AK4648 Datasheet, PDF (79/119 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/SPK-AMP

[AK4648]
<Analog Mixing Circuit for Speaker Output>
1. Stereo SPK Mode (SPKMN bit = “1”)
DACS, MINS, LINS2, RINS2, LINS3, RINS3, LINS4, RINS4, MICL3, and MICR3 bits control each path switch. MIN
path mixing gain is +4.43dB(typ.) @ SPKG2-0 bits = “000” & ALC bit = “0” when AIN3 bit is “0” and the external input
resistance is 20kΩ. DACS, LINS2, RINS2, LINS3, RINS3, LINS4, and RINS4 paths mixing gain is +4.43(typ.) @
SPKG2-0 bits = “000” & ALC bit = “0”.
LIN2 pin
LIN4 pin
AIN3 bit
LIN3/MIN pin
MIN
LIN3
LINS2 bit
+4.43dB
LINS4 bit
+4.43dB
MINS bit
M
+4.43dB
I
MICL3 bit
LINS3 bit
X
+4.43dB
SPLP/N pin
LIN1 pin
MIC-Amp Lch
DAC Lch
+4.43dB
DACS bit
RIN2 pin
RIN4 pin
AIN3 bit
RIN3/VCOM pin
VCOC
RIN1 pin
RINS2 bit
+4.43dB
RINS4 bit
RIN3
+4.43dB
M
MICR3 bit
RINS3 bit
I
+4.43dB
X
MINS bit
MIC-Amp Rch
+4.43dB
DACS bit
DAC Rch
+4.43dB
SPRP/N pin
Note: When MICL3 bit is set to “1”, MIN path is not available.
Figure 58. Speaker Mixing Circuit (SPKMN bit = “1”, SPKG2-0 bits = “000”, ALC bit = “0”)
MS0625-E-01
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2007/06