ASAHI KASEI
[AK4620B]
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
Symbol
min
typ
ADC Digital Filter (Decimation LPF):
Passband
(Note 17)
−0.005dB
PB
0
−0.02dB
-
20.25
−0.06dB
-
20.4
−6.0dB
-
22.05
Stopband
(Note 17)
SB
24.3
Passband Ripple
PR
Stopband Attenuation
SA
100
Group Delay
(Note 18)
GD
43.2
Group Delay Distortion
∆GD
0
ADC Digital Filter (HPF):
Frequency Response (Note 17)
−3dB
FR
0.9
−0.1dB
6.0
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
Symbol
min
typ
ADC Digital Filter (Decimation LPF):
Passband
(Note 17)
−0.005dB
PB
0
−0.02dB
-
44.08
−0.06dB
-
44.5
−6.0dB
-
48.0
Stopband
(Note 17)
SB
53.0
Passband Ripple
PR
Stopband Attenuation
SA
100
Group Delay
(Note 18)
GD
43.1
Group Delay Distortion
∆GD
0
ADC Digital Filter (HPF):
Frequency Response (Note 17)
−3dB
FR
2.0
−0.1dB
13.0
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
Symbol
min
typ
ADC Digital Filter (Decimation LPF):
Passband
(Note 17)
−0.005dB
PB
0
−0.02dB
-
88.18
-
89.0
−0.06dB
-
96.0
−6.0dB
Stopband
(Note 17)
SB
106.0
Passband Ripple
PR
Stopband Attenuation
SA
100
Group Delay
(Note 18)
GD
38.2
Group Delay Distortion
∆GD
0
ADC Digital Filter (HPF):
Frequency Response (Note 17)
−3dB
FR
4.0
−0.1dB
26.0
max
19.8
-
-
-
±0.005
Units
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
µs
Hz
Hz
max
43.0
-
-
-
±0.005
Units
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
µs
Hz
Hz
max
86.0
-
-
-
±0.005
Units
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
µs
Hz
Hz
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.
MS0401-E-00
-9-
2005/07
AKM [ ASAHI KASEI MICROSYSTEMS ]
