AS5040 View Datasheet(PDF) - austriamicrosystems AG

Part Name

Description

Manufacturer

AS5040

10-Bit 360º Programmable Magnetic Rotary Encoder

austriamicrosystems AG 

This alarm may be resolved by bringing the magnet within

the X-Y-Z tolerance limits.

LIN (Linearity Alarm), logic high indicates that the input

field generates a critical output linearity. When this bit is

set, the data at D9:D0 may still be used, but can contain

invalid data. This warning may be resolved by bringing the

magnet within the X-Y-Z tolerance limits.

MagINCn, (Magnitude Increase) becomes HIGH, when the

magnet is pushed towards the IC, thus the magnetic field

strength is increasing.

MagDECn, (Magnitude Decrease) becomes HIGH, when the

magnet is pulled away from the IC, thus the magnetic field

strength is decreasing.

Both signals HIGH indicate a magnetic field that is out of the

allowed range (see Figure 22).

Figure 22:

Magnetic Magnitude Variation Indicator

Mag

INCn

0

0

1

1

Mag

DECn

0

1

0

1

Description

No distance change; Magnetic input field OK (in range, 45mT to 75mT)

Distance increase: Pull-function. This state is dynamic, it is only active while the

magnet is moving away from the chip in Z-axis

Distance decrease: Push- function. This state is dynamic, it is only active while the

magnet is moving towards the chip in Z.-axis.

Magnetic Input Field invalid – out of range: <45mT or >75mT (or missing magnet)

Note(s):

1. Pins 1 and 2 (MagINCn, MagDECn) are open drain outputs and require external pull-up resistors. If the magnetic field is in range,

both outputs are turned OFF.

ams Datasheet

[v2-12] 2017-Jun-20

Page 19

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