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AK4644 参数 Datasheet PDF下载

AK4644图片预览
型号: AK4644
PDF下载: 下载PDF文件 查看货源
内容描述: 立体声编解码器与MIC / HP / RCV - AMP [Stereo CODEC with MIC/HP/RCV-AMP]
分类和应用: 解码器编解码器
文件页数/大小: 96 页 / 800 K
品牌: AKM [ ASAHI KASEI MICROSYSTEMS ]
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ASAHI KASEI  
[AK4644]  
FILTER CHARACTERISTICS  
(Ta=25°C; AVDD, DVDD=2.6 3.6V; HVDD=2.6 5.25V; fs=44.1kHz; DEM=OFF; FIL1=FIL3=EQ=OFF)  
Parameter  
Symbol  
min  
typ  
max  
Units  
ADC Digital Filter (Decimation LPF):  
Passband (Note 24)  
PB  
0
-
-
-
-
19.4  
19.9  
22.1  
-
-
-
19  
0
17.3  
-
-
-
kHz  
kHz  
kHz  
kHz  
kHz  
dB  
dB  
1/fs  
µs  
±0.16dB  
0.66dB  
1.1dB  
6.9dB  
Stopband  
Passband Ripple  
Stopband Attenuation  
Group Delay (Note 25)  
Group Delay Distortion  
SB  
PR  
SA  
GD  
GD  
26.1  
-
-
73  
-
±0.1  
-
-
-
-
ADC Digital Filter (HPF): (Note 26)  
Frequency Response (Note 24)  
FR  
-
-
-
0.9  
2.7  
6.0  
-
-
-
Hz  
Hz  
Hz  
3.0dB  
0.5dB  
0.1dB  
DAC Digital Filter (LPF):  
Passband (Note 24)  
PB  
0
-
-
19.6  
-
-
-
±0.01  
-
-
kHz  
kHz  
kHz  
kHz  
dB  
±0.1dB  
0.7dB  
6.0dB  
20.0  
22.05  
-
-
-
-
25.2  
-
59  
-
Stopband  
SB  
PR  
SA  
GD  
Passband Ripple  
Stopband Attenuation  
Group Delay (Note 25)  
dB  
1/fs  
25  
DAC Digital Filter (LPF) + SCF:  
Frequency Response: 0 20.0kHz  
DAC Digital Filter (HPF): (Note 26)  
FR  
FR  
-
-
dB  
±1.0  
Frequency Response (Note 24)  
-
-
-
0.9  
2.7  
6.0  
-
-
-
Hz  
Hz  
Hz  
3.0dB  
0.5dB  
0.1dB  
BOOST Filter: (Note 27)  
Frequency Response  
MIN  
20Hz  
100Hz  
1kHz  
20Hz  
100Hz  
1kHz  
FR  
FR  
FR  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
dB  
dB  
dB  
dB  
dB  
dB  
dB  
dB  
dB  
5.76  
2.92  
0.02  
10.80  
6.84  
0.13  
16.06  
10.54  
0.37  
MID  
MAX 20Hz  
100Hz  
1kHz  
Note 24. The passband and stopband frequencies scale with fs (system sampling rate).  
For example, DAC is PB=0.454*fs (@0.7dB). Each response refers to that of 1kHz.  
Note 25. 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 26. 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.  
Note 27. These frequency responses scale with fs. If a high-level and low frequency signal is input, the analog output clips  
to the full-scale.  
MS0477-E-01  
2006/10  
- 11 -