A19350: High Accuracy GMR Wheel Speed and Direction Sensor IC

Description

The A19350 is a giant magnetoresistance (GMR) integrated circuit (IC) that provides a user-friendly two-wire solution for applications where speed and direction information is required. The small integrated package includes an integrated capacitor and GMR IC in a single overmold design with an additional molded lead-stabilizing bar for robust shipping and ease of assembly.

The GMR-based IC is designed for use in conjunction with front-biased ring magnet encoders. State-of-the-art GMR technology with industry-leading signal processing algorithms accurately switch in response to low-level differential magnetic signals. The high sensitivity of GMR combined with differential sensing offers inherent rejection of interfering common-mode magnetic fields and valid speed and direction over larger air gaps, commonly required in wheel speed sensing applications.

Patented GMR technology allows the same orientation as Hall-effect for a drop-in solution in the application.

Integrated diagnostics are used to detect an IC failure which impacts the output protocol’s accuracy, providing coverage compatible with ASIL B compliance. Built-in EEPROM scratch memory offers traceability of the device throughout the IC’s production process.

The IC is offered in the UB package, which integrates the IC and a high-temperature ceramic capacitor in a single overmold SIP package for enhanced EMC performance. The 2-pin SIP package is lead (Pb) free, with tin leadframe plating.

 For application needing just speed sensing, please see the A19250 High Accuracy GMR Wheel Speed Sensor IC.

Top Features

  • GMR technology integrates high sensitivity MR (magnetoresistive) sensor elements and high precision BiCMOS circuits on a single silicon integrated circuit, offering high accuracy, low magnetic field operation
  • Integrated capacitor in a single overmolded miniature package provides greater EMC robustness
  • SolidSpeed Digital Architecture™ supports advanced algorithms, maintaining performance in the presence of extreme system-level disturbances, including vibration immunity capability over the full target pitch
  • Flexible orientation for xMR or Hall replacement
  • ASIL B rating based on integrated diagnostics and certified safety design process
  • Two-wire current source output pulse-width protocol supporting speed, direction, and ASIL
  • EEPROM offers device traceability throughout the production process

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
A19350LUBATN-FBE 2-lead SIP -40°C to 150°C Yes View Data New Contact your
local sales rep
Check
Distributor Stock
A19350LUBATN-RBE 2-lead SIP -40°C to 150°C Yes View Data New Contact your
local sales rep
Check
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

Packaging