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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7346
GENERAL DESCRIPTION
The SM7346 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) * Tone control Bass/Treble, 0dB~+10dB(2dB/step)
APPLICATIONS
* DVD * Home Audio Equipment * AV
PIN ASSIGNMENTS
OUT4 OUT3 OUT2 OUT1 AVDD SWin GNDS SRin SLin GNDC Cin GNDR Rin GNDL Lin BYPASSR BYPASSL LTRE LBASS3 LBASS2 LBASS1
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 AVSS CL1 CL2 CR1 CR2 RTRE RBASS3 RBASS2 RBASS1
OUT4 OUT3 OUT2 OUT1 AVDD SWin GNDS SRin SLin GNDC Cin GNDR Rin GNDL Lin BYPASSR BYPASSL LTRE LBASS3 LBASS2 LBASS1 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 2 2
44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23
DVDD CLK DATA LATCH DGND AGND SWout SRout SLout Cout Rout Lout AVSS CL1 CL2 CR1 CR2 RTRE RBASS3 RBASS2 RBASS1 NC
SDIP 42PIN TSSOP 44PIN
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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7346
BLOCK DIAGRAM
C input SW input SL input SR input BypassL BypassR
volume C output SW output SL output SR output
tone L input R input
volume
L output R output
-com
interface
Latch Data CLK
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6 CHANNELS VOLUME CONTROLLER
PIN DESCRIPTION (Pin count base on 42pin SDIP)
Pin No. 1 2 3 4 5 7 10 12 14 6 8 9 11 36 35 34 33 13 15 16 17 31 32 18 25 19 24 20 23 21 22 26 28 27 29 31 32 30 37 38 39 40 41 42 Symbol OUT4 OUT3 OUT2 OUT1 AVDD GNDS GNDC GNDR GNDL SW in SR in SL in C in SW out SR out SL out C out R in L in BYPASSR BYPASSL L out R out LTRE tone Treble cycle control RTRE LBASS3 RBASS3 LBASS2 RBASS2 LBASS1 RBASS1 CR2 CL2 CR1 CL1 L out R out AVSS AGND DGND LATCH DATA CLK DVDD L.R Volume INPUT L OUTPUT R OUTPUT Analog negative Power supply Analog GND Digital GND Latch INPUT Data INPUT Clock INPUT Forward data Digital Power supply 27,29
70 K (TYP) 18 to 22 K (TYP)
SM7346
Function Port OUTPUT Analog positive Power supply GND OUTPUT: PMOS Transistor open drain
Circuit DVDD(=5V) 1 to 4 +7V
Connect to analog GND
Volume INPUT
6,8,9,11
18 to 22 K (TYP)
33,34,35,36
Volume OUTPUT
Tone INPUT L.R Volume INPUT in BYPASS mode L OUTPUT R OUTPUT 16,17
13,15
70 K (TYP)
70 K (TYP)
31,32
18 to 22 K (TYP)
18,25
tone Bass cycle control 19,24
2.3 K (TYP)
20,23
21,22
Tone OUTPUT
26,28
31,32
-7V
39,40,41
S
INPUT:schmitt trigger type +5V
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6 CHANNELS VOLUME CONTROLLER
SM7346
PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM ( Pin count base on 42pin )
OUT4 OUT3 OUT2 OUT1 SWin
1 2 3 4 6 volume OUTPUT PORT MCU volume I/F
42
DVDD
41 40 39 38
CLK DATA LATCH DGND
36 8 volume 9 34 33 Cin 11 volume 32 31 13 volume 30 29 28 27 26 35
SW out SRout SLout Cout Rout Lout AVSS CL1 CL2 CR1 CR2
SRin SLin
Rin
Lin BYPASSR BYPASSL
15 16 17
volume
AVDD
5 tone tone
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6 CHANNELS VOLUME CONTROLLER
SM7346
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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6 CHANNELS VOLUME CONTROLLER
SM7346
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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6 CHANNELS VOLUME CONTROLLER
SM7346
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
SM7346
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 TONE CONTROL TREBLE (2) 1 2 3 4 TONE CONTROL BASS 0
BY PASS 1:ON 0:OFF
DF 0
OUTPUT PORT 1:High 0:Low
0
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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6 CHANNELS VOLUME CONTROLLER
SETTING CODE (1) Tone Control (bass / treble)
ATT treble bass -10dB -8dB -6dB -4dB -2dB +0dB +2dB +4dB +6dB +8dB +10dB D01 D81 1 1 1 1 1 0 0 0 0 0 0 D11 D91 1 1 0 0 0 0 0 0 0 1 1 D21 DA1 1 0 1 1 0 0 0 1 1 0 1 D31 DB1 0 0 1 0 1 0 1 0 1 0 0
SM7346
Port output
D41 PORT1 PORT2 PORT3 PORT4 0 1 0 1 0 1 0 1 L H D51 L H D61 L H D71 L H
BYPASS control
DD1 TONE BYPASS 0
1
Note: Do not input other data than the above.
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6 CHANNELS VOLUME CONTROLLER
SM7346
(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
SM7346
(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
SM7346
ELECTRICAL CHARACTERISTICS
( Ta=25,AVDD=7.0V, AVSS=-7.0V, DVDD=5.0V, f=1kHz, unless otherwise noted. Rg=1K, Rl=10K, TONE CONTROL, VOLUME are set to 0dB/FLAT )
(1)Power Supply Characteristics ( Pin count base on 42pin version )
Parameter Analog positive circuit current Analog negative circuit current Digital circuit current Symbol Aldd Alss Dldd Test condition Current at pin 5 No signal Current at pin 30 No signal Current at pin 42 No signal Min Limits typ 24 24 1.0 Max 35 35 2.0 Unit mA mA mA
(2)InputOutput Characteristics ( Pin count base on 42pin version )
Parameter Input resistance Maximum output voltage Pass gain Symbol Ri VOM Test condition 13,15,16,17,27,29pin 6,8,9,11,13,15,16,17pin INPUT 31~36pin OUTPUT, THD=1% Vi=0.2Vrms,FLAT 6,8,9,11,13,15,16,17pin INPUT 31~36pin OUTPUT BW=400~30kHz Vi=0.2Vrms,RL=10K 31~36pin JIS-A,VOL=OdB 31,32pin JIS-A,VOL=0dB 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) Vn(tone) S/N ATTmax Dvol CT
-2.0 -1.5
0
2.0
dB % Vrms Vrms dB dB dB dB
Distortion
0.004 0.09 4 8 98 -92 0 -100 6 20 105 -86 1.5 -80
Output noise voltage
Signal to noise ratio Maximum attenuation Volume gain between channels Crosstalk between channels Port output current
Vo=0.5Vrms,RL=10K, JIS-A, Rg=1K RL=22K
IL
0.2
mA
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6 CHANNELS VOLUME CONTROLLER
SM7346
(3) Tone Control Characteristics ( Pin count base on 42pin version )
Parameter
Symbol T -10dB T -8dB T -6dB
Test condition
Min -12 -10 -7.5
Limits typ -10 -8 -6 -4 -2 2 4 6 8 10
Max -8 -6 -4.5 -2.5 -1 3 5.5 7.5 10 12
Unit dB dB dB dB dB dB dB dB dB dB
Tone control voltage gain
T -4dB T -2dB T +2dB T +4dB T +6dB T +8dB T +10dB
Vo=0.2Vrms,f=1kHz TREBLE(f=10kHz) BASS(f=100Hz) INPUT 13,15pin OUTPUT 31,32pin
-5.5 -3 1 2.5 4.5 6 8
Balance between channel
BALT
Input pin13,15 Vo=0.2Vrms Output pin31,32,
+1.5
0
+1.5
dB
RECOMMENDED OPERATING CONDITIONS
Analog Supply voltage range Rated supply voltage +6.0 ~ +8.0V +7.0V
Digital 4.5 ~ 5.5V 5.0V
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6 CHANNELS VOLUME CONTROLLER
SM7346
SIGNAL PROCESSING DIAGRAM
BYPASS 3.3 F 70K TONE CONTROL (+10dB to -10dB) TONE in 3.3 F 70K + _ BASS + _ TREBLE + _ 3.3 F 70K + _
VOLUME Lch, Rch (0dB to -dB)
3.3 F 8200pF 0.015 F VOLUME in 3.3 F VOLUME Cch,SWch,SLch,SRch(0dB to -dB) + _ 0.33 F
Note: (1) The resistance value of Volume change about 18 to 22K by attenuated condition. (2) No built in a zero cross circuit. (3) When the mode changed (BYPASS/TONE), it is necessary the muting function. DVDD(=5V) CLK, DATA, LATCH
3.3 F
S OUTPUT PORT OUTPUT port: PMOS transistor open drain
INPUT: Schmitt trigger type
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6 CHANNELS VOLUME CONTROLLER
APPLICATION EXAMPLE ( Pin count base on 44pin )
SM7346
OUT4
22K
1
22K 22K 22K
44 OUTPUT PORT 43 volume MCU I/F 42 41 volume 40 39 38 volume 37 36 volume 35 34 33 volume 32 31
3.3F 3.3F 3.3F 3.3F 3.3F 3.3F 3.3F
DVDD=5V
OUT3 OUT2 OUT1 AVDD=7V SWin
2 3 4 5
MCU
DGND AGND SWout SRout SLout Cout Rout Lout AVSS= -7V
3.3F
6 7
SRin SLin
3.3F 3.3F
8 9 10
Cin
3.3F
11 12
Rin
3.3F
13 14
Lin BYPASSR BYPASSL
3.3F 3.3F 3.3F
15 volume 16 17 18
30 29
3.3F
28 27 26 tone tone 25 24 23 NC 8200pF
0.015 F 0.33 F
8200pF
19
0.015F
20
0.33 F
21 NC 22
Units Resistance: / Capacitance: F
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6 CHANNELS VOLUME CONTROLLER
Figure1 : Tone Response of Treble
SM7346
Figure2 : Tone Response of Bass
Figure3 : Crosstalk vs. R/L ch
Figure4 : Distortion and Noise vs. Frequency
(Vin=250mV,AV=0dB,ALL CONTROLS FLAT, VOLUME=0dB,-20dB)
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6 CHANNELS VOLUME CONTROLLER
SM7346
PACKAGE OUTLINE ( TSSOP44)
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
12 (4X)
A2 C DETAIL B 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 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
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 1.00 1.05 0.30 0.35 0.45 0.12 0.21 18.313 18.415 18.517 11.684 11.836 11.938 10.058 10.160 10.262 0.800 0.40 0.60 0.50 0.805 o o 0 8 0.00 0.076
NOTE: 1. CONTROLLING DIMENSION 1 INCH. 2. LEAD FRAME MATERIAL ALLOY 42. 3. DIMENSION "D" DOES NOT INCLUDE MOLD FLASH, THE BAR BURRS AND GATE BURRS. MOLD FLASH,THE BAR BURRS AND GATE BURRS SHALL NOT EXCEED 0.066"(0.15mm) PER END DIMENSION "E1" DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH NOT EXCEED 0.010" (0.25mm) PER SIDE. 4. DIMENSION "b" DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.003"(0.08mm) TOTAL IN EXCESS OF THE "b" DIMENSION AT MAXIMUM MATERIAL CONDITION DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OR THE FOOT. MINMUM SPACE BETWEEN PROTRUSION AND AN ADJACENT LEAD TO BE 0.0028"(0.07mm). 5. TOLERANCE +0.010"(0.25mm) UNLESS OTHERWISE SPECIFIED. 6. OTHERWISE DIMENSION FOLLOW ACCEPTABLE SPEC. 7. REFERENCE DOCUMENT:JEDEC SPEC MS-024.
A1
ZD
e
b
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SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
SM7346
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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