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WM8731SEDS/V データシート(PDF) 58 Page - Wolfson Microelectronics plc

部品番号 WM8731SEDS/V
部品情報  Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
PDF  65 Pages
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メーカー  WOLFSON [Wolfson Microelectronics plc]
ホームページ  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8731SEDS/V データシート(HTML) 58 Page - Wolfson Microelectronics plc

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WM8731 / WM8731L
Production Data
w
PD, Rev 4.9, October 2012
58
-100
-80
-60
-40
-20
0
0
0.5
1
1.5
2
2.5
3
Frequency (Fs)
-0.06
-0.05
-0.04
-0.03
-0.02
-0.01
0
0.01
0.02
0
0.05
0.1
0.15
0.2
0.25
Frequency (Fs)
Figure 47 ADC Digital Filter Frequency Response –Type 2
Figure 48 ADC Digital Filter Ripple –Type 2
-100
-80
-60
-40
-20
0
0
0.5
1
1.5
2
2.5
3
Frequency (Fs)
-0.06
-0.05
-0.04
-0.03
-0.02
-0.01
0
0.01
0.02
0
0.05
0.1
0.15
0.2
0.25
Frequency (Fs)
Figure 49 ADC Digital Filter Frequency Response –Type 3
Figure 50 ADC Digital Filter Ripple –Type 3
ADC HIGH PASS FILTER
The WM8731/L has a selectable digital high pass filter to remove DC offsets. The filter response is
characterised by the following polynomial.
H(z) =
1 – z
-1
1 – 0.9995 z
-1



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