MagAlpha MA302

12-Bit, Digital, Contactless Angle Sensor

with ABZ & UVW Incremental Outputs

MA302 Rev. 1.1

www.MonolithicPower.com

1

2/7/2020

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© 2020 MPS. All Rights Reserved.

DESCRIPTION

The MA302

detects the

absolute

angular

position of a permanent magnet, typically a

diametrically magnetized cylinder on a rotating

shaft. Fast data acquisition and processing

provide accurate angle measurement at speeds

from 0 to 60,000 rpm.

The MA302 supports a wide range of magnetic

field strengths and spatial configurations. Both

end-of-shaft and off-axis (side-shaft mounting)

configurations are supported.

The MA302 features magnetic field strength

detection with programmable thresholds to allow

sensing of the magnet position relative to the

sensor for creation of functions such as sensing

of axial movements or for diagnostics.

On-chip non-volatile memory provides storage

for

configuration

parameters,

including

the

reference zero angle position, ABZ encoder

settings, UVW pole pair emulation settings, and

magnetic field detection thresholds.

FEATURES

 12-Bit Resolution Absolute Angle Encoder

 Contactless Sensing for Long Life

 SPI Serial Interface for Digital Angle Readout

and Chip Configuration

 Incremental 10-Bit ABZ Quadrature Encoder

Interface with Programmable Pulses Per

Turn from 1 to 256

 UVW Interface with 1 to 8 Pole Pair

Emulation

 Programmable Magnetic Field Strength

Detection for Diagnostic Checks

 3.3V, 12mA Supply

 -40°C to +125°C Operating Temperature

 Available in a QFN-16 (3mmx3mm) Package

APPLICATIONS

 Brushless DC Motor Servo Drives

 Motor Commutation

 Motor Speed and Position Control

 Robotics

All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For

MPS green status, please visit the MPS website under Quality Assurance.

“MPS”

and “The Future of Analog IC Technology” are registered trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION