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Allegro MicroSystems A31315LOLATR-XZ-S-AR-10
- Part No.:
- A31315LOLATR-XZ-S-AR-10
- Manufacturer:
- Allegro MicroSystems
- Category:
- Angle, Linear Position Measuring
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
A31315LOLATR-XZ-S-AR-10.pdf
- Description:
- SENSOR ANGLE 360DEG SMD
- Quantity:
- Payment:
- Shipping:
Inventory:4,751
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Product details
Overview
A31315LOLATR-XZ-S-AR-10 from Allegro MicroSystems is a 3D magnetic position sensor IC designed for contactless on-axis and off-axis rotary and linear stroke measurement in automotive throttle, transmission, and pedal systems. It integrates vertical and planar Hall-effect elements, delivers ratiometric analog output of X- and Z-axis magnetic field components, operates from 4.5–5.5 V, supports –40°C to 150°C ambient, and achieves ±1.0° angle error at 25°C.
For engineers reviewing the A31315LOLATR-XZ-S-AR-10 datasheet, A31315LOLATR-XZ-S-AR-10 pinout, A31315LOLATR-XZ-S-AR-10 application, or A31315LOLATR-XZ-S-AR-10 equivalent, this page provides verified package mapping (SOIC-8), confirmed analog ratiometric interface behavior, factory-configured X/Z axis selection, EEPROM-programmable linearization, and ISO 26262 ASIL B hardware safety compliance details.
Technical Context
The A31315LOLATR-XZ-S-AR-10 implements dual-axis (X and Z) magnetic field sensing using integrated Hall plates with temperature-compensated signal conditioning. Its analog ratiometric output scales linearly with supply voltage (VCC), delivering 8–92% VCC proportional to field magnitude up to ±1000 G.
Signal processing includes configurable low-pass filtering (7 bandwidth options), factory-trimmed sensitivity (32.125 LSB/G typical), and on-chip CORDIC-based angle calculation-though unused in this AR variant since only raw channel outputs are enabled. Diagnostics include undervoltage (3.6–4.2 V threshold), overvoltage (5.6–10.4 V), broken-wire detection (<500 µs response), and EEPROM integrity checks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Interface | Ratiometric analog: output voltage = (field magnitude / full-scale) × VCC × 0.84, enabling direct ADC sampling without external reference. |
| Sensing Axes | X and Z axes only-factory-selected and fixed; no Y-axis data available in this variant. |
| Full-Scale Field Range | ±1000 G-supports high-strength magnets used in transmission fork and park lock applications. |
| Angle Error (XZ) | ±1.2° over –40°C to 150°C-meets AEC-Q100 Grade 0 requirements for automotive under-hood use. |
| Supply Voltage | 4.5–5.5 V-compatible with standard 5 V automotive power domains; includes internal UV/OV protection. |
| Operating Temperature | –40°C to 150°C-validated for engine bay, transmission, and brake system mounting locations. |
| EEPROM Endurance | 100 write cycles-sufficient for one-time calibration and configuration during end-of-line programming. |
Pinout & Package
Package: SOIC-8 surface-mount (OLA suffix), single-die configuration, 150°C rated, footprint compatible with JEDEC MS-012AC.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC | Main supply input (4.5–5.5 V); powers internal regulators, Hall sensors, and analog output stage. |
| 2 | NC | No connect-must be tied to GND per ESD best practice; not internally bonded. |
| 3 | GND | Analog ground reference for Hall sensing, DAC, and output buffer; shared with VCC return path. |
| 4 | OUT | Analog ratiometric output: voltage proportional to |BX| or |BZ| depending on internal register setting; drives 10 kΩ load minimum. |
| 5–8 | NC | All no-connect pins-electrically isolated; tie to GND for mechanical stability and ESD robustness. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-configured X/Z axis selection | Eliminates need for external multiplexing or host-side axis routing logic in throttle and shifter position sensing. |
| Ratiometric analog output | Removes dependency on stable external voltage reference; enables direct connection to microcontroller ADC with shared VCC rail. |
| AEC-Q100 Grade 0 qualification | Validated for 150°C continuous operation-suitable for placement near engines, transmissions, and exhaust manifolds. |
| Integrated diagnostics | Real-time monitoring of undervoltage, overvoltage, broken-wire, and EEPROM integrity-reduces need for external supervision circuits. |
| Configurable low-pass filter | 7 selectable bandwidths (BW_SEL = 0–6) allow trade-off between noise rejection and response time (396–450 µs step response). |
Applications
| Throttle Position Sensing | Transmission Park Lock Detection |
|---|---|
|
Use Scenario: Monitoring angular displacement of throttle butterfly valve in gasoline and hybrid powertrains. IC Role / Device Role / Timing Role: Contactless absolute angle measurement of rotating magnet mounted on throttle shaft; outputs analog voltage proportional to opening angle. Use Value: Enables precise air-fuel ratio control and torque management with ±1.2° accuracy across full temperature range and lifetime drift < ±0.93° post-Q100 stress. |
Use Scenario: Detecting mechanical engagement state of park lock pawl in automatic transmissions. IC Role / Device Role / Timing Role: Linear stroke sensing of magnet attached to park lock actuator rod; resolves position via X- and Z-field vector magnitude changes. Use Value: Provides fail-safe park confirmation with built-in diagnostics (UVD/OVD/Broken Wire) meeting ASIL B requirements for gear selector safety integrity. |
| Pedal Position Sensing | Valve Actuator Feedback |
|
Use Scenario: Measuring accelerator or brake pedal travel in drive-by-wire systems. IC Role / Device Role / Timing Role: Off-axis rotary sensing of magnet on pedal pivot; ratiometric analog output interfaces directly to MCU ADC. Use Value: Delivers high linearity (±0.3% channel error) and low noise (5.245 mG RMS) for smooth pedal response without external signal conditioning. |
Use Scenario: Closed-loop feedback for EGR, turbocharger, or HVAC blend door actuators. IC Role / Device Role / Timing Role: Short-stroke (<360°) rotary position measurement of actuator shaft; X/Z field pair enables robust angle resolution despite misalignment. Use Value: Supports redundant sensing architecture when paired with second A31315; factory trimming eliminates need for system-level calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3D magnetic position sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| A31315LOLATR-XZ-S-SE-10 | Same SOIC-8 package and X/Z axis configuration, but uses SENT (SAE J2716) digital output instead of analog ratiometric. | Requires host microcontroller with SENT decoder; supports dual-channel field reporting and higher noise immunity in EMI-heavy environments. | Select when digital communication, diagnostic message richness, or multi-parameter output (e.g., both X and Z fields) is required. |
| TLV493DW2B6A1 | Infineon 3D Hall sensor in TSSOP-16; I²C interface, ±150 mT range, 12-bit resolution; no EEPROM or ASIL certification. | Lacks automotive safety qualification, EEPROM programmability, and integrated diagnostics; limited to non-safety-critical consumer/industrial use. | Select only for cost-sensitive, non-automotive designs where ASIL compliance and field-programmable linearization are unnecessary. |
Compared with A31315LOLATR-XZ-S-AR-10, the SENT variant offers richer diagnostics and dual-axis reporting but requires additional host firmware support, while the TLV493DW2B6A1 lacks safety certification and field-range flexibility-making A31315LOLATR-XZ-S-AR-10 the only option qualified for ASIL B throttle and transmission position sensing.
Availability
A31315LOLATR-XZ-S-AR-10 is available at Aetrix Electronics and suitable for automotive throttle position, transmission park lock, and pedal position sensing requiring stable component supply, long-term lifecycle continuity, and AEC-Q100-compliant sourcing.
Supply support for A31315LOLATR-XZ-S-AR-10 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, with global manufacturing and test operations.
The A31315 product line delivers 3D magnetic position sensing for automotive safety-critical systems, emphasizing ISO 26262-compliant hardware design, AEC-Q100 Grade 0 reliability, and flexible field-axis configuration for mechanical integration in constrained spaces.
FAQ
What output format does the A31315LOLATR-XZ-S-AR-10 provide?
The A31315LOLATR-XZ-S-AR-10 provides a ratiometric analog voltage output proportional to the magnetic field magnitude on either the X or Z axis-selected at factory-and scales linearly with VCC (4.5–5.5 V). It does not support PWM or SENT output modes; those require different part numbers like A31315LOLATR-XZ-S-SE-10. The output drives loads down to 10 kΩ and features ±0.2% ratiometry error.
Is the A31315LOLATR-XZ-S-AR-10 qualified for automotive under-hood applications?
Yes, the A31315LOLATR-XZ-S-AR-10 is AEC-Q100 Grade 0 qualified for operation from –40°C to +150°C ambient, with validated performance including ±1.2° angle error and < ±0.93° post-stress drift. It includes overvoltage (up to 10.4 V), undervoltage (3.6–4.2 V), and reverse-voltage protection-making it suitable for engine bay, transmission, and brake module placements.
Can the sensing axes of the A31315LOLATR-XZ-S-AR-10 be reconfigured after shipment?
No, the A31315LOLATR-XZ-S-AR-10 has factory-configured X and Z axis selection that is permanently programmed and cannot be changed in the field. Axis configuration is set during final test and stored in one-time-programmable registers; only linearization parameters, filter bandwidth, and diagnostic thresholds are user-programmable via the EEPROM (100-cycle endurance).
Does the A31315LOLATR-XZ-S-AR-10 support functional safety standards?
Yes, the A31315LOLATR-XZ-S-AR-10 is developed as a hardware safety element out of context (SEooC) per ISO 26262, with ASIL B capability for single-die configurations. It includes on-chip diagnostics for undervoltage, overvoltage, broken wire, EEPROM integrity, and oscillator failure-all documented in the safety manual and required for integration into ASIL B automotive systems like throttle and park lock control.
What is the maximum magnetic field the A31315LOLATR-XZ-S-AR-10 can measure?
The A31315LOLATR-XZ-S-AR-10 is specified for operation up to ±1000 G (±100 mT), as indicated by the "-10" suffix in its part number. At fields above ±300 G, performance is characterized but not fully guaranteed; Allegro recommends maintaining a 10% margin below saturation (i.e., ≤ ±900 G) to ensure linearity and avoid clipping in dynamic applications such as transmission shift forks.
A31315LOLATR-XZ-S-AR-10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- A31315
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- For Measuring:
- Linear, Rotary Position
- Technology:
- Hall Effect
- Rotation Angle - Electrical, Mechanical:
- 0° ~ 360°
- Linear Range:
- -
- Output:
- Analog Voltage
- Output Signal:
- Programmable
- Actuator Type:
- External Magnet, Not Included
- Linearity:
- ±0.3%
- Resistance:
- 4.23 kOhms
- Resistance Tolerance:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Mounting Type:
- Surface Mount
- Termination Style:
- Gull Wing
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
A31315LOLATR-XZ-S-AR-10 FAQ
1.How can I place an order for A31315LOLATR-XZ-S-AR-10 through Aetrix?
Please submit a Request for Quotation (RFQ) for A31315LOLATR-XZ-S-AR-10 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 A31315LOLATR-XZ-S-AR-10 reliable?
The price and inventory of A31315LOLATR-XZ-S-AR-10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for A31315LOLATR-XZ-S-AR-10 is usually 5 days.
3.What payment methods are accepted for A31315LOLATR-XZ-S-AR-10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for A31315LOLATR-XZ-S-AR-10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for A31315LOLATR-XZ-S-AR-10?
A31315LOLATR-XZ-S-AR-10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your A31315LOLATR-XZ-S-AR-10 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 A31315LOLATR-XZ-S-AR-10?
For technical support, including A31315LOLATR-XZ-S-AR-10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your A31315LOLATR-XZ-S-AR-10 requirements.
6.How does Aetrix verify that A31315LOLATR-XZ-S-AR-10 is sourced from the original manufacturer or authorized distributors?
All A31315LOLATR-XZ-S-AR-10 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 A31315LOLATR-XZ-S-AR-10 meets industry standards.
7.What is the process for return or replacement of A31315LOLATR-XZ-S-AR-10?
All A31315LOLATR-XZ-S-AR-10 units undergo pre-shipment inspection (PSI). If there is an issue with A31315LOLATR-XZ-S-AR-10, 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 A31315LOLATR-XZ-S-AR-10 part is unused and in its original packaging.
Return procedure for A31315LOLATR-XZ-S-AR-10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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