MOSA
MS6712
4 Stereo Inputs / 4-Channel Outputs Audio Processor
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
2
C interface
•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
2
C bus. The default states of the chip as the 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, the bass
and the treble are 0dB.
BLOCK DIAGRAM
LOUT
21
LIN LOUD_L BOUT_L BIN_L
20
15
23
22
TREB_L
5
Speaker
ATT
29
OUT_LF
R
B
Mute
Speaker
ATT
LIN1
LIN2
LIN3
LIN4
19
18
17
16
Volume &
Londness
Input
Selector
&Gain
Control
Volume &
Londness
Bass
Treble
27
Mute
OUT_LR
32
Serial Bus Decoder and Latches
RIN4
RIN3
RIN2
RIN1
10
11
12
13
SCL
31
SDA
30
DGND
Speaker
ATT
Bass
Treble
28
OUT_RF
Mute
R
B
Speaker
ATT
Supply
2
3
1
8
7
9
25
26
OUT_RR
24
6
TREB_R
Mute
AVDD AGND REF ROUT
RIN LOUD_R BOUT_R BIN_R
REV1.0
1
www.mosanalog.com
MOSA [ MOSA ELECTRONICS ]
