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WM8952ECS/RV Datenblatt(PDF) 66 Page - Wolfson Microelectronics plc

Teilenummer WM8952ECS/RV
Bauteilbeschribung  Mono ADC with Microphone Pre-amplifier
PDF  72 Pages
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Hersteller  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8952ECS/RV Datenblatt(HTML) 66 Page - Wolfson Microelectronics plc

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WM8952
Pre Production
w
PP, Rev 3.1, June 2011
66
HIGHPASS FILTER
The WM8952 has a selectable digital high pass filter in the ADC filter path. This filter has two
modes, audio and applications. In audio mode the filter is a 1st order IIR with a cut-off of around
3.7Hz.
In applications mode the filter is a 2nd order high pass filter with a selectable cut-off
frequency.
-40
-35
-30
-25
-20
-15
-10
-5
0
5
0
5
10
15
20
25
30
35
40
45
Frequency (Hz)
-60
-50
-40
-30
-20
-10
0
10
0
200
400
600
800
1000
1200
Frequency (Hz)
Figure 34 ADC High Pass Filter Response, HPFAPP=0
Figure 35 ADC High Pass Filter Responses (48kHz),
HPFAPP=1, all cut-off settings shown.
-80
-70
-60
-50
-40
-30
-20
-10
0
10
0
200
400
600
800
1000
1200
Frequency (Hz)
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10
0
200
400
600
800
1000
1200
Frequency (Hz)
Figure 36 ADC High Pass Filter Responses (24kHz),
HPFAPP=1, all cut-off settings shown.
Figure 37 ADC High Pass Filter Responses (12kHz),
HPFAPP=1, all cut-off settings shown.



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