AS5304 datasheet(18/31 Pages) AMSCO

Part #	AS5304

Description	Integrated Hall ICs for Linear and Off-Axis Rotary Motion Detection

PDF	31 Pages

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Manufacturer	AMSCO [ams AG]

Direct Link	http://www.ams.com

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Page 18

ams Datasheet

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[v2-00] 2017-May-03

AS5304/AS5306 − Detailed Description

Dynamic Non-Linearity (DNL)

The DNL (dynamic non-linearity) describes the non-linearity of

the incremental outputs from one step to the next. In an ideal

system, every change of the incremental outputs would occur

after exactly one LSB (e.g. 25μm on AS5304). In practice

however, this step size is not ideal, the output state will change

after 1LSB ±DNL. The DNL must be < ±½ LSB to avoid a missing

code. Consequently, the incremental outputs will change when

the magnet movement over the IC is minimum 0.5 LSB and

maximum 1.5 LSBs.

Figure 18:

DNL of AS5304 (left) and AS5306 (right)

1 LSB+DNL

1 LSB-DNL

1LSB

lateral magnet movement

37.5µm

25µm

12.5µm

AS5304:

DNL (dynamic non-linearity

1 LSB+DNL

1 LSB-DNL

1LSB

lateral magnet movement

22.5µm

15µm

7.5µm

AS5306:

DNL (dynamic non-linearity

AS5304 Datasheet(PDF) 18 Page - ams AG