參數(shù)資料
型號： AK4648EC
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： Stereo CODEC with MIC/HP/SPK-AMP
中文描述： 立體聲編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù)： 20/119頁
文件大小： 1272K
代理商： AK4648EC
[AK4648]
MS0625-E-01
2007/06
- 20 -
FILTER CHARACTERISTICS
(Ta=25
°
C; AVDD, DVDD=2.6
～
3.6V; TVDD=1.6
～
3.6V; HVDD=2.6
～
5.0V; fs=44.1kHz; DEM=OFF;
FIL1=FIL3=EQ=FBEQ=OFF)
Parameter
Symbol
ADC Digital Filter (Decimation LPF):
Passband (Note 43)
±
0.16dB
PB
0.66dB
1.1dB
6.9dB
Stopband
SB
Passband Ripple
PR
Stopband Attenuation
SA
Group Delay (Note 44)
GD
Group Delay Distortion
Δ
GD
ADC Digital Filter (HPF):
(Note 45)
Frequency Response (Note 43)
3.0dB
FR
0.5dB
0.1dB
DAC Digital Filter (LPF):
Passband (Note 43)
±
0.1dB
PB
0.7dB
6.0dB
Stopband
SB
Passband Ripple
PR
Stopband Attenuation
SA
Group Delay (Note 44)
GD
DAC Digital Filter (LPF) + SCF:
Frequency Response: 0
～
20.0kHz
FR
DAC Digital Filter (HPF):
(Note 45)
Frequency Response (Note 43)
3.0dB
FR
0.5dB
0.1dB
Note 43. The passband and stopband frequencies with fs (system sampling rate).
For example, DAC is PB=0.454*fs (@
0.7dB). Each response refers to that of 1kHz.
Note 44. The calculated delay time caused by digital filtering. This time is from the input of analog signal to setting of the
16-bit data of both channels from the input register to the output register of the ADC. This time includes the
group delay of the HPF. For the DAC, this time is from setting the 16-bit data of both channels from the input
register to the output of analog signal. Group delay of DAC part is 25/fs(typ.) at PMADL=PMADR bits = “0”.
Note 45. When PMADL bit = “1” or PMADR bit = “1”, the HPF of ADC is enabled but the HPF of DAC is disabled.
When PMADL=PMADR bits = “0”, PMDAC bit = “1”, the HPF of DAC is enabled but the HPF of ADC is
disabled.
min
typ
max
Units
0
-
-
-
-
17.3
-
-
-
-
±
0.1
-
-
-
kHz
kHz
kHz
kHz
kHz
dB
dB
1/fs
μ
s
19.4
19.9
22.1
-
-
-
19
0
26.1
-
73
-
-
-
-
-
0.9
2.7
6.0
-
-
-
Hz
Hz
Hz
0
-
-
-
19.6
-
-
-
±
0.01
-
-
kHz
kHz
kHz
kHz
dB
dB
1/fs
20.0
22.05
-
-
-
26
25.2
-
59
-
-
±
1.0
-
dB
-
-
-
0.9
2.7
6.0
-
-
-
Hz
Hz
Hz
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