wm9709 Wolfson Microelectronics plc, wm9709 Datasheet - Page 8

• Manufacturer Part Number: wm9709
• Description: Ac-link Interface Audio Dac
• Manufacturer: Wolfson Microelectronics plc

WM9709
DIGITAL FILTER RESPONSE
TERMINOLOGY
1.
2.
Figure 6 Digital Filter Frequency Response – 48kHz
w
PARAMETER
Passband
Stopband
Passband ripple
Stopband Attenuation
Stop band attenuation (dB) - Is the degree to which the frequency spectrum is attenuated (outside the audio band).
Pass-Band Ripple - Any variation of the frequency response in the pass-band region.
-100
-120
-20
-40
-60
-80
0
0
0.5
1
Frequency (Fs)
The WM9709 digital filter response is guaranteed by design but is not tested in production.
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
1.5
SYMBOL
2
2.5
TEST CONDITIONS
f > 0.555fs
3
0.05 dB
-3dB
Figure 7 Digital Filter Ripple – 48kHz
-0.05
-0.15
0.15
0.05
-0.1
-0.2
0.2
0.1
0
0
SYMBOL
trise
trise
tfall
tfall
trise
trise
trise
tfall
0.05
SYNC
DOUT
DOUT
SYNC
CLK
CLK
DIN
DIN
0.444fs
MIN
0.1
0.15
MIN
2
2
2
2
2
2
2
2
0.2
Frequency (Fs)
0.487fs
TYP
0.05
0.25
TYP
0.3
PD Rev 1.3 February 2003
0.35
MAX
-60
MAX
0.4
6
6
6
6
6
6
6
6
Production Data
0.45
0.5
UNIT
UNIT
dB
dB
dB
ns
ns
ns
ns
ns
ns
ns
ns
8