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WM8940 датащи(PDF) 78 Page - Wolfson Microelectronics plc

номер детали WM8940
подробное описание детали  Mono CODEC with Speaker Driver
PDF  85 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8940 датащи(HTML) 78 Page - Wolfson Microelectronics plc

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WM8940
Pre-Production
w
Pre-Production, Rev 3.0, February 2007
78
DIGITAL FILTER CHARACTERISTICS
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ADC Filter
+/- 0.025dB
0
0.454fs
Passband
-6dB
0.5fs
Passband Ripple
+/- 0.025
dB
Stopband
0.546fs
Stopband Attenuation
f > 0.546fs
-60
dB
Group Delay
21/fs
ADC High Pass Filter
-3dB
3.7
-0.5dB
10.4
High Pass Filter Corner
Frequency
-0.1dB
21.6
Hz
DAC Filter
+/- 0.035dB
0
0.454fs
Passband
-6dB
0.5fs
Passband Ripple
+/-0.035
dB
Stopband
0.546fs
Stopband Attenuation
f > 0.546fs
-55
dB
Group Delay
29/fs
Table 61 Digital Filter Characteristics
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
3.
Note that this delay applies only to the filters and does not include additional delays through other digital circuits. See
Table 62 for the total delay.
PARAMETER
MIN
TYP
MAX
UNIT
Total Delay (ADC analogue
input to digital audio interface
output)
28/fs
30/fs
32/fs
fs
Total Delay (Audio interface
input to DAC analogue
output)
33/fs
35/fs
37/fs
fs
Table 62 Total Group Delay
Notes
1.
Wind noise filter is disabled.



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