ASAHI KASEI
AKM CONFIDENTIAL
[AK4366]
FILTER CHARACTERISTICS
(Ta=25°C; VDD, HVDD=2.2
∼
3.6V; fs=44.1kHz; De-emphasis = “OFF”)
Parameter
Symbol
min
typ
max
Units
DAC Digital Filter:
(Note 8)
Passband
-0.05dB (Note 9)
PB
0
-
20.0
kHz
-6.0dB
-
22.05
-
kHz
Stopband
(Note 9)
SB
24.1
-
-
kHz
Passband Ripple
PR
-
-
dB
±0.02
Stopband Attenuation
SA
54
-
-
dB
Group Delay
(Note 10)
GD
-
20.8
-
1/fs
Group Delay Distortion
-
0
-
µs
∆GD
DAC Digital Filter + Analog Filter:
(Note 8) (Note 11)
Frequency Response
FR
-
-
dB
0
∼
20.0kHz
±0.5
BOOST Filter:
(Note 11) (Note 12)
Frequency Response
20Hz
FR
-
-
dB
5.76
MIN
100Hz
-
-
dB
2.92
1kHz
-
-
dB
0.02
20Hz
FR
-
-
dB
10.80
MID
100Hz
-
-
dB
6.84
1kHz
-
-
dB
0.13
20Hz
FR
-
-
dB
16.06
MAX 100Hz
-
-
dB
10.54
1kHz
-
-
dB
0.37
Note 8. BOOST OFF (BST1-0 = “00”)
Note 9. The passband and stopband frequencies scale with fs.
For example, PB=0.4535*fs(@±0.05dB), SB=0.546*fs(@-54dB).
Note 10. This is the calculated delay time caused by digital filtering. This time is measured from the setting of the 24bit
data of both channels to the input registers to the output of the analog signal.
Note 11. DAC
à
HPL, HPR
Note 12. These frequency responses scale with fs. If high-level signal is input, the AK4366 clips at low frequency.
Boost Filter (fs=44.1kHz)
20
15
Level [dB]
MID
10
MIN
5
0
-5
10
100
Frequency [Hz]
1000
10000
MAX
Figure 2. Boost Frequency (fs=44.1kHz)
REV 0.6
-7-
2003/3
AKM [ ASAHI KASEI MICROSYSTEMS ]
