FEATURES AND BENEFITS
Ideally suited for xEV asynchronous electric motor
applications with narrow-pitch targets
• High-speed switching bandwidth up to 40 kHz
• Two independent output channels for either speed and
direction or AB outputs in quadrature
• ASIL B(D) compliant (ISO 26262) with optional fault
detection output protocol
• Differential sensing for robustness to external magnetic
disturbance
• EEPROM-enabled factory traceability throughout
product lifecycle
• Also available with integrated magnet (see ATS17502
datasheet)

DESCRIPTION
The A17502 is a single IC solution designed for rotational
position sensing of a ring-magnet target found in automotive
and industrial electric-motor applications (often with specific
application and safety requirements).
Three Hall elements are incorporated to create two independent
differential channels. These inputs are processed by digital
circuits and robust algorithms designed to eliminate the
detrimental effects of magnetic and system offsets, and to
address false output transitions caused by target vibrations
in electric motors at startup and low-speed operation. The
differential signals are used to produce a highly accurate
speed output and, if desired, provide data about the direction
of rotation.
Advanced calibration techniques are used to optimize signal
offset and amplitude. This calibration, combined with digital
tracking of the signal, results in accurate switch points over
air gap, speed, and temperature.
The IC can be programmed for a variety of applications
requiring dual-phase target speed and position signal data
or simultaneous high-resolution target speed and direction
data. It can be configured to enable fault-detection mode for
ASIL B(D) utilization.
The A17502 K package is a lead (Pb) free 4-pin SIP package
with a 100% matte-tin-plated lead frame.