wm8988 Wolfson Microelectronics plc, wm8988 Datasheet - Page 50

• Manufacturer Part Number: wm8988
• Description: Stereo Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8988
Figure 33 ADC Digital Filter Frequency Response – Type 2
Figure 35 ADC Digital Filter Frequency Response – Type 2
Figure 37 De-emphasis Frequency Response (32kHz)
w
DE-EMPHASIS FILTER RESPONSES
-100
-20
-40
-60
-80
-100
0
-20
-40
-60
-80
-10
-2
-4
-6
-8
0
0
0
0
0
2000
0.5
0.5
4000
1
1
6000
Frequency (Fs)
Frequency (Fs)
Frequency (Fs)
1.5
8000
1.5
10000
2
2
12000
2.5
2.5
14000
16000
3
3
Figure 34 ADC Digital Filter Ripple – Type 2
Figure 36 ADC Digital Filter Ripple – Type 3
Figure 38 De-emphasis Error (32kHz)
-0.05
-0.15
-0.25
0.25
0.15
0.05
-0.1
-0.2
0.2
0.1
-0.05
-0.15
-0.25
0.25
0.15
0.05
-0.1
-0.2
-0.1
-0.2
-0.3
-0.4
0
0.2
0.1
0.4
0.3
0.2
0.1
0
0
0
0
0
2000
0.05
0.05
4000
6000
0.1
Frequency (Fs)
0.1
Frequency (Fs)
Frequency (Fs)
8000
0.15
0.15
10000
PD, Rev 4.0, October 2008
12000
0.2
0.2
Production Data
14000
16000
0.25
0.25
50