AK4561 Datasheet, PDF (10/48 Pages) Asahi Kasei Microsystems – 16bit CODEC with built-in ALC and MIC/HP-Amp

ASAHI KASEI
AKM CONFIDENTIAL
[AK4561]
FILTER CHARACTERISTICS
(Ta=25°C; VA=VD=2.6 ∼ 3.3V; fs=48kHz; De-emphasis = OFF)
Parameter
Symbol
min
typ
max
Units
ADC Digital Filter (LPF):
Passband (Note 25)
±0.1dB
PB
0
18.9
kHz
-1.0dB
-
21.8
-
kHz
-3.0dB
-
23.0
-
kHz
Stopband (Note 25)
SB
29.4
kHz
Passband Ripple
Stopband Attenuation
PR
SA
65
±0.1
dB
dB
Group Delay (Note 26)
GD
-
17.0
-
1/fs
Group Delay Distortion
∆GD
0
us
ADC Digital Filter (HPF):
Frequency Response (Note 25) -3.0dB
FR
-
3.7
-
Hz
-0.56dB
-
10
-
Hz
-0.15dB
-
20
-
Hz
DAC Digital Filter:
Passband (Note 25)
±0.1dB
PB
0
21.7
kHz
-6.0dB
-
24.0
-
kHz
Stopband (Note 25)
SB
26.2
kHz
Passband Ripple
PR
±0.06
dB
Stopband Attenuation
SA
43
dB
Group Delay (Note 26)
GD
-
14.8
-
1/fs
DAC Digital Filter + Analog Filter:
Frequency Response
0 ∼ 20.0kHz
FR
±0.5
dB
Note 25. 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 26. The calculating delay time which occured by digital filtering, This time is from the input of analog signal to
setting the 16 bit data of both channels on input register to the output register of ADC. And this time include
group delay of HPF. For DAC, this time is from setting the 16 bit data of both channels on input register to the
output of analog signal.
Rev. 0.9
- 10 -
2000/09