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AS5130

Datasheet - Application In form atio n

Figure 26. Typical INL Error over 360º

Figure 26 shows a typical example of an error curve over a full turn of 360º at a given X-Y- displacement. The curve includes the quantization

error, transition noise and the system error. The total error is ~2.2º peak/peak (+/-1.1º).

The sawtooth-like quantization error (see Figure 25) can be reduced by averaging, provided that the magnet is in constant motion and there are

an adequate number of samples available. The solid bold line in Figure 26 shows the moving average of 16 samples. The INL (intrinsic non-

linearity) is reduced to from ~+/- 1.1º down to ~ +/-0.3º. The averaging however, also increases the total propagation delay, therefore it may be

considered for low speeds only or adaptive; depending on speed (see Position Error Over Speed: on page 21).

INL including quantization error

-1,5

-1

-0,5

0

0,5

1

1,5

0

45

90

135

180

225

270

315

360

Angle steps

INL

Average (16x)