ASAHI KASEI
[AK5385B]
FILTER CHARACTERISTICS (fs=48kHz)
(Ta=25°C; AVDD=4.75 ∼ 5.25V; DVDD=3.0 ∼ 5.25V; DFS1 = “L”, DFS0 = “L”)
Parameter
Symbol
min
typ
max
Units
ADC Digital Filter (Decimation LPF):
Passband
(Note 8) −0.005dB
−0.02dB
PB
0
-
-
-
21.5
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
µs
22.038
22.2
24.0
-
-
-
−0.06dB
−6.0dB
Stopband
SB
PR
SA
GD
∆GD
26.5
Passband Ripple
Stopband Attenuation
Group Delay
±0.005
100
(Note 9)
43.2
0
Group Delay Distortion
ADC Digital Filter (HPF):
Frequency Response (Note 8) −3dB
FR
1.0
6.5
Hz
Hz
−0.1dB
FILTER CHARACTERISTICS (fs=96kHz)
(Ta=25°C; AVDD=4.75 ∼ 5.25V; DVDD=3.0 ∼ 5.25V; DFS1 = “L”, DFS0 = “H”)
Parameter
Symbol
min
typ
max
Units
ADC Digital Filter (Decimation LPF):
Passband
(Note 8) −0.005dB
−0.02dB
PB
0
-
-
-
43.0
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
µs
44.081
44.5
48.0
-
-
-
−0.06dB
−6.0dB
Stopband
SB
PR
SA
GD
∆GD
53.0
Passband Ripple
Stopband Attenuation
Group Delay
±0.005
100
(Note 9)
43.1
0
Group Delay Distortion
ADC Digital Filter (HPF):
Frequency Response (Note 8) −3dB
FR
2.0
13.0
Hz
Hz
−0.1dB
Note 8. The passband and stopband frequencies scale with fs. The reference frequency of these responses is 1kHz.
Note 9. 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.
MS0406-E-00
2005/08
- 9 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
