參數(shù)資料
型號(hào)： AK4641
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： 16 BIT CODEC WITH BLUETOOTH INTERFACE
中文描述： 16位編解碼器與藍(lán)牙接口
文件頁(yè)數(shù)： 15/51頁(yè)
文件大?。?/td> 461K
代理商： AK4641
ASAHI KASEI
[AK4641]
MS0301-E-00
2004/05
- 22 -
MIC Input
ADC of Stereo
CODEC
Mic In
0dB/+20dB
IPGA with ALC
Mono Mixer
P
Stereo Mixer
ATT
AUX IN
MICAD bit
AUXAD bit
MICL bit
MICM bit
ATT
DAC of
Mono CODEC
DAC2 bit = “0”: Mic Input Signal
“1”: DAC Signal
Figure 21. Microphone Input
The AK4641 has the following functions for Mic Input.
(1) 1
st MIC Amplifier of 20dB gain that can be selected ON/OFF by “MGAIN” bit.
(2) 2
nd Amplifier that has PGA with ALC. This volume is controlled by “IPGA6-0” bit as Table 7.
While ALC is working, Master Clock must be present.
When Master Clock is not provided or PMMIC bit = “0”, it is invalid to write to “IPGA6-0”.
(3) Attenuator for stereo mixer. This volume is controlled by “ATTS2-0” bit as Table 8.
(4) Attenuator for mono mixer. This attenuator level is 4dB and this ON/OFF is controlled by “ATTM” bit.
IPGA6-0
GAIN (dB)
STEP
47H
+27.5
46H
+27.0
45H
+26.5
:
36H
+19.0
:
10H
+0.0
Default
:
06H
5.0
05H
5.5
04H
6.0
03H
6.5
02H
7.0
01H
7.5
00H
8.0
0.5dB
Table 7. Microphone Input Gain Setting
ATTS2-0
Attenuation
7H
6dB
6H
9dB
5H
12dB
Default
4H
15dB
3H
18dB
2H
21dB
1H
24dB
0H
27dB
Table 8. Attenuator Table
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AK4641EN 制造商:AKM 制造商全稱:AKM 功能描述:16bit stereo CODEC with built-in Microphone-amplifier and 16bit Mono CODEC for Bluetooth Interface.
AK4641VN 制造商:AKM 制造商全稱:AKM 功能描述:16 BIT CODEC WITH BLUETOOTH INTERFACE
AK4642 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit ???￡ Stereo CODEC with MIC/HP/SPK-AMP
AK4642EN 制造商:AKM 制造商全稱:AKM 功能描述:Stereo CODEC with MIC/HP/SPK-AMP
AK4642VN 制造商:AKM 制造商全稱:AKM 功能描述:16-Bit ???￡ Stereo CODEC with MIC/HP/SPK-AMP
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