A19250: High Accuracy GMR Wheel Speed Sensor IC

The A19250 is a giant magnetoresistance (GMR) integrated circuit (IC) that provides a user-friendly two-wire solution for applications where speed 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, low jitter, and high pitch accuracy, 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.

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 speed and direction sensing, please see theA19350 High Accuracy GMR Wheel Speed and Direction Sensor IC.

• GMR technologyintegrates high sensitivity MR (magnetoresistive) sensor elements and high precision BiCMOS circuits on a single silicon integrated circuit, offering high accuracy, low magnetic field operation
• 我ntegrated capacitorin a single overmolded miniature package provides greater EMC robustness
• SolidSpeed Digital Architecture™supports advanced digital processing providing highly accurate edge performance in the presence of extreme system-level disturbances
• Compatible orientationfor Hall replacement
• Two-wire current source outputsupporting speed protocol
• EEPROMoffers device traceability throughout the production process