WM8972L Datasheet, PDF (42/49 Pages) Wolfson Microelectronics plc – MONO CODEC FOR PORTABLE AUDIO APPLICATIONS

WM8972L
0
Preliminary Technical Data
0.25
0.2
0.15
-20
0.1
-40
0.05
0
-60
-0.05
-0.1
-80
-0.15
-0.2
-100
0
0.5
1
1.5
2
2.5
3
Frequency (Fs)
-0.25
0
0.05
0.1
0.15
0.2
0.25
Frequency (Fs)
Figure 32 ADC Digital Filter Frequency Response – Type 2 Figure 33 ADC Digital Filter Ripple – Type 2
0.25
0
0.2
0.15
-20
0.1
0.05
-40
0
-60
-0.05
-0.1
-80
-0.15
-0.2
-100
0
0.5
1
1.5
2
2.5
3
Frequency (Fs)
-0.25
0
0.05
0.1
0.15
0.2
0.25
Frequency (Fs)
Figure 34 ADC Digital Filter Frequency Response – Type 2 Figure 35 ADC Digital Filter Ripple – Type 3
DE-EMPHASIS FILTER RESPONSES
0
0.4
0.3
-2
0.2
0.1
-4
0
-6
-0.1
-0.2
-8
-0.3
-10
0
2000 4000 6000 8000 10000 12000 14000 16000
Frequency (Fs)
Figure 36 De-emphasis Frequency Response (32kHz)
-0.4
0
2000 4000 6000 8000 10000
Frequency (Fs)
Figure 37 De-emphasis Error (32kHz)
12000
14000
16000
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PTD Rev 2.2 June 2004
42