
ASAHI KASEI
[AK4665A]
MS0440-E-01
2006/05
- 8 -
FILTER CHARACTERISTICS
(Ta=25
°
C; AVDD, DVDD, HVDD=2.6
~
3.6V; TVDD=1.6
~
3.6V; fs=44.1kHz; DEM=OFF; BOOST=OFF)
Parameter
Symbol
ADC Digital Filter (LPF):
Passband (Note 13)
±
0.16dB
PB
0.66dB
1.1dB
6.9dB
Stopband (Note 13)
SB
Passband Ripple
PR
Stopband Attenuation
SA
Group Delay (Note 14)
GD
Group Delay Distortion
GD
ADC Digital Filter (HPF):
Frequency Response (Note 13)
3dB
FR
0.5dB
0.1dB
DAC Digital Filter:
(Note 15)
Passband (Note 13)
±
0.1dB
PB
0.7dB
6.0dB
Stopband (Note 13)
SB
Passband Ripple
PR
Stopband Attenuation
SA
Group Delay (Note 14)
GD
Group Delay Distortion
GD
DAC Digital Filter + Analog Filter:
(Note 15)
Frequency Response: 0
~
20.0kHz
FR
Analog Filter:
(Note 16)
Frequency Response: 0
~
20.0kHz
FR
BOOST Filter:
(Note 17)
Frequency Response
20Hz
FR
MIN
100Hz
1kHz
20Hz
FR
MID
100Hz
1kHz
20Hz
FR
MAX
100Hz
1kHz
Note 13. The passband and stopband frequencies scale with fs.
For example (DAC), PB=0.44*fs(@
±
0.1dB), SB=0.57*fs(@
59dB).
Note 14. This is the calculated delay time caused by digital filtering. This time is measured from the input of analog signal
to setting the 20 bit data of both channels on input register to the output register of ADC. For DAC, this time is
from setting the 20 bit data of both channels on input register to the output of analog signal.
Note 15. BOOST OFF (BST1-0 bits = “00”)
Note 16. LIN
→
HPL, RIN
→
HPR, MIN
→
HPL/HPR.
Note 17. These frequency responses scale with fs. If high-level signal is input, the AK4665A clips at low frequency.
min
typ
max
Units
0
-
-
-
-
17.3
-
-
-
-
±
0.1
-
-
-
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
μ
s
19.4
19.9
22.1
-
-
-
17
0
26.1
-
73
-
-
-
-
-
3.4
10
22
-
-
-
Hz
Hz
Hz
0
-
-
-
19.6
-
-
-
±
0.01
-
-
-
kHz
kHz
kHz
kHz
dB
dB
1/fs
μ
s
20.0
22.05
-
-
-
17.5
0
25.2
-
59
-
-
-
±
1.0
-
dB
-
±
1.0
-
dB
-
-
-
-
-
-
-
-
-
5.76
2.92
0.02
10.80
6.84
0.13
16.06
10.54
0.37
-
-
-
-
-
-
-
-
-
dB
dB
dB
dB
dB
dB
dB
dB
dB