AS5130-ASST austriamicrosystems, AS5130-ASST Datasheet - Page 36

• Manufacturer Part Number: AS5130-ASST
• Description: IC ENCODER ROTORY 8-BIT 16-SSOP
• Manufacturer: austriamicrosystems
• Type: Linear, Rotary Encoder - Programmabler

Specifications of AS5130-ASST

• Sensing Range: 32mT ~ 75mT
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 24mA
• Output Type: Analog, Ratiometric
• Features: Programmable
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output (max): -
• Other names: AS5130-ASSTTR

AS5130
Data Sheet - A p p l i c a t i o n I n f o r m a t i o n
Figure 31. Typical Error Curve of INL Error Over Lateral Displacement (including quantization error)
8.4.6 Magnet Size
Figure 29
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/AS5130
Verify, that the magnetic field produces a sinusoidal wave, when the magnet is rotated. Note that this can be done with the SIN-/COS- out-
puts of the AS5130; e.g. rotate the magnet at constant speed and analyze the SIN- (or COS-) output with an FFT-analyzer. It is recom-
mended to disable the AGC for this test
Verify that the B
Alternatively, the SIN- or COS- output of the AS5130 may also be used together with an X-Y- table to get a B
Figure 29
to determine the maximum acceptable lateral displacement range. It is recommended to disable the AGC for both these tests
Sin/Cos Outputs with External Interpolator on page
to
INL [°]
Figure 31
5,000
or
4,500
4,000
Figure
3,500
3,000
z
2,500
-Curve between the poles is as linear as possible
2,000
1,500
illustrate a cylindrical magnet with a diameter of 6mm. Smaller magnets may also be used, but since the poles are closer
1,000
0,500
30). Furthermore, the sinewave tests described above may be re-run at defined X-and Y- misplacements of the magnet
0,000
X Displacem ent [µm ]
-1000
-750
-500
INL vs. Displacement: AS5030 for AGC24
(see Analog Sin/Cos Outputs with External Interpolator on page
-250
0
13).
250
500
Revision 1.11
750
(see Figure
1000
-1000
29). This curve may be available from the magnet supplier(s).
-750
-500
-250
0
250
Y Displacem ent [µm ]
500
750
1000
13).
z
-scan of the magnet (as in
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
(see Analog
36 - 41