AK5720 Datasheet, PDF (8/25 Pages) Asahi Kasei Microsystems – 96kHz 24-Bit ADC

[AK5720]
9. Filter Characteristics (fs=48kHz)
(Ta=25C; VA=VD=2.7  5.5V, fs=48kHz)
Parameter
Symbol
min
typ
max
Unit
ADC Digital Filter (Decimation LPF): SHARP ROLL-OFF(FSEL pin=“L”)
Passband (Note 5)
±0.16dB
PB
0
-
18.8
kHz
0.28dB
-
20.0
-
kHz
3.0dB
-
22.8
-
kHz
Stopband (Note 5)
SB
28.4
-
-
kHz
Stopband Attenuation
SA
71
-
-
dB
Group Delay Distortion 0 ~ 20.0kHz
GD
-
0
-
1/fs
Group Delay (Note 6)
GD
-
15.5
-
1/fs
ADC Digital Filter (Decimation LPF): SHORT DELAY SHARP ROLL-OFF FILTER(FSEL
pin=“H”)
Passband (Note 5)
±0.16dB
PB
0
-
18.8
kHz
0.28dB
-
20.0
-
kHz
3.0dB
-
22.8
-
kHz
Stopband (Note 5)
SB
28.4
-
kHz
Stopband Attenuation
SA
72
-
dB
Group Delay Distortion 0 ~ 20.0kHz
GD
-
-
2.4
1/fs
Group Delay (Note 6)
GD
-
5.5
-
1/fs
ADC Digital Filter (HPF):
Frequency Response
3.0dB
FR
-
1.0
-
Hz
0.5dB
-
2.5
-
Hz
(Note 5)
0.1dB
-
6.5
-
Hz
Note 5. The passband and stopband frequencies scale with fs.
For example, PB=0.45 × fs(@0.1dB).
Note 6. The calculated delay time induced by digital filtering. This time is from the input of an analog signal to
the setting of 24bit data both channels to the output register.
MS1641-E-02
-8-
2014/12