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
eliminates need for external EMI protection
• True target state recognition at device power-on
(TPOS)
• EEPROM programming for performance optimization,
temperature compensation, and production traceability
• Flexible orientation: Able to be mounted at any angle
with correct configuration
• Stray Field Immunity: Resists aggressor stray fields
found in hybrid vehicle environments
• Backward compatibility with Allegro’s Hall-effect
solutions performance
• Target Profile Diagnostics

DESCRIPTION
The ATS16351 is a True Power-On State (TPOS) camshaft
sensor incorporating a back-biasing magnet, advanced fully
synchronous digital IC, and EMC protection circuit all in a
single sensing solution.
The ATS16351 incorporates a GMR bridge with an optimized
custom magnetic circuit that switches in response to magnetic
signals induced by a ferromagnetic target. The IC contains a
sophisticated digital circuit designed to match the temperature
behavior of the sensor IC with the integrated magnet. Signal
processing is used to provide zero-speed performance
independent of air gap and is designed for the typical operating
conditions found in automotive camshaft sensing applications.
The resulting output of the device is a digital representation
of the ferromagnetic target profile.
The Auto-TPOS feature of the ATS16351 enables the sensor
IC to learn the installation air gap inside of the engine and to
autonomously reprogram into memory the optimal threshold
for power-on accuracy.
A number of factory-programmable options allow for
performance optimization to meet specific application
requirements.
The ATS16351PSM is available in a 3-pin package (SM) that
is lead (Pb) free, with 100% NiPdAu plating