ak4648 AKM Semiconductor, Inc., ak4648 Datasheet - Page 79

• Manufacturer Part Number: ak4648
• Description: Stereo Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

<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 20k Ω . DACS, LINS2, RINS2, LINS3, RINS3, LINS4, and RINS4 paths mixing gain is +4.43(typ.) @
SPKG2-0 bits = “000” & ALC bit = “0”.
MS0625-E-01
RIN3/VCOM pin
LIN3/MIN pin
Figure 58. Speaker Mixing Circuit (SPKMN bit = “1”, SPKG2-0 bits = “000”, ALC bit = “0”)
LIN4 pin
LIN1 pin
RIN4 pin
RIN1 pin
LIN2 pin
RIN2 pin
AIN3 bit
AIN3 bit
VCOC
Note: When MICL3 bit is set to “1”, MIN path is not available.
LIN3
MIN
RIN3
MIC-Amp Lch
MIC-Amp Rch
DAC Rch
DAC Lch
MICL3 bit
MICR3 bit
- 79 -
+4.43dB
+4.43dB
+4.43dB
+4.43dB
+4.43dB
+4.43dB
+4.43dB
+4.43dB
+4.43dB
+4.43dB
RINS2 bit
RINS4 bit
RINS3 bit
LINS2 bit
LINS4 bit
LINS3 bit
DACS bit
DACS bit
MINS bit
MINS bit
M
M
X
X
I
I
SPLP/N pin
SPRP/N pin
[AK4648]
2007/06