CS4244 Datasheet, PDF (59/63 Pages) Cirrus Logic – 4 In/4 Out Audio CODEC with PCM and TDM Interfaces

7. ADC FILTER PLOTS
Stopband Rejection
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Frequency (normalized to Fs)
Figure 32. ADC Stopband Rejection
Transition Band (Detail)
0
−1
−2
−3
−4
−5
−6
−7
−8
−9
−10
0.45
0.46
0.47
0.48
0.49
0.5
0.51
0.52
0.53
0.54
0.55
Frequency (normalized to Fs)
Figure 34. ADC Transition Band (Detail)
High Pass Filter Response (Fs 48kHz)
0
−0.5
−1
−1.5
−2
−2.5
−3
0
2
4
6
8
10
12
14
16
18
20
Frequency (Hz)
Figure 36. ADC HPF (48 kHz)
CS4244
a sto a d
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
0.4
0.42
0.44
0.46
0.48
0.5
0.52
0.54
0.56
0.58
0.6
Frequency (normalized to Fs)
Figure 33. ADC Transition Band
Passband Ripple
0.05
0.04
0.03
0.02
0.01
0
−0.01
−0.02
−0.03
−0.04
−0.05
0
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
Frequency (normalized to Fs)
Figure 35. ADC Passband Ripple
g ass te espo se ( s 96 )
−0.5
−1
−1.5
−2
−2.5
−3
0
2
4
6
8
10
12
14
16
18
20
Frequency (Hz)
Figure 37. ADC HPF (96 kHz)
DS900F2
59