as5046 austriamicrosystems, as5046 Datasheet - Page 21

• Manufacturer Part Number: as5046
• Description: Programmable 12-bit 360? Magnetic Angle Encoder With Absolute 2-wire Serial And Analog Interfaces
• Manufacturer: austriamicrosystems

AS5046 Programmable 360° Magnetic Angle Encoder – Preliminary Data Sheet
12.1 Zero Position Programming
The AS5046 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 AS5046 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 1.0
Prog
CSn
SCL
Figure 15: OTP programming hardware connection of AS5046 (shown with AS5046 demoboard)
Write Data
t
Load PROG
Data
Figure 14: Complete OTP programming sequence
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1
Programming Mode
t
PrgR
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 16 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°).
t
t
PROG
PrgH
16
Power Off
t
PROG finished
7.5V
VDD
V
0V
ProgOff
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