ak4648 AKM Semiconductor, Inc., ak4648 Datasheet - Page 75
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ak4648
Manufacturer Part Number
ak4648
Description
Stereo Codec With Mic/hp/spk-amp
Manufacturer
AKM Semiconductor, Inc.
Datasheet
1.AK4648.pdf
(119 pages)
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ak4648EC-L
Manufacturer:
AKM
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<Analog Mixing Circuit for Headphone Output>
MIN path mixing gain is − 20dB(typ.) @ HPG = 0dB when AIN3 bit is “0” and the external input resistance is 20k Ω .
DACH, LIN2, RIN2, LIN3, RIN3, LIN4, RIN4 and DAC paths mixing gain is 0dB(typ.) @ HPG =0dB.
MS0625-E-01
DACH, MINH, LINH2, RINH2, LINH3, RINH3, LINH4, RINH4, MICL3, and MICR3 bits control each path switch.
RIN3/VCOM pin
LIN3/MIN pin
LIN2 pin
LIN4 pin
LIN1 pin
RIN2 pin
RIN4 pin
RIN1 pin
AIN3 bit
AIN3 bit
VCOC
Note: When MICL3 bit is set to “1”, MIN path is not available.
Figure 56. Headphone Output Mixing Circuit (HPG = 0dB)
LIN3
MIN
RIN3
MIC-Amp Lch
MIC-Amp Rch
DAC Rch
DAC Lch
MICL3 bit
MICR3 bit
- 75 -
-20dB
-20dB
0dB
0dB
0dB
0dB
0dB
0dB
0dB
0dB
RINH2 bit
RINH4 bit
RINH3 bit
LINH2 bit
LINH4 bit
LINH3 bit
DACH bit
DACH bit
MINH bit
MINH bit
M
M
X
X
I
I
HPL pin
HPR pin
[AK4648]
2007/06
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