wm8987 Wolfson Microelectronics plc, wm8987 Datasheet - Page 51

• Manufacturer Part Number: wm8987
• Description: Stereo Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Production Data
Figure 34 ADC Digital Filter Frequency Response – Type 2
Figure 36 ADC Digital Filter Frequency Response – Type 2
Figure 38 De-emphasis Frequency Response (32kHz)
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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 35 ADC Digital Filter Ripple – Type 2
Figure 37 ADC Digital Filter Ripple – Type 3
Figure 39 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 August 2008
12000
0.2
0.2
WM8987L
14000
16000
0.25
0.25
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