MA820 MagAlpha MA820 8-Bit Contactless Angle Encoder QFN-16

MA820 MagAlpha MA820 8-Bit Contactless Angle Encoder QFN-16

The MA820 is an easy-to-use, magnetic, angle encoder designed to replace analogic potentiometers or rotary switches.

Key Specifications

Features

• 8-Bit Resolution Absolute Angle Encoder
• Contactless Sensing for Long Life with No Wear
• SPI Serial Interface for Chip Configuration
• Incremental ABZ Encoder Interface with 1 - 64 Programmable Pulses Per Channel
• Programmable Magnetic Field Strength Detection for Push/Pull Button Detection
• 3.3V, 12mA Supply
• -40 to +125°C Operating Temperature
• Available in a QFN-16 (3mmx3mm) Package

Typical Application Circuit

Applications

• Rotary Knob Control Interfaces
• Manual Controls
• Encoders
• Automotive

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