[AK4618]
FILTER CHARACTERISTICS (fs=192kHz)
(Ta= -40 +105C; AVDD1, AVDD2= TVDD=3.0 3.6V)
Parameter Symbol
DAC Digital Filter (LPF): Sharp roll-off mode (DEM=OFF; SD_DA bit=“0” ; SLOW bit=“0”)
Min.
Typ.
Max.
Unit
±0.06dB
6.0dB
PB
0
-
-
96.0
-
87.2
-
-
kHz
kHz
kHz
dB
dB
Passband
(Note 8)
Stopband
Passband Ripple
SB
PR
SA
104.8
-0.06
52
+0.06
Stopband Attenuation
Group Delay Distortion 0 ~ 80.0kHz
-
0
19.3
-
-
-
-
-
1/fs
1/fs
GD
GD
Group Delay
(Note 10)
DAC Digital Filter + Analog Filter:
Frequency Response 0 ~ 80.0kHz (Note 11)
FR
-
-1.0
-
dB
DAC Digital Filter (LPF): Slow roll-off mode (DEM=OFF; SD_DA bit=“0” ; SLOW bit=“1”)
±0.06dB
6.0dB
0
-
39.2
-
Passband
(Note 9)
PB
kHz
kHz
90.0
Stopband
SB
PR
SA
kHz
dB
160.4
-4.0
50
Passband Ripple
+0.06
Stopband Attenuation
Group Delay Distortion 0 ~ 80.0kHz
Group Delay
dB
1/fs
1/fs
0
6.8
GD
GD
(Note 10)
DAC Digital Filter + Analog Filter:
Frequency Response 0 ~ 80.0kHz (Note 11)
FR
-5.0
dB
DAC Digital Filter (LPF): Short delay Sharp roll-off mode (DEM=OFF; SD_DA bit=“1”; SLOW bit=“0”)
±0.06dB
6.0dB
Passband
(Note 8)
PB
0
-
-
96.0
-
87.2
-
-
kHz
kHz
kHz
Stopband
SB
PR
SA
GD
GD
104.8
Passband Ripple
dB
dB
1/fs
1/fs
-0.06
52
-
+0.06
Stopband Attenuation
Group Delay Distortion 0 ~ 80.0kHz
-
-
6.2
-
1.7
-
Group Delay
(Note 10)
-
DAC Digital Filter + Analog Filter:
Frequency Response 0 ~ 80.0kHz (Note 11)
FR
-1.0
dB
DAC Digital Filter (LPF): Short delay Slow roll-off mode (DEM=OFF; SD_DA bit=“1” ; SLOW bit=“1”)
±0.06dB
6.0dB
Passband
(Note 9)
PB
0
-
-
90.0
-
39.2
-
-
kHz
kHz
kHz
dB
dB
1/fs
1/fs
Stopband
Passband Ripple
SB
PR
SA
160.4
-4.0
50
-
+0.06
Stopband Attenuation
Group Delay Distortion 0 ~ 80.0kHz
-
-
-
0.5
-
GD
GD
Group Delay
(Note 10)
-
5.8
DAC Digital Filter + Analog Filter:
Frequency Response 0 ~ 80.0kHz (Note 11)
FR
-
-5.0
-
dB
Note 8. The passband and stopband frequencies scale with fs (sampling frequency). For example, ADC: Passband
(0.1dB) = 0.375 x fs, DAC: Passband (0.06dB) = 0.454 x fs (@ fs=48kHz).
Note 9. The passband and stopband frequencies scale with fs (sampling frequency). For example, DAC: Passband
(0.06dB) = 0.204 x fs (@ fs=48kHz).
Note 10. The calculated delay time is resulting from digital filtering. For the ADC, this time is from the input of an analog
signal to the setting of 24bit data for both channels to the ADC output register. For the DAC, this time is from
setting the 24 bit data both channels at the input register to the output of an analog signal.
Note 11. The reference frequency is 1kHz.
015000617-E-00
2015/01
- 12 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
