參數(shù)資料
型號： AK4673EG
廠商： Asahi Kasei Microsystems Co.,Ltd
元件分類： Codec
英文描述： Stereo CODEC with MIC/HP-AMP and Touch Screen Controller
中文描述： 立體聲編解碼器麥克風/惠普- AMP及觸摸屏控制器
文件頁數(shù)： 55/107頁
文件大?。?/td> 1171K
代理商： AK4673EG
[AK4673]
MS0670-E-00
2007/09
- 55 -
■
Analog Mixing: Stereo Input (LIN2/RIN2/LIN4/RIN4, AIN3 bit = “1”: LIN3/RIN3 pins)
When PMAINL2=PMAINR2 bits = “1”, LIN2 and RIN2 pins can be used as stereo line input for analog mixing. When
the LINH2 and RINH2 bits are set to “1”, the input signal from the LIN2/RIN2 pins is output to Headphone-Amp. When
the LINL2/RINR2 bits are set to “1”, the input signal from the LIN2/RIN2 pins is output to the stereo line output
amplifier.
When PMAINL4=PMAINR4 bits = “1”, LIN4 and RIN4 pins can be used as stereo line input for analog mixing. When
the LINH4 and RINH4 bits are set to “1”, the input signal from the LIN4/RIN4 pins is output to Headphone-Amp. When
the LINL4/RINR4 bits are set to “1”, the input signal from the LIN4/RIN4 pins is output to the stereo line output
amplifier.
When the analog mixing is used, A/D converter is also available if PMADL or PMADR bit is “1”. In this case, the input
resistance of LIN2/RIN2/LIN4/RIN4 pins become 30k
Ω
(typ) at MGAIN1-0 bits = “00” and 20k
Ω
(typ) at MGAIN1-0
bits = “01”, “10” or “11”, respectively.
When AIN3 bit = “1”, the MIN and VCOC pins become LIN3 and RIN3 pins, respectively. In this case, PLL is not
available. When PMAINL3=PMAINR3 bits = “1”, LIN3 and RIN3 pins can be used as stereo line input for analog
mixing. When PMMICL=PMMICR=MICL3=MICR3 bits = “1”, analog mixing source is changed from LIN3/RIN3
input to MIC-Amp output signal. When the LINH3 and RINH3 bits are set to “1”, the input signal from the LIN3/RIN3
pins is output to Headphone-Amp. When the LINL3/RINR3 bits are set to “1”, the input signal from the LIN3/RIN3 pins
is output to the stereo line output amplifier.
When the analog mixing is used, A/D converter is also available if PMADL or PMADR bit is “1”. When the analog
mixing is used at MICL3=MICR3 bits = “0”, the input resistance of LIN3/RIN3 pins becomes 30k
Ω
(typ) at MGAIN1-0
bits = “00” and 20k
Ω
(typ) at MGAIN1-0 bits = “01”, “10” or “11”, respectively. When the analog mixing is used at
MICL3=MICR3 bits = “1”, the input resistance of LIN3/RIN3 pins becomes 60k
Ω
(typ) at MGAIN1-0 bits = “00” and
30k
Ω
(typ) at MGAIN1-0 bits = “01”, “10” or “11”, respectively.
Table 41
,
Table 42
and
Table 43
show the typical gain.
AK4673
LIN1/IN1
pin
ADC Lch
RIN1/IN1+ pin
INL1-0 bits
MDIF1 bit
RIN2/IN2
pin
ADC Rch
LIN2/IN2+ pin
INR1-0 bits
MDIF2 bit
MIN/LIN3 pin
VCOC/RIN3 pin
Lineout, HP-Amp
MIC-Amp
MIC-Amp
M
M
P
P
P
P
P
P
LIN4/IN4+ pin
RIN4/IN4
pin
These blocks are not
available at PLL mode.
Figure 39. Analog Mixing Circuit (Stereo Input)
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