AK4538 Datasheet, PDF (10/70 Pages) Asahi Kasei Microsystems – 16Bit DS CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4538]
FILTER CHARACTERISTICS
(Ta=−10 ∼ 70°C; AVDD, DVDD, PVDD, HVDD=2.4 ∼ 3.6V; fs=44.1kHz; DEM=OFF)
Parameter
Symbol
min
typ
ADC Digital Filter (Decimation LPF):
Passband
(Note 22) ±0.1dB
PB
−1.0dB
−3.0dB
0
-
20.0
-
21.1
Stopband
SB
27.0
Passband Ripple
PR
Stopband Attenuation
SA
65
Group Delay
(Note 23)
GD
17.0
Group Delay Distortion
∆GD
0
ADC Digital Filter (HPF):
Frequency Response
−3.0dB
FR
3.4
(Note 22)
−0.5dB
10
−0.1dB
22
DAC Digital Filter:
Passband
(Note 22) ±0.1dB
PB
−6.0dB
0
-
22.05
Stopband
SB
24.1
Passband Ripple
PR
Stopband Attenuation
SA
43
Group Delay
(Note 23)
GD
16.8
DAC Digital Filter + SCF:
Frequency Response: 0 ∼ 20.0kHz
FR
±0.5
BOOST Filter:
(Note 24)
Frequency Response MIN 20Hz
FR
-
5.74
100Hz
-
2.92
1kHz
-
0.0
MID 20Hz
FR
-
5.94
100Hz
-
4.71
1kHz
-
0.14
MAX 20Hz
FR
-
16.04
100Hz
-
10.55
1kHz
-
0.3
max
17.4
-
-
±0.1
20.0
-
±0.06
-
-
-
-
-
-
-
-
-
Units
kHz
kHz
kHz
kHz
dB
dB
1/fs
µs
Hz
Hz
Hz
kHz
kHz
kHz
dB
dB
1/fs
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Note 22. 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 (@-0.01dB).
Note 23. 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 from the input register 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 24. These frequency responses scale with fs. If a high-level and low frequency signal is input, the analog output clips
to the full-scale.
MS0198-E-01
- 10 -
2003/5