ASAHI KASEI
[AK4564]
FILTER CHARACTERISTICS
(Ta=25°C; AVDD, DVDD, SVDD=2.6 ~ 3.6V, MVDD, HVDD=2.6~ 5.5V; fs=48kHz; De-emphasis = OFF,
Digital EQ/HPF/LPF = OFF)
Parameter
ADC Digital Filter (LPF):
Passband (Note 28)
Symbol
min
typ
max
Units
±0.1dB
-1.0dB
-3.0dB
PB
0
-
-
18.9
-
-
kHz
kHz
kHz
kHz
dB
21.8
23.0
Stopband (Note 28)
Passband Ripple
SB
PR
29.4
±0.1
Stopband Attenuation
Group Delay (Note 29)
Group Delay Distortion
SA
GD
DGD
65
-
dB
1/fs
ms
19.0
0
-
ADC Digital Filter (HPF):
Frequency Response (Note 28) -3.0dB
FR
-
-
-
3.7
10
20
-
-
-
Hz
Hz
Hz
-0.56dB
-0.15dB
DAC Digital Filter:
Passband (Note 28)
±0.1dB
-6.0dB
PB
0
-
26.2
21.7
-
kHz
kHz
kHz
dB
dB
1/fs
24.0
Stopband (Note 28)
Passband Ripple
Stopband Attenuation
Group Delay (Note 29)
SB
PR
SA
GD
±0.06
43
-
15.8
-
DAC Digital Filter + Analog Filter: (Note 30)
Frequency Response 0 ~ 20.0kHz
FR
dB
±0.5
Note 28. The passband and stopband frequencies scale with fs (system sampling rate).
For example, ADC is PB=0.454*fs (@•1.0dB), DAC is PB=0.454*fs (@•0.1dB).
Note 29. The calculated delay time caused by digital filtering. This time is from the input of an analog signal to setting the
16bit data of both channels to the output register of the ADC and includes the group delay of the HPF.
For DAC, this time is from setting the 16bit data of both channels on input register to the output of analog signal.
Note 30. DAC à LOUT1/ROUT1, LOUT2/ROUT2
MS0140-E-01
2002/07
- 10 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
