2-UltraMini SIP
A19250LUBATN-A FAQ
1.How can I place an order for A19250LUBATN-A through Aetrix?
Please submit a Request for Quotation (RFQ) for A19250LUBATN-A 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 A19250LUBATN-A reliable?
The price and inventory of A19250LUBATN-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A19250LUBATN-A is usually 5 days.
3.What payment methods are accepted for A19250LUBATN-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A19250LUBATN-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A19250LUBATN-A?
A19250LUBATN-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A19250LUBATN-A 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 A19250LUBATN-A?
For technical support, including A19250LUBATN-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A19250LUBATN-A requirements.
6.How does Aetrix verify that A19250LUBATN-A is sourced from the original manufacturer or authorized distributors?
All A19250LUBATN-A 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 A19250LUBATN-A meets industry standards.
7.What is the process for return or replacement of A19250LUBATN-A?
All A19250LUBATN-A units undergo pre-shipment inspection (PSI). If there is an issue with A19250LUBATN-A, 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 A19250LUBATN-A part is unused and in its original packaging.
Return procedure for A19250LUBATN-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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