Rev. n/c

Page 1/11

Feb 2001

Key Features

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Up to 64 positions within 360

°

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Non contact switching

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Simple magnet as rotary encoder

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Zero position programmable (independent of

magnet orientation)

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Synchronous Serial Interface (SSI)

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Cascading is possible

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Chip Select Input

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Small 8-Pin SOIC (SMT) Package

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Temperature Range: -40

°C ...+85°C

General Description

The device provides the absolute angular position of a simple magnet that is placed under or

above the device’s surface. The device includes the Hall Sensor Array, signal conditioning and

post processing needed to generate a 6-bit binary code. The binary code can be easily

accessed by a Synchronous Serial Interface (SSI). The angle between the device and the

magnetic polarisation axis is exactly represented by one of 64 sectors (of 5.625

° each) in the

full 360

° range. Zero-Position Programming allows one time programming of a specific zero

position between the device and the magnet. The initial zero position is shown below.

6-BIT MAGNETIC

ANGULAR POSITION ENCODER

WITH SERIAL INTERFACE

α

S

N

4mm

0... initial

32

16

48

8

24

40

56

4

12

20

28

36

44

52

60

Ordering Information

Part Number Package

AS5020

SOIC 8

AS5020T

SOIC8 Tape and Reel

Functional Block Diagram