FEATURES AND BENEFITS
• GMR elements provide highly repeatable, ultra-low jitter
signal for iTPMS and ADAS applications
• Wide Air Gap capability eases mechanical mounting
tolerance requirements to enable lower cost
• AK Protocol compliant output with air gap information
• SolidSpeed Digital Architecture provides robust,
adaptive performance with advanced algorithms
• ISO 26262 ASIL B(D) with integrated diagnostics and
certified safety design process (pending assessment)

DESCRIPTION
The A19351 is a giant magnetoresistance (GMR) magnetic
sensor integrated circuit (IC) designed to measure ring magnets
used in automotive braking systems, to provide wheel speed
and direction information. The IC fully integrates sensing
elements, voltage regulators, analog-to-digital converters, and
a digital controller to adaptively measure the magnetic signal
and provide a robust, low-jitter AK Protocol output across the
two-wire interface.
The A19351 features Allegro’s SolidSpeed Digital Architecture,
the latest mixed-signal speed sensor architecture for highly
adaptive performance that provides the widest dynamic range
of operating air gap and compensates for temperature drift
effects. Flexibility is passed to the system integrator, enabling
looser mechanical constraints with a wide operating air gap.
The A19351 was developed in accordance with ISO 26262
as a hardware safety element out of context with ASIL B(D)
capability (pending assessment) for use in automotive safetyrelated
systems when integrated and used in the manner
prescribed in the applicable safety manual and datasheet.
The A19351 is provided in a 2-pin SIP package (suffix UB)
that is lead (Pb) free, with tin leadframe plating. The UB
package includes an IC and protection capacitor integrated
into a single overmolded package, with an additional molded
lead-stabilizing bar for robust shipping and ease of assembly.