High-Accuracy Hall-Effect Transmission Speed Sensor IC


Allegro 2-Pin SIP UB Package


Top Features


The A19420 is an optimized Hall-effect integrated circuit (IC) that measures the speed of rotating targets. This sensor IC can be used to directly measure ring magnets or be back-biased with a magnet to measure ferrous targets. The package features an integrated capacitor for electromagnetic compatibility (EMC).

The A19420 SolidSpeed Digital Architecture™ offers intelligent algorithms capable of stable operation during sudden and dynamic air gap movements. The sophisticated digital controller provides highly accurate speed detection ideal for transmission applications. In addition, the A19420 differential sensing offers inherent rejection of interfering common-mode magnetic fields.

The A19420 was developed in accordance with ISO 26262:2011 as a hardware safety element out of context with ASIL B capability (pending assessment) for use in automotive safety related systems when integrated and used in the manner prescribed in the applicable safety manual and datasheet.

The A19420 is provided in a 2-pin SIP package (suffix UB) that is lead (Pb) free, with tin lead frame plating. The UB package includes an IC and capacitor integrated into a single overmolded package, with an additional molded lead-stabilizing bar for robust shipping and ease of assembly.

  • Differential Hall-effect sensor measures ring magnets and ferrous targets with inherent stray field immunity
  • SolidSpeed Digital Architecture™ supports advanced algorithms, maintaining pitch and duty cycle accuracy during dynamic air gap disturbances
  • Integrated solution includes a capacitor in a single overmolded package
  • ISO 26262:2011 ASIL B with integrated diagnostics and certified safety design process (pending assessment)
  • Two-wire current source output protocol supporting speed and ASIL error reporting
  • EEPROM enables traceability throughout product life cycle

The A19420  is available in a lead (Pb) free 2-pin SIP (Suffix UB) package with a 100% matte tin plated leadframe.

UB Package Documentation

Part Number Specifications and Availability