AS5600 Datasheet, PDF (28/42 Pages) ams AG – 12-bit Programmable Contactless Potentiometer

AS5600 − Detailed Description
Figure 31:
Step Response Delay vs. Noise Band
If the fast filter is off, the step output response is controlled by
the slow linear filter. The step response of the slow filter is
programmable with the SF bits in the CONF register. Figure 32
shows the tradeoff between delay and noise for the different
SF bit settings.
SF
Step response delay delay (ms) Max. RMS output noise (1 sigma) (degree)
00
2.2
0.015
01
1.1
0.021
10
0.55
0.030
11
0.286
0.043
Figure 32:
Step Response (fast filter off)
Input
Sampling
Frequency
Output
response
Settling Time
according slow filter setting
Noise
Page 28
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For a fast step response and low noise after settling, the fast
filter can be enabled. The fast filter works only if the input
variation is greater than the fast filter threshold, otherwise the
output response is determined only by the slow filter. The fast
filter threshold is programmed with the FTH bits in the “CONF
Register” on page 19. As shown in Figure 34, the step response
stays within an error band after two full sampling periods to
settle to the final value determined by the slow filter.
ams Datasheet
[v1-00] 2014-Aug-11