wm8770 Wolfson Microelectronics plc, wm8770 Datasheet - Page 45

• Manufacturer Part Number: wm8770
• Description: 24-bit, 192khz 8-channel Codec With Volume Control
• Manufacturer: Wolfson Microelectronics plc

Production Data
DIGITAL FILTER CHARACTERISTICS
Table 16 Digital Filter Characteristics
DAC FILTER RESPONSES
Figure 27 DAC Digital Filter Frequency Response
Figure 29 DAC Digital Filter Frequency Response – 192kHz
w
PARAMETER
Passband
Passband ripple
Stopband
Stopband Attenuation
Group Delay
DAC Filter
Passband
Passband ripple
Stopband
Stopband Attenuation
Group Delay
ADC Filter
-100
-120
-20
-40
-60
-80
-20
-40
-60
-80
0
0
0
0
– 44.1, 48 and 96kHz
0.5
0.2
1
0.4
Frequency (Fs)
Frequency (Fs)
1.5
TEST CONDITIONS
0.6
f > 0.5465fs
f > 0.555fs
2
±0.01 dB
±0.05 dB
-6dB
-3dB
0.8
2.5
3
1
0.5465fs
0.555fs
MIN
-65
-60
0
Figure 28 DAC Digital Filter Ripple – 44.1, 48 and 96kHz
Figure 30 DAC Digital filter Ripple - 192kHz
-0.05
-0.15
0.15
0.05
-0.1
-0.2
-0.2
-0.4
-0.6
-0.8
0.2
0.1
0.2
-1
0
0
0
0
0.487fs
0.5fs
TYP
22
16
0.05
0.05
0.1
0.1
0.15
0.15
0.4535fs
0.444fs
±0.01
±0.05
MAX
0.2
0.2
Frequency (Fs)
Frequency (Fs)
0.25
0.25
0.3
0.3
UNIT
PD Rev 4.2 March 2008
dB
dB
dB
dB
fs
fs
0.35
0.35
0.4
0.4
WM8770
0.45
0.45
0.5
0.5
45