WM8903 Datasheet, PDF (28/178 Pages) Wolfson Microelectronics plc – Ultra Low Power CODEC for Portable Audio Applications

WM8903
DE-EMPHASIS FILTER RESPONSES
0
-1 ⁰
-2
-3
-4
-5
-6
-7
-8
-9
-10
MAGNITUDE(dB)
5000
10000
15000
20000
Frequency (Hz)
Production Data
0.3
0.25
0.2
0.15
0.1
0.05
0
0
-0.05
-0.1
-0.15
MAGNITUDE(dB)
2000 4000 6000 8000 10000 12000 14000 16000 18000
Frequency (Hz)
Figure 16 De-Emphasis Digital Filter Response (32kHz)
Figure 17 De-Emphasis Error (32kHz)
0
-1 ⁰
-2
-3
-4
-5
-6
-7
-8
-9
-10
5000
MAGNITUDE(dB)
10000
15000
Frequency (Hz)
20000
25000
0.2
0.15
0.1
0.05
0
0
-0.05
-0.1
MAGNITUDE(dB)
5000
10000
15000
20000
Frequency (Hz)
Figure 18 De-Emphasis Digital Filter Response (44.1kHz)
Figure 19 De-Emphasis Error (44.1kHz)
25000
0
0
-2
-4
-6
-8
-10
-12
5000
MAGNITUDE(dB)
10000
15000
20000
25000
30000
Frequency (Hz)
0.15
0.1
0.05
0
0
-0.05
-0.1
-0.15
MAGNITUDE(dB)
5000
10000
15000
20000
25000
30000
Frequency (Hz)
Figure 20 De-Emphasis Digital Filter Response (48kHz)
Figure 21 De-Emphasis Error (48kHz)
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PD, Rev 4.5, June 2012
28