FEATURES AND BENEFITS
• GMR technology integrates high sensitivity MR
(magnetoresistive) sensor elements and high precision
BiCMOS circuits on a single silicon integrated circuit,
offering high accuracy, low magnetic field operation
• Allegro SM package with integrated EMC components
reduces need for external EMI protection
• ASIL B safety design process with integrated diagnostics
(pending assessment)
• Integrated back-biasing magnetic circuit
• Digital speed and direction output provides ferromagnetic
target position information
• Enhanced algorithm for low jitter, high output accuracy
performance, and vibration tolerance
• Center of package switching alignment option
• Programmable pulse location between center of target
feature or edge of target feature
• EEPROM programmable performance optimizations and
production traceability
• Target Profile Diagnostics™

DESCRIPTION
The ATS16951PSM is an optimized giant magnetoresistance
(GMR) integrated circuit (IC) and permanent magnet pellet
combined with integrated EMC protection components to
provide a user-friendly solution for digital gear tooth sensing.
The small package can be easily assembled and used in
conjunction with a wide variety of gear tooth targets and is
intended for automotive crankshaft applications.
The device incorporates multiple GMR elements into a single
IC that switches in response to differential magnetic signals
created by a ferromagnetic target. The IC contains a sophisticated
compensation circuit designed to eliminate detrimental effects
of magnet and system offsets. Digital processing of the analog
signal provides high performance independent of air gap
and allows for dynamic adaptation of device performance to
address the typical operating conditions found in automotive
applications. Threshold hysteresis reduces the negative effects of
any anomalies in the magnetic signal associated with system or
target anomalies typically seen in many automotive applications.
The ATS16951PSM is being developed in accordance with
ISO 26262 as a safety element out of context targeting ASIL B
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 ATS16951PSM is available in a 3-pin package (SM) that
is lead (Pb) free, with NiPdAu plating.