MagAlpha MA800

8-Bit Contactless Angle Encoder with

Push Button Function

MA800 Rev. 1.02

www.MonolithicPower.com

1

6/15/2018

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© 2018 MPS. All Rights Reserved.

DESCRIPTION

The MA800 is an easy-to-use, magnetic, angle

encoder with a digital output designed to

replace

analogic

potentiometers

or

rotary

switches. The MA800 is designed for slow

operation such as human-machine interface,

manual controls, etc. where the rotating speed

remains below 200 rpm. The sensor detects the

absolute angular position of a permanent

magnet attached to a rotating shaft.

The magnet shapes and configurations are very

flexible. Typically, the MA800 is used with a

diametrically magnetized cylinder of 2 - 8mm in

diameter.

The MA800 features programmable magnetic

field strength thresholds, which allow for the

implementation of a push or pull button function.

These are output as two logic signals.

On-chip non-volatile memory provides storage

for the configuration parameters, including the

reference zero angle position and magnetic

field detection threshold settings.

FEATURES

 8-Bit Resolution Absolute Angle Encoder

 Contactless Sensing for Long Life with No

Wear

 SPI and SSI Serial Interface

 Programmable Magnetic Field Strength

Detection for Push/Pull Button Detection

 3.3V, 12mA Supply

 -40 to +125°C Operating Temperature

 Available

in

a

QFN-16

(3mmx3mm)

Package

APPLICATIONS

 Rotary Knob Control Interfaces

 Manual Controls

 Encoders

 Automotive

 White Goods

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