SAMHOP Microelectronics Corp.
SM7347
6 CHANNELS VOLUME CONTROLLER
GENERAL DESCRIPTION
FEATURES
The SM7347 is 6 channels electronic volume
controlled by 3-wire serial data. The IC is suitable
for use in DVD systems and AV.
* 4 Output ports
* Built-in microcomputer interface circuit controlled by 16-bit serial data.
* Electronic volume
Volume level......0dB~-79dB, - ∞dB(1dB/
step)
APPLICATIONS
* DVD
* Home Audio equipment
* AV
PIN ASSIGNMENTS
OUT4
OUT3
OUT2
OUT1
AVDD
SWin
GNDS
SRin
SLin
GNDC
Cin
GNDR1
GNDR2
GNDL1
GNDL2
Rin
GNDLR
Lin
NC
NC
NC
1
2
3
4
5
6
7
8
9
1
0
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
DVDD
CLK
DATA
LATCH
DGND
AGND
SWout
SRout
SLout
Cout
Rout
Lout
AVSS1
AVSS2
NC
NC
NC
NC
NC
NC
NC
SDIP 42PIN
Page 1
MAY.2003
SAMHOP Microelectronics Corp.
SM7347
6 CHANNELS VOLUME CONTROLLER
BLOCK DIAGRAM
C output
C input
SW input
volume
SW output
SL input
SL output
SR input
SR output
L output
L input
R output
R input
μ-com
interface
Latch Data CLK
Page 2
MAY.2003
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
PIN DESCRIPTION (Pin count base on 42pin SDIP)
Symbol
Pin No.
1
OUT4
2
OUT3
3
OUT2
4
OUT1
5
AVDD
7
GNDS
10
GNDC
12
GNDR1
13
GNDR2
14
GNDL1
15
GNDL2
17
GNDLR
6
SW in
8
SR in
9
SL in
11
C in
16
R in
18
36
L in
SW out
35
SR out
Circuit
Function
Port OUTPUT
DVDD(=5V)
OUTPUT: PMOS
Transistor
open drain
1 to 4
Analog positive Power supply
+7V
GND
Connect to analog GND
Volume INPUT
6,8,9,11,16,18
18 to 22 KΩ
(TYP)
34
SL out
33
C out
32
R out
31
L out
29
AVSS2
30
AVSS1
37
AGND
38
DGND
Digital GND
39
LATCH
Latch INPUT
40
DATA
Data INPUT
41
CLK
42
DVDD
31~36
Volume OUTPUT
Analog negative Power supply
-7V
Analog GND
Clock INPUT Fowrward data
Digital Power supply
Page 3
39,40,41
S
INPUT:schmitt trigger type
+5V
MAY.2003
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM
OUT4
OUT3
OUT2
OUT1
DVDD
OUTPUT
PORT
MCU
volume
SWin
CLK
DATA
I/F
LATCH
DGND
volume
SW out
SRin
volume
SLin
SRout
SLout
Cout
Cin
volume
Rout
Lout
volume
Rin
volume
LIN
Page 4
MAY.2003
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Conditions
Ratings
Unit
Vsupply
Supply Voltage
AVDD-AVSS
16.0
V
Pd
Power dissipation
Ta<25oC
1000
mW
Kθ
Thermal derating
Ta>25oC
*standard board
10
mW / oC
Topr
Operating temperature
-20~+75
oC
Tstg
Storage temperature
-40~+125
oC
THERMAL DERATING (MAXIMUM RATING)
Standard board
POWER DISSIPATION pd[W]
1.5
1.0
0.5
0
25
50
75
100
125
150
AMBIENT TEMPERATURE Ta [℃]
Page 5
MAY.2003
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
RECOMMENDED OPERATING CONDITION
Parameter
Symbol
Condition
Min.
Typ.
Max.
Unit
Analog positive
Supply Voltage
AVDD
6.0
7.0
8.0
V
Analog negative
Supply Voltage
AVSS
- 8.0
- 7.0
- 6.0
V
Digital
Supply Voltage
DVDD
4.5
5.0
5.5
V
High-level Input
Voltage
VIH
DVDD/2+1
－
DVDD
V
Low-level Input
Voltage
VIL
DGND
－
DVDD/2-1
V
Note1 : AVSS<DGND<DVDD<AVDD or AVSS<DGND<AVDD<DVDD
Note2 : AGND=(AVSS+AVDD ) / 2
DATA TIMING(Recommended conditions)
DATA
H
D0
D1
DE
DF
D0
L
H
CLOCK
L
H
LATCH
L
Note: CLOCK and LATCH function at raising edges of pulse.
Page 6
MAY.2003
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
CLOCK, DATA, LATCH TIMING
tcr
75%
CLOCK
25%
tr
tf
tWLC
tWHC
75%
25%
DATA
tSC
tf
tr
tSD
tHD
tWHL
tSL
LATCH
tf
tr
75%
25%
25%
DIGITAL BLOCK TIMING REGULATION
Symbol
Limits
Parameter
Min
Typ
Max
tcr
CLOCK cycle time
8
―
―
tWHC
CLOCK pulse width("H"level)
3.2
―
―
tWLC
CLOCK pulse width("L"level)
3.2
―
―
tr
CLOCK,DATA,LATCH rise time
―
―
0.8
tf
CLOCK,DATA,LATCH fall time
―
―
0.8
tSD
DATA setup time
1.6
―
―
tHD
DATA hold time
1.6
―
―
tSL
LATCH setup time
2
―
―
tWHL
LATCH pulse width
3.2
―
―
tsc
CLOCK start time after LATCH
3.2
―
―
Unit
μ sec
Page 7
MAY.2003
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
DIGITAL CONTROL SPECIFICATION
Four kinds of input format options are available by changing slot settings of DE and DF.
(1)
D01 D11 D21 D31 D41 D51 D61 D71 D81 D91 DA1 DB1 DC1 DD1 DE
2
1
0
(2)
0
0
0
3
4
OUTPUT PORT
1:High 0:Low
0
0
0
0
1
0
0
VOLUME Rch
D03 D32 D23 D33 D43 D53 D63 D73 D83 D93 DA3 DB3 DC3 DD3 DE
VOLUME Cch
(4)
0
D02 D12 D22 D32 D42 D52 D62 D72 D82 D92 DA2 DB2 DC2 DD2 DE
VOLUME Lch
(3)
DF
VOLUME SWch
1
D04 D14 D24 D34 D44 D54 D64 D74 D84 D94 DA4 DB4 DC4 DD4 DE
VOLUME SLch
VOLUME SRch
1
Note:When the IC is powered up, the internal setting of channel output are fixed to -
0
DF
1
DF
0
DF
1
.
SETTING CODE
(1) Port Output
Note: Do not input other data than the above.
D41
Port 1
Port 2
Port 3
Port 4
0
L
1
H
0
1
0
1
0
1
－
D51
D61
D71
－
－
－
－
－
L
H
－
－
－
－
Page 8
L
H
－
－
L
H
MAY.2003
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
(2)-1 Volume ( 0~-39dB )
A
T
T
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
Volume
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
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
Note: Do not input other data than the above.
D0X
D1X
D2X
D7X
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
D8X
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
1
1
1
1
D9X
0
0
0
0
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
Page 9
D3X
DAX
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
D4X
DBX
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
D5X
DCX
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D6X
DDX
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
MAY.2003
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
(2)-2 VOLUME ( －40 ~－
A
T
T
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
Volume
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
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
dB
dB )
Note: Do not input other data than the above.
D0X
D1X
D2X
D3X
D4X
D7X
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
1
1
1
1
1
1
1
1
1
1
1
1
1
D8X
D9X
DAX
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
0
0
0
0
0
0
0
0
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
0
0
0
0
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
Page 10
D6X
DBX
D5X
DCX
DDX
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
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
MAY.2003
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
ELECTRICAL CHARACTERISTICS
( Ta=25℃,AVDD=7.0V, AVSS=-7.0V, DVDD=5.0V, f=1kHz, unless otherwise noted. Rg=1KΩ, Rl=10KΩ,
VOLUME are set to 0dB/FLAT )
(1)Power Supply Characteristics
Parameter
Symbol
Analog positive circuit
current
Analog negative circuit
current
Aldd
Alss
Dldd
Digital circuit current
Test condition
Current at pin 5
No signal input
Current at pin 29,30
No signal input
Current at pin 42
No signal input
Limits
typ
Max
－
－
24
35
mA
24
35
mA
－
1.0
2.0
mA
Min
Unit
(2)Input／Output Characteristics
Limits
Parameter
Symbol
Test condition
Input resistance
Ri
6,8,9,11,16,18pin
Maximum output
voltage
VOM
6,8,9,11,16,18pin INPUT
31~36pin OUTPUT, THD=1%
Pass gain
Gv
Vi=0.2Vrms,FLAT
6,8,9,11,16,18pin INPUT
31~36pin OUTPUT
-2.0
Distortion
THD
BW=400~30kHz
Vi=0.2Vrms,RL=10KΩ
－
Output noise
voltage
Vn(VOL)
31~36pin
JIS-A,VOL=OdB
－
4
6
μVrms
Signal to noise ratio
S/N
all gains=0dB; Vo=1Vrms
－
98
105
dB
Maximum
attenuation
ATTmax
31~36 pin
JIS-A,VOL=-∞dB
－
-100
-95
dB
Volume gain
between channels
Dvol
-1.5
0
1.5
dB
Crosstalk between
channels
CT
Vo=0.5Vrms,RL=10KΩ,
JIS-A, Rg=1KΩ
－
-100
-75
dB
Port output current
IL
RL=22KΩ
0.2
－
－
mA
Page 11
Unit
Min
typ
Max
35
70
150
KΩ
3.0
4.2
－
Vrms
0
2.0
dB
0.004 0.09
%
MAY.2003
SAMHOP Microelectronics Corp.
SM7347
6 CHANNELS VOLUME CONTROLLER
RECOMMENDED OPERATING CONDITIONS
Analog
Digital
Supply voltage range
+6.0 ~ +8.0V
4.5 ~ 5.5V
Rated supply voltage
+7.0V
5.0V
SIGNAL PROCESSING DIAGRAM
VOLUME in
3.3 μF
VOLUME Rch,Lch,Cch,SWch,SLch,SRch (0dB to -∞dB)
+
_
3.3 μF
Note:
(1) The resistance value of Volume change about 18 to 22KΩ by attenuated condition.
(2) No built in a zero cross circuit.
DVDD(=5V)
CLK, DATA, LATCH
S
OUTPUT PORT
OUTPUT port:
PMOS transistor open drain
INPUT: Schmitt trigger type
Page 12
MAY.2003
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
APPLICATION EXAMPLE
OUT4
OUT3
OUT2
22KΩ
2
3
22KΩ
41
OUTPUT
PORT
MCU
I/F
4
OUT1
DVDD=5V
42
1
22KΩ
40
MCU
39
22K Ω
38
5
AVDD=7V
SWin
37
6
volume
3.3μF
DGND
36
7
AGND
3.3μF
SWOUT
3.3μF
SRin
35
8
SLin
SROUT
3.3μF
3.3μF
9
volume
34
3.3μF
3.3μF
33
10
SLOUT
COUT
3.3μF
32
11
Cin
12
31
13
30
14
volume
16
3.3μF
Lin
LOUT
AVSS=-7V
29
28
15
Rin
ROUT
3.3μF
volume
3.3μF
27
volume
17
26
18
25
3.3μF
19
volume
24
20
23
21
22
Units Resistance:Ω / Capacitance: F
Page 13
MAY.2003
SAMHOP Microelectronics Corp.
SM7347
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)
Page 14
MAY.2003
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
PACKAGE OUTLINE ( SDIP42 )
F
E
1
10REF
15"(4X)
eB
A1
A
15"(2X)
5"(2X)
1BREF
B1
70 (TYP)
SYMBOL
A
A1
B1
D
E1
F
eB
MIN
155
70
36
1448
549
592
600
o
0
Dimonation in mil
MAX
NOM
160
165
72.5
74
40
44
1450
1452
550
551
800
608
650
700
o
o
7.5
15
Dimenation in mm
MIN
NOM
MAX
3.937
4.064
4.2
1.78
1.842
1.88
0.914
1.270
1.118
36.78
36.83
36.88
13.945
13.970
13.998
15.037
15.240
15.443
15.24
16.510
17.78
o
o
o
0
7.5
15
PACKAGE OUTLINE DIMENSION FOR P-SDIP 42 PIN
Page 15
MAY.2003