AS5030 8-bit Programmable Magnetic Rotary Encoder

Rev. 1.8

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Page 23 of 33

4~400ms. At sampling intervals >400ms, the power cycling mode is the best method to minimize the average current

consumption.

The curves are based on the figures given in 8.1.

AS5030 average current consumption

0,0

0,5

1,0

1,5

2,0

2,5

3,0

3,5

4,0

4,5

5,0

1

10

100

1000

sampling interval [ms]

Low Power Mode

Power Cycling Mode

Ultra Low Power Mode

Figure 27: Average current consumption of reduced power modes

9 Accuracy of the Encoder system

This chapter describes which individual factors influence the accuracy of the encoder system and how to improve them.

Accuracy is defined as the difference between measured angle and actual angle. This is not to be confused with resolution,

which is the smallest step that the system can resolve.

The two parameters are not necessarily linked together. A high resolution encoder may not necessarily be highly accurate as

well.

9.1

Quantization error

There is however a direct link between resolution and accuracy, which is the quantization error:

Figure 28: Quantization error of a low resolution and a high resolution system