WM8974GEFL/V Wolfson Microelectronics, WM8974GEFL/V Datasheet - Page 80

• Manufacturer Part Number: WM8974GEFL/V
• Description: Audio CODECs Mono Codec with Spkr
• Manufacturer: Wolfson Microelectronics

Specifications of WM8974GEFL/V

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-24
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8974
w
HIGHPASS FILTER
Figure 48 ADC Highpass Filter Responses (24kHz),
HPFAPP=1, all cutoff settings shown.
Figure 46 ADC Highpass Filter Response, HPFAPP=0
-10
-15
-20
-25
-30
-35
-40
-5
5
0
0
-10
-20
-30
-40
-50
-60
-70
-80
10
0
0
5
10
200
15
Frequency (Hz)
20
400
The WM8974 has a selectable digital highpass filter in the ADC filter path. This filter has two
modes, audio and applications. In audio mode the filter is a 1
3.7Hz.
frequency.
25
Frequency (Hz)
600
30
In applications mode the filter is a 2
35
800
40
45
1000
1200
Figure 47 ADC Highpass Filter Responses (48kHz),
HPFAPP=1, all cutoff settings shown.
Figure 49 ADC Highpass Filter Responses (12kHz),
HPFAPP=1, all cutoff settings shown.
-10
-20
-30
-40
-50
-60
10
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
10
0
0
0
nd
order high pass filter with a selectable cutoff
200
200
400
400
st
Frequency (Hz)
order IIR with a cutoff of around
Frequency (Hz)
600
PD, Rev 4.5, September 2008
600
800
800
Production Data
1000
1000
1200
1200
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