AK4643 Datasheet, PDF (67/104 Pages) Asahi Kasei Microsystems – Stereo CODEC with MIC/HP/RCV/SPK-AMP

ASAHI KASEI
[AK4643]
<Analog Mixing Circuit for Speaker Output>
When AIN3 bit = “0”, DACS, MINS, LINS2 and RINS2 bits controls each path switch.
MIN path mixing gain is +4.43dB(typ)@SPKG bits = “00” & ALC bit = “0” when the external input resistance is 20kΩ.
LIN2, RIN2 and DAC pathes mixing gain is −1.59dB(typ)@SPKG bits = “00” & ALC bit = “0”.
LINS2 bit
LIN2 pin
−1.59dB
RIN2 pin
MIN pin
−1.59dB
RINS2 bit
MINS bit
M
+4.43dB
I
SPP/N pin
DAC Lch
DACS bit X
−1.59dB
DAC Rch
−1.59dB
DACS bit
Figure 63. Speaker Mixing Circuit (AIN3 bit = “0”, SPKG1-0 bits = “00”, ALC bit = “0”)
When AIN3 bit = “1”, DACS, LINS2, RINS2, LINS3, RINS3, MICL3 and MICR3 bits controls each path switch. All
pathes mixing gain is 0dB(typ)@HPG bit = “0”.
LINS2 bit
LIN2 pin
−1.59dB
LIN3 pin
MICL3 bit
−1.59dB
LINS3 bit
LIN1 pin
*These blocks are not
MIC-Amp Lch available at PLL mode.
RIN2 pin
RIN3 pin
−1.59dB
RINS2 bit
M
MICR3 bit
RINS3 bit
I
−1.59dB
X
SPP/N pin
RIN1 pin
MIC-Amp Rch
DAC Lch
*These blocks are not
available at PLL mode.
DACS bit
−1.59dB
DAC Rch
−1.59dB
DACS bit
Figure 64. Speaker Mixing Circuit (AIN3 bit = “1”, SPKG bits = “00”, ALC bit = “0”)
MS0476-E-01
- 67 -
2006/10