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WM8952ECS/RV 데이터시트(PDF) 65 Page - Wolfson Microelectronics plc

부품명 WM8952ECS/RV
상세설명  Mono ADC with Microphone Pre-amplifier
PDF  72 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8952ECS/RV 데이터시트(HTML) 65 Page - Wolfson Microelectronics plc

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Pre Production
WM8952
w
PP, Rev 3.1, June 2011
65
DIGITAL FILTER CHARACTERISTICS
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ADC Filter
Passband
+/- 0.025dB
0
0.454fs
-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
High Pass Filter Corner
Frequency
-3dB
3.7
Hz
-0.5dB
10.4
-0.1dB
21.6
Table 48 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 49 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
Table 49 Total Group Delay
Notes
1.
Wind noise filter is disabled.
ADC FILTER RESPONSES
-120
-100
-80
-60
-40
-20
0
0
0.5
1
1.5
2
2.5
3
Frequency (Fs)
-0.2
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
0.2
0
0.1
0.2
0.3
0.4
0.5
Frequency (Fs)
Figure 32 ADC Digital Filter Frequency Response
Figure 33 ADC Digital Filter Ripple



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