Page 1
PIN ASSIGNMENTS
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
GNDL
Lin
Rin
Cin
GNDR
GNDC
SLin
SRin
GNDS
SWin
AVDD
DVDD
NC
NC
SOP 28PIN
1
0
1
2
1
1
8
9
7
6
5
4
3
2
1
1
3
1
4
19
17
18
21
20
22
23
24
25
26
27
28
16
15
Rout
AVSS
Lout
SLout
Cout
SRout
SWout
AGND
DGND
LATCH
DATA
CLK
NC
NC
MAY.2003
FEATURES
* Built-in microcomputer interface circuit con-
trolled by 16-bit serial data.
* Electronic volume
Volume level......0dB~-95dB, - dB(1dB/
step)
GENERAL DESCRIPTION
The SM7347A is 6 channels electronic volume
controlled by 3-wire serial data. The IC is suitable
for use in DVD systems and AV.
APPLICATIONS
* DVD Receivers
* Home Audio equipment
* AV
C input
SW input
SL input
SR input
L input
R input
BLOCK DIAGRAM
Latch Data CLK
volume
-com
interface
C output
SW output
SL output
SR output
L output
R output
PIN DESCRIPTION
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Page 2
MAY.2003
+7V
Connect to analog GND
Pin No.
Function
Analog positive Power supply
GND
Circuit
DVDD
AVDD
GNDS
GNDR
GNDL
Symbol
1
Volume INPUT
SWin
SRin
SLin
Cin
Rin
Lin
Volume OUTPUT
SWout
SRout
SLout
Cout
Lout
Rout
-7V
Analog negative Power supply
AVSS
+5V
39,40,41
INPUT:schmitt trigger type
S
Analog GND
Digital GND
Latch INPUT
Data INPUT
Clock INPUT Fowrward data
Digital Power supply
DATA
CLK
AGND
DGND
LATCH
2
4
7
9
3
5
8
6
11
12
23
22
20
21
18
19
17
24
25
26
27
28
10
18 to 22 K
(TYP)
18~23
3,5,6,8,11,12
GNDC
Page 3
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
MAY.2003
PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM
MCU
I/F
SLout
Cout
Rout
Lout
SRout
SWout
DGND
LATCH
DATA
CLK
DVDD
SWin
SRin
SLin
Cin
Rin
Lin
volume
volume
volume
volume
volume
volume
Page 4
ABSOLUTE MAXIMUM RATINGS
AMBIENT TEMPERATURE Ta []
THERMAL DERATING (MAXIMUM RATING)
Standard board
POWER DISSIPATION pd[W]
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Parameter
Unit
Supply Voltage
V
Power dissipation
mW
Storage temperature
Symbol
Vsupply
Pd
Topr
Tstg
K
Operating temperature
Ratings
16.0
1000
10
-20~+75
-40~+125
Conditions
AVDD-AVSS
Ta<25
o
C
Ta>25
o
C
*standard board
Thermal derating
o
C
o
C
mW /
o
C
25
50
75
100
125
150
1.5
1.0
0.5
0
MAY.2003
Page 5
RECOMMENDED OPERATING CONDITION
DATA TIMING(Recommended conditions)
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Note1 : AVSS<DGND<DVDD<AVDD or AVSS<DGND<AVDD<DVDD
Note2 : AGND=(AVSS+AVDD ) / 2
Parameter
Analog positive
Supply Voltage
Analog negative
Supply Voltage
Digital
Supply Voltage
High-level Input
Voltage
Low-level Input
Voltage
Symbol
AVDD
AVSS
DVDD
VIH
VIL
Condition
Min.
6.0
- 8.0
4.5
DVDDX0.7
DGND
Typ.
7.0
- 7.0
5.0
Max.
8.0
- 6.0
5.5
DVDD
DVDDX0.3
Unit
V
V
V
V
V
H
L
H
L
H
L
DATA
CLOCK
LATCH
D0
D0
DF
D1
DE
Note: CLOCK and LATCH function at raising edges of pulse.
MAY.2003
DIGITAL BLOCK TIMING REGULATION
Page 6
CLOCK, DATA, LATCH TIMING
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
t
f
CLOCK
DATA
LATCH
tcr
75%
25%
tf
75%
25%
t
WHL
t
SD
t
HD
t
WHC
tf
tr
t
WLC
tr
t
SL
25%
75%
tr
t
SC
25%
Symbol
Unit
sec
Min
Parameter
LATCH setup time
Limits
tcr
t
WHC
t
HD
tsc
t
WHL
t
SD
tf
tr
t
WLC
t
SL
CLOCK cycle time
CLOCK pulse width("H"level)
CLOCK pulse width("L"level)
CLOCK,DATA,LATCH rise time
CLOCK,DATA,LATCH fall time
DATA setup time
DATA hold time
LATCH pulse width
CLOCK start time after LATCH
Max
Typ
8
3.2
3.2
3.2
1.6
1.6
0.8
2
3.2
0.8
MAY.2003
Page 7
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
MAY.2003
DIGITAL CONTROL SPECIFICATION
( 1 )
0
0
0
0
D01 D11 D21 D31 D41 D51 D61 D71 D81 D91 DA1 DB1 DC1 DD1
DF
DE
0
0
0
0
0
0
0
1
0
0
0
0
( 3 )
( 2 )
( 4 )
D02 D12 D22 D32 D42 D52 D62 D72 D82 D92 DA2 DB2 DC2 DD2
DF
DE
1
0
VOLUME Rch
VOLUME Lch
D03 D32 D23 D33 D43 D53 D63 D73 D83 D93 DA3 DB3 DC3 DD3
DF
DE
VOLUME SWch
VOLUME Cch
1
0
D04 D14 D24 D34 D44 D54 D64 D74 D84 D94 DA4 DB4 DC4 DD4
DF
DE
1
1
VOLUME SRch
VOLUME SLch
Note:When the IC is powered up, the internal setting of channel output are fixed to - .
Four kinds of input format options are available by changing slot settings of DE and DF.
Page 8
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
MAY.2003
(2)-1 Volume ( 0~-39dB )
Note: Do not input other data than the above.
Volume
D7X
DCX
D6X
DDX
D8X
D9X
DAX
DBX
D0X
D1X
D2X
D3X
D4X
D5X
A
T
T
0
1
4
5
2
3
6
7
10
11
8
9
24
25
28
29
26
27
30
31
34
35
32
33
12
13
16
17
14
15
18
19
22
23
20
21
36
37
38
39
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
1
1
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
0
0
1
1
0
0
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
1
1
1
1
1
1
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Page 9
MAY.2003
(2)-2 VOLUME ( 40 ~ dB )
Note: Do not input other data than the above.
Volume
D7X
DCX
D6X
DDX
D8X
D9X
DAX
DBX
D0X
D1X
D2X
D3X
D4X
D5X
A
T
T
40
41
44
45
42
43
46
47
50
51
48
49
64
65
68
69
66
67
70
71
74
75
72
73
52
53
56
57
54
55
58
59
62
63
60
61
76
77
78
79
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
1
1
1
1
1
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
0
0
1
1
0
0
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
1
1
1
1
1
1
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
1
0
1
0
0
0
0
dB
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Page 10
MAY.2003
(2)-3 VOLUME ( -80 ~ -dB )
Note: Do not input other data than the above.
Volume
D7X
DCX
D6X
DDX
D8X
D9X
DAX
DBX
D0X
D1X
D2X
D3X
D4X
D5X
A
T
T
80
83
84
81
82
85
86
89
90
87
88
91
92
95
93
94
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
0
1
0
0
0
0
0
0
0
0
1
1
0
1
1
1
1
0
1
1
1
1
0
0
1
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
0
1
0
0
1
0
1
1
1
1
0
1
0
0
1
0
0
1
0
1
1
0
1
0
1
0
0
1
1
1
0
0
1
0
1
0
0
1
0
0
0
1
1
0
0
1
0
0
1
1
0
1
1
1
1
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
1
1
1
1
Page 11
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
MAY.2003
ELECTRICAL CHARACTERISTICS
( Ta=25,AVDD=7.0V, AVSS=-7.0V, DVDD=5.0V, f=1kHz, unless otherwise noted. Rg=1K, Rl=10K,
VOLUME are set to 0dB/FLAT )
(2)InputOutput Characteristics
(1)Power Supply Characteristics
Parameter
Symbol
Test condition
Analog positive circuit
current
Analog negative circuit
current
Digital circuit current
Aldd
Alss
Dldd
Current at pin 2
No signal input
Unit
mA
mA
mA
Limits
24
24
1.0
35
35
2.0
Current at pin 17
No signal input
Current at pin 1
No signal input
typ
Max
Min
MAY.2003
Parameter
Symbol
Test condition
Unit
Limits
Min
typ
Max
Input resistance
3,5,6,8,11,12pin
K
Rin
70
150
35
Pass gain
Gv
Vi=0.2Vrms,FLAT
3,5,6,8,11,12pin INPUT
18~23pin OUTPUT
dB
0
2.0
-2.0
Maximum output
voltage
VOM
3,5,6,8,11,12pin INPUT
18~23pin OUTPUT, THD=1%
Vrms
4.2
3.0
Distortion
BW=400~30kHz
Vi=0.2Vrms,RL=10K
THD
%
0.004 0.09
Output noise
voltage
Vn(VOL)
18~23pin
JIS-A,VOL=0dB
Vrms
4
6
Signal to noise ratio
S/N
all gains=0dB; Vo=1Vrms
98
dB
105
Volume gain
between channels
Dvol
dB
0
1.5
-1.5
Maximum
attenuation
ATTmax
18~23 pin
JIS-A,VOL=-dB
dB
-100
-95
CT
Vo=0.5Vrms,RL=10K,
JIS-A, Rg=1K
Crosstalk between
channels
dB
-75
-100
Port output current
IL
RL=22K
mA
0.2
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
RECOMMENDED OPERATING CONDITIONS
Supply voltage range
Rated supply voltage
Analog
Digital
+6.0 ~ +8.0V
+7.0V
4.5 ~ 5.5V
5.0V
SIGNAL PROCESSING DIAGRAM
Note:
(1) The resistance value of Volume change about 18 to 22K by attenuated condition.
(2) No built in a zero cross circuit.
Page 12
MAY.2003
VOLUME Rch,Lch,Cch,SWch,SLch,SRch(0dB to -dB)
3.3 F
VOLUME in
3.3 F
+
_
S
CLK, DATA, LATCH
INPUT: Schmitt trigger type
1
2
8
6
10
4
7
5
9
13
3
14
12
11
28
27
21
23
19
25
22
24
20
16
26
15
17
18
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
APPLICATION EXAMPLE
Units Resistance: / Capacitance: F
Page 13
MAY.2003
volume
volume
volume
volume
volume
MCU
I/F
MCU
AVDD=7V
SWin
3.3 F
DGND
AGND
SWout
SRout
SLout
Cout
Rout
Lout
3.3 F
3.3 F
3.3 F
3.3 F
3.3 F
3.3 F
SRin
3.3 F
SLin
3.3 F
Cin
3.3 F
Rin
3.3 F
Lin
3.3 F
DVDD=5V
NC
NC
NC
NC
volume
AVSS=-7V
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Figure1 :
Crosstalk vs. R/L ch
Figure2 :
Distortion and Noise vs. Frequency
(Vin=250mV,AV=0dB,ALL CONTROLS
FLAT, VOLUME=0dB,-20dB)
MAY.2003
Page 14
SM7347A
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Page 15
MAY.2003
PACKAGE OUTLINE ( SOP28 )
C
DETAIL B
12 (4X)
PIN I INCCATOR 0.047
SURFACE POLISHED
BOTTOM E-PIN INDENT 0.069
(0.001"~0.004" OP)
E
E
1
DETAIL B
0.010
L
12 (4X)
GAGE
PLANE
SYMBOLS
MIN
NOM
MAX
DIMENSIONS IN
MILLIMETERS
DIMENSIONS IN INCHES
A
A1
A2
b
C
D
E
E1
e
L
ZD
y
1.00
0.05
0.95
0.30
0.12
18.313
11.684
10.058
0.40
0.00
0
o
1.00
0.35
18.415
11.836
10.160
0.800
0.50
0.805
1.20
0.15
1.05
0.45
0.21
18.517
11.938
10.262
0.60
0.076
8
o
0.039
0.002
0.037
0.012
0.0047
0.721
0.460
0.396
0.0157
0.000
0
o
0.039
0.014
0.725
0.466
0.400
0.315
0.020
0.0317
0.047
0.006
0.041
0.018
0.0083
0.729
0.47
0.404
0.0236
0.003
8
o
MAX
NOM
MIN
ZD
A
A1 A2
D
b
r
e
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