參數(shù)資料
型號: AK4646EZ
廠商: ASAHI KASEI POWER DEVICES CORP
元件分類: 消費(fèi)家電
英文描述: Stereo CODEC with MIC/SPK-AMP
中文描述: SPECIALTY CONSUMER CIRCUIT, PQCC32
封裝: 4 X 4 MM, 0.40 MM PITCH, LEAD FREE, PLASTIC, QFN-32
文件頁數(shù): 31/78頁
文件大?。?/td> 808K
代理商: AK4646EZ
[AK4646EZ]
MS0630-E-00
2007/06
- 31 -
MIC Gain Amplifier
The AK4646 has a gain amplifier for microphone input. The gain of MIC-Amp is selected by the MGAIN2-0 bits (Table
19). The typical input impedance is 30k
Ω
(typ).
MGAIN2 bit
MGAIN1 bit
MGAIN0 bit
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Table 19. Mic Input Gain
MIC Power
When PMMP bit = “1”, the MPWR pin supplies power for the microphone. This output voltage is typically 0.8 x AVDD
and the load resistance is minimum 0.5k
Ω
. In case of using two sets of stereo microphone, the load resistance is minimum
2k
Ω
for each channel. Any capacitor must not be connected directly to MPWR pin (Figure 23).
PMMP bit
MPWR pin
0
1
Table 20. MIC Power
MPWR pin
Input Gain
0dB
+20dB
+26dB
+32dB
+10dB
+17dB
+23dB
+29dB
(default)
(default)
Hi-Z
Output
Ω
MIC Power
Microphone
LIN1 pin
Microphone
RIN1 pin
Microphone
LIN2 pin
Microphone
RIN2 pin
Ω
Ω
Ω
Figure 23. MIC Block Circuit
相關(guān)PDF資料
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參數(shù)描述
AK4647 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP-AMP
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