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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.
|Document Type||Document Name|
|Application Note||Methods and Validation of Stray Magnetic Field Mitigation in Magnetic Speed Sensor ICs|
|Application Note||Fundamental Properties of Speed Sensors|
|Application Note||Allegro Hall-Effect Sensor ICs|
|Application Note||Allegro Microsystems - Chemical Exposure of Devices|
|Guide||Guidelines for Designing Subassemblies Using Hall-Effect Devices|
|Guide||Hall-Effect IC Applications Guide|
|Technical Article||Soldering Methods for Allegro Products (SMD and Through-Hole)|
|Technical Article||Back-Biased Packaging Advances (SE, SG, SH, and SJ versus SA and SB)|