WM8782A Datasheet, PDF (16/20 Pages) Cirrus Logic – 24-Bit, 192kHz Stereo ADC

WM8782A
DIGITAL FILTER CHARACTERISTICS
The WM8782A digital filter characteristics scale with sample rate.
Production Data
PARAMETER
TEST CONDITIONS
ADC Sample Rate (Single Rate – 48Hz typically)
Passband
+/- 0.01dB
-6dB
Passband Ripple
Stopband
Stopband Attenuation
f > 0.5465fs
Group Delay
ADC Sample Rate (Dual Rate – 96kHz typically)
Passband
+/- 0.01dB
-6dB
Passband Ripple
Stopband
Stopband Attenuation
f > 0.5465fs
Group Delay
Table 7 Digital Filter Characteristics
MIN
0
0.5465fs
-65
0
0.5465fs
-65
TYP
0.4892fs
22
0.4892fs
22
MAX
0.4535fs
+/- 0.01
0.4535fs
+/- 0.01
UNIT
dB
dB
fs
dB
dB
fs
ADC FILTER RESPONSES
0
-20
-40
-60
-80
0
0.5
1
1.5
2
2.5
3
Frequency (Fs)
0.02
0.015
0.01
0.005
0
-0.005
-0.01
-0.015
-0.02
0
0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
Frequency (Fs)
Figure 10 Digital Filter Frequency Response
Figure 11 ADC Digital Filter Ripple
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PD, April 2010, Rev 4.8
16