MA102 MagAlpha MA102 Motor Commutation Angle Sensor QFN-16

MA102 MagAlpha MA102 Motor Commutation Angle Sensor QFN-16

The MagAlpha MA102 magnetic sensor is an all-in-one solution designed to replace Hall switches for commutation in brushless DC motors and to provide absolute angle position.

Key Specifications

Features

• 12-Bit Repeatability of UVW Outputs
• Contactless Sensing for Long Life
• SPI Serial Interface for 8-Bit Angle Readout and Chip Configuration
• UVW Signals for Block Commutation with 1 to 8 Pole Pair Emulation Using a 2-Pole Magnet, Complement /UVW Signals Provided for Differential Signaling
• Programmable Magnetic Field Strength Detection for Diagnostic Checks
• Linearization for Side-Shaft Mounting
• 3.3V, 12mA Supply
• -40°C to +125°C Operating Temperature
• Available in a QFN-16 (3mmx3mm) Package

Typical Application Circuit

Applications

• BLDC Motor Commutation Drives
• BLDC Motor Servo

Design Notes

• Mechanical tolerance between the magnet and the sensing element translates directly into angle error; budget it before choosing the resolution.
• Match the output interface (SPI, ABZ, PWM or analog) to the MCU timing, including the latency the control loop can tolerate.
• Offset and sensitivity drift over temperature are systematic — a single-point calibration at room temperature will not hold over the operating range.
• Differential or digital outputs survive electrically noisy motor environments far better than single-ended analog ones.

Common Questions