WM8501
Pre-Production
DIGITAL FILTER CHARACTERISTICS
PARAMETER
Passband Edge
SYMBOL
TEST CONDITIONS
-3dB
MIN
TYP
MAX
UNIT
0.487fs
Passband Ripple
f < 0.444fs
f > 0.555fs
0.05
dB
dB
Stopband Attenuation
-60
Table 5 Digital Filter Characteristics
DAC FILTER RESPONSES
0.2
0.15
0.1
0
-20
-40
0.05
0
-60
-0.05
-0.1
-0.15
-80
-100
-120
-0.2
0
0.5
1
1.5
2
2.5
3
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
Frequency (Fs)
Frequency (Fs)
Figure 7 DAC Digital Filter Frequency Response -
44.1, 48 and 96kHz
Figure 8 DAC Digital Filter Ripple -
44.1, 48 and 96kHz
0.2
0
-20
-40
-60
-80
0
-0.2
-0.4
-0.6
-0.8
-1
0
0.2
0.4
0.6
0.8
1
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
Frequency (Fs)
Frequency (Fs)
Figure 9 DAC Digital Filter Frequency Response - 192kHz Figure 10 DAC Digital Filter Ripple - 192kHz
PP Rev 3.1 May 2006
14
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
