ASAHI KASEI
[AK4367]
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 10)
Passband
PB
0
-
20.0
kHz
−0.05dB
(Note 11)
-
22.05
-
kHz
−6.0dB
Stopband
(Note 11)
SB
24.1
-
-
kHz
Passband Ripple
PR
-
-
dB
±0.02
Stopband Attenuation
SA
54
-
-
dB
Group Delay
(Note 12)
GD
-
20.8
-
1/fs
Group Delay Distortion
-
0
-
µs
∆GD
DAC Digital Filter + Analog Filter:
(Note 10) (Note 13)
Frequency Response
FR
-
-
dB
0
∼
20.0kHz
±0.5
Analog Filter:
(Note 14)
Frequency Response
FR
-
-
dB
0
∼
20.0kHz
±1.0
BOOST Filter:
(Note 13) (Note 15)
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 10. BOOST OFF (BST1-0 bit = “00”)
Note 11. The passband and stopband frequencies scale with fs.
For example, PB=0.4535*fs(@±0.05dB), SB=0.546*fs(@−54dB).
Note 12. 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 13. DAC HPL, HPR, MOUT
Note 14. MIN HPL/HPR/MOUT, LIN HPL/MOUT, RIN HPR/MOUT
Note 15. These frequency responses scale with fs. If high-level signal is input, the AK4367 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)
MS0247-E-02
-8-
2005/10
AKM [ ASAHI KASEI MICROSYSTEMS ]
