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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347
GENERAL DESCRIPTION
The SM7347 is 6 channels electronic volume controlled by 3-wire serial data. The IC is suitable for use in DVD systems and AV.
FEATURES
* 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
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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347
BLOCK DIAGRAM
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
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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347
PIN DESCRIPTION (Pin count base on 42pin SDIP)
Pin No. 1 2 3 4 5 7 10 12 13 14 15 17 6 8 9 11 16 18 36 35 34 33 32 31 29 30 37 38 39 40 41 42 Symbol OUT4 OUT3 OUT2 OUT1 AVDD GNDS GNDC GNDR1 GNDR2 GNDL1 GNDL2 GNDLR SW in SR in SL in C in R in L in SW out SR out SL out C out R out L out AVSS2 AVSS1 AGND DGND LATCH DATA CLK DVDD Analog negative Power supply Analog GND Digital GND Latch INPUT Data INPUT Clock INPUT Fowrward data Digital Power supply 39,40,41 S INPUT:schmitt trigger type +5V -7V Volume OUTPUT Volume INPUT 6,8,9,11,16,18
18 to 22 K (TYP)
Function OUTPUT: PMOS Transistor open drain
Circuit DVDD(=5V) 1 to 4
Port OUTPUT
Analog positive Power supply
+7V
GND
Connect to analog GND
31~36
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MAY.2003
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347
PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM
OUT4 OUT3 OUT2 OUT1 SWin volume OUTPUT PORT volume
DVDD CLK DATA I/F LATCH DGND
MCU
SW out SRin SLin volume SRout SLout Cout Cin volume Rout Lout volume
Rin volume LIN
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MAY.2003
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347
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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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347
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 DVDD/2+1 DGND
Typ. 7.0 - 7.0 5.0
Max. 8.0 - 6.0 5.5 DVDD DVDD/2-1
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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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347
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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6 CHANNELS VOLUME CONTROLLER
SM7347
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 1 0 0 0 0 2 3 4 0 0 0 0 0 1 0 0 DF
OUTPUT PORT 1:High 0:Low
(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 -
.
SETTING CODE
(1) Port Output Note: Do not input other data than the above. D41 Port 1 Port 2 Port 3 Port 4 0 1 0 1 0 1 0 1 L H D51 L H D61 L H D71 L H
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6 CHANNELS VOLUME CONTROLLER
SM7347
(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
SM7347
(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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6 CHANNELS VOLUME CONTROLLER
SM7347
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 5 No signal input Current at pin 29,30 No signal input Current at pin 42 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 Ri VOM Test condition 6,8,9,11,16,18pin 6,8,9,11,16,18pin INPUT 31~36pin OUTPUT, THD=1% Vi=0.2Vrms,FLAT 6,8,9,11,16,18pin INPUT 31~36pin OUTPUT BW=400~30kHz Vi=0.2Vrms,RL=10K 31~36pin JIS-A,VOL=OdB all gains=0dB; Vo=1Vrms 31~36 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
SM7347
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) + _
Note: (1) The resistance value of Volume change about 18 to 22K by attenuated condition. (2) No built in a zero cross circuit.
3.3 F
DVDD(=5V) CLK, DATA, LATCH
S OUTPUT PORT OUTPUT port: PMOS transistor open drain
INPUT: Schmitt trigger type
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MAY.2003
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7347
APPLICATION EXAMPLE
OUT4 OUT3 OUT2 OUT1
22K 22K 22K 22K
1 2 3 4 5 6
3.3F
42 OUTPUT PORT 41 MCU I/F 40 39 38 37 volume 36 35
3.3F 3.3F
DVDD=5V
MCU
AVDD=7V SWin
DGND AGND SWOUT
3.3F
7 SRin
3.3F
8 9
3.3F
SROUT
3.3F
SLin
volume
34 33
3.3F
SLOUT COUT ROUT
10 Cin
3.3F
11 volume 12 13 14 15 volume
32
3.3F
31 30 29 28 27 volume 26 25 volume 24 23 22
LOUT AVSS=-7V
Rin
3.3F
16 17
Lin
3.3F
18 19 20 21
Units Resistance: / Capacitance: F
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6 CHANNELS VOLUME CONTROLLER
Figure1 : Crosstalk vs. R/L ch
SM7347
Figure2 : Distortion and Noise vs. Frequency
(Vin=250mV,AV=0dB,ALL CONTROLS FLAT, VOLUME=0dB,-20dB)
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6 CHANNELS VOLUME CONTROLLER
SM7347
PACKAGE OUTLINE ( SDIP42 )
F 10REF eB A1 1BREF B1 70 (TYP) 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 A 5"(2X) SYMBOL PACKAGE OUTLINE DIMENSION FOR P-SDIP 42 PIN 15"(4X)
15"(2X)
E 1
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MAY.2003

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