ak4561 AKM Semiconductor, Inc., ak4561 Datasheet - Page 33

• Manufacturer Part Number: ak4561
• Description: 16bit Codec With Built-in Alc And Mic/hp-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
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 5k . 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.200k ) and an external capacitor (C1). (Refer to
Figure 18)
Rev. 0.9
S11
S11
S11
Figure 18. Power-Down-Mode
Figure 17. Power-Save-Mode
Figure 16. Normal Operation
AKM CONFIDENTIAL
-
+
-
+
-
+
S11
S11
S11
PM6
PM6
PM6
S11
S11
S11
- 33 -
S11
S11
S11
R1
R1
R1
MOUT
MOUT
MOUT
C1
C1
C1
R2
R2
R2
[AK4561]
2000/09