ASAHI KASEI
[AK4388]
FILTER CHARACTERISTICS
(Ta = 25°C; VDD = 4.5
∼
5.5V; fs = 44.1kHz)
Parameter
Symbol
min
typ
max
Units
Digital filter
(DEM = OFF)
PB
0
20.0
kHz
Passband
±0.05dB
(Note 9)
-
22.05
-
kHz
–6.0dB
Stopband
(Note 9)
SB
24.1
kHz
dB
Passband Ripple
PR
±
0.02
Stopband Attenuation
SA
54
dB
Group Delay
(Note 10)
GD
-
19.3
-
1/fs
De-emphasis Filter (DEM = ON)
De-emphasis Error
fs = 32kHz
-
-
–1.5/0
dB
(Relative to 0Hz)
fs = 44.1kHz
-
-
–0.2/+0.2
dB
fs = 48kHz
-
-
0/+0.6
dB
Digital Filter + LPF
(DEM = OFF)
Frequency Response 20.0kHz fs=44.1kHz
FR
-
-
dB
±
0.2
40.0kHz fs=96kHz
FR
-
-
dB
±
0.3
80.0kHz fs=192kHz
FR
-
-
dB
+0.1/-0.6
Notes: 9. The passband and stopband frequencies scale with fs(system sampling rate).
For example, PB=0.4535×fs (@±0.05dB), SB=0.546×fs.
10. The calculating delay time which occurred by digital filtering. This time is from setting the 16/24bit data
of both channels to input register to the output of analog signal.
MS0485-E-01
-5-
2006/07
AKM [ ASAHI KASEI MICROSYSTEMS ]
