AM256 - RLS d.o.o. rotary and linear motion sensors (encoders)

Overview

Introduction

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 AM256 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 eight bit flash interpolator.

The absolute angle position value from the interpolator is output through a parallel binary interface or a serial SSI interface. The relative changes of angle position are output through incremental A QUAD B encoder signals. The resolution of incremental output is selectable between 128 and 256 counts per turn with an external pin.

Sample kits: RMK2

AM256 Rotary Magnetic Encoder IC on a PCB with all necessary components and a magnet, delivered in an antistatic box.

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

Features

Contactless angular position encoding over 360°
Ideal for harsh environments due to magnetic sensing
Complete system-on-chip solution
8 bit absolute encoder
Output options:
- Incremental
- Parallel
- Serial SSI
- Analogue sinusoidal
Factory optimised linearity
High rotational speed up to 60,000 rpm
5 V power supply
Low power consumption. 13 mA typical.
Extended operating temperature range (-40 °C to 125 °C)
SMD package SSOP28

Documentation

Doc. no.	Issue	Description	Type	Size
AM256D01	10	AM256 Data sheet	PDF File	578 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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AM256KIT (1 chip + 1 magnet free of charge)
RMK2 (AM256 evaluation board + 1 magnet free of charge) recommended

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AM256 - 8 bit rotary magnetic encoder chip