AS5045ASST 查看數據表（PDF） - austriamicrosystems AG

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AS5045ASST

12 Bit Programmable Magnetic Rotary Encoder

austriamicrosystems AG 

AS5045

12 Bit Programmable Magnetic Rotary Encoder

Data Sheet

1 General Description

3 Key Features

The AS5045 is a contactless magnetic rotary encoder

ƒ Contactless high resolution rotational position

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

lid in a single device.

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

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

a magnet may be placed above or below the IC.

The absolute angle measurement provides instant

v indication of the magnet’s angular position with a

resolution of 0.0879° = 4096 positions per revolution.

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

as a PWM signal.

t An internal voltage regulator allows the AS5045 to

operate at either 3.3 V or 5 V supplies.

G s 2 Benefits

A t ƒ Complete system-on-chip

s n ƒ Flexible system solution provides absolute and

PWM outputs simultaneously

m te ƒ Ideal for applications in harsh environments due to

contactless position sensing

a l con ƒ No calibration required

encoding over a full turn of 360 degrees

ƒ Two digital 12bit absolute outputs:

- Serial interface and

- Pulse width modulated (PWM) output

ƒ User programmable zero position

ƒ Failure detection mode for magnet placement

monitoring and loss of power supply

ƒ “red-yellow-green” indicators display placement of

magnet in Z-axis

ƒ Serial read-out of multiple interconnected AS5045

devices using Daisy Chain mode

ƒ Tolerant to magnet misalignment and airgap

variations

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

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

4 Applications

ƒ Industrial applications:

- Contactless rotary position sensing

- Robotics

ƒ Automotive applications:

- Steering wheel position sensing

- Transmission gearbox encoder

- Headlight position control

- Torque sensing

- Valve position sensing

ƒ Replacement of high end potentiometers

Technica Figure 1. Typical Arrangement of AS5045 and Magnet

www.austriamicrosystems.com

Revision 1.7

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