as5043 austriamicrosystems, as5043 Datasheet - Page 5

• Manufacturer Part Number: as5043
• Description: 10-bit Programmable 360? Magnetic Angle Encoder With Absolute Digital And Analog Outputs
• Manufacturer: austriamicrosystems

AS5043 Programmable 360° Magnetic Angle Encoder
Data D9:D0 is valid, when the status bits have the
following configurations:
MagInc, (Magnitude Increase) becomes HIGH, when the
magnet is pushed towards the IC, thus the magnetic field
strength is increasing.
8.2
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).
Revision 1.6, 3-Oct-06
1
CSn
CLK
OCF
DO
SSI Status bits
Mag
INC
0
0
1
1
1
t
Z-Axis Range Indication (Push Button Feature, Red/Yellow/Green Indicator)
DO active
0
COF
Mag
DEC
0
1
0
1
1
t
CLK FE
0
LIN
0
0
0
0
1
LIN
Table 2: Status bit outputs
T
t
DO valid
CLK / 2
1
D9
0
0
1
Hardware Pins
Mag
Rngn
Off
Off
Off
On
On
Mag
INC
D8
Figure 5: Synchronous serial interface with absolute angular position data
enabled
enabled
Analog
output
enabled
enabled
disabled
D7
0
1
0
Mag
DEC
D6
Angular Position Data
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 programming (see 11.1.2).
It is still possible to use the absolute serial interface in the red range, but not recommended.
even
checksum
of bits 1:15
D5
Parity
Table 3: Magnetic field strength indicators
www.austriamicrosystems.com
D4
D3
8
D2
D1
MagDec, (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 Table 3).
Note: Pin 1 (MagRngn) is a combination of MagInc and
MagDec. It is active low via an open drain output and
requires an external pull-up resistor. If the magnetic field
is in range, this output is turned off. (logic “high”).
Even Parity bit for transmission error detection of bits
1…15 (D9…D0, OCF, COF, LIN, MagInc, MagDec)
The absolute angular output is always set to a resolution
of 10 bit / 360°. Placing the magnet above the chip,
angular values increase in clockwise direction by default.
Additionally, the analog output provides a safety feature
in the form that it will be turned off when the magnetic
field
The serial data is always available, the red/yellow/green
status is indicated by the status bits as shown below:
D0
OCF
is
Description
COF
too
Status Bits
LIN
strong
M a g
I N C
or
D E C
M a g
too
16
Even
PAR
t
DO Tristate
weak
t
CSn
t
CLK FE
(RED
Page 5 of 26
range).
1
D9