as5043 austriamicrosystems, as5043 Datasheet - Page 10

• 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
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.
Revision 1.6, 3-Oct-06
analog
output
voltage
VDD5V
2V
Figure 12: OTP programming hardware connection of AS5043 (shown with AS5043 demoboard)
5V
0V
0°
Figure 13: Zero position programming (shown for 360° mode)
90°
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the output can be electrically rotated to
match
mechanical position
a given output voltage to any
180°
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°).
270°
360°
mechanical
angle
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