as5145 austriamicrosystems, as5145 Datasheet

as5145

Manufacturer Part Number

as5145

Description

12 Bit Programmable Magnetic Rotary Encoder

Manufacturer

austriamicrosystems

Datasheet

1.AS5145.pdf (1 pages)

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Download datasheet (73Kb)

AS5145 12-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER

1 General Description

The AS5145 is a contactless magnetic rotary encoder for

accurate angular measurement over a full turn of 360°.

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

elements, analog front end and digital signal processing

in a single device.

To measure the angle, only a simple two-pole magnet,

rotating over the center of the chip, is required. The

magnet may be placed above or below the IC.

The absolute angle measurement provides instant

indication of the magnet’s angular position with a

resolution of 0.0879° = 4096 positions per revolution.

This digital data is available as a serial bit stream and as

a PWM signal.

An internal voltage regulator allows the AS5145 to

operate at either 3.3 V or 5 V supplies.

Figure 1: Arrangement of AS5145 and magnet

Figure 2: Block Diagramm

Revision 1.0

AS5145

12 BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER

www.austriamicrosystems.com

2 Key Features

−

3 Applications

The device is ideal for motor controls like encoder

feedback or current sense, motion control such as

robotics, sonar, or for any other radio frequency

identification.

Contactless high resolution rotational position

encoding over a full turn of 360 degrees

Two digital 12bit absolute outputs:

Three incremental outputs

Quadratur A/B ( 10- or 12-bit) and Index

output signal

User programmable zero position

Failure detection mode for magnet placement

monitoring and loss of power supply

“red-yellow-green” indicators display placement of

magnet in Z-axis

Serial read-out of multiple interconnected AS5145

devices using Daisy Chain mode

Tolerant to magnet misalignment and airgap

variations

Wide temperature range: - 40°C to + 150°C

Small Pb-free package: SSOP 16 (5.3mm x 6.2mm)

- Serial interface

- Pulse width modulated (PWM) output

FACT SHEET

Page 1 of 1

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