
[AK4650]
MS0502-E-01
2007/04
- 15 -
FILTER CHARACTERISTICS
(Ta=25
°
C; AVDD, HVDD, DVDD, TSVDD=2.7
~
3.6V; fs=48kHz; DEM=OFF)
Parameter
ADC Digital Filter (Decimation LPF):
Passband (Note 30)
±
0.1dB
1.0dB
3.0dB
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 31)
Group Delay Distortion
ADC Digital Filter (HPF):
Frequency Response (Note 30)
3.0dB
0.1dB
DAC Digital Filter:
Passband (Note 30)
±
0.1dB
6.0dB
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 31)
DAC Digital Filter + SCF:
Frequency Response: 0
~
20.0kHz
BOOST Filter:
(Note 32)
MIN
20Hz
100Hz
1kHz
MID
20Hz
100Hz
1kHz
MAX
20Hz
100Hz
1kHz
Note 30. The passband and stopband frequencies scale with fs (system sampling rate).
For example, ADC is PB=0.454
×
fs (@
1.0dB). The reference frequency of these responses is 1kHz.
Note 31. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the
16-bit data of both channels to the output register of the ADC. This time includes the group delay of the HPF. For
the DAC, this time is from setting the 16-bit data of both channels from the input register to the output of analog
signal.
Note 32. These frequency responses scale with fs. If a high-level and low frequency signal is input, the analog output clips
to the full-scale.
Symbol
min
typ
max
Units
PB
SB
PR
SA
GD
Δ
GD
0
-
-
-
18.9
-
-
-
±
0.1
-
-
-
kHz
kHz
kHz
kHz
dB
dB
1/fs
μ
s
21.8
23.0
-
-
-
17.0
0
29.4
-
65
-
-
FR
-
-
1.0
6.5
-
-
Hz
Hz
PB
SB
PR
SA
GD
0
-
-
21.3
-
-
±
0.01
-
-
kHz
kHz
kHz
dB
dB
1/fs
24.0
-
-
-
16.8
25.2
-
59
-
FR
-
±
1.0
-
dB
FR
FR
FR
-
-
-
-
-
-
-
-
-
5.80
3.17
0.03
10.85
7.23
0.18
16.14
11.05
0.47
-
-
-
-
-
-
-
-
-
dB
dB
dB
dB
dB
dB
dB
dB
dB
Frequency Response