Production Data
WM8776
DIGITAL FILTER CHARACTERISTICS
PARAMETER
ADC Filter
Passband
TEST CONDITIONS
MIN
TYP
MAX
0.4535fs
0.01
UNIT
0.01 dB
-6dB
0
0.5fs
Passband ripple
Stopband
dB
0.5465fs
-65
Stopband Attenuation
Group Delay
DAC Filter
f > 0.5465fs
dB
fs
22
Passband
0.05 dB
-3dB
0.454fs
0.05
0.4892 fs
Passband ripple
Stopband
dB
0.546fs
-60
Stopband Attenuation
Group Delay
f > 0.546fs
dB
fs
19
Table 17 Digital Filter Characteristics
DAC FILTER RESPONSES
10
0
0
-20
-10
-20
-30
-40
-50
-60
-70
-80
-40
-60
-80
-100
-120
0.4
0.45
0.5
Frequency (Fs)
0.55
0.6
0
0.5
1
1.5
2
2.5
3
Frequency (Fs)
Figure 28 DAC Digital Filter Transition Band – 44.1, 48 and
96kHz
Figure 27 DAC Digital Filter Frequency Response – 44.1, 48
and 96kHz
PD Rev 4.0 April 2005
49
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
