參數(shù)資料
型號(hào): AK4640
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 16BIT CODEC WITH MIC /HP/SPK-AMPl
中文描述: 16位編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植,AMPl
文件頁(yè)數(shù): 29/76頁(yè)
文件大?。?/td> 634K
代理商: AK4640
ASAHI KASEI
[AK4640]
MS0273-E-00
2004/03
- 29 -
MIC Gain Amplifier
AK4640 has a Gain Amplifier for Microphone input. This gain is 0dB or +20dB, selected by the MGAIN bit (Table 14).
The typical input impedance is 30k
.
MGAIN bit
Input Gain
0
1
+20dB
Table 14. MIC Input Gain
MIC Power
The MPI and MPE pins supply power for the Microphone. These output voltages are 0.75 x AVDD (typ) and the load
resistance is 2k
(min). No capacitor must be connected directly to MPI and MPE pins.
MPI/MPE
Default
0dB
2k
MIC Power
Microphone
INT/EXT
MIC-Amp
Figure 19. MIC Power
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