MA820
8-Bit Contactless Angle Encoder with ABZ Output and Push Button Function
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The MA820 is an easy-to-use, magnetic, angle encoder designed to replace analogic potentiometers or rotary switches. In contrast to most other MagAlpha parts, the MA8XX series is targeted towards human-machine interface applications rotating at a maximum of 200 rpm. The sensor detects the absolute angular position of a permanent magnet attached to a rotating shaft and outputs incremental ABZ encoder data. The number of pulses per channel for each A or B output is programmable from 1 to 64 via an SPI interface.
Magnet shapes and configurations are very flexible. Typically, the MA820 is used with a diametrically magnetized cylinder of 2 - 8mm in diameter.
The MA820 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 configuration parameters, including the reference zero angle position, ABZ pulses per channel, and 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
- Incremental ABZ Encoder Interface with 1-64 Programmable Pulses Per Channel
- Programmable Magnetic Field Strength Detection for Push/Pull Button Detection
- 3.3V, 11mA Supply
- -40 to +125°C Operating Temperature
- Available in a QFN-16 (3mmx3mm) Package
Additional Resources
AppNote: Selecting the Right Magnet
Parametrics
- 封装QFN-16 (3x3)
- Vin (min) (V)3
- Vin (max) (V)3.6
- fcutoff (Hz)200
- Latency (µs)2000
- Isupply (mA)11.7
- tstart-up (ms)20
- GradeCatalog
- Refresh Rate (kHz)1000
- Output FormatABZ, SPI, A͞B͞Z
- Resolution (bits)8
- Sensor PositionEnd-of-Shaft
- ABZ Pulses per Turn per Channel1 to 64
- Temp Range (°C)-40 to +125
- Magnetic Field DetectionYes
- Magnetic Field (Min) (mT)30
Evaluation Kit
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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.
US$ 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.
US$ 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
US$ 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.
US$ 75.00 + tax
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