[AK4426]
SHARP ROLL-OFF FILTER CHARACTERISTICS
(Ta = 25°C; VDD=AVDD = +4.5
∼
+5.5V; fs = 44.1 kHz; DEM = OFF; SLOW = “0”)
Parameter
Symbol
min
typ
max
Digital filter
PB
0
20.0
Passband
±0.05dB
-
22.05
-
–6.0dB
Stopband (Note
SB
24.1
Passband Ripple
PR
±
0.02
Stopband Attenuation
SA
54
Group Delay (Note
GD
-
19.3
-
Digital Filter + LPF
Frequency Response 20.0kHz fs=44.1kHz
FR
-
-
±
0.05
40.0kHz fs=96kHz
FR
-
-
±
0.05
80.0kHz fs=192kHz
FR
-
-
±
0.05
Note 11. The passband and stopband frequencies scale with fs(system sampling rate).
For example, PB=0.4535×fs (@±0.05dB), SB=0.546×fs.
Note 12. Calculated delay time caused by digital filter. This time is measured from setting the 16/24bit data
of both channels to input register to the output of the analog signal.
SLOW ROLL-OFF FILTER CHARACTERISTICS
(Ta = 25°C; VDD = AVDD = +4.5
∼
+5.5V; fs = 44.1kHz; DEM = OFF; SLOW = “1”)
Parameter
Digital Filter
±0.04dB
-3.0dB
Stopband
Passband Ripple
Stopband Attenuation
Group Delay
Passband
Digital Filter + LPF
FR
-
+0/-5
20.0kHz fs=44.kHz
40.0kHz fs=96kHz
FR
-
+0/-4
80.0kHz fs=192kHz
FR
-
+0/-5
Note 13. The passband and stopband frequencies scale with fs(system sampling rate).
For example, PB=0.185×fs (@±0.04dB), SB=0.888×fs.
Frequency Response
-
-
-
PB
SB
PR
SA
GD
0
-
39.2
72
-
18.2
8.1
-
±
0.005
19.3
-
Symbol
min
typ
max
Units
kHz
kHz
kHz
dB
dB
1/fs
dB
dB
dB
Units
kHz
kHz
kHz
dB
dB
1/fs
dB
dB
dB
MS1176-E-02
-7-
2011/03
AKM [ ASAHI KASEI MICROSYSTEMS ]
