參數(shù)資料
型號: AK4650
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 & TSC
中文描述: 16位ツヒ編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 27/86頁
文件大?。?/td> 824K
代理商: AK4650
[AK4650]
MS0502-E-01
2007/04
- 27 -
MIC Gain Amplifier
The AK4650 has a Gain Amplifier for Microphone input. The gain is 0dB or +20dB, selected by the MGAIN bit. The
typical input impedance is 30k
Ω
.
MGAIN bit
Input Gain
0
0dB
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
Ω
(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 AK4650 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)
MPI pin
Hi-Z
Hi-Z
Output
(default)
MPE pin
Hi-Z
Hi-Z
Output
(default)
External microphone
Connect
Disconnect
相關(guān)PDF資料
PDF描述
AK4650VG 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
AK4651 16Bit ツヒ CODEC with MIC/HP/SPK-AMP
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AK4665A 20-Bit Stereo CODEC with MIC/HP-AMP
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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AK4664VQ 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(biāo)準(zhǔn)包裝:1,000
AK4665A 制造商:AKM 制造商全稱:AKM 功能描述:20-Bit Stereo CODEC with MIC/HP-AMP