ASAHI KASEI
AKM CONFIDENTIAL
[AK4566]
FILTER CHARACTERISTICS
(Ta=25°C; AVDD, DVDD, HVDD=2.5
∼
3.6V; fs=44.1kHz; DEM=OFF; BOOST=OFF)
Parameter
Symbol
min
typ
max
Units
ADC Digital Filter (LPF):
kHz
17.4
Passband
(Note 15)
PB
0
±0.1dB
kHz
-
20.0
-
-1.0dB
kHz
-
21.1
-
-3.0dB
Stopband
(Note 15)
SB
27.0
kHz
Passband Ripple
PR
dB
±0.1
Stopband Attenuation
SA
65
dB
Group Delay
(Note 16)
GD
-
17.0
-
1/fs
Group Delay Distortion
0
∆GD
µs
ADC Digital Filter (HPF):
Hz
3.4
FR
Frequency Response (Note 15) -3dB
Hz
10
-0.5dB
Hz
22
-0.1dB
DAC Digital Filter:
(Note 14)
Passband
(Note 15)
±0.01dB
PB
0
20.0
kHz
-
22.05
-
kHz
−6.0dB
Stopband
(Note 15)
SB
24.1
kHz
Passband Ripple
PR
dB
±0.06
Stopband Attenuation
SA
43
dB
Group Delay
(Note 16)
GD
-
16.8
-
1/fs
Group Delay Distortion
0
∆GD
µs
DAC Digital Filter + Analog Filter:
(Note 14)(Note 17)
FR
-
-
dB
Frequency Response
0
∼
20.0kHz
±0.5
BOOST Filter:
(Note 17) (Note 18)
Frequency Response
20Hz
FR
-
-
dB
5.74
100Hz
-
-
dB
MIN
2.92
1kHz
-
-
dB
0
20Hz
FR
-
-
dB
5.94
100Hz
-
-
dB
MID
4.71
1kHz
-
-
dB
0.14
20Hz
FR
-
-
dB
16.04
100Hz
-
-
dB
MAX
10.55
1kHz
-
-
dB
0.3
Note 14. BOOST OFF (BST1-0 = “00”)
Note 15. The passband and stopband frequencies scale with fs.
For example (DAC), PB=0.4535*fs(@±0.05dB), SB=0.546*fs(@-43dB).
Note 16. 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. This time also includes
group delay of HPF. For DAC, this time is from setting the 20 bit data of both channels on input register to the
output of analog signal.
Note 17. DACL
à
HPL, DACR
à
HPR, DACL/R
à
MOUT.
Note 18. These frequency responses scale with fs. If high-level signal is input, the AK4566 clips at low frequency.
REV 0.5
-8-
2002/2
AKM [ ASAHI KASEI MICROSYSTEMS ]
