Cirrus Logic CS5581 - Manual (Page 23)

CS5581
DS796PP1 23
3/25/08
14:34
3.9 Digital Filter Characteristics
The digital filter is designed for fast settling, therefore it exhibits very little in-band attenuation. The filter
attenuation is 0.26347 dB at 100 kHz when sampling at 200 kSps.
Figure 18. CS5581 Spectral Response (DC to fs/2)
Figure 19. CS5581 Spectral Response (DC to 20 kHz)
Figure 20. CS5581 Spectral Response (DC to 8fs)
-0.30
-0.25
-0.20
-0.15
-0.10
-0.05
0.00
0 20k 40k 60k 80k 100k
Frequency (Hz)
-0.01049 dB
-0.16813 dB
-0.26347 dB
fs = 200 kSps
-0.04206 dB
-0.09443 dB
-0.015
-0.01
-0.005
0.00
0 5k 10k 15k 20k
Frequency (Hz)
-0.002622 dB
-0.005901 dB
-0.01049 dB
fs = 200 kSps
-0.006283 dB
-120
-100
-80
-60
-40
-20
0
0 400k 800k 1.2M 1.6M
Frequency (Hz)
fs = 200 kSps