WM8980_07 Datasheet, PDF (103/112 Pages) Wolfson Microelectronics plc – Stereo CODEC With Speaker Driver and Video Buffer

Pre-Production
DIGITAL FILTER CHARACTERISTICS
PARAMETER
ADC Filter
Passband
Passband Ripple
Stopband
Stopband Attenuation
Group Delay
ADC High Pass Filter
High Pass Filter Corner
Frequency
TEST CONDITIONS
+/- 0.025dB
-6dB
f > 0.546fs
-3dB
-0.5dB
DAC Filter
Passband
Passband Ripple
Stopband
Stopband Attenuation
Group Delay
-0.1dB
+/- 0.035dB
-6dB
f > 0.546fs
Table 66 Digital Filter Characteristics
WM8980
MIN
0
0.546fs
-60
0
0.546fs
-55
TYP
0.5fs
21/fs
3.7
10.4
21.6
0.5fs
29/fs
MAX
UNIT
0.454fs
+/- 0.025
dB
dB
Hz
0.454fs
+/-0.035
dB
dB
TERMINOLOGY
1. Stop Band Attenuation (dB) – the degree to which the frequency spectrum is attenuated (outside audio band)
2. Pass-band Ripple – any variation of the frequency response in the pass-band region
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PP Rev 3.1 March 2007
103