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WM8974GEFL/V Datasheet(PDF) 77 Page - Wolfson Microelectronics plc

Part # WM8974GEFL/V
Description  Mono CODEC with Speaker Driver
PDF  87 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8974GEFL/V Datasheet(HTML) 77 Page - Wolfson Microelectronics plc

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Production Data
WM8974
w
PD Rev 4.2 March 2007
77
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
-80
dB
Group Delay
29/fs
Table 63 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 64 for the total delay.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ADC Path Group Delay
EQ disabled
26/fs
28/fs
30/fs
Total Delay (ADC analogue
input to digital audio interface
output)
EQ enabled
27/fs
29/fs
31/fs
DAC Path Group Delay
EQ disabled
34/fs
36/fs
38/fs
Total Delay (Audio interface
input to DAC analogue
output)
EQ enabled
35/fs
37/fs
39/fs
Table 64 Total Group Delay
Notes:
1.
Wind noise filter is disabled.



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