AS5045TR View Datasheet(PDF) - austriamicrosystems AG
Part Name
Description
MFG CO.
'AS5045TR' PDF : 34 Pages View PDF
AS5045
Data Sheet
7 Functional Description
The AS5045 is manufactured in a CMOS standard process and uses a spinning current Hall technology for sensing
the magnetic field distribution across the surface of the chip.
The integrated Hall elements are placed around the center of the device and deliver a voltage representation of the
magnetic field at the surface of the IC.
Through Sigma-Delta Analog / Digital Conversion and Digital Signal-Processing (DSP) algorithms, the AS5045
provides accurate high-resolution absolute angular position information. For this purpose a Coordinate Rotation
Digital Computer (CORDIC) calculates the angle and the magnitude of the Hall array signals.
lid The DSP is also used to provide digital information at the outputs MagINCn and MagDECn that indicate
movements of the used magnet towards or away from the device’s surface.
A small low cost diametrically magnetized (two-pole) standard magnet provides the angular position information (see
a Figure 17).
The AS5045 senses the orientation of the magnetic field and calculates a 12-bit binary code. This code can be
v accessed via a Synchronous Serial Interface (SSI). In addition, an absolute angular representation is given by a
Pulse Width Modulated signal at pin 12 (PWM). This PWM signal output also allows the generation of a direct
ill proportional analogue voltage, by using an external Low-Pass-Filter.
The AS5045 is tolerant to magnet misalignment and magnetic stray fields due to differential measurement technique
t and Hall sensor conditioning circuitry.
Technicaaml scoAnGtent s Figure4. AS5045BlockDiagram
www.austriamicrosystems.com
Revision 1.7
12 – 33
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