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參數(shù)資料
| 型號： | AK4522 |
| 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)： | 6/18頁 |
| 文件大?。?/td> | 134K |
| 代理商： | AK4522 |
ASAHI KASEI
[AK4522]
M0020-E-01
1998/10
- 6 -
FILTER CHARACTERISTICS
(Ta=25
°
C; VA=4.5
～
5.5V, VD=2.7
～
5.5V; fs=44.1kHz; DEM0=”1”, DEM1=”0”)
Parameter
ADC Digital Filter (Decimation LPF):
Passband (Note 10)
-0.005dB
-0.02dB
-0.06dB
-6.0dB
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 11)
Group Delay Distortion
ADC Digital Filter (HPF):
Frequency Response (Note 10)
-3dB
-0.5dB
-0.1dB
DAC Digital Filter:
Passband (Note 10)
-0.06dB
-6.0dB
Stopband
Passband Ripple
Stopband Attenuation
Group Delay (Note 11)
DAC Digital Filter + Analog Filter:
Frequency Response: 0
～
20.0kHz
Symbol
min
typ
max
Units
PB
0
0
0
0
19.76
20.02
20.20
22.05
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
us
SB
PR
SA
GD
GD
24.34
±
0.005
80
29.3
0
FR
0.9
2.7
6.0
Hz
Hz
Hz
PB
0
0
20.0
22.05
kHz
kHz
kHz
dB
dB
1/fs
SB
PR
SA
GD
24.1
±
0.06
43
14.7
FR
±
0.2
dB
Note:10. 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.
11. 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.
DIGITAL CHARACTERISTICS
(Ta=25
°
C; VA=4.5
～
5.5V, VD=2.7
～
5.5V)
Parameter
High-Level Input Voltage (Except CMODE
pin)
Low-Level Input Voltage (Except CMODE
pin)
High-Level Input Voltage (CMODE pin)
Low-Level Input Voltage (CMODE pin)
Hight-Level Output Voltage (Iout=-80uA)
Low-Level Output Voltage (Iout=80uA)
Input Leakage Current (Note 12)
Symbol
VIH
VIL
min
typ
-
-
Max
-
30%VD
Units
V
V
70%VD
-
VIH
VIL
VOH
VOL
Iin
95%VD
-
VD-0.4
-
-
-
-
-
-
-
-
10%VD
-
0.4
±
10
V
V
V
V
uA
Note: 12. CMODE pin has internal pull-up and pull-down devices, nominally 50kohm.
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