[AK4372]
FILTER CHARACTERISTICS
(Ta=25°C; AVDD = DVDD=1.6
∼
3.6V; fs=44.1kHz; De-emphasis = OFF)
Parameter
Symbol
min
DAC Digital Filter:
Passband (Note
PB
0
−0.05dB
-
−6.0dB
Stopband (Note
SB
24.1
Passband Ripple
PR
-
Stopband Attenuation
SA
54
Group Delay (Note
GD
-
Group Delay Distortion
-
ΔGD
DAC Digital Filter + Analog Filter:
Frequency Response
FR
-
0
∼
20.0kHz
Analog Filter:
Frequency Response
FR
-
0
∼
20.0kHz
BOOST Filter:
Frequency Response
20Hz
FR
-
MIN
100Hz
-
1kHz
-
20Hz
FR
-
MID
100Hz
-
1kHz
-
20Hz
FR
-
MAX 100Hz
-
1kHz
-
typ
-
22.05
-
-
-
22
0
±0.5
±1.0
5.76
2.92
0.02
10.80
6.84
0.13
16.06
10.54
0.37
max
20.0
-
-
±0.02
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Units
kHz
kHz
kHz
dB
dB
1/fs
µs
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Note 15. BOOST OFF (BST1-0 bit = “00”)
Note 16. The passband and stopband frequencies scale with fs (system sampling rate).
For example, PB=0.4535fs(@−0.05dB). SB=0.546fs(@−54dB).
Note 17. This time is from setting the 24-bit data of both channels from the input register to the output of analog signal.
Note 18. DAC HPL, HPR, LOUT, ROUT
Note 19. LIN/MIN HPL/LOUT, RIN/MIN HPR/ROUT
Note 20. These frequency responses scale with fs. If high-level signal is input, the output clips at low frequency.
Boost Filter (fs=44.1kHz)
20
15
MID
Gain [dB]
10
MIN
5
0
-5
10
100
Frequency [Hz]
1000
10000
MAX
Figure 2. Boost Frequency (fs=44.1kHz)
MS0684-E-02
-9-
2008/12
AKM [ ASAHI KASEI MICROSYSTEMS ]
