AK4561 Datasheet, PDF (33/48 Pages) Asahi Kasei Microsystems – 16bit CODEC with built-in ALC and MIC/HP-Amp

ASAHI KASEI
AKM CONFIDENTIAL
[AK4561]
n Monaural Output
MOUT pin is provided to the output signal mixed by (L+R)/2 from analog volume (OPGA) by (L+R)/2 or the input signal
from BEEP pin. Then the mixed signal and the input signal from BEEP pin are added by 1:1.
Maximum output signal is –5.5dBV and load impedance is minimum 5kΩ. The input signal from signal is inverted.
These signals can be stopped when S11 bit is “0”. Then MOUT pin goes VCOM voltage and MOUT buffer becomes
Power-Save-Mode. (Refer to Figure 17)
When PD pin changes from “L” to “H” after power-up, MOUT pin is powered-up in normal operation. (Refer to Figure
16)
In the Power-Down-Mode ( PD pin = “L” or PM6 bit = “0”), output voltage of MOUT pin gradually change from AGND
to VCOM voltage by the time constants of an internal resistor (R1; typ.200kΩ) and an external capacitor (C1). (Refer to
Figure 18)
S11
S11
S11
-
S11
+
R1
PM6
C1
MOUT
R2
Figure 16. Normal Operation
S11
S11
S11
S11
-
+
R1
PM6
C1
MOUT
R2
Figure 17. Power-Save-Mode
S11
S11
S11
S11
-
+
R1
PM6
C1
MOUT
R2
Figure 18. Power-Down-Mode
Rev. 0.9
- 33 -
2000/09