wm8941 Wolfson Microelectronics plc, wm8941 Datasheet - Page 87

• Manufacturer Part Number: wm8941
• Description: Mono Codec With Speaker Driver And Video Buffer
• Manufacturer: Wolfson Microelectronics plc

Production Data
Notes
w
DIGITAL FILTER CHARACTERISTICS
Table 62 Digital Filter Characteristics
TERMINOLOGY
1.
2.
3.
Table 63 Total Group Delay
1.
Passband
Passband Ripple
Stopband
Stopband Attenuation
Group Delay
High Pass Filter Corner
Frequency
Passband
Passband Ripple
Stopband
Stopband Attenuation
Group Delay
Total Delay (ADC analogue
input to digital audio interface
output)
Total Delay (Audio interface
input to DAC analogue
output)
ADC Filter
DAC Filter
ADC High Pass Filter
Stop Band Attenuation (dB) – the degree to which the frequency spectrum is attenuated (outside audio band)
Pass-band Ripple – any variation of the frequency response in the pass-band region
Note that this delay applies only to the filters and does not include additional delays through other digital circuits. See
Table 63 for the total delay.
Wind noise filter is disabled.
PARAMETER
PARAMETER
28/fs
33/fs
MIN
TEST CONDITIONS
+/- 0.025dB
+/- 0.035dB
f > 0.546fs
f > 0.546fs
-0.5dB
-0.1dB
-6dB
-3dB
-6dB
30/fs
35/fs
TYP
32/fs
37/fs
MAX
0.546fs
0.546fs
-60
-55
MIN
0
0
UNIT
fs
fs
0.5fs
21/fs
0.5fs
29/fs
10.4
21.6
3.7
TYP
+/- 0.025
+/-0.035
0.454fs
0.454fs
MAX
PD, Rev 4.0, August 2008
UNIT
dB
dB
Hz
dB
dB
WM8941
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