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AS5043
Data Sheet – 10-bit Absolute Synchronous Serial Interface (SSI)
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
0
0
1
1
Mag
DEC
0
1
0
1
LIN
0
0
0
0
Mag
Rngn
Off
Off
Off
On
Analog
Output
enabled
enabled
enabled
enabled
Description
No distance change
Magnetic Input Field OK (GREEN range, ~45…75mT)
Distance increase, GREEN range; Pull-function. This state is dynamic and only
active while the magnet is moving away from the chip.
Distance decrease, GREEN range; Push- function. This state is dynamic and only
active while the magnet is moving towards the chip.
YELLOW Range: Magnetic field is ~ 25…45mT or ~75…135mT. The AS5043 may
still be operated in this range, but with slightly reduced accuracy.
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
1
1
1
On
disabled
programming (see 11.1.2).
It is still possible to use the absolute serial interface in the red range, but not
recommended.
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