MOSA

MS6720L

Low Cost 3 Stereo Inputs / 4-Channel Outputs Audio Processor

REV 2

1/12

www.mosanalog.com

Low Cost 3 Stereo Inputs and 4-Channel Outputs

Volume, Balance, Fader and Selectable Input Gain

FEATURES

•Operation range : 2.7V ~ 6.5V

•3 stereo inputs with selectable input gain

•4 independent speaker controls for fader and balance

•Independent mute function

•Volume control in 1.25 dB/step

•I

•Components less and good PSRR

APPLICATIONS

•Portable audio device

•Car stereo audio

•Hi-Fi audio system

•Cross-reference:

MS6720

•Housed in SSOP20 packages

DESCRIPTION

The MS6720L is a 3 stereo inputs/4-channel outputs digital control audio processor for the low voltage operation.

Volume, balance (left/right), and fader (front/rear) processor are incorporated into a single chip. The MS6720L also

has selectable input gain. All functions are programmable via the serial I

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

stage are 0dB. The stereo 4 is connected internally, but not available on pins.

BLOCK DIAGRAM

RIN2

RIN1

Volume

Volume

LIN1

LIN2

LIN3

RIN3

REF

Input

Selector

&Gain

Control

ROUT

RIN

LOUT

LIN

1

5

6

4

9

10

11

7

8

12

13

Supply

AVDD AGND

2

3

Mute

OUT_LF

OUT_LR

OUT_RF

OUT_RR

17

14

15

16

SCL

SDA

DGND

18

19

20

Mute

Speaker

ATT

Mute

Speaker

ATT

Speaker

ATT

Mute

Speaker

ATT

Serial Bus Decoder and Latches