Sound Processor Series for Car Audio
6ch Electronic Volume
for 5.1ch Car Theater
BD3433K
No.10085EAT01
●Description
The 6ch electronic volume for 5.1ch car theater is an electronic volume device incorporating 6ch input se lector (front/rear
independently-controlled), input gain amp (front/rear independently-controlled), 6ch independently-controlled electronic
volume (capable of soft switching), 6ch output gain amp (2-line outputs), differential input for monophonic signals, electronic
volume for monophonic signals (capable of soft switching), and mixing circuit for monophonic signals. It is provided with
the high performance functions to achieve low distortion and low noise and, furthermore, to output the 5.6Vrms high voltage.
The QFP44 package which realizes savings in space and components is used to be suited for applications such as car
audio and car navigation.
●Features
1) High voltage output of 5.6Vrms achieved
Provided with 2 lines of outputs to the built-in power amp and the pre-out
2) Volume switching noise is reduced by installing the advanced 6ch independently-controlled electronic volume
with soft switching.
3) High performance capabilities such as low distortion rate (0.001%), low noise (3µVrms)
4) Different signals from the different sources can be outputted to the front and rear sections
independently and this provides an option of rear-seat entertainment.
5) Incorporate the monophonic differential input circuit suited for inputting navigation voice and telephone speech.
These monophonic voices can be mixed with the front output signals.
6) Adopting the Bi-CMOS process achieves low current consumption, which contributes to energy-saving design.
It has the advantage in quality over scaling down and heat reduction of the internal regulators.
7) 3-wire serial interface supported for both of 3.3V and 5V microcomputers
●Applications
For car audio equipment, car navigation equipment, and hybrid systems.
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.03 - Rev.A
BD3433K
●Absolute maximum ratings(Ta=25C)
Item Symbol Terminal Rating Unit
VCC-GND ※1 10
Terminal applied voltage
VEE-GND ※1 -10
VLGC Control terminal （CS/SCK/SDA）※15.5
Power dissipation Pd
※2
Operating Temperature Topr -40 ～ +85 ℃
Storage Temperature Tastg -55 ～ +125 ℃
※1：Maximum applied voltage based on GND.
※2：Derating is done 8.5mW/℃ for Ta＞25℃.
Mounted on (Material: FR4 glass epoxy board (beaten-copper area <3%), size:70mm×70mm×1.6mm)
※3：No radiation-proof design
●Operating conditions（Operating condition at Ta=25℃）
Item Symbol Terminal Condition MIN TYP MAX Unit
Operating power supply voltage
※1： When it is within operating temperature, basic circuit function is guaranteed within operating voltage. However, setting
constant and element, voltage setting, and temperature setting are required when in operation. Other than the condition
stipulated within the range, the standard value of electrical characteristics could not be guaranteed, while original function is
retained.
VCC VCC-GND
VEE VEE-GND -9.5 -9 -7.0 V
●Electrical characteristics
Abbreviations：
“Giaj”：Setting value of Input gain adjustor “Vol”：Setting value of volume (1～6ch)
“Vol.Ex”：Setting value of volume for monaural signal “Goaja”：Setting value of output gain adjustor A
“Goajb”：Setting value of output gain adjustor B “Mix”：ON/OFF setting for mixing switch.
Measurement condition (Unless specified particularly) ：
Ta＝25℃, VCC=9V, VEE=-9V, Vin=1Vrms/1kHz, Load resistance=10kΩ, Load capacitance=10pF,
Giaj＝0dB, Vol=0dB, Goaja=0dB, Goajb=0dB, Vol.Ex=-∞dB, Mix=OFF
■ General characteristics
Item Symbol Condition MIN TYP MAX Unit
Current consumption
ICC
IEE -17 -9 -
VCO oscillation frequency Fvco - 400 - kHz
RRc
Ripple rejection
RRe
Reset operation voltage VRS
Required time
for Power on reset
TPOR
Ripple = 0.1Vrms/ 1kHz
(Input terminal AC short)
Ripple= 0.1Vrms/ 1kHz
(Input terminal AC short)
Initialize all register data by
Vcc＜VRS → Vcc＞VRS
Minimum required time to reach
3V after Vcc voltage ON.
※1
Technical Note
V
850 mW
7.0 9 9.5 V
- 10 17
40 85 - dB
30 70 - dB
- 3.4 - V
20 - - µsec
mA
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.03 - Rev.A
BD3433K
■ Logic circuit
“H” level input voltage VIH CS, SCK, SDA 2.3 - 5.5 V
“L” level input voltage
Input clock frequency f
■ Volume circuit
Voltage gain GV -1 0 1 dB
Bandwidth FW
Slew rate SR - 1.65 - V/µsec
Maximum input voltage VIM THD+N = 1% , Vol = -10dB 3.8 4.25 - Vrms
Maximum output voltage
Input impedance RI 70k 100k 130k Ω
Output impedance RO - - 50
Input gain
setting value error
Volume
setting value error
Volume
maximum attenuation
Output gain
setting value error
Gain balance
between channels
Cross-talk
between channels
Output noise voltage VNO
Residual output
noise voltage
THD+N THD
Soft switching
transition time
Technical Note
Item Symbol Terminal MIN TYP MAX Unit
VIL CS, SCK, SDA 0 - 1.0 V
SCK - - 1.5 MHz
SCK
Item Symbol Condition MIN TYP MAX Unit
Frequency, which drop -1dB towards
1kHz
VOM1
VOM3 Goajb=-4.5dB 2.2 2.5 -
THD+N = 1%
Vol = +10dB
Output reference is Giaj=0dB
EGI
Giaj=6, 12 dB, Vin=0.1Vrms
3.8 4.25 -
Vol=+23～+1, -1～-20dB
EV1
(+23～+1dB
at Vin=0.1Vrms)
EV2 Vol=-21～-40dB -1.5 0 1.5
EV3 Vol=-41～-60dB -2.0 0 2.0
EV4
Output
Vol=0dB
standard
Vol=-61～-79dB
VMU Vol=-∞dB (mute) , BW=20～20kHz - -108 -85 dB
EGOA
EGOB
CB
CTC
Goaja=
BW=20～20kHz
(Input terminal AC short)
BW=A-Weight
(Input terminal AC short)
VNR Vol=-∞dB - 2 10
Goaja=+2.5dB
Output
standard
Goajb=-4.5dB
Goajb=0dB
Vol=0dB - 2.5 10
BW=20～20kHz, Vout=1Vrms
Tss1
Tss2 1.28 msec/dB - 1.28 -
Soft switching:ON
Tss3 2.56 msec/dB - 2.56 -
0.64 msec/dB - 0.64 -
Tss4 5.12 msec/dB - 5.12 -
100 - - kHz
VrmsVOM2 Goaja=+2.5dB 5 5.6 -
Ω
-1 0 1 dB
-1.0 0 1.0
dB
-3.0 0 3.0
-1 0 1
dB
-1 0 1
-1 0 1 dB
85 106 - dB
µVrms
- 0.001 0.05 %
msec
/dB
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.03 - Rev.A
BD3433K
■ Monaural signal circuit
Common condition unless specified particularly ：
Vol=-∞dB, Giaj=Goaja= Goajb=0dB, Vol.Ex=0dB, Mix=ON
Item Symbol Condition MIN TYP MAX Unit
Voltage gain GVe Phase inversion between input and output -1.0 0 1.0 dB
Maximum input voltage VIMe THD+N=1%, Vol.Ex=-10dB 3.8 4.25 - Vrms
Input impedance RIe 19 27 35 kΩ
Vol=+15～+1, -1～-20dB
Volume setting value error
Volume
maximum attenuation
EVe1
EVe2
EVe3 Vol=-41～-60dB -2.0 0 2.0
EVe4 Vol=-61～-63dB -3.0 0 3.0
VMUe
(+15～+1dB at Vin=0.1Vrms)
Vol=-21～-40dB
Output
standard
Vol.Ex＝0dB
Vol.Ex=-∞dB (mute) ,
BW=20～20kHz
-1.0 0 1.0
-1.5 0 1.5
- -108 -85 dB
Technical Note
dB
Output noise voltage VNOe
Residual noise voltage VNRe
BW=A-Weight
(Input terminal AC short)
Vol.Ex = 0dB - 4.5 15
Vol.Ex = -∞dB
- 3.5 10
THD+N THDe BW=20～20kHz, Vout=1Vrms - 0.002 0.05 %
Common-mode signal
rejection ratio
Soft switching
transition time
CMRR BW=20～20kHz 40 60 - dB
Tsse1
Tsse2 1.28 msec/dB - 1.28 Tsse3 2.56 msec/dB - 2.56 -
Soft switching:ON
0.64 msec/dB - 0.64 -
Tsse4 5.12 msec/dB - 5.12 -
●Timing chart
CS
SCK
SDA
・When CS is “Low”, enable micro computer control data (SCK/SDA). (It doesn’t work, when it is “High”),
・Data (SDA) reads at a leading edge of clock (SCK).
・Latch reads at a leading edge of CS. (SCK has to be kept as “High” after D0 acquisition)
Tssc
D15
Tsdc Twhc Twlc
Thcd
D14
D13
D12
D1
D0
LSB MSB
µVrms
msec
/dB
Twhs Tscs
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.03 - Rev.A
BD3433K
●External Dimension
●Terminal Number, Terminal name：
Terminal
Number
1 AGNDE 12 INBFR 23 OUTAFR 34 DGND
2 INAFL 13 AGND4 24 OUTAC 35 SDA
3 INAFR 14 INBC 25 OUTASW 36 SCK
4 AGND1 15 INBSW 26 OUTARL 37 CS
5 INAC 16 AGND5 27 OUTARR 38 TEST
6 INASW 17 INBRL 28 OUTBFL 39 ADJ
7 AGND2 18 INBRR 29 OUTBFR 40 VEE
8 INARL 19 AGND6 30 OUTBC 41 AGNDM
9 INARR 20 SOUTRL 31 OUTBSW 42 VCC
10 AGND3 21 SOUTRR 32 OUTBRL 43 INEX+
11 INBFL 22 OUTAFL 33 OUTBRR 44 INEX-
Terminal name
Terminal
Number
BD3433K
QFP44（Unit：mm）
Terminal name
Terminal
Number
Lot. No.
Terminal name
Terminal
Number
Technical Note
Terminal name
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.03 - Rev.A
BD3433K
●Block diagram
INEX+
INEX-
INAFL
INAFR
INAC
INASW
INARL
INARR
INBFL
INBFR
INBC
INBSW
INBRL
INBRR
13.5K
13.5K
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
100k
13.5K
13.5K
Technical Note
Soft Switching
＋
－
AGND２
AGND1
Front
Input
Seｌector
Front
Input
Gain
(0,6,12dB)
Rear
Input
Gain
(0,6,12dB)
Rear
Input
Seｌector
AGND４
AGND３
AGND５
AGND６
AGNDE
SOUTRL
Volume
Mixing
on/off
Digital
Control
SDA
Output
Gain A
(0,+2.5dB)
Output
Gain B
(0,-4.5dB)
SCK
CS
Volume
Volume
Volume
Volume
Volume
Volume
Power
Supply
SOUTRR
AGNDM
VEE
+
+
VCO
VCC
DGND
ADJ
OUTAFL
OUTAFR
OUTAC
OUTASW
OUTARL
OUTARR
OUTBFL
OUTBFR
OUTBC
OUTBSW
OUTBRL
OUTBRR
TEST
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.03 - Rev.A
BD3433K
●Notes for use
1. Absolute Maximum Ratings;
It may cause failure if operation is beyond absolute maximum ratings of applied voltage or operating temperature. In case of
failure, it is not possible to set short mode or open mode. If particular mode requires beyond absolute maximum ratings, please
take a physical safety measure.
2. VEE electrical potential
Please minimize electrical potential of VEE terminal under any operational condition.
3. Thermal design
Please consider power dissipation (Pd) on actual operational condition and provide enough margins for thermal design.
4. Operation in intense electric field
Please note that malfunction may occur if operation is under intense electric field.
Technical Note
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.03 - Rev.A
BD3433K
●Ordering part number
B D 3 4 3 3 K - E 2
Part No. Part No.
QFP44
14.0± 0.3
10.0± 0.2
2.15± 0.1
0.05
14.0± 0.3
10.0± 0.2
44
111
0.8
0.35± 0.1
Technical Note
Package
K: QFP44
<Tape and Reel information>
2333
2234
12
0.15
1.2
0.15± 0.1
(Unit : mm)
Quantity
Direction
of feed
Embossed carrier tapeTape
1000pcs
E2
The direction is the 1pin of product is at the upper left when you hold
()
reel on the left hand and you pull out the tape on the right hand
Reel
1pin
Packaging and forming specification
E2: Embossed tape and reel
Direction of feed
Order quantity needs to be multiple of the minimum quantity.
∗
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© 2010 ROHM Co., Ltd. All rights reserved.
2010.03 - Rev.A
Notes
No copying or reproduction of this document, in par t or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specied herein is subject to change for improvement without notice.
The content specied herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specied in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specied herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
Notice
The Products specied in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, ofce-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specied in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, re or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, re control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
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The Products are not designed or manufactured to be used with any equipment, device or
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