wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 316

• Manufacturer Part Number: wm8351
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

WM8351
28 DIGITAL FILTER CHARACTERISTICS
Terminology
1.
2.
Figure 81 DAC Digital Filter Frequency Response (Normal
Mode)
w
MAGNITUDE(dB)
Passband
Passband Ripple
Stopband
Stopband Attenuation
Group Delay
High Pass Filter Corner
Frequency
Passband
Passband Ripple
Stopband
Stopband Attenuation
Group Delay
ADC Filter
DAC Filter
ADC High Pass Filter
-100
-110
-120
-130
-140
-10
-20
-30
-40
-50
-60
-70
-80
-90
10
0
0
Stop Band Attenuation (dB) – the degree to which the frequency spectrum is attenuated (outside audio band)
Pass-band Ripple – any variation of the frequency response in the pass-band region
PARAMETER
4.41k
8.82k
13.23k
17.64k
28.1.1
22.05k
26.46k
TEST CONDITIONS
DAC FILTER RESPONSES
30.87k
+/- 0.025dB
+/- 0.035dB
f > 0.546fs
f > 0.546fs
-0.5dB
-0.1dB
-6dB
-3dB
-6dB
35.28k
39.69k
44.1k
Figure 82 DAC Digital Filter Ripple (Normal Mode)
MAGNITUDE(dB)
999.99u
40m
37m
34m
31m
28m
25m
22m
19m
16m
13m
10m
-2m
-5m
0.546fs
0.546fs
7m
4m
0
MIN
0
0
2.205k
4.41k
+/- 0.025
+/-0.035
0.5fs
21/fs
0.5fs
29/fs
10.4
21.6
TYP
-60
3.7
-55
6.615k
8.82k
0.454fs
0.454fs
11.025k
MAX
13.23k
PD, June 2009, Rev 4.1
15.435k
UNIT
dB
dB
dB
dB
Hz
17.64k
Production Data
19.845k
22.05k
316