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.