as5040 austriamicrosystems, as5040 Datasheet - Page 22

• Manufacturer Part Number: as5040
• Description: 10-bit Programmable Magnetic Rotary Encoder
• Manufacturer: austriamicrosystems

AS5040 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER
Revision 1.8
-0.1
-0.2
-0.3
-0.4
-0.5
0.5
0.4
0.3
0.2
0.1
Figure 24: Example of linearity error over XY misalignment
0
1
Figure 25: Example of linearity error over 360°
6
°
5
4
3
2
55
1
0
109
Linearity Error over XY-misalignment [°]
163
y
217
271
linearity error with centered magnet [degrees]
325
Err
-1000
-800
m ax
379
-600
-400
-200
0
200
400
433
600
x
800
1000
487
www.austriamicrosystems.com
541
Err
595
m in
The maximum non-linearity error on this example is
better than ±1 degree (inner circle) over a misalignment
radius of ~0.7mm. For volume production, the placement
tolerance of the IC within the package (±0.235mm) must
also be taken into account.
The total nonlinearity error over process tolerances,
temperature and a misalignment circle radius of 0.25mm
is specified better than ±1.4 degrees.
The magnet used for this measurement was a cylindrical
NdFeB (Bomatec® BMN-35H) magnet with 6mm diameter
and 2.5mm in height.
649
703
757
transition noise
811
865
919
973
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