MA850

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


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Product 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.

Product Features

  • 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

Parametrics

  • PackageQFN-16 (3x3)
  • Vin (min) (V)3
  • Vin (max) (V)3.6
  • PWM Frequency (Hz)50000
  • fcutoff (Hz)200
  • Latency (µs)2000
  • Isupply (mA)11.7
  • tstart-up (ms)20
  • GradeCatalog
  • Refresh Rate (kHz)1000
  • Output FormatPWM, SPI
  • Resolution (bits)8
  • Sensor PositionEnd-of-Shaft
  • Temp Range (°C)-40 to +125
  • Magnetic Field DetectionYes
  • Magnetic Field (Min) (mT)30

Evaluation Kit

GET THIS KIT

Kit details

The TBMA is a test board for the MagAlpha magnetic position sensor family. The TBMA allows users to run and test the MagAlpha sensor quickly. TBMA boards exist in two different formats: round (RD) and long (LT). In the RD format, the sensor is mounted in an end-of-shaft configuration. In the LT format, the sensor is mounted on the edge of the board and can therefore be used in both side-shaft and end-of-shaft configurations.

The TBMA is compatible with the Macom kit, offering seamless connection and operation of the MagAlpha and allowing users to evaluate MagAlpha functionalities and performances with their own set-up.

Contrary to the EVMA, the TBMA only includes the assembled board with the sensor and decoupling capacitors. It does not include connectors.

$10.00 + tax


Evaluation Kit

GET THIS KIT

Kit details

The TBMA is a test board for the MagAlpha magnetic position sensor family. The TBMA allows users to run and test the MagAlpha sensor quickly. TBMA boards exist in two different formats: round (RD) and long (LT). In the RD format, the sensor is mounted in an end-of-shaft configuration. In the LT format, the sensor is mounted on the edge of the board and can therefore be used in both side-shaft and end-of-shaft configurations.

The TBMA is compatible with the Macom kit, offering seamless connection and operation of the MagAlpha and allowing users to evaluate MagAlpha functionalities and performances with their own set-up.

Contrary to the EVMA, the TBMA only includes the assembled board with the sensor and decoupling capacitors. It does not include connectors.

$10.00 + tax


Evaluation Kit

GET THIS KIT

Kit details

The EVKT-KNOB is an evaluation kit for the MagAlpha magnetic position sensor family. The EVKT-KNOB allows users to run and test the MagAlpha sensor quickly. It is delivered assembled with a knob and magnet. The sensor is mounted in an end-of-shaft configuration.

The EVKT-KNOB is compatible with the MACOM kit, offering seamless connection and operation of the MagAlpha and allowing users to evaluate MagAlpha functionalities and performances, such as noise level, refresh rate, power-up time, magnetic field dependence, and so on

$50.00 + tax


Evaluation Kit

GET THIS KIT

Kit details

The EVKT-MACOM is a communication kit for the MagAlpha magnetic position sensor family. The EVKT-MACOM offers a seamless connection and operation with MagAlpha test boards (TBMA) and evaluation kits (EVKT-KNOB). The kit contains a microcontroller motherboard, a collection of daughter boards adapted to different sensor boards and the related cables.

$75.00 + tax