AK4648 Datasheet, PDF (75/119 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/SPK-AMP

[AK4648]
<Analog Mixing Circuit for Headphone Output>
DACH, MINH, LINH2, RINH2, LINH3, RINH3, LINH4, RINH4, MICL3, and MICR3 bits control each path switch.
MIN path mixing gain is −20dB(typ.) @ HPG = 0dB when AIN3 bit is “0” and the external input resistance is 20kΩ.
DACH, LIN2, RIN2, LIN3, RIN3, LIN4, RIN4 and DAC paths mixing gain is 0dB(typ.) @ HPG =0dB.
LIN2 pin
LIN4 pin
AIN3 bit
LIN3/MIN pin
MIN
LIN3
MICL3 bit
LINH2 bit
0dB
LINH4 bit
0dB
MINH bit
M
-20dB
I
LINH3 bit
X
0dB
HPL pin
LIN1 pin
MIC-Amp Lch
DAC Lch
DACH bit
0dB
RIN2 pin
RIN4 pin
AIN3 bit
RIN3/VCOM pin
VCOC
RIN1 pin
RINH2 bit
0dB
RINH4 bit
RIN3
0dB
M
MICR3 bit
RINH3 bit
I
0dB
X
MINH bit
MIC-Amp Rch
-20dB
DACH bit
DAC Rch
0dB
Note: When MICL3 bit is set to “1”, MIN path is not available.
Figure 56. Headphone Output Mixing Circuit (HPG = 0dB)
HPR pin
MS0625-E-01
- 75 -
2007/06