參數(shù)資料
型號: AK4651
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 16Bit ツヒ CODEC with MIC/HP/SPK-AMP
中文描述: 16位ツヒ編解碼器麥克風/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 25/66頁
文件大?。?/td> 605K
代理商: AK4651
ASAHI KASEI
[AK4651]
MS0503-E-00
2006/04
- 25 -
MIC Gain Amplifier
The AK4651 has a Gain Amplifier for Microphone input. The gain is 0dB or +20dB, selected by the MGAIN bit. The
typical input impedance is 30k
.
MGAIN bit
Input Gain
0
1
+20dB
Table 10. MIC Input Gain
MIC Power
The MPI and MPE pins supply power for the Microphone. These output voltages are 2.2V (typ) and load resistance is
2k
(min). MPWRI and MPWRE bits control output from MPI and MPE pins, respectively. When LNMP bit = “1”, MPE
pin becomes LIN pin.
PMMIC bit
MPWRI bit
0
x
0
1
1
Table 11. Internal Microphone Power Supply (x: Don’t care)
PMMIC bit
MPWRE bit
0
x
0
1
1
Table 12. External Microphone Power Supply (x: Don’t care)
MIC Detection Function
The AK4651 includes the detection function of microphone.
Example of the detection of external microphone.
(1) MPWRE bit = “1”.
(2) MPE drives external microphone.
(3) DTMIC bit is set by Table 13.
Input Level of MDT
DTMIC bit
> 0.247V
1
< 0.165V
0
Table 13. Microphone detection result
When RNMD bit = “1”, MDT pin becomes RIN pin.
Default
0dB
MPI pin
Hi-Z
Hi-Z
Output
Default
MPE pin
Hi-Z
Hi-Z
Output
Default
External microphone
Connect
Disconnect
相關PDF資料
PDF描述
AK4651VG 16Bit ツヒ CODEC with MIC/HP/SPK-AMP
AK4665A 20-Bit Stereo CODEC with MIC/HP-AMP
AK4665AEN 20-Bit Stereo CODEC with MIC/HP-AMP
AK4671 Stereo CODEC with MIC/RCV/HP-AMP
AK4671EG Stereo CODEC with MIC/RCV/HP-AMP
相關代理商/技術參數(shù)
參數(shù)描述
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AK4665AEN 制造商:AKM 制造商全稱:AKM 功能描述:20-Bit Stereo CODEC with MIC/HP-AMP
AK4666VQ 功能描述:IC CODEC STEREO 20BIT LQFP 制造商:akm semiconductor inc. 系列:* 零件狀態(tài):上次購買時間 標準包裝:1,000