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.