MA735 Contactless Angle Sensor QFN-14

MA735 Contactless Angle Sensor QFN-14

The MA735 detects the absolute angular position of a permanent magnet, typically a diametrically magnetized cylinder on a rotating shaft.

Key Specifications

Features

• 9-Bit to 13-Bit, ±3σ Resolution Absolute Angle Encoder
• Contactless Sensing for Long Life
• SPI Serial Interface for Digital Angle Readout and Chip Configuration
• Incremental 12-Bit ABZ Quadrature Encoder Interface with Configurable Pulses per Turn from 1 to 1024
• 14-Bit Pulse-Width Modulation (PWM) Output
• Configurable Magnetic Field Strength Detection for Diagnostics
• 3.3V, 12mA Supply
• -40°C to +125°C Operating Temperature Range
• Available in an Ultra-Small UTQFN-14 (2mmx2mm) Package

Typical Application Circuit

Applications

• General-Purpose Angle Measurements
• High-Resolution Angle Encoders
• Automotive Angle Sensing

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