AS5046 Programmable 360° Magnetic Angle Encoder

Revision 1.0

www.austriamicrosystems.com

Page 1 of 2

General Description

The AS5046 is a contactless magnetic angle encoder for

accurate measurement up to 360°.

It is a system-on-chip, combining integrated Hall elements,

analog front end and digital signal processing in a single

device.

The AS5046 provides a digital serial 12-bit as well as a

programmable 10-bit ratiometric analog output that is

directly proportional to the angle of a magnet, rotating over

the chip.

In addition, the serial interface enables a user configurable

arrangement of the Hall array and allows access to each

individual Sensor of the Hall Array.

The AS5046 also provides high resolution information of

the magnetic field strength, respectively the vertical

distance of the magnet, thus adding excellent state-of-

health information of the overall system.

An internal voltage regulator allows operation of the

AS5046 from 3.3V or 5.0V supplies.

Typical arrangement of AS5046 and magnet

Benefits

•

Complete system-on-chip

•

High reliability due to non-contact sensing

•

Bi-directional 2-wire interface

•

Programmable ratiometric analog output

•

Ideal for application s in harsh environments

•

Robust system, tolerant to magnet

misalignment, airgap variations, temperature

variations and external magnetic fields

Key Features

• 360° contactless high resolution angular position encoding

• User programmable zero position

• 12-bit 2-wire serial interface

• Versatile analog output

programmable angular range up to 360°

programmable ratiometric output voltage range

• High resolution magnet distance indication

256 steps within recommended range (~0.5 to 1.8mm)

256 steps over extended range (~0 to 5mm)

• Mode input for optimizing noise vs. speed

• Alignment mode for magnet placement guidance

• Wide temperature range: - 40°C to + 125°C

• Small package: SSOP 16 (5.3mm x 6.2mm)

Applications

The AS5046 is ideal for applications that require high

resolution, a minimum of wires between controller and

sensor and where the vertical distance of the magnet is of

importance:

•

Remote sensors

•

Rotate-and-push manual input devices

•

Joysticks

•

Applications with extended safety requirements

regarding magnet distance

AS5046 block diagram

DATA SHEET

AS5046

PROGRAMMABLE 12-bit 360° MAGNETIC ANGLE ENCODER

WITH ABSOLUTE 2-WIRE SERIAL AND ANALOG INTERFACES

PRELIMINARY FACT SHEET

DSP

Hall Array

&

Frontend

Amplifier

OTP

Register

Programming

Parameters

Sin

Cos

Ang

Mag

MagRNGn

Mode

CSn

SCL

FB

Vout

Prog_DI

SDA

10bit

DAC

+

-

10

DACout

DACref

12

8

12

14-bit

ADC

14-bit

ADC

Hall

Sensor

switch

matrix

12

12

8

Range

preselect

Absolute

Interface

(I²C)

AGC

8

AS5046