WM8978 Wolfson Microelectronics Ltd., WM8978 Datasheet - Page 100

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WM8978

Manufacturer Part Number
WM8978
Description
The WM8978 is a low power, high quality stereo codec designed for portable applications such as Digital still camera or Digital Camcorde
Manufacturer
Wolfson Microelectronics Ltd.
Datasheet

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Figure 47 ADC Digital Filter Frequency Response
WM8978
DAC FILTER RESPONSES
Figure 43 DAC Digital Filter Frequency Response
(128xOSR)
Figure 45 DAC Digital Filter Frequency Response (64xOSR)
ADC FILTER RESPONSES
w
-100
-120
-140
-160
-100
-120
-140
-160
-100
-120
-20
-40
-60
-80
-20
-40
-60
-80
20
20
-20
-40
-60
-80
0
0
0
0
0
0
0.5
0.5
0.5
1
Frequency (Fs)
1
1
Frequency (fs)
Frequency (fs)
1.5
1.5
1.5
2
2
2
2.5
2.5
2.5
3
Figure 44 DAC Digital Filter Ripple (128xOSR)
Figure 46 DAC Digital Filter Ripple (64xOSR)
Figure 48 ADC Digital Filter Ripple
3.05
2.95
2.85
2.75
2.65
3.05
2.95
2.85
2.75
2.65
2.9
2.8
2.7
2.6
2.9
2.8
2.7
2.6
3
3
0
0
-0.05
-0.15
0.15
0.05
-0.1
-0.2
0.2
0.1
0.05
0.05
0
0
0.1
0.1
0.15
0.15
0.1
0.2
0.2
Frequency (Fs)
Frequency (fs)
Frequency (fs)
0.2
0.25
0.25
PTD Rev 2.6 November 2005
Preliminary Technical Data
0.3
0.3
0.3
0.35
0.35
0.4
0.4
0.4
0.45
0.45
0.5
0.5
0.5
100