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Precision TMR Angle Sensor with Integrated Diagnostics and Turns Counter

A33115

Allegro LE 14 Package Image
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Description

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Packaging

The A33115 is a 360° angle sensor ICs that provide contactless high-resolution angular position information based on magnetic sensing that combines TMR (Tunneling MagnetoResistance) and VH (Vertical Hall) technologies.

The device is a system-on-chip (SoC) architecture that includes two independent angle sensing channels, digital signal processing, and output options: SPI, PWM, motor commutation (U, V, W), and encoder outputs (A, B, I).

Also integrated into the devices are on-chip EEPROM technology, capable of supporting a high number of read/write cycles for flexible end-of-line programming of calibration parameters.

  • Primary TMR channel capable of 14-bit noise-free resolution 
  • Secondary channel capable of 10-bit noise-free resolution
  • Wide operating voltage (3.7 to 18 V) enables direct connection to vehicle battery
  • Low Power Mode where the IC monitors and maintains turns count of the magnet in a key-off condition
  • Linearization to reduce error from misalignment between the sensor and target magnet
  • AEC-Q100 grade 1 
  • Designed to meet ASIL D requirements when used in conjunction with appropriate system-level control 

14-pin TSSOP (suffix LE)

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Part Number Specifications and Availability

Documentation and Resources

Documentation

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All Types Application Note Technical Article
Documents Found: 32
Document Type Document Name
Application Note
Output Protocols for Angle and Linear Position Sensors
Application Note
Guidelines for Using Allegro Angular Sensors
Application Note
Introduction to Allegro SPI
Technical Article
Enabling New Levels of Performance and Safety in Magnetic Sensors with xMR
Technical Article
Allegro TMR: A Cutting-Edge Sensing Solution for Driving Automation and ADAS