
ASAHI KASEI
[AK4620A]
MS0368-E-00
2004/12
- 9 -
ADC FILTER CHARACTERISTICS (fs=44.1kHz)
(Ta=25
°
C; VA=4.75
~
5.25V; VD=3.0
~
3.6V, VT=3.0
~
5.25V; Normal Speed Mode)
Parameter
ADC Digital Filter (Decimation LPF):
Passband (Note 17)
6.0dB
Stopband (Note 17)
Passband Ripple
Stopband Attenuation
Group Delay (Note 18)
Group Delay Distortion
ADC Digital Filter (HPF):
Frequency Response (Note 17)
3dB
0.1dB
ADC FILTER CHARACTERISTICS (fs=96kHz)
(Ta=25
°
C; VA=4.75
~
5.25V; VD=3.0
~
3.6V, VT=3.0
~
5.25V; Double Speed Mode)
Parameter
ADC Digital Filter (Decimation LPF):
Passband (Note 17)
6.0dB
Stopband (Note 17)
Passband Ripple
Stopband Attenuation
Group Delay (Note 18)
Group Delay Distortion
ADC Digital Filter (HPF):
Frequency Response (Note 17)
3dB
0.1dB
FILTER CHARACTERISTICS (fs=192kHz)
(Ta=25
°
C; VA=4.75
~
5.25V; VD=3.0
~
3.6V, VT=3.0
~
5.25V; Quad Speed Mode)
Parameter
ADC Digital Filter (Decimation LPF):
Passband (Note 17)
6.0dB
Stopband (Note 17)
Passband Ripple
Stopband Attenuation
Group Delay (Note 18)
Group Delay Distortion
ADC Digital Filter (HPF):
Frequency Response (Note 17)
3dB
0.1dB
Note 17. The passband and stopband frequencies scale with fs. The reference frequency of these responses is 1kHz.
Note 18. The calculated delay time induced by digital filtering. This time is from the input of an analog signal to the
setting of 24bit data both channels to the ADC output register for ADC.
Symbol
min
typ
max
Units
0.005dB
0.02dB
0.06dB
PB
SB
PR
SA
GD
GD
0
-
-
-
20.25
20.4
22.05
43.2
0
19.8
-
-
-
±
0.005
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
μ
s
24.3
100
FR
0.9
6.0
Hz
Hz
Symbol
min
typ
max
Units
0.005dB
0.02dB
0.06dB
PB
SB
PR
SA
GD
GD
0
-
-
-
44.08
44.5
48.0
43.1
0
43.0
-
-
-
±
0.005
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
μ
s
53.0
100
FR
2.0
13.0
Hz
Hz
Symbol
min
typ
max
Units
0.005dB
0.02dB
0.06dB
PB
SB
PR
SA
GD
GD
0
-
-
-
88.18
89.0
96.0
38.2
0
86.0
-
-
-
±
0.005
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
μ
s
106.0
100
FR
4.0
26.0
Hz
Hz