ASAHI KASEI
[AK4370]
FILTER CHARACTERISTICS
(Ta=25°C; AVDD, DVDD, HVDD=1.6
∼
3.6V; fs=44.1kHz; De-emphasis = “OFF”)
Parameter
Symbol
min
typ
DAC Digital Filter:
Passband (Note 16)
PB
0
-
−0.05dB
-
22.05
−6.0dB
Stopband (Note 16)
SB
24.1
-
Passband Ripple
PR
-
-
Stopband Attenuation
SA
54
-
Group Delay (Note 17)
GD
-
22
Group Delay Distortion
-
0
ΔGD
DAC Digital Filter + Analog Filter:
Frequency Response
FR
-
0
∼
20.0kHz
±0.5
Analog Filter:
Frequency Response
FR
-
0
∼
20.0kHz
±1.0
BOOST Filter:
Frequency Response
20Hz
FR
-
5.76
MIN
100Hz
-
2.92
1kHz
-
0.02
20Hz
FR
-
10.80
MID
100Hz
-
6.84
1kHz
-
0.13
20Hz
FR
-
16.06
MAX 100Hz
-
10.54
1kHz
-
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. LIN1/LIN2/RIN1/RIN2 HPL/HPR/LOUT/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)
MS0595-E-00
-9-
2007/03
AKM [ ASAHI KASEI MICROSYSTEMS ]
