MagAlpha MA120

Angular Sensor for Brushless

Motor Commutation

PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE

MA120 Rev. 1.2

www.MonolithicPower.com

1

7/25/2016

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

Preliminary Specifications Subject to Change

© 2016 MPS. All Rights Reserved.

DESCRIPTION

The MagAlpha MA120 magnetic sensor is an all-

in-one solution designed to replace Hall switches

for 3-phase block commutation in brushless DC

motors. The MA120 detects the absolute angular

position of a permanent magnet, typically a

diametrically magnetized cylinder attached to the

rotor. The data acquisition and processing is

extremely

fast,

allowing

for

accurate

angle

measurement at speeds from 0 to 120,000 RPM.

The MA120 supports a wide magnetic field

strength range, which helps relax mechanical

tolerances and simplify system design

.

FEATURES



UVW Signals for Block Commutation



11-Bit Resolution Absolute Angle Encoder



500kHz Refresh Rate



Ultra-Low Latency: 3µs



SPI Serial Interface



3.3V, 7.7mA Supply



Available in a QFN-16 (3mmx3mm) Package

APPLICATIONS



PSM/BLDC Motors

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.

Please See Position Sensor Design Support for All

Supporting Software

TYPICAL APPLICATION