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MA850

8-Bit, Contactless, Angle Encoder with PWM Output and Push Button Function

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Datasheet

Description

The MagAlpha MA850 is a simple-to-use magnetic angle encoder designed to replace analog potentiometers or rotary switches. The sensor detects the absolute angular position of a permanent magnet attached to a rotating shaft and outputs a PWM waveform with 8-bit resolution.

The user has wide flexibility in terms of magnet shapes and configurations. Typically, the MA850 is used with a diametrically magnetized cylinder of 3mm to 8mm in diameter.

The MA850 features programmable magnetic field strength thresholds which allow implementation of a push or pull button function. When triggered, these are readable as register bits and also output as two logic signals.

On-chip non-volatile memory provides storage for configuration parameters including the reference zero angle position and the magnetic field detection threshold settings.

Features & Benefits

8-Bit Resolution Absolute Angle Encoder
Contactless Sensing for Long Life with No Wear
SPI Serial Interface for Chip Configuration
Programmable Magnetic Field Strength Detection for Push/Pull Button Detection
3.3V, 12mA Supply
PWM Output
-40 to +125°C Operating Temperature
Available in a QFN-16 (3mmx3mm) Package

Additional Resources

Sensor Brochure

TBMA User Guide

Magnetic Design Tool

MagAlpha Arduino Library

MagAlpha Sample Code

AppNote: Selecting the Right Magnet

AppNote: Sense BLDC Rotor Position

AppNote: Replace Optical Encoders

Evaluation Tools

EVKT850-KNOB-Q-01A Evaluation Kit Rotary Knob Eval Kit for the Angular Sensing and Push-Button Features of MagAlpha Sensors

The EVKT-KNOB kit evaluates the angular sensing and push-button features of the MA850. It is delivered assembled and with a knob and magnet. The sensor is mounted in an end-of-shaft configuration.

It requires the communications kit (EVKT-MACOM) and the Macom App Software (see below) to evaluate MagAlpha functionality and performance with your set-up, such as noise level, refresh rate, power-up time, and magnetic field dependence.

$50.00
+ tax

TBMA850-Q-RD-01A

Round Eval Board for MA850

TBMA850-Q-LT-01A

Long Eval Board for MA850

Macom App Software

Windows Desktop Application + Drivers for the MagAlpha Communication Kit.

Buy direct from MPS