WM9709 データシートの表示（PDF） - Wolfson Microelectronics plc
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WM9709 Datasheet PDF : 18 Pages
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WM9709
PARAMETER
BITCLK rise time
BITCLK fall time
SYNC rise time
SYNC fall time
SDATAIN rise time
SDATAIN fall time
SDATAOUT rise time
SDATAOUT fall time
SYMBOL
triseCLK
tfallCLK
triseSYNC
tfallSYNC
triseDIN
triseDIN
triseDOUT
tfallDOUT
MIN
2
2
2
2
2
2
2
2
TYP
Production Data
MAX
6
6
6
6
6
6
6
6
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
DIGITAL FILTER RESPONSE
The WM9709 digital filter response is guaranteed by design but is not tested in production.
PARAMETER
Passband
Stopband
Passband ripple
Stopband Attenuation
SYMBOL
TEST CONDITIONS
±0.05 dB
-3dB
MIN
0.444fs
f > 0.555fs
TYP
0.487fs
±0.05
MAX
-60
UNIT
dB
dB
dB
TERMINOLOGY
1. Stop band attenuation (dB) - Is the degree to which the frequency spectrum is attenuated (outside the audio band).
2. Pass-Band Ripple - Any variation of the frequency response in the pass-band region.
0
-20
-40
-60
-80
-100
-120
0
0.5
1
1.5
2
2.5
Frequency (Fs)
Figure 6 Digital Filter Frequency Response – 48kHz
0.2
0.15
0.1
0.05
0
-0.05
-0.1
-0.15
-0.2
3
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
Frequency (Fs)
Figure 7 Digital Filter Ripple – 48kHz
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PD Rev 1.3 February 2003
8
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