CS5331A-BS Просмотр технического описания (PDF) - Cirrus Logic
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CS5331A-BS Datasheet PDF : 30 Pages
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Digital Filter
Figures 5 through 8 show the attenuation charac-
teristics of the digital filter included in the ADC.
The filter response scales linearly with sample
rate. The x-axis has been normalized to Fs, and
can be scaled by multiplying the x-axis by the
system sample rate, i.e. 48kHz.
CS5330A/CS5331A
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0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Normalized Input Frequency
Figure 5. CS5330A/31A Digital Filter Stopband Rejection
2
0
-2
-4
-6
-8
-10
.46 .47 .48 .49 .50 .51 .52 .53 .54
Normalized Input Frequency
Figure 6. CS5330A/31A Digital Filter Transition Band
0.05
0.04
0.03
0.02
0.01
0.00
-0.01
-0.02
-0.03
-0.04
-0.05
0
0.1
0.2
0.3
0.4
0.5
Normalized Input Frequency
Figure 7. CS5330A/31A Digital Filter Passband Ripple
0.0
-10.0
-20.0
-30.0
-40.0
-50.0
-60.0
-70.0
-80.0
-90.0
-100.0
0.40
0.45 0.50 0.55
0.60
Normalized Input Frequency
0.65
0.70
Figure 8. CS5330A/31A Digital Filter Transition Band
12
DS138F2
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