AS5030-ATSU austriamicrosystems, AS5030-ATSU Datasheet - Page 39

• Manufacturer Part Number: AS5030-ATSU
• Description: IC ENCODER ROTARY 8-BIT 16-TSSOP
• Manufacturer: austriamicrosystems
• Type: Linear, Rotary Encoder - Programmabler

Specifications of AS5030-ATSU

• Sensing Range: 23.6mT ~ 44.5mT
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 14mA
• Current - Output (max): 4mA
• Output Type: Digital, PWM
• Features: Programmable
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AS5030
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
Figure 34. Typical Error Curve of INL Error Over Lateral Displacement (including quantization error)
8.9.3 Magnet Size
Figure 32
poles are closer together, the linear range will also be smaller and consequently the tolerance for lateral misalignment will also be smaller.
If the ± 0.25mm lateral misalignment radius (rotation axis to IC package center) is too tight, a larger magnet can be used. Larger magnets have
a larger linear range and allow more misalignment. However at the same time the slope of the magnet is more flat which results in a lower
differential amplitude.
This requires either a stronger magnet or a smaller gap between IC and magnet in order to operate in the amplitude-controlled area (AGC > 0
and AGC < 63).
In any case, if a magnet other than the recommended 6mm diameter magnet is used, two parameters should be verified:
Note: For preferred magnet suppliers, please refer to the austriamicrosystems website (Rotary Encoder section).
www.austriamicrosystems.com/AS5030
Verify that the magnetic field produces a sinusoidal wave, when the magnet is rotated. Note that this can be done with the SIN-/COS-
outputs of the AS5030, e.g. rotate the magnet at constant speed and analyze the SIN- (or COS-) output with an FFT-analyzer.
It is recommended to disable the AGC for this test.
Verify that the B
the SIN- or COS- output of the AS5030 may also be used together with an X-Y- table to get a B
sinewave tests described above may be re-run at defined X-and Y- misplacements of the magnet to determine the maximum acceptable
lateral displacement range.
It is recommended to disable the AGC for both these tests.
INL [°]
to
Figure 34
5,000
4,500
4,000
3,500
3,000
2,500
z
2,000
-Curve between the poles is as linear as possible. This curve may be available from the magnet supplier(s). Alternatively,
1,500
in this chapter describe a cylindrical magnet with a diameter of 6mm. Smaller magnets may also be used, but since the
1,000
0,500
0,000
X Displacem e nt [µm ]
-1000
-750
-500
INL vs. Displacement: AS5030 for AGC24
-250
0
250
500
Revision 2.1
750
1000
-1000
- 750
-500
-250
0
250
Y Displacem ent [µm ]
500
750
z
-scan of the magnet. Furthermore, the
1000
4,500-5,000
4,000-4,500
3,500-4,000
3,000-3,500
2,500-3,000
2,000-2,500
1,500-2,000
1,000-1,500
0,500-1,000
0,000-0,500
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