AS5055-EQFT austriamicrosystems, AS5055-EQFT Datasheet - Page 19

• Manufacturer Part Number: AS5055-EQFT
• Description: IC ENCODER ROTARY 16-QFN
• Manufacturer: austriamicrosystems
• Type: Linear, Rotary Encoder - Programmabler

Specifications of AS5055-EQFT

• Sensing Range: 30mT ~ 80mT
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 8.5mA
• Output Type: Digital
• Features: Low Power
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 16-VQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output (max): -
• Other names: AS5055-EQFTCT

AS5055
Data Sheet – Placement of the Magnet
12 Placement of the Magnet
12.1 Non-Linearity Error over Displacement
As shown in Figure 17, the recommended horizontal position of the magnet axis is over the diagonal center of the IC.
Figure 16 shows a typical error curve at a vertical magnet distance of 1.0mm, measured with a NdFeB N35H magnet
with 6mm diameter and 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 Figure 16, the accuracy for a centered magnet is better than
0.5°. Within a radius of 0.5mm, the accuracy is abo ut 1.0° (spec = 1.41° over temperature).
Figure 16. Integral Non-Linearity over Displacement of the Magnet
www.austriamicrosystems.com
INL [° ]
3,5
4
2,5
3
1,5
0,5
2
1
0
X-displacement [mm]
Revision 1.2
Non-Linearity @ z=1mm
-1,0
-0,7
-0,4
-0,1
0,2
0,5
Y-displacement [mm]
0,8
3,5-4
3-3,5
2,5-3
2-2,5
1,5-2
1-1,5
0,5-1
0-0,5
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