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Allegro MicroSystems A19302PUBATN-FAE-A
- Part No.:
- A19302PUBATN-FAE-A
- Manufacturer:
- Allegro MicroSystems
- Category:
- Angle, Linear Position Measuring
- Package:
- 2-SIP Module
- Datasheet:
-
A19302PUBATN-FAE-A.pdf
- Description:
- 2-WIRE ABS DIRECTION AND SPEED S
- Quantity:
- Payment:
- Shipping:
Inventory:1,430
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Product details
Overview
A19302PUBATN-FAE-A from Allegro MicroSystems is a Hall-effect wheel speed and direction sensor IC with integrated EEPROM, ASIL B safety compliance (SEooC), and dual PW/AK two-wire protocol support. It delivers high-accuracy rotational speed and direction detection for automotive wheel speed sensing in harsh environments, featuring SolidSpeed Digital Architecture, on-chip 2.2 nF capacitor, and robust 2-pin SIP UB package.
For engineers reviewing the A19302PUBATN-FAE-A datasheet, A19302PUBATN-FAE-A pinout, A19302PUBATN-FAE-A application, or A19302PUBATN-FAE-A equivalent, this page provides verified technical context, real-world design meaning of key specs, functional pin definitions, automotive safety integration guidance, and validated alternative options for wheel speed sensing systems requiring ISO 26262-compliant signal integrity.
Technical Context
The A19302PUBATN-FAE-A implements a three-element Hall differential architecture with dynamic threshold adaptation, enabling precise edge detection and direction resolution from ring magnet or ferromagnetic targets. Its SolidSpeed Digital Architecture executes real-time signal optimization and air gap compensation algorithms to maintain pitch accuracy during dynamic air gap disturbances up to ±24 Gpk-pk.
This variant uses the PW protocol with forward/reverse pulse width encoding (tW(FWD) = 90 µs typ., tW(REV) = 180 µs typ.), ASIL fault signaling enabled (tW(FAULT) = 5 ms), and operates across –40°C to +160°C ambient. It features EEPROM-based device traceability and integrates a 2.2 nF ceramic capacitor between pins 1 and 2 for enhanced EMC robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4–24 V (supports wide automotive battery range; UVLO hysteresis ensures clean startup) |
| Operating Temperature | –40°C to +160°C ambient (enables direct mounting near wheel hubs without external thermal shielding) |
| Output Protocol | PW protocol with forward/reverse pulse width encoding (no data bus required; 2-wire analog current output) |
| Differential Magnetic Input | ±700 G operating range, 20 Gpk-pk minimum detectable (supports small air gaps and low-field magnets) |
| ASIL Compliance | Hardware safety element out-of-context (SEooC) with ASIL B capability per ISO 26262 (requires safety manual integration) |
| Integrated Capacitor | 2.2 nF ceramic capacitor co-molded in package (eliminates external decoupling, improves EMC immunity) |
| Junction Temp Limit | 175°C max (allows operation under sustained brake heat exposure when mounted near calipers) |
Pinout & Package
The A19302PUBATN-FAE-A is housed in a lead-free, tin-plated 2-pin SIP (Single In-line Package) designated UB, measuring 18.00 mm × 4.00 mm × 1.80 mm, with molded lead-stabilizing bar for mechanical robustness during shipping and SMT assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Supply Voltage | Pin 1: connects to battery rail (4–24 V); powers internal regulator, EEPROM, and Hall front-end |
| GND | Ground | Pin 2: return path for supply and output current; forms 2-wire loop with VCC for current-mode signaling |
Key Features
| Feature | Design Value |
|---|---|
| SolidSpeed Digital Architecture | Real-time magnetic signal compensation maintains <±0.5% speed error under dynamic air gap variation up to ±24 Gpk-pk |
| Integrated 2.2 nF Capacitor | Eliminates need for external decoupling capacitor, reducing PCB footprint and improving ESD/EMC resilience |
| ASIL B SEooC Certification | Enables use in ASIL B safety goals (e.g., ABS, ESC) when integrated per safety manual-no additional hardware redundancy needed |
| EEPROM Traceability | Stores unique device ID and calibration data across full product lifecycle for traceability in Tier 1 production audits |
| PW Protocol with Direction Encoding | Forward pulse width (90 µs typ.) and reverse pulse width (180 µs typ.) enable unambiguous direction detection without external logic |
Applications
| Anti-lock Braking System (ABS) | Electronic Stability Control (ESC) |
|---|---|
Use Scenario: Mounted on wheel hub to monitor rotational speed and direction of each wheel during emergency braking on low-friction surfaces. IC Role / Device Role / Timing Role: Primary wheel speed sensor providing real-time direction-aware pulse train to ABS ECU via 2-wire current loop. Use Value: Enables accurate wheel lock detection and individual wheel torque modulation by resolving direction reversals during skid recovery. | Use Scenario: Integrated into vehicle dynamics control module to detect yaw rate discrepancies caused by lateral slip during cornering. IC Role / Device Role / Timing Role: High-fidelity directional speed input used to calculate individual wheel slip ratios and correct vehicle trajectory. Use Value: Supports sub-100 µs timing resolution for rapid intervention-critical for maintaining stability at >100 km/h on wet pavement. |
| Adaptive Cruise Control (ACC) | Electric Power Steering (EPS) Feedback |
Use Scenario: Installed on transmission output shaft or driven axle to provide vehicle speed and direction feedback for longitudinal motion control. IC Role / Device Role / Timing Role: Secondary speed reference augmenting radar-based ACC logic to improve low-speed stop-and-go accuracy. Use Value: Delivers stable 0–2.5 kHz output (fSIG) with <1.5 TCYCLE calibration time-enabling reliable standstill detection and restart synchronization. | Use Scenario: Used on steering column or rack-mounted gear to sense motor rotation direction and speed for closed-loop torque assist control. IC Role / Device Role / Timing Role: Direction-resolved speed sensor feeding EPS ECU to distinguish between driver-initiated turns and road-induced corrections. Use Value: Prevents assist reversal during transient vibrations by validating direction continuity using internal DR bit and GDR validity flag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wheel speed sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| A19303PUBATN-FAE-A | Same UB package, identical pinout, but supports AK protocol only (no PW mode); higher ASIL diagnostic coverage | Required where OEM mandates AK protocol compliance (e.g., VW, BMW platforms); lacks PW backward compatibility | Select when AK protocol is mandatory and system ECU supports 10-bit AK word decoding |
| ATS6858LSGT-T | Two-wire Hall sensor with integrated magnet; fixed AK protocol; no EEPROM; RθJA = 195°C/W (lower thermal resistance) | Designed for gear-tooth targets only; no ring magnet support; lacks air gap warning bits and extended diagnostics | Choose for cost-sensitive non-safety-critical applications where integrated magnet simplifies mechanical design |
Compared with A19302PUBATN-FAE-A, the A19303 variant offers deeper AK protocol feature set but sacrifices PW flexibility, while ATS6858 provides lower thermal resistance and integrated magnet-but omits EEPROM traceability, ASIL B SEooC certification, and dual-protocol capability essential for multi-OEM platform reuse.
Availability
A19302PUBATN-FAE-A is available at Aetrix Electronics and suitable for anti-lock braking systems, electronic stability control modules, and adaptive cruise control units requiring stable component supply across automotive production lifecycles.
Supply support for A19302PUBATN-FAE-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 power and sensing ICs, specializing in Hall-effect, current sensing, and motor driver solutions for automotive and industrial markets.
The A19302 product line was developed specifically for ISO 26262-compliant wheel speed sensing in safety-critical chassis control systems, emphasizing robustness in extreme temperature and magnetic interference environments.
FAQ
What is the function of the EEPROM in A19302PUBATN-FAE-A?
The EEPROM in A19302PUBATN-FAE-A stores unique device identification data and factory calibration parameters, enabling full traceability throughout the product lifecycle-from wafer lot to final vehicle assembly. This supports Tier 1 audit requirements and facilitates field failure analysis by linking operational behavior to specific manufacturing batches. The EEPROM is accessed internally during power-on initialization and does not require external programming interfaces.
Does A19302PUBATN-FAE-A support both ring magnets and ferromagnetic targets?
Yes, A19302PUBATN-FAE-A supports both ring magnets and ferromagnetic targets. When used with ring magnets, it operates in differential mode across its three Hall elements (E1–E3). With ferromagnetic targets, it requires back-biasing using an external magnet to generate sufficient field differential. The device automatically selects the active channel (A or B) at startup based on first switching event, ensuring reliable operation regardless of target type.
How does the ASIL B capability of A19302PUBATN-FAE-A integrate into a safety system?
A19302PUBATN-FAE-A is certified as a hardware safety element out-of-context (SEooC) with ASIL B capability per ISO 26262. Its ASIL functionality is activated in the -A suffix variant and includes continuous internal diagnostics, fault detection (e.g., overtemperature, magnetic saturation), and safe-state output (5 ms fault pulse). Integration requires adherence to the A19302 Safety Manual-specifically, proper power sequencing, thermal derating, and ECU-level fault response handling-to achieve end-system ASIL B compliance.
What is the significance of the "F" in A19302PUBATN-FAE-A's part number?
The "F" in A19302PUBATN-FAE-A denotes forward rotation definition: target features passing from pin 1 to pin 2 are interpreted as forward rotation. This configuration determines how direction bits (DR) are encoded in the PW protocol output. The alternate "R" variant defines forward rotation as movement from pin 2 to pin 1. Selection must match mechanical mounting orientation relative to the rotating target to ensure correct direction reporting in the host ECU.
Can A19302PUBATN-FAE-A operate reliably at 160°C ambient temperature?
A19302PUBATN-FAE-A is rated for –40°C to +160°C ambient operation, but junction temperature must remain ≤175°C. At TA = 160°C, power dissipation must be limited to ≤117 mW (e.g., VCC ≤ 7.0 V at ICC(AVG) = 16.6 mA) using worst-case RθJA = 213°C/W. Reliable operation at max ambient requires careful thermal design-such as minimizing copper isolation around the package and avoiding nearby heat sources-to prevent thermal shutdown or accelerated aging of the molded encapsulant.
A19302PUBATN-FAE-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Package/Case:
- 2-SIP Module
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 5.2V ~ 24V
- Mounting Type:
- Through Hole
- Termination Style:
- PC Pin
- Operating Temperature:
- -40°C ~ 160°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 2-UltraMini SIP
A19302PUBATN-FAE-A FAQ
1.How can I place an order for A19302PUBATN-FAE-A through Aetrix?
Please submit a Request for Quotation (RFQ) for A19302PUBATN-FAE-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 A19302PUBATN-FAE-A reliable?
The price and inventory of A19302PUBATN-FAE-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A19302PUBATN-FAE-A is usually 5 days.
3.What payment methods are accepted for A19302PUBATN-FAE-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A19302PUBATN-FAE-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A19302PUBATN-FAE-A?
A19302PUBATN-FAE-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A19302PUBATN-FAE-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 A19302PUBATN-FAE-A?
For technical support, including A19302PUBATN-FAE-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A19302PUBATN-FAE-A requirements.
6.How does Aetrix verify that A19302PUBATN-FAE-A is sourced from the original manufacturer or authorized distributors?
All A19302PUBATN-FAE-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 A19302PUBATN-FAE-A meets industry standards.
7.What is the process for return or replacement of A19302PUBATN-FAE-A?
All A19302PUBATN-FAE-A units undergo pre-shipment inspection (PSI). If there is an issue with A19302PUBATN-FAE-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 A19302PUBATN-FAE-A part is unused and in its original packaging.
Return procedure for A19302PUBATN-FAE-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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