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Angle Sensor IC with SPI and SENT/PWM Outputs

A1338

A1338 Product Image

The A1338 offers flexible angle measurement with SPI and SENT/PWM outputs, integrated diagnostics, and user-programmable features for optimized performance in automotive applications.

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A1338 データシート
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Top Features

Packaging

  • Contactless 0° to 360° angle sensor IC, for angular position and rotation direction measurement
    • Circular Vertical Hall (CVH) technology provides a single-channel sensor system, with air gap independence
    • 12-bit resolution possible in Low RPM mode, 10-bit resolution in High RPM mode
    • Angle Refresh Rate (output rate) configurable between 25 and 3200 μs through EEPROM programming
    • Capable of sensing magnetic rotational speeds up to 7600 rpm, and up to 30,000 rpm with reduced accuracy
    • SPI (mode 3), and SENT (Single Edge Nibble Transmission) or PWM (Pulse-Width Modulation)*
    • SPI interface provides a robust communication protocol for fast angle readings*
    • SENT output supports four modes: SAEJ2716 (JAN2010) and Allegro proprietary options of Triggered SENT (TSENT), Sequential SENT (SSENT), and Addressable SENT (ASENT)*
    • Programmable via Manchester Encoding on the VCC line, reducing external wiring*
    • SPI and SENT interfaces allows use of multiple independent sensors for applications requiring redundancy*
  • Advanced diagnostics to support safety-critical applications, including:
    • On-chip, user-controlled logic built-in self-test (LBIST) and signal path diagnostics
    • 4-bit CRC on SPI messages
    • User-Programmable Missing Magnet Error flag for notifying controller of low magnetic field level
  • Diagnostics are initiated over the SPI or SENT interface and can directly test proper operation of the IC in safety-critical applications
  • EEPROM with Error Correction Control (ECC) configuration, sensor calibration including end-of line adjustments like programmable angle reference (0°) position and rotation direction (CW or CCW)
  • Available in both single-die and dual-die configurations
    • Dual-die devices contain two independent die housed within a single package
  • Absolute maximum VCC of 26.5 V for increased robustness and direct connection to automotive vehicle battery
  • Allegro Sensor Bias LDO


* See Selection Guide for more details.
A1338 Packages
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Part Number Specifications and Availability

Documentation and Resources

Documentation

Design Tools

Filter Document Type:
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All Types Application Note
Documents Found: 32
Document Type Document Name
Application Note
Microcontroller-Based Linearization of Angular Sensor ICs
Application Note
A1337/A1338 System Timing
Application Note
Guidelines for Using Allegro Angular Sensors
Application Note
Fuel Level Sensor Using Hall-Effect Sensor ICs
Filter Document Type:
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All Types Hardware Kit or Board User Guide
Documents Found: 32
Document Type Document Name
Hardware Kit or Board
ASEK-20 Sensor Evaluation Kit
User Guide
A1337 Hardware (User Guide)