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PDF BD34704KS2 Data sheet ( Hoja de datos )
| Número de pieza | BD34704KS2 | |
| Descripción | 7.1ch Sound Processor | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
Sound Processors for Home Theater Systems
7.1ch Sound Processor for High-Quality Audio
with Built-in Micro-step Volume
BD34704KS2
General description
The BD34704KS2 is an 8ch independent volume system
realized high-quality sound by improved specification of
op-amp and optimized layout of the element.The system
is designed to allow 7.1ch surround system application.
Micro-step volume can reduce the switching pop noise
during volume attenuation, so a high quality audio
system could be achieved.
This IC is available 12ch single-end input selectors to
maximum 3 zones. And also available 2 system multi
input selector.
Key Specifications
Total harmonic distortion:
Maximum output voltage:
Output noise voltage:
Residual output noise voltage:
Cross-talk between channels:
Cross-talk between selectors:
0.0004%(Typ)
4.2Vrms(Typ)
1.2μVrms(Typ)
1.0μVrms(Typ)
-105dB(Typ)
-105dB(Typ)
Package
SQFP-T80C
W(Typ) x D(Typ) x H(Max)
16.00mm x 16.00mm x 1.60mm
Features
12ch input selectors
(It is extendable to up to 18 in case of no use other
functions such as Multi input, REC output and SUB
output)
Micro-step volume can reduce the switching pop
noise during volume attenuation
Zone 3 is supported
2ch sub-volume for zone output that is available for
independent control with a micro step function
2-wire serial bus control, corresponding to 3.3/5V
SQFP-T80C
Applications
Suitable for the AV receivers, home theater systems,
etc
Typical Application Circuit
Figure 1. Application Circuit
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
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TSZ02201-0C2C0E100210-1-2
2015.2.25 Rev.002
1 page  
BD34704KS2
Datasheet
Absolute Maximum Ratings
Item
Positive power supply
Negative power supply
Power dissipation
Symbol
VCC
VEE
Pd
Rating
+7.75 (Note1)
-7.75 (Note1)
1.75 (Note2)
Unit
V
V
W
Input voltage
Operating temperature
Vin
Topr
VEE-0.2 ~ VCC+0.2
-40 ~ +85 (Note3)
V
°C
Storage temperature
Tastg
-55 ~ +150
°C
(Note1)
(Note2)
(Note3)
Caution:
The maximum voltage that can be applied based on GND.
Derating at 14.0mW/°C for operating above Ta≥25°C (mounted on 70×70×1.6mm ROHM standard board)
If it is within the operating voltage range, circuit functions and operation are guaranteed within this
operating temperature.
Operating the IC over the absolute maximum ratings may damage the IC. The damage can
either be a short circuit between pins or an open circuit between pins and the internal circuitry. Therefore,
it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated
over the absolute maximum ratings.
Operating Condition
Item
Symbol
Rating
Unit
Positive power supply
VCC
+6.5 ~ +7.5 (Note4,5)
V
Negative power supply
VEE
-6.5 ~ -7.5 (Note4,5)
V
(Note4)
(Note5)
Applying voltage based on GND.
Within the operating temperature range, basic circuit function and operation are guaranteed within this operation
voltage range. But please confirm the setting of the constants, temperature, etc. Please take note that
electrical characteristics other than defined values cannot be guaranteed, however original function will retain.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/36
TSZ02201-0C2C0E100210-1-2
2015.2.25 Rev.002
5 Page 
BD34704KS2
Datasheet
Select Address No.0 Setting Table
Function & Setting D15 D14 D13 D12 D11 D10
MUTE
00000
D9
D8
IN1 0 0 0 0 1
IN2 0 0 0 1 0
IN3 0 0 0 1 1
IN4 0 0 1 0 0
IN5 0 0 1 0 1
IN6 0 0 1 1 0
IN7 0 0 1 1 1
IN8 0 1 0 0 0
IN9 0 1 0 0 1
IN10
IN11
IN12
01010
0
1
0
1
1
Rec
on/off
01100
IN13
01101
IN14
0 01110
0
IN15
01111
IN16
10000
IN17(REC)
10001
IN18(SUB)
10010
10011
Prohibition
11111
OFF
0
D7 D6 D5 D4 D3 D2 D1 D0
Sub
on/off
0
1
0
0
Chip
Select
0
0
ON
OFF
ON
Input Selector (MAIN)
1
Rec
on/off
0
1
: Initial condition
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/36
TSZ02201-0C2C0E100210-1-2
2015.2.25 Rev.002
11 Page | ||
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