MOSA

MS6712

4 Stereo Inputs / 4-Channel Outputs Audio Processor

REV1.0

1

www.mosanalog.com

4 Stereo Inputs and 4-Channel Outputs

Volume, Tone, Balance, Fader, Loudness,

and Selectable Input Gain

FEATURES

•Operation range : 2.7V~5V

•4 stereo inputs with selectable input gain

•4 independent speaker controls for fader and balance

•Tone controls (treble and bass) and loudness function

•Independent mute function

•Volume control in 1.25 dB/step

•I

•Components less and good PSRR

•Housed in SOP32 packages

APPLICATIONS

•Portable audio device

•Car stereo audio

•Hi-Fi audio system

•Cross-reference:

PT2312

DESCRIPTION

The MS6712 is a 4 stereo inputs/4-channel outputs digital control audio processor for the low voltage operation.

Volume, tone (bass and treble), balance (left/right), and fader (front/rear) processor are incorporated into a single chip.

The MS6712 also has the loudness function and selectable input gain. These functions can be built a Hi-Fi audio

system easily. All functions are programmable via the serial I

are: the volume is -78.75dB, the stereo 4 is selected, all the speakers are mute and the gains of the input stage, the bass

and the treble are 0dB.

BLOCK DIAGRAM

RIN2

RIN1

Treble

Bass

Volume &

Londness

Volume &

Londness

Bass

Treble

LIN1

LIN2

LIN3

RIN3

REF

R

B

R

B

Input

Selector

&Gain

Control

LOUD_R

ROUT

RIN

TREB_R

BOUT_R BIN_R

LOUD_L

LOUT

LIN

TREB_L

BOUT_L BIN_L

1

8

9

11

5

6

7

17

18

19

12

13

15

23

24

25

20

21

22

Mute

OUT_LF

OUT_LR

OUT_RF

OUT_RR

29

26

27

28

SCL

SDA

DGND

30

31

32

Supply

AVDD AGND

2

3

Serial Bus Decoder and Latches

Mute

Speaker

ATT

Mute

Speaker

ATT

Speaker

ATT

Mute

Speaker

ATT

LIN4

16

RIN4

10