MAQ473 MagAlpha Automotive Angle Sensor QFN-16

MAQ473 MagAlpha Automotive Angle Sensor QFN-16

The MAQ473 detects the absolute angular position of a permanent magnet, typically a diametrically magnetized cylinder on a rotating shaft.

Key Specifications

Features

• 9-Bit to 14-Bit Resolution Absolute Angle Encoder
• Contactless Sensing for Long Lifespan
• SPI Serial Interface with Parity Bit for Angle Readout and Chip Configuration
• Configuration Programmable Magnetic Field Strength Detection for Diagnostic Checks
• Incremental 12-Bit ABZ Quadrature Encoder Interface with Programmable Pulses Per Turn from 1 to 1024
• 14-Bit PWM Output
• 3.3V, 12mA Supply Current
• -40°C to +150°C Operating Temperature
• Available in a QFN-16 (3mmx3mm) Package with Wettable Flanks
• Available in AEC-Q100 Grade 1

Typical Application Circuit

Applications

• Automotive
• Angle Encoders
• Automotive Angle or Speed Sensors

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