AK7738VQ Datasheet, PDF (24/42 Pages) Asahi Kasei Microsystems – Multi DSP with 5ch ADC + 4ch DAC + 8ch SRC

[AK7738]
1-4 Short Delay Slow Roll-Off Filter (ADSD bit = “1”, ADSL bit = “1”)
fs=48kHz
Parameter
Symbol
min
typ
SHORT DELAY SLOW ROLL-OFF
Passband (Note 29)
0dB ~ -0.074dB
-6.0dB
PB
PB
0
21.9
Stopband
(Note 29)
SB
36.5
Stopband Attenuation
SA
85
Group Delay Distortion : 0Hz~20kHz
GD
Group Delay
(Note 30)
GD
5
ADC Digital Filter(HPF)
Frequency Response
-3.0dB
FR
1.0
max
Unit
12.5
kHz
kHz
kHz
dB
2.6
1/fs
1/fs
Hz
fs=96kHz
Parameter
Symbol
min
typ
SHORT DELAY SLOW ROLL-OFF
Passband (Note 29)
0dB ~ -0.074dB
-6.0dB
PB
PB
0
43.7
Stopband
(Note 29)
SB
73
Stopband Attenuation
SA
85
Group Delay Distortion : 0Hz~40kHz
GD
Group Delay
(Note 30)
GD
5
ADC Digital Filter(HPF)
Frequency Response
-3.0dB
FR
1.9
max
Unit
25
kHz
kHz
kHz
dB
2.6
1/fs
1/fs
Hz
fs=192kHz
Parameter
Symbol
min
typ
max
Unit
SHORT DELAY SLOW ROLL-OFF
Passband (Note 29)
0dB ~ -0.7dB
-6.0dB
PB
PB
0
49.9
kHz
77.7
kHz
Stopband
(Note 29)
SB
145.9
kHz
Stopband Attenuation
SA
85
dB
Group Delay Distortion : 0Hz~40kHz
GD
0.5
1/fs
Group Delay
(Note 30)
GD
6
1/fs
ADC Digital Filter(HPF)
Frequency Response
-3.0dB
FR
3.88
Hz
Note 29. The passband and stopband frequencies are proportional to fs (sampling rate). High-pass filter
characteristics are not included.
Note 30. Delay time caused by the digital filter calculation. This time is measured from an analog signal
input until 24-bit data of both channels are set into the output register.
015000122-E-00-PB
- 24 -
2015/01