WM8985
Pre-Production
DAC FILTER RESPONSES
3.05
3
20
0
2.95
2.9
-20
-40
2.85
2.8
-60
-80
2.75
2.7
-100
-120
-140
-160
2.65
2.6
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
0
0.5
1
1.5
Frequency (fs)
2
2.5
Frequency (fs)
Figure 40 DAC Digital Filter Frequency Response
(128xOSR)
Figure 41 DAC Digital Filter Ripple (128xOSR)
3.05
3
20
0
2.95
2.9
-20
-40
2.85
2.8
-60
-80
2.75
2.7
-100
-120
-140
-160
2.65
2.6
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
0
0.5
1
1.5
Frequency (fs)
2
2.5
Frequency (fs)
Figure 42 DAC Digital Filter Frequency Response (64xOSR) Figure 43 DAC Digital Filter Ripple (64xOSR)
ADC FILTER RESPONSES
0.2
0
0.15
-20
-40
0.1
0.05
0
-60
-0.05
-0.1
-0.15
-0.2
-80
-100
-120
0
0.1
0.2
0.3
0.4
0.5
0
0.5
1
1.5
2
2.5
3
Frequency (Fs)
Frequency (Fs)
Figure 44 ADC Digital Filter Frequency Response
Figure 45 ADC Digital Filter Ripple
PP, Rev 3.4, October 2006
110
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
