
[AK4671] 
MS0666-E-00 
2007/10 
- 83 - 
■
 Stereo Line Output (LOUT1/ROUT1 pins) 
When DACL and DACR bits are “1”, Lch/Rch signal of DAC is output from the LOUT1/ROUT1 pins which is 
single-ended. When DACL and DACR bits are “0”, output signal is muted and LOUT1/ROUT1 pins output VCOM 
voltage. The load impedance is 10k
Ω
 (min.). When the PMLO1=PMRO1=LOPS1 bits = “0”, LOUT1/ROUT1 enters 
power-down mode and the output is pulled-down to VSS1 by 100k
Ω
(typ). When the LOPS1 bit is “1”, LOUT1/ROUT1 
enters power-save mode. Pop noise at power-up/down can be reduced by changing PMLO1 and PMRO1 bits at LOPS1 
bit = “1”. In this case, output signal line should be pulled-down to VSS1 by 20k
Ω
 after AC coupled as 
Figure 65
. Rise/Fall 
time is 300ms(max) at C=1
μ
F and AVDD=3.3V. When PMLO1=PMRO1 bits = “1” and LOPS1 bit = “0”, 
LOUT1/ROUT1 is in normal operation. 
L1VL3-0 bits control the volume of LOUT1/ROUT1. 
When LOM bit = “1”, DAC output signal is output to LOUT1 and ROUT1 pins as (L+R) mono signal. 
When LOOPM bit = “1”, the MIC-Amp signal is output to LOUT1 and ROUT1 pins as (L+R) mono signal. 
LOPS1 
PMLO1 
Mode 
0 
Power-down 
0 
1 
Normal Operation 
0 
Power-save 
1 
1 
Power-save 
Table 65. Stereo Line Output Mode Select (LOUT1) 
LOPS1 
PMRO1 
Mode 
0 
Power-down 
0 
1 
Normal Operation 
0 
Power-save 
1 
1 
Power-save 
Table 66. Stereo Line Output Mode Select (ROUT1) 
L1VL2-0 
Attenuation 
6H 
+6dB 
5H 
4H 
6dB 
3H 
12dB 
2H 
18dB 
1H 
24dB 
0H 
MUTE 
Table 67. Stereo Line Output Volume Setting 
LOUT1 pin 
Pull-down to VSS1 
Normal Operation 
Fall down to VSS1 
Rise up to VCOM 
(default) 
ROUT1 pin 
Pull-down to VSS1 
Normal Operation 
Fall down to VSS1 
Rise up to VCOM 
(default) 
(default)
0dB 
LOUT1
ROUT1
1
μ
F 
220
Ω
20k
Ω
Figure 65. External Circuit for Stereo Line Output (in case of using Pop Noise Reduction Circuit)