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TC9482F-TC9482N
SYSTEM ELECTRONIC VOLUME CONTROL
TOSHIBA
TC9482N/F
TOSHIBA CMOS DIGITAL INTEGRATED CIRCUIT SILICON MONOLITHIC
TC9482N, TC9482F
SYSTEM ELECTRONIC VOLUME CONTROL
The TC9482N and TC9482F are six-channel electronic
volume control ICs developed for Hi-Fi audio equipment.
Since all six channels can be individually controlled, the
devices are optimum for audio equipment with multiple
outputs.
FEATURES
It Sound volume can be controlled in 97 steps from 0 to
-95dB or up to an infinite level in 1dB increments.
o Incorporating six channels of volume control circuits, the
device allows independent volume control.
It Can operate with a single or dual power supplies.
ct Can control up to 4 chips on the same bus by using chip
select input.
0 Built-in interface for 5-V microcomputers.
0 Thanks to its polysilicon resistor, the device allows you to
configure a Iow-distortion, high-performance volume
control system.
0 Two packages supported: 28-pin shrink DIP and 28-pin
flat package.
TC9482 N
SDlP28-P-400-1 .78
TC9482F
SOP28-P-450-1.27
Weight
SD|P28-P-400-1.78 . 2.2
SOP28-P-450-1.27 : 0.8
2001 -06-1 9
TOSHIBA
PIN CONNECTIONS
BLOCK DIAGRAM
L-OUTA
L-A-GNDA
L-OUTB
L-A-GNDB
L-OUTC
L-I N C
L-A-GNDC
TC9482N/F
NC vss VDD TEST
m m C2s f'\
'x?..) 1.1f \28/ lily
r ___________ "I
L-OUTA I R-OUTA
L-INA IVdRB l R-INA
<: latch ttCIC- I
8dB - i
<2: VR <1: - l
L-A-GNDA latch l R-A-GNDA
L-OUTB 3 I R-OUTB
1dB decoder <7; E
L-INB VR l Same as L-ch R-INB
<:::: latch l Circuit
Klr VR - - I
<: - I
L-A-GNDB latch T 4 to 13 I R-A-GNDB
decoder l
L-OUTC l R-OUTC
L-INC 1VdRB I R-INC
4 latch t:::Cc I
4 VR (1: l
L-A-G N DC latch 'rr - R-A-G N DC
Shift register(32 BIT) I Strobe. ge.nerate
I circuit
CSI Level shift circuit CS2
GND STB
CK DATA
2 2001 -06-1 9
TOSHIBA TC9482N/F
PIN DESCRIPTION
PIN No. SYMBOL PIN NAME FUNCTION REMARK
1 VSS Nega.tive. power
supply pm 0 Power Su I Pi -
. . pp y ms
28 VDD Psitive power supply
3 L-OUTA
26 R-OUTA
6 L-OUTB .
22 R-OUTB Volume output pm
9 L-OUTC o Volume circuit
19 R-OUTC
4 L-INA
25 R-INA OUTX o-
7 L-INB . . INX
22 R-INB Volume input pIn -
10 L-INC
19 R-INC
5 L-A-GNDA A-GNDX
24 R-A-GNDA
8 L-A-GNDB .
21 R-A-GNDB Analog GND pm
11 L-A-GNDC
18 R-A-GNDC
12 CSI Up to 4 chips on the same bus can be
Chip select input pin used by switching over chip select -
17 C52 code.
14 CK Clock input pin Inputs clock for serial data transfer. Low
15 DATA Data input pin Inputs control data for setting volume. thLZinzld
16 STB Strobe input pin Inputs strobe for writing data. input pin
13 GND Digital GND pin Digital ground pin -
27 TEST Test Pin Normally connect to VDD pin. -
2 NC No connection - -
2001 -06-1 9
TOSHIBA TC9482N/F
OPERATIONS
1. Volume Control Circuit
The volume control circuit incorporates two volume controls, each consisting of a resistor array and
a CMOS analog switch.
VR1 attenuates from 0 to 7dB in 1-dB steps. VR2 attenuates from 0 to-88dB in 8-dB steps.
In total, volume is controlled from 0 to 95 dB in 1-dB steps.
OUTA O
(VR1) OdB
-ldB -8dB
-2di! -16dB
-3dil -24dl?
ig,- -4dB -32dB
-5dB -40dB
-6dB g- -48dB
-7dB -56dB
- -cxodB -64dB
A-GNDA C) made
r ---------------- ,
OUTB o-i, i
INB C)-}, Sameasabove I
A-GNDB LJ-i ---------------- J
r ------------------- ,
OUTC C)-',, E
INC o-I, Sameasabove E
A-GNDC o-i l
4 2001-06-19
TOSHIBA
2. Setting up volume value (amount of attenuation)
Serial data consisting of 32 bits is used to set a volume value.
0 Data format
(LSB) (MSB)
1 2 3 4 " 27 28 29 30 31 32
DATA I001 |D02 I D03 I D04I 'il I"0" I "0" I CI I C2 I c3 I at I
ff I'I
(1)Assignment of volume control data
1 2 3 4 S 6 7 8
I D01 I D02 I D03 I D04 I D05 I D06 I D07 I "0" I : Left channel volume data
(D11 x012 I D13 I D14 I D15 I D16 I D17 I "0" ) : Right channel volume
'rAl(Bl(cll"0"l .' Volume select data
r's0l(s1r'0"l("o"] : Volume switching
Timing data
r'"0"l("0''li"0"l("0"] : Dummy data
29 30 32
:Chip select data
TC9482N/F
2001 -06-1 9
TOSHIBA
TC9482N/F
(2) Volume setup data
The bits "D01" through "D07" are the left channel volume setup data, the bits "D11" through
"D17" are the right channel volume setup data. For details, see the tables below.
STEP D01 D02 D03 D04 D05 D06 D07 STEP D01 D02 D03 D04 D05 D06 D07
D11 D12 D13 D14 D15 D16 D17 D11 D12 D13 D14 D15 D16 D17
OdB o o o o o o 0 -48dB o o o o 1 1 o
-1dB 1 o o o o o o -49dB 1 o o o 1 1 o
-2dB o 1 o o o o 0 -50dB o 1 o o 1 1 o
-3dB 1 1 o o o o o -5ldB 1 1 o o 1 1 o
-4di? o o 1 o o o o -52di? o o 1 o 1 1 o
-5dB 1 o 1 o o o o -53dB 1 0 1 o 1 1 o
-6dB o 1 1 o o o o -54dB o 1 1 o 1 1 o
-7di? 1 1 1 o o o o -55dB 1 1 1 o 1 1 o
-8dB o o o 1 o o 0 -56dB o o o 1 1 1 o
-9dB 1 o 0 1 o o o -57di? 1 o o 1 1 1 o
-10di? o 1 0 1 o o 0 -58di? o 1 o 1 1 1 o
-11dB 1 1 o 1 o o o -59dB 1 1 o 1 1 1 o
-12dB o o 1 1 o o 0 -60di? o o 1 1 1 1 o
-13di? 1 o 1 1 o o o -61dB 1 o 1 1 1 1 o
-14dit o 1 1 1 o o o -62dB o 1 1 1 1 1 o
-15dB 1 1 1 1 o o o -63dB 1 1 1 1 1 1 o
-16dB o o o o 1 o 0 -64dB o o o o o o 1
-17di? 1 o o o 1 o o -65dB 1 o o o o o 1
-18dB o 1 o o 1 o o -66di? o 1 o o o o 1
-19dB 1 1 o o 1 o o -67di? 1 1 o o o o 1
-20dB o o 1 o 1 o o -68di? o o 1 o o o 1
-21dB 1 o 1 o 1 o o -69dB 1 o 1 o o 0 1
-22 dB 0 1 1 o 1 o o -70dB o 1 1 o o o 1
-23 dB 1 1 1 o 1 o o -71di? 1 1 1 o o o 1
-24dB o o o 1 1 o o -72dB o 0 o 1 o o 1
-25dB 1 o 0 1 1 o 0 -73di? 1 o o 1 o o 1
-26dB o 1 0 1 1 o o -74di? o 1 o 1 o o 1
-27dB 1 1 o 1 1 o o -75dB 1 1 0 1 o 0 1
-28dB o o 1 1 1 o o -76dB o o 1 1 o o 1
-29di? 1 o 1 1 1 o o -77di? 1 o 1 1 o o 1
-30dB o 1 1 1 1 o 0 -78dB o 1 1 1 o o 1
-31dit 1 1 1 1 1 o o -79dB 1 1 1 1 o o 1
-32 dB 0 o 0 o o 1 o -80di? o o o o 1 0 1
-33 dB 1 o o o o 1 0 -81dB 1 0 o o 1 0 1
-34dit o 1 o o o 1 o -82di? o 1 o o 1 o 1
-35dB 1 1 0 o o 1 o -83di? 1 1 o o 1 o 1
-36dB o o 1 o o 1 o -84dB o o 1 o 1 o 1
-37dit 1 o 1 o o 1 o -85di? 1 o 1 o 1 o 1
-38dB o 1 1 o o 1 o -86dB o 1 1 o 1 o 1
-39dB 1 1 1 o o 1 o -87dB 1 1 1 o 1 o 1
-40dB o o o 1 o 1 o -88dB o o o 1 1 o 1
-41dB 1 o o 1 o 1 o -89dB 1 o o 1 1 o 1
-42 dB 0 1 o 1 o 1 o -90dB o 1 o 1 1 o 1
-43 dB 1 1 o 1 o 1 o -91di? 1 1 o 1 1 o 1
-44dB o o 1 1 o 1 o -92di? o o 1 1 1 o 1
-45dit 1 o 1 1 o 1 o -93dB 1 o 1 1 1 o 1
-46di? o 1 1 1 o 1 o -94di? o 1 1 1 1 o 1
-47dB 1 1 1 1 o 1 o -95dB 1 1 1 1 1 o 1
-OO dB 0 o o o o 1 1
2001 -06-1 9
TOSHIBA TC9482N/F
(3) Volume control select data
"A", "B", and "C" are data used to select volume controls.
"A"=1 selects volume control VR-A, "B" =1 selects volume control VR-B, "C" selects volume
control VR-C.
("A" = "B" = "C" =1 sets all volume controls simultaneously.)
(4) Volume control switching timing
"SO" and "S1" are data used to set the timing of volume control switching.
Depending on the setting of "SO" and "SI", the timing for switching VR1 (1-dB step volume
control) and VR2 (8-dB step volume control) can be selected as in sync with either the rise or
the fall of the STB signal. Thus, noise generated at switching can be reduced by making the
timing of VR1 and VR2 switching asynchronous when increasing or decreasing the volume.
so S1 VR1 VR2
(*) I Indicates synchronization with the rise of the STB signal.
I Indicates synchronization with the fall of the STB signal.
0 Volume control switching timing at volume up (set "SO" to "0" and "S1" to "1)
DATA K 32-bit Gdata \
ck-rl-rl-rl-ln-Fl-p-rl-rl-rl-Fl-rl-
STB 32 '-l-
1dB VR(VR1) OdB , -7dB
(example) -24d3-r-23 dB{ I }
ads VR(VR2) -24dB J,(-160
Set as desired Tw
0 Volume switching timing at volume down (set "SO" to "1" and "S1" to "0")
DATA I 32-blt2: data l
"ck-rl-rl-rl-ln-ln-p-rl-rl-ln-rl-rl-.
STB 32 I—*—
1dB VR(VR1) -7dil X OdB
(example) --y-msds-L :
BdB VR(VR2) -40dB
Set as desired Tw
7 2001-06-19
TOSHIBA TC9482N/F
(5) Chip select code (C1 to C4)
Chip select code consists of four bits: "C1", "C2", "C3", and "C4".
"C3" and "C4" are fixed to "01".
"C1" and "C2" are variable bits. They are set according to the input level of pins CS1 and CS2.
CS1C52 C1 C2 C3 C4
3. Serial data timing
Make sure that CK, DATA and STB are input to the device at the timings shown below.
(001) (D02) (D03) - (C4) (DOI) (D02)
DATA X X X :‘E X l / X
STB ":'.._i.i..:i-...i:.' " 'i,' T, i..'
5 5 2 : "
3 a Ea i i a a b
P-":"", E
.iri'oi. 5
5 b 5 a>0.5ps,b>1.0ps
4. Operating with a single or dual power supplies
The TC9482N, TC9482F can operate off either a single power supply or dual power supplies.
0 Operation off single power supply 0 Operation off dual power supplies
VDD - VDD
A-GND _--------------------- GND/A-GND
(1/2 VDD) JLFL
GND/l/ss - vss
Analog signal Logic signal Analog signal Logic signal
8 2001-06-19
TOSHIBA TC9482N/F
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC SYMBOL RATING UNIT
Power Supply Voltage VDD -0.3-36 V
GND Block Input Voltage VIN -0.3-VDD+0.3 V
Power Dissipation PD 300 mW
Operating Temperature Topr -40-85 "C
Storage Temperature Tstg -65--150 "C
ELECTRICAL CHARACTERISTICS
(Referenced to VDD = 15V, vss = - 15V at Ta = 25°C unless otherwise noted)
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
Operating Supply Operating with dual power
V -V - 12. ~ 4. V
Voltage (1) DD ss supplies 0 3 0
Operating Supply Operating with single --
Voltage (2) VDD GND power supply 6.0 18.0 V
Operating Supply .
Current IDD - Non loaded, no input - 6.0 12.0 mA
Input "H"l/ NH»! IIH CK, DATA, STB, VIN = VDD - - 1.0 A
Current ''L''LHI,, IIL - CSI, CS2 pins VIN = 0v -1.0 - - /2
Input ''H''LHI, VIH1 CK, DATA, STB pins 4.0 -- VDD V
Voltage (1) "L" l/ 'vs'Jt, V|L1 - VDD=6.0--18.0V 0.0 ~ 1.0
''H''LHI, V V x0.7 ~ V
Input " " a IHit - CSI, CS2 pins DD DD V
Voltage (2) L l/ _ " VILZ 0.0 -- VDDXO.3
Volume RVR1 - 14.0 20.0 26.0
. Resistance
Resistance VR2 - k0
Volume RVR2 - 35.0 50.0 65.0
Resistance
Step Deviation AV - - - 1.0 - 1.0 dB
Total Harmonic o
Distortion THD VIN = 1Vrms - 0.005 - hl
. f = 1 kHz
Output Noise Voltage VN - IN - 1.2 - PVrms
Channel CT Rg = 600 ft, RL =k100 k0 - 80 - dB
Maximum Attenuation ATT-M BW = 20 Hz -- 20 Hz - 100 - dB
A-SW ON Resistance RON - All A-SW - 350 500 n
Clock Frequency fCK - CK, DATA, STB pins - - 1.0 MHz
Clock Timing TCK - CK, DATA, STB pins 0.5 - - ,as
9 2001-06-19
TOSHIBA
TC9482N/F
EXAMPLE OF APPLICATION CIRCUIT
VSS=-15V VDD=+15V
. 47/rF 47pF U
-.,+ -es+
ll li-.
0.1/1F M 0.1ptF
0 Cai,
L-ch outA ( CC - + Ci] Ciii + - CC. R-ch outA
L-ch inA ) cc " + "A' Ciii + - CC ( R-ch inA
Ci? Cid,
L-ch outB .CC -- + Ci? cis + - CC. R-ch outB
L-ch inB .CC ' + 0 Cd, + - CC. R-ch inB
L-ch outC .CC - + 0 Cao? er. - CC. R-ch outC
L-chinC .CC --+ C1ii' C1ii' +-‘ CC. R-chinC
VDD CE Cui VDD
CSI C.' . ca 0 T "cs,
i G, Cib? i
Ci?, Clii',
DATA STB
(*) CC indicates the capacitor from 1 M' to IOM'.
(Note) Since a high-frequency digital signal is input to the CK, DATA and STB pins, corrective
measures must be taken to prevent it from getting mixed in the analog circuit to
generate noise by, for example, guarding the above signal lines with ground patterns
or using shielding wire for these lines.
10 2001-06-19
TOSHIBA TC9482N/F
PACKAGE DIMENSIONS
SDIP28-P-400-1.78 Unit : mm
28 15 "i
J-lr-Ir-nr-Ill-lr-lr-ll-nm.'-)?'--):'-', O
b) Q '1
LucJt-JL.JcJLdL-lcjclcjLLclcicy
26.1MAX
25.6h0.2
G! c'?-
r3! 2:
0') tD
g 'li?.;
1.243TYP . . 0.46:0.1
Weight : 2.29 (Typ.)
11 2001-06-19
TOSHIBA TC9482N/F
PACKAGE DIMENSIONS
SOP28-P-450-1.27 Unit : mm
28 15 -
DQDDQHDHHHHQDH
N en. T;
D) 33 3 5;
no i S
j''?i''erij,i3i,li.l,l,ii,11ii IU
0.995TYP (14310.1 ra1 GE
- _ ttlp,piti
L 19.0MAX
- 18.5102 .
!itrr-t, A'?
*mmumij ti'
55m iii?',, csy,
g I |1.0:!:0.2
Weight : 0.8g (Typ.)
2001 -06-1 9
TOSHIBA TC9482N/F
RESTRICTIONS ON PRODUCT USE
000707EBA
OTOSHIBA is continually working to improve the quality and reliability of its products.
Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent
electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer,
when utilizing TOSHIBA products, to comply with the standards of safety in making a safe
design for the entire system, and to avoid situations in which a malfunction or failure of such
TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified
operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please
keep in mind the precautions and conditions set forth in the "Handling Guide for
Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc..
OThe TOSHIBA products listed in this document are intended for usage in general electronics
applications (computer, personal equipment, office equipment, measuring equipment, industrial
robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor
warranted for usage in equipment that requires extraordinarily high quality and/or reliability or
a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended
Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship
instruments, transportation instruments, traffic signal instruments, combustion control
instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA
products listed in this document shall be made at the customer's own risk.
0 The products described in this document are subject to the foreign exchange and foreign trade
OThe information contained herein is presented only as a guide for the applications of our
products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of
intellectual property or other rights of the third parties which may result from its use. No
license is granted by implication or otherwise under any intellectual property or other rights of
TOSHIBA CORPORATION or others.
0 The information contained herein is subject to change without notice.
13 2001-06-19
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