MOSA

MS6333

16-Bit Stereo Audio DAC & Headphone Driver

REV1

8

www.mosanalog.com

POWER DOWN AND MUTE FUNCTION

A microcontroller or microprocessor control power and mute function timing on MS6333 is shown in Figure 3. It

could prevent pop noise effectively when power on and power off. The signals of power down function (pin5) and mute

function (pin13) are ignored during initial time 350ms when power on. It is better to control mute function after 1sec.

The sequence is mute on and then power down when power off.

PD

POWER

350ms

1sec

>0sec

Power on:

Delay >350msec from power on to mute off.

Power off:

Delay >0sec from mute on to power off.

Fig.3

Power and mute function timing.

APPLICATION INFORMATION

Basic application example

A typical example of an MP3-application with the MS6333 is shown in Fig.4.

Power voltage of digital and analog can be used single supply voltage.

DVDD

DGND

BCK

WS

DATA

MUTE

100K

1uF

2.2uF

300K

PD

Headphone

Headphone

47uF

32Ω

47uF

32Ω

CAP

Decoder

Supply

2.7~5.5V

0.1uF

100uF

0.1uF

0.1uF

MCU

MS6333

Note :

Fig.4

MP3 Basic application circuit.