AK4753 Datasheet, PDF (47/85 Pages) Asahi Kasei Microsystems – 2-in, 4-out CODEC with DSP Functions

[AK4753]
■ Line Outputs
Line outputs of the AK4753 have internal resisters in series. The resister value is 200Ω (typ). By just connecting small
capacitors between VSS1 and each the LOUT1/2 or ROUT1/2 pin, high frequency noise will be significantly reduced.
AK4753
200Ω (typ)
LOUT1/2
1μF
ROUT1/2
C
1 50p F
(ma x)
Figure 57. External Circuit for Stereo Line Outputs (In case of using high frequency noise reduction circuit.)
<Line Outputs Control Sequence>
The AK4753 has a mute control output pin (MUTEN pin) for external speaker amplifier. In order to prevent a pop noise
through the AK4753, the MTUEN pin is connected to a mute pin or a standby pin of the external speaker amplifier.
In the PLL mode, when the PLL is unlocked or the line outputs are disabled, the MUTEN outputs “L”. When the PLL is
locked and the line outputs are enabled, the MUTEN outputs “H”.
PMLO1/2 bit
MUTEN pin MUTE On
LOUT1/2,
ROUT1/2 pins
4ms (typ)
MUTE Off
Normal Output
MUTE On
Figure 58. Line Outputs Control Sequence
MS1311-E-00
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2011/07