AM512B - 9 bit rotary magnetic sensor chip

The AM512B is a compact solution for angular position sensing.

Overview

Introduction

AM512B

The IC senses the angular position of a permanent magnet placed above the chip. The permanent magnet must be diametrically polarized and of cylindrical shape.

The AM512B uses Hall sensor technology to detect the magnetic flux density distribution at the surface of the silicon. Hall sensors are placed in a circular array around the center of the IC and deliver a voltage representation of magnetic field distribution.

The sine and cosine voltage outputs from the sensor array vary with magnet position. The sine and cosine signals are then converted to absolute angle position with a fast nine bit flash interpolator.

The absolute angle position value from the interpolator is output through a parallel binary interface or a serial SSI interface or a linear voltage output. The relative changes of angle position are output through incremental A QUAD B encoder signals. The resolution of incremental output is 512 counts per turn.


Sample kits: RMK1B

RMK1B

AM512B Rotary Magnetic Encoder IC on a PCB with all necessary components and a magnet, delivered in an antistatic box.

Outputs: Parallel, SSI, Incremental, Linear Voltage, Unbuffered Sine/Cosine

Features

  • Contactless angular position encoding over 360°
  • Ideal for harsh environments due to magnetic sensing
  • Complete system-on-chip solution
  • 9 bit absolute encoder
  • Output options:
    • Incremental
    • Parallel
    • Serial SSI
    • Analogue linear
  • Factory optimised linearity
  • High rotational speed up to 30,000 rpm
  • 5 V power supply
  • Low power consumption. 20 mA typical.
  • Extended operating temperature range (-40 °C to 125 °C)
  • SMD package LQFP44

Documentation

Doc. no. Issue Description Type Size
AM512BD01 4 AM512B Data sheet PDF File 608 KB

Sample request

RLS offers free component samples to qualified OEM customers and professional design engineers. Please note that RLS will qualify each request and limit the number of units provided free of charge to each customer.

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