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參數(shù)資料
| 型號： | AK4523 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | 20BIT STEREO ADC & DAC |
| 中文描述： | 20位立體聲ADC |
| 文件頁數(shù)： | 6/20頁 |
| 文件大小： | 161K |
| 代理商： | AK4523 |
ASAHI KASEI
[AK4523]
M0021-E-03
1999/12
- 6 -
FILTER CHARACTERISTICS
(Ta=25
°
C; VA=4.5
~
5.5V, VD=3.0
~
5.5V; DEM0=”1”, DEM1=”0”)
Parameter
ADC Digital Filter (Decimation LPF):
Passband (Note 11)
Symbol
min
typ
max
Units
-0.005dB
-0.02dB
-0.06dB
-6.0dB
PB
0
0
0
0
19.76
20.02
20.20
22.05
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
μs
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 12)
Group Delay Distortion
ADC Digital Filter (HPF):
Frequency Response (Note 5)
SB
PR
SA
GD
D
GD
24.34
±
0.005
80
29.3
0
-3dB
-0.5dB
-0.1dB
FR
0.9
2.7
6.0
Hz
Hz
Hz
DAC Digital Filter:
Passband (Note 11)
-0.06dB
-6.0dB
PB
0
0
20.0
22.05
kHz
kHz
kHz
dB
dB
1/fs
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 12)
DAC Digital Filter + Analog Filter:
Frequency Response: 0
~
20.0kHz
SB
PR
SA
GD
24.1
±
0.06
43
14.7
FR
-
±
0.2
-
dB
Note:11. The passband and stopband frequencies scale with fs.
For example, 20.02kHz at -0.02dB is 0.454 x fs. The reference frequency of these responses is 1kHz.
12. The calculating delay time which occurred by digital filtering. This time is from the input of analog signal to
setting the 20bit data of both channels to the output register for ADC.
For DAC, this time is from setting the 20bit data of both channels on input register to the output of analog
signal.
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