參數(shù)資料
型號: AK4645
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: Stereo CODEC with MIC/HP-AMP
中文描述: 立體聲編解碼器麥克風/惠普腺苷
文件頁數(shù): 39/96頁
文件大小: 821K
代理商: AK4645
ASAHI KASEI
[AK4645]
MS0543-E-00
2006/09
- 39 -
MIC Gain Amplifier
The AK4645 has a gain amplifier for microphone input. The gain of MIC-Amp is selected by the MGAIN1-0 bits (see
Table 23). The typical input impedance is 60k
(typ)@MGAIN1-0 bits = “00” or 30k
(typ)@MGAIN1-0 bits = “01”,
“10” or “11”.
MGAIN1 bit
MGAIN0 bit
0
0
0
1
1
0
1
1
Table 23. Mic Input Gain
MIC Power
When PMMP bit = “1”, the MPWR pin supplies power for the microphone. This output voltage is typically 0.75 x AVDD
and the load resistance is minimum 0.5k
. In case of using two sets of stereo mic, the load resistance is minimum 2k
for
each channel. No capacitor must not be connected directly to MPWR pin (see Figure 34).
PMMP bit
MPWR pin
0
1
Table 24. MIC Power
MPWR pin
Input Gain
0dB
+20dB
+26dB
+32dB
Default
Default
Hi-Z
Output
MIC Power
Microphone
LIN1 pin
Microphone
RIN1 pin
Microphone
LIN2 pin
Microphone
RIN2 pin
Figure 34. MIC Block Circuit
相關(guān)PDF資料
PDF描述
AK4646EZ Stereo CODEC with MIC/SPK-AMP
AK4646 Stereo CODEC with MIC/SPK-AMP
AK4646EN Stereo CODEC with MIC/SPK-AMP
AK4647 Stereo CODEC with MIC/HP-AMP
AK4647VN Stereo CODEC with MIC/HP-AMP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4645EN 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP
AK4645ENP-L 制造商:Asahi Kasei Microsystems Co Ltd 功能描述:
AK4645EZ 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP
AK4646 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with built-in MIC/SPK amplifier
AK4646_11 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/SPK-AMP