8-Bit, Contactless, Angle Encoder with PWM Output and Push Button Function
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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.
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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
Active Part Numbers:
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.
Round Eval Board for MA850
Long Eval Board for MA850
Windows Desktop Application + Drivers for the MagAlpha Communication Kit.