參數(shù)資料
型號: AK4555VT
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: Low Power & Small Package 20bit ツヒ CODEC
中文描述: 低功耗
文件頁數(shù): 6/17頁
文件大?。?/td> 200K
代理商: AK4555VT
ASAHI KASEI
[AK4555]
MS0363-E-01
2005/08
- 6 -
FILTER CHARACTERISTICS
(Ta=25
°
C; VDD=1.6
3.6V; fs=44.1kHz; DEM1 pin = “L”, DEM0 pin = “H”)
Parameter
ADC Digital Filter (Decimation LPF):
Passband
(Note 6)
±
0.1dB
1.0dB
3.0dB
Stopband
Passband Ripple
Stopband Attenuation
Group Delay
(Note 7)
Group Delay Distortion
ADC Digital Filter (HPF):
Frequency Response
(Note 6)
3dB
0.5dB
0.1dB
DAC Digital Filter:
Passband
(Note 6)
±
0.05dB
6.0dB
Stopband
Passband Ripple
Stopband Attenuation
Group Delay
(Note 7)
DAC Digital Filter + Analog Filter:
Frequency Response
0
20.0kHz
Note 6. The passband and stopband frequencies scale with fs (sampling frequency). For examples, PB=20.0kHz(@ADC:
1.0dB, DAC:
0.1dB) are 0.454 x fs.
Note 7. This is the calculated delay time caused by digital filtering. This time is measured from the input of analog signal
to setting the 20 bit data of both channels on input register to the output register of ADC. This time also includes
group delay of HPF. For DAC, this time is from setting the 20 bit data of both channels on input register to the
output of analog signal.
DC CHARACTERISTICS
(Ta=25
°
C; VDD=1.6
3.6V)
Parameter
Symbol
High-Level Input Voltage
2.2V
VDD
3.6V
VIH
1.6V
VDD<2.2V
VIH
Low-Level Input Voltage
2.2V
VDD
3.6V
VIL
1.6V
VDD<2.2V
VIL
High-Level Output Voltage
(Iout=
20
μ
A)
VOH
Low-Level Output Voltage
(Iout= 20
μ
A)
VOL
Input Leakage Current
Iin
Symbol
min
typ
max
Units
PB
SB
PR
SA
GD
GD
0
-
-
-
17.4
-
-
-
±
0.1
-
-
-
kHz
kHz
kHz
kHz
dB
dB
1/fs
μ
s
20.0
21.1
-
-
-
17.0
0
25.7
-
65
-
-
FR
-
-
-
3.4
10
22
-
-
-
Hz
Hz
Hz
PB
SB
PR
SA
GD
0
-
-
20.0
-
-
±
0.02
-
-
kHz
kHz
kHz
dB
dB
1/fs
22.05
-
-
-
19.0
24.1
-
54
-
FR
-
±
0.5
-
dB
min
typ
-
-
-
-
-
-
-
max
-
-
Units
V
V
V
V
V
V
μ
A
70
%
VDD
80
%
VDD
-
-
VDD
0.1
-
-
30
%
VDD
20
%
VDD
-
0.1
±
10
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