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AS5040 View Datasheet(PDF) - austriamicrosystems AG

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AS5040 Datasheet PDF : 61 Pages
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AS5040 − Analog Output
Analog Output
An analog output can be generated by averaging the PWM
signal, using an external active or passive low pass filter. The
analog output voltage is proportional to the angle:
0º= 0V; 360º = VDD5V.
Using this method, the AS5040 can be used as direct
replacement of potentiometers.
Figure 30:
Simple Passive 2nd Order RC Low Pass Filter
Pin12
PWM
Pin7
VSS
R1
C1
R2
analog out
VDD2
C2
0V2
360°
(EQ2) R1, R2 ≥ 4K7 C1, C2 ≥ 1μF/6V
R1 should be ≥ 4k7 to avoid loading of the PWM output. Larger
values of Rx and Cx will provide better filtering and less ripple,
but will also slow down the response time.
ams Datasheet
[v2-12] 2017-Jun-20
Page 27
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