MA310 Contactless Angle Sensor QFN-16

MA310 Contactless Angle Sensor QFN-16

The MA310 detects the absolute angular position of a permanent magnet, typically a diametrically magnetized cylinder on a rotating shaft.

Key Specifications

Features

• 12-Bit Resolution Absolute Angle Encoder
• 15mT Minimum Magnetic Field
• SPI Serial Interface for Digital Angle Readout and Chip Configuration
• Incremental 10-Bit ABZ Quadrature Encoder Interface with Programmable Pulses Per Turn from 1 to 256
• UVW Interface with 1 to 8 Pole Pair Emulation
• Programmable Magnetic Field Strength Detection for Diagnostic Checks
• 3.3V, 12mA Supply
• -40°C to +125°C Operating Temperature
• Available in a QFN-16 (3mmx3mm) Package

Typical Application Circuit

Applications

• Brushless DC Motor Servo Drives
• Motor Commutation
• Motor Speed and Position Control

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