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AS5043TR Datasheet(PDF) 10 Page - ams AG

Part No. AS5043TR
Description  PROGRAMMABLE 360째 MAGNETIC ANGLE ENCODER WITH ABSOLUTE SSI AND ANALOG OUTPUTS
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS5043TR Datasheet(HTML) 10 Page - ams AG

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AS5043 Programmable 360° Magnetic Angle Encoder
Revision 1.4, 04-Apr-06
www.austriamicrosystems.com
Page 10 of 26
AS5043 Demoboard
+
7
2
3
4
5
6
1
10n
1µF
µC
only required for
OTP programming
OTP: keep these wires as
short as possible
max. length = 2 inches (5cm)
GND
PROG
CSN
DO
CLK
5VUSB
VDD3V3
VSS
+
10µF
2
3
1
GND
VSS
VPROG
7.5 … 8.0V
only required for
OTP programming
connect to USB
interface on PC
VOUT_EXT
8
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
MagRngn
Mode
CSn
CLK
NC
DO
VSS
Prog_DI
DACref
DACout
FB
Vout
NC
NC
VDD3V3
VDD5V
AS5043
IC1
Figure 12: OTP programming hardware connection of AS5043 (shown with AS5043 demoboard)
12.1 Zero Position Programming
The AS5043 allows easy assembly of the system, as the
actual angle of the magnet does not need to be
considered. By OTP programming, any position can be
assigned as the new permanent zero position with an
accuracy of 0.35° (all modes).
Using the same procedure, the AS5043 can be calibrated
to assign a given output voltage to a given angle. With
this approach, all offset errors (DAC + OPAMP) are also
compensated for the calibrated position.
Essentially, for a given mechanical position, the angular
measurement system is electrically rotated (by changing
the Zero Position value in the OTP register), until the
output matches the desired mechanical position.
The example in Figure 13 below shows a configuration
for 5V supply voltage and 10%-90% output voltage
range. It adjusted by Zero Position Programming to
provide an analog output voltage of 2.0 Volts at an angle
of 180°. The slope of the curve may be further adjusted
by changing the gain of the OPAMP output stage and by
selecting the desired angular range (360°/180°/90°/45°).
Figure 13: Zero position programming (shown for 360° mode)
VDD5V
0°
90°
180°
270°
360°
analog
output
voltage
mechanical
angle
5V
2V
the output can be electrically rotated to
match
a given output voltage to any
mechanical position
0V


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