Monolithic Power Systems (MPS) MagAlpha™ MA780 Low-Power Angle Sensor

Monolithic Power Systems (MPS) MagAlpha™ MA780 Low-Power Angle Sensor is used to detect the absolute angular position of a permanent magnet. For example, a diametrically magnetized cylinder on a rotating shaft. This sensor, with its power-cycling ability, is suitable for applications requiring low average power. The timing can be controlled via an on-chip clock or external controller. Flags are available for detecting a definable amount of angle change. The MA780 supports a wide range of magnetic field strengths and spatial configurations. Both end-of-shaft and off-axis (side-shaft mounting) configurations are supported. On-chip, non-volatile memory (NVM) provides storage for configuration parameters, including the reference zero angle position, power-cycling parameters, and the filter window affecting the output resolution.

The Monolithic Power Systems (MPS) MagAlpha MA780 Low-Power Angle Sensor is available in a 3mm x 3mm QFN-16 package.

Features

  • 8-bit to 12-bit resolution absolute contactless angle encoder
  • 1µA current consumption in idle mode
  • 10mA current consumption in active mode
  • Internal or external power-cycling control
  • Warning on change flags
  • SPI serial interface for digital angle readout and chip configuration
  • 3.3V supply
  • -40°C to +125°C operating temperature
  • Available in a QFN-16 (3mm x 3mm) package

Applications

  • General-purpose angle measurement
  • Battery-powered devices
  • Multi-turn encoders
  • Low-power rotary knob interfaces

Videos

Typical Application Circuit

Application Circuit Diagram - Monolithic Power Systems (MPS) MagAlpha™ MA780 Low-Power Angle Sensor

Monolithic Power Systems (MPS) MagAlpha™ MA780 Low-Power Angle Sensor