wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 26
![no-image](/images/no-image-200.jpg)
wm8918
Manufacturer Part Number
wm8918
Description
Ultra Low Power Dac For Portable Audio Applications
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8918.pdf
(175 pages)
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WM8918
DE-EMPHASIS FILTER RESPONSES
Figure 14 De-Emphasis Digital Filter Response (32kHz)
Figure 16 De-Emphasis Digital Filter Response (44.1kHz)
Figure 18 De-Emphasis Digital Filter Response (48kHz)
w
-10
-10
-12
-10
-1
-2
-3
-4
-5
-6
-7
-8
-9
-2
-4
-6
-8
0
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
0
0
0
0
5000
5000
5000
10000
10000
MAGNITUDE(dB)
Frequency (Hz)
MAGNITUDE(dB)
MAGNITUDE(dB)
Frequency (Hz)
Frequency (Hz)
10000
15000
15000
20000
15000
20000
25000
20000
25000
30000
Figure 15 De-Emphasis Error (32kHz)
Figure 17 De-Emphasis Error (44.1kHz)
Figure 19 De-Emphasis Error (48kHz)
-0.05
-0.15
-0.05
-0.05
-0.15
0.25
0.15
0.05
0.15
0.05
0.15
0.05
-0.1
-0.1
-0.1
0.3
0.2
0.1
0.1
0.2
0.1
0
0
0
0
0
0
2000
5000
5000
4000
10000
6000
10000
MAGNITUDE(dB)
MAGNITUDE(dB)
MAGNITUDE(dB)
Frequency (Hz)
Frequency (Hz)
Frequency (Hz)
8000
15000
PD, Rev 4.0, September 2010
10000
15000
12000
20000
14000
20000
Production Data
25000
16000
18000
30000
25000
26
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