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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347A
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.
FEATURES
* Built-in microcomputer interface circuit controlled by 16-bit serial data. * Electronic volume Volume level......0dB~-95dB, - dB(1dB/ step)
APPLICATIONS
* DVD Receivers * Home Audio equipment * AV
PIN ASSIGNMENTS
BLOCK DIAGRAM
DVDD AVDD SWin GNDS SRin SLin GNDC Cin GNDR GNDL Rin Lin NC NC
1 2 3 4 5 6 7 8 9 1 0 1 1 2 1 3 1 4
28 27 26 25 24 23 22 21 20 19 18 17 16 15
CLK DATA LATCH DGND AGND SWout SRout SLout Cout Rout Lout AVSS NC NC
C input SW input SL input SR input L input R input
volume
C output SW output SL output SR output L output R output
-com
interface
Latch Data CLK
SOP 28PIN
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MAY.2003
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347A
PIN DESCRIPTION
Pin No. 1 2 3 5 6 8 11 12 23 22 21 20 19 18 17 24 25 26 27 28 4 7 9 10 Symbol DVDD AVDD SWin SRin SLin Cin Rin Lin SWout SRout SLout Cout Rout Lout AVSS AGND DGND LATCH DATA CLK GNDS GNDC GNDR GNDL GND Connect to analog GND Analog negative Power supply Analog GND Digital GND Latch INPUT Data INPUT Clock INPUT Fowrward data 39,40,41 S INPUT:schmitt trigger type -7V Volume OUTPUT 3,5,6,8,11,12
18 to 22 K (TYP)
Function Digital Power supply Analog positive Power supply
Circuit +5V +7V
Volume INPUT
18~23
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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347A
PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM
DVDD CLK DATA I/F SRin volume LATCH DGND
SWin volume
MCU
SWout SLin volume SRout SLout Cin volume Rout Lout Rin volume Cout
Lin volume
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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347A
ABSOLUTE MAXIMUM RATINGS
Symbol Vsupply Pd K Topr Tstg Parameter Supply Voltage Power dissipation Thermal derating Operating temperature Storage temperature Conditions AVDD-AVSS Ta<25oC Ta>25oC *standard board Ratings 16.0 1000 10 -20~+75 -40~+125 Unit V mW mW / oC
oC
oC
THERMAL DERATING (MAXIMUM RATING) Standard board 1.5
POWER DISSIPATION pd[W]
1.0
0.5
0
25
50
75
100
125
150
AMBIENT TEMPERATURE Ta []
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MAY.2003
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347A
RECOMMENDED OPERATING CONDITION
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
Note1 : AVSSDATA TIMING(Recommended conditions)
DATA
H L H
D0
D1
DE
DF
D0
CLOCK
L
H LATCH L
Note: CLOCK and LATCH function at raising edges of pulse.
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6 CHANNELS VOLUME CONTROLLER
SM7347A
CLOCK, DATA, LATCH TIMING
tcr 75% 25% tr tWHC tf tWLC 75% DATA 25% tr tSD tHD tSL 25% tf tr
CLOCK
tSC
tWHL
tf
75% 25%
LATCH
DIGITAL BLOCK TIMING REGULATION
Symbol tcr tWHC tWLC tr tf tSD tHD tSL tWHL tsc 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 setup time LATCH pulse width CLOCK start time after LATCH Parameter Limits Min 8 3.2 3.2 1.6 1.6 2 3.2 3.2 Typ Max 0.8 0.8 sec Unit
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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347A
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 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 DF 0
(2)
D02 D12 D22 D32 D42 D52 D62 D72 D82 D92 DA2 DB2 DC2 DD2 DE VOLUME Lch VOLUME Rch 0
DF 1
(3)
D03 D32 D23 D33 D43 D53 D63 D73 D83 D93 DA3 DB3 DC3 DD3 DE VOLUME Cch VOLUME SWch 1
DF 0
(4)
D04 D14 D24 D34 D44 D54 D64 D74 D84 D94 DA4 DB4 DC4 DD4 DE VOLUME SLch VOLUME SRch 1
DF 1
Note:When the IC is powered up, the internal setting of channel output are fixed to -
.
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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347A
(2)-1 Volume ( 0~-39dB )
A T T D0X 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 D1X 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 D2X 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
Note: Do not input other data than the above. 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
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
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6 CHANNELS VOLUME CONTROLLER
SM7347A
(2)-2 VOLUME ( 40 ~
A T T
dB )
D0X 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 D1X D8X 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 D2X D9X 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
Note: Do not input other data than the above. D3X DAX 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 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 0 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 0 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 0
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
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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347A
(2)-3 VOLUME ( -80 ~ -dB )
A T T D0X D7X 1 1 1 D1X D8X 0 0 0 D2X D9X 1 1 1
Note: Do not input other data than the above. D3X DAX 0 0 0 D4X DBX 0 0 0 D5X DCX 0 1 1 D6X DDX 1 0 1
Volume dB dB dB

80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB dB
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
0 0 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 1 1
1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0
1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0
1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

dB dB
1 1
1 1
1 1
1 1
1 1
1 1
0 1
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MAY.2003
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347A
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 )
(1)Power Supply Characteristics
Parameter Analog positive circuit current Analog negative circuit current Digital circuit current Symbol Aldd Alss Dldd Test condition Current at pin 2 No signal input Current at pin 17 No signal input Current at pin 1 No signal input Min Limits typ 24 24 1.0 Max 35 35 2.0 Unit mA mA mA
(2)InputOutput Characteristics
Parameter Input resistance Maximum output voltage Pass gain Symbol Rin VOM Test condition 3,5,6,8,11,12pin 3,5,6,8,11,12pin INPUT 18~23pin OUTPUT, THD=1% Vi=0.2Vrms,FLAT 3,5,6,8,11,12pin INPUT 18~23pin OUTPUT BW=400~30kHz Vi=0.2Vrms,RL=10K 18~23pin JIS-A,VOL=0dB all gains=0dB; Vo=1Vrms 18~23 pin JIS-A,VOL=-dB Limits Min 35 3.0 typ 70 4.2 Max 150 Unit K Vrms
Gv THD Vn(VOL) S/N ATTmax Dvol CT
-2.0 -1.5
0
2.0
dB % Vrms dB dB dB dB
Distortion Output noise voltage Signal to noise ratio Maximum attenuation Volume gain between channels Crosstalk between channels Port output current
0.004 0.09 4 98 -100 0 -100 6 105 -95 1.5 -75
Vo=0.5Vrms,RL=10K, JIS-A, Rg=1K RL=22K
IL
0.2
mA
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MAY.2003
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347A
RECOMMENDED OPERATING CONDITIONS
Analog Supply voltage range Rated supply voltage +6.0 ~ +8.0V +7.0V
Digital 4.5 ~ 5.5V 5.0V
SIGNAL PROCESSING DIAGRAM
VOLUME in
3.3 F VOLUME Rch,Lch,Cch,SWch,SLch,SRch(0dB to -dB) + _
CLK, DATA, LATCH
S 3.3 F INPUT: Schmitt trigger type
Note: (1) The resistance value of Volume change about 18 to 22K by attenuated condition. (2) No built in a zero cross circuit.
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MAY.2003
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347A
APPLICATION EXAMPLE
DVDD=5V AVDD=7V
3.3F
1 2 3 4
3.3F volume MCU I/F
28 27 26 25 24
volume
MCU
SWin
DGND AGND
3.3F
SRin
3.3F
5 6 7
3.3F
SLin
23 22
SWout
3.3F
SRout
3.3F
Cin
8 9 10
3.3F
volume
21
3.3F
SLout Cout
3.3F
20
volume
19
3.3F
Rout Lout AVSS=-7V NC NC
Rin
3.3F
11 12 NC NC 13 14
volume
18 17
Lin
volume
16 15
Units Resistance: / Capacitance: F
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MAY.2003
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Figure1 : Crosstalk vs. R/L ch
SM7347A
Figure2 : Distortion and Noise vs. Frequency
(Vin=250mV,AV=0dB,ALL CONTROLS FLAT, VOLUME=0dB,-20dB)
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MAY.2003
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6 CHANNELS VOLUME CONTROLLER
SM7347A
PACKAGE OUTLINE ( SOP28 )
12 (4X) BOTTOM E-PIN INDENT 0.069 (0.001"~0.004" OP) PIN I INCCATOR 0.047 SURFACE POLISHED 0.010 E 1 E L DETAIL B GAGE PLANE
D A2
12 (4X)
C DETAIL B NOM 0.039 0.014 0.725 0.466 0.400 0.315 0.020 0.0317 MAX 0.047 0.006 0.041 0.018 0.0083 0.729 0.47 0.404 0.0236 o 8 0.003 A DIMENSIONS IN INCHES MIN 0.039 0.002 0.037 0.012 0.0047 0.721 0.460 0.396 0.0157 o 0 0.000
ZD
e
b
r
SYMBOLS A A1 A2 b C D E E1 e L ZD y
DIMENSIONS IN MILLIMETERS NOM MIN MAX 1.00 1.20 0.05 0.15 0.95 1.05 1.00 0.30 0.45 0.35 0.12 0.21 18.313 18.517 18.415 11.684 11.938 11.836 10.058 10.262 10.160 0.800 0.40 0.50 0.60 0.805 o o 0 8 0.00 0.076
A1
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MAY.2003

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