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Large Air Gap, GMR Transmission Speed and Direction Sensor IC with ASIL Compliance

A19571

Allegro 2-Pin SIP UB Package

The A19571 provides high-sensitivity speed and direction sensing for ring magnets, using GMR technology for extended air gap performance and ASIL compliance for functional safety in automotive transmission applications.

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Top Features

Packaging

  • GMR technology delivers high magnetic sensitivity for large air gaps and minimal jitter
  • SolidSpeed Digital Architecture™ provides robust, adaptive performance with advanced algorithms that provide vibration immunity over the full target pitch
  • Flexible sensing orientation allows parallel or perpendicular placement to the magnet
  • ISO 26262 ASIL B with integrated diagnostics and certified safety design process (pending assessment)
  • Two-wire current source output with protocol options
  • EEPROM enables traceability throughout product life cycle

The A19571 is provided in a 2-pin miniature SIP package (suffix UB) that is lead (Pb) free, with tin leadframe plating. The UB package includes an IC and capacitor integrated into a single overmolded package, with an additional molded leadstabilizing bar for robust shipping and ease of assembly.

UB Package Documentation

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Part Number Specifications and Availability

Differential Speed Sensor System Solutions

Seth Prentice, Strategic Marketing Manager for Allegro MicroSystems Speed Sensor IC group, discusses IC solutions for designing speed sensing applications including automotive transmissions, washing machine drum speeds, and fork lift positioning requiring reliable consistent output signals. 

Documentation and Resources

Documentation

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Documents Found: 32
Document Type Document Name
Application Note
Giant Magnetoresistance versus Hall-effect: A Comparison of Technologies for Speed Sensor Applications
Application Note
Understanding Input Signal Variation in Sensor ICs with SolidSpeed Digital Architecture
Application Note
Fundamental Properties of Speed Sensors