as5050 austriamicrosystems, as5050 Datasheet - Page 17

• Manufacturer Part Number: as5050
• Description: Low Power 10-bit Magnetic Rotary Encoder
• Manufacturer: austriamicrosystems

AS5050
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
Daisy Chain, 4 Wire.
Figure 15. Daisy Chain, 4-Wire
8.2 Placement of the Magnet
Non-Linearity Error over Displacement.
As shown in
Figure 16
2.5mm height.
The X- and Y- axis of the graph indicate the lateral displacement of the magnet center with respect to the IC center.
At X = Y = 0, the magnet is perfectly centered over the IC. The total displacement plotted on the graph is for ±1mm in both directions.
The Z-axis displays the worst case INL error over a full turn at each given X-and Y- displacement. The error includes the quantization error of ±½
LSB. At the sample shown in
1.0° (spec = 1.41° over temperature).
www.austriamicrosystems.com
UC
shows a typical error curve at a vertical magnet distance of 1.0mm, measured with a NdFeB N35H magnet with 6mm diameter and
Figure
MOSI
MISO
SCK
SS/
17, the recommended horizontal position of the magnet axis is over the diagonal center of the IC.
1
1
1
MOSI
MISO
MOSI
MISO
MOSI
MISO
SCK
SS/
Wire_Mode
SCK
SS/
Wire_Mode
SCK
SS/
Wire_Mode
Figure
AS5050
AS5050
AS5050
16, the accuracy for a centered magnet is better than 0.5°. Within a radius of 0.5mm, the accuracy is about
III
II
I
UC MOSI
UC MOSI
UC MISO
UC MISO
SS/
SS/
Read angle 3
Write CMD
SW reset
0xFFFF
...
Read angle 2
Write CMD
SW reset
0 xFFFF
Revision 1.12
Read angle 1
Write CMD
SW reset
0xFFFF
Read angle 3
0xFFFF
Angle 3
Read angle 2
0xFFFF
Angle 2
Read angle 1
Angle 1
0xFFFF
Angle 3
...
Angle 2
...
Angle 1
...
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