AS5043

Data Sheet – 10-bit Absolute Synchronous Serial Interface (SSI)

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Revision 1.80

7 – 36

8.2

Z-Axis Range Indication (Push Button Feature, Red/Yellow/Green Indicator)

The AS5043 provides several options of detecting movement and distance of the magnet in the vertical (Z-) direction.

Signal indicators MagINC, MagDEC and LIN are available as status bits in the serial data stream, while MagRngn is an

open-drain output that indicates an out-of range status (on in YELLOW or RED range). Additionally, the analog output

provides a safety feature in the form that it will be turned off when the magnetic field is too strong or too weak (RED

range). The serial data is always available, the red/yellow/green status is indicated by the status bits as shown below:

Table 3: Magnetic Field Strength Indicators

SSI Status Bits

Hardware Pins

Mag

INC

Mag

DEC

LIN

Mag

Rngn

Analog

Output

Description

0

0

0

Off

enabled

No distance change

Magnetic Input Field OK (GREEN range, ~45…75mT)

0

1

0

Off

enabled

Distance increase, GREEN range; Pull-function. This state is dynamic and only

active while the magnet is moving away from the chip.

1

0

0

Off

enabled

Distance decrease, GREEN range; Push- function. This state is dynamic and only

active while the magnet is moving towards the chip.

1

1

0

On

enabled

YELLOW Range: Magnetic field is ~ 25…45mT or ~75…135mT. The AS5043 may

still be operated in this range, but with slightly reduced accuracy.

1

1

1

On

disabled

RED Range: Magnetic field is ~<25mT or >~135mT. The analog output will be

turned off in this range by default. It can be enabled permanently by OTP

programming (see 11.1.2).

It is still possible to use the absolute serial interface in the red range, but not

recommended.