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PDF BD3461FS Data sheet ( Hoja de datos )
| Número de pieza | BD3461FS | |
| Descripción | General-Purpose 6ch Electronic Volume | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
General-Purpose 6ch Electronic Volume
with Built-in Advanced Switch
BD3461FS
General Description
BD3461FS is a 6ch electronic volume which has the
best audio efficiency in the industry. It has an external
sound mixing function (with volume) in the favorite
channel for mixing of portable audio and car
navigation’s guide sound. Also, BD3461FS has a
volume switching shock sound prevention technique
called “Advanced Switch,” supporting the construction
of high quality car audio space by simple control.
Features
Reduce switching noise of volume by using
Advanced Switch circuit.
Mixing for external sound monaural 3ch. It is
possible that is mixed to front/Rear/Sub output
Lch/Rch independently.
Built-in 3ch ATT for external sound mixing that can
be controlled independently.
Built-in buffered ground isolation amplifier inputs,
ideal for external input.
Energy-saving design resulting in low-current
consumption by utilizing the Bi-CMOS process. It
has the advantage in quality over scaling down the
power heat control of internal regulators.
Arranges all I/O terminals together for easier PCB
layout and smaller PCB area.
I2C BUS can be controlled by 3.3V / 5V.
Key Specifications
Power Supply Voltage Range:
Circuit Current (no signal):
Total Harmonic Distortion:
Maximum Input Voltage:
Cross-talk between Selectors:
Volume Control Range:
Output Noise Voltage:
Residual Output Noise Voltage:
Operating Temperature Range:
7.0V to 9.5V
25mA(Typ)
0.0004% (Typ)
2.35Vrms (Typ)
-105dB (Typ)
+23dB to -79dB
1.9µVrms(Typ)
1.6µVrms (Typ)
-40°C to +85°C
Package
W(Typ) x D(Typ) x H(Max)
SSOP-A24
10.00mm x 7.80mm x 2.10mm
Applications
It is optimal for car audio. It can also be used for car
navigation, audio equipment of mini Compo, micro
Compo, DVD, TV, etc.
Typical Application Circuit
FIL GND
10μ
SDA
SCL CS VCC OUTF1 OUTF2 OUTR1 OUTR2 OUTS1 OUTS2
10μ
0.1μ
4.7μ
4.7μ
4.7μ
4.7μ
4.7μ
4.7μ
2.2K
24 23 22 21 20 19 18 17 16 15 14 13
VCC
VCC/2 GND
I2C BUS LOGIC
■6ch Volume
+2+32d3BdBto～-7-97d9BｄB/ /1d1dBB step,-∞
★：Advanced switch circuit
■Mixing ATT
Independent
0d0BdBto～-3-23d2BdB/ 8/d8BdB step,
control
-3-23d2BdtBo～-6-46d4Bd/B1/61d6BdB step,-∞
100k 100k 100k 100k 100k 100k 100k 100k 100k
BUFFERED
GND ISO AMP
100k 100k
1 2 3 4 5 6 7 8 9 10 11 12
1μ
1μ 1μ
1μ
1μ
1μ
10μ
10μ
10μ
4.7μ
10μ
10μ
INF1 INF2 INR1 INR2 INS1 INS2 EXT1 EXT2 EXT3 DIFFOUT NIN
PIN
Unit
R : [Ω]
C : [F]
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product has no designed protection against radioactive rays
1/28
TSZ02201-0C2C0E100360-1-2
16.Dec.2015 Rev.001
1 page  
BD3461FS
Electrical Characteristics – continued
(Unless specified, Ta=25°C, VCC=8.5V, f=1kHz, VIN=1Vrms, Rg=600Ω, RL=10kΩ, INF1 input, Volume 0dB)
Parameter
Symbol
Min
Limit
Typ
Max
Unit
Conditions
Input Impedance
RIN_V
70 100 130
kΩ
Maximum Input Voltage
VIM
2
2.35
－
Vrms
VIM at THD+N(VOUT)=1%
BW=400Hz-30kHz
Maximum Gain
Maximum Attenuation *
Step Resolution
GV_BST
21
23
25
GV_MIN
GV_STEP
－
－
-109
1
-90
－
Gain=23dB
dB VIN=100mVrms
GV=20log(VOUT/VIN)
Volume=-∞dB
dB GV=20log(VOUT/VIN)
BW=IHF-A
GAIN&ATT=+23dB to
dB -79dB
Gain Set Error
GV_ERR
-2
0
+2 dB Gain=+1dB to +23dB
Attenuation Set Error 1
GV_ERR1
-2
0
+2 dB ATT=-1dB to -15dB
Attenuation Set Error 2
GV_ERR2
-3
0
+3 dB ATT=-16dB to -47dB
Attenuation Set Error 3
GV_ERR3
-4
0
+4 dB ATT=-48dB to -79dB
Output Impedance
Maximum Output Voltage
ROUT
VOM
- － 50 Ω VIN =100mVrms
2
2.35
－
THD+N=1%
Vrms BW=400Hz-30kHz
Input Impedance
Maximum Attenuation *
RIN_M
GM_MIN
70
－
100 130
-90 －
kΩ
dB
GM=20log(VOUT/VIN)
BW=IHF-A, ATT=-∞dB
Step Resolution 1
GM_STEP1
－
8
－
dB ATT=0dB to -32dB
Step Resolution 2
GM_STEP2
－
16
－
dB ATT=-32dB to -64dB
VP-9690A (Average value detection, effective value display) filter by Matsushita Communication is used for * measurement.
Phase between input / output is same.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/28
TSZ02201-0C2C0E100360-1-2
16.Dec.2015 Rev.001
5 Page 
BD3461FS
(2) I2C BUS FORMAT
MSB
LSB
S Slave Address
1bit 8bit
S
Slave Address
A
Select Address
Data
P
MSB
LSB MSB
LSB
A Select Address A
Data
AP
1bit 8bit 1bit 8bit 1bit 1bit
= Start condition (Recognition of start bit)
= Recognition of slave address. The first 7 bits correspond to the slave address.
The least significant bit is “L” which corresponds to write mode.
= ACKNOWLEDGE bit (Recognition of acknowledgement)
= Select address corresponding to volume, bass or treble.
= Data on every volume and tone.
= Stop condition (Recognition of stop bit)
(3) I2C BUS Interface Protocol
(a) Basic Format
S Slave Address
MSB
LSB
A Select Address
MSB
LSB
A Data A P
MSB LSB
(b) Automatic Increment (Select Address increases (+1) according to the number of data.)
S Slave Address A Select Address A Data1 A Data2 A ････ DataN
MSB
LSB MSB
LSB MSB LSB MSB LSB
(Example) ① Data1 shall be set as data of address specified by Select Address.
② Data2 shall be set as data of address specified by Select Address +1.
③ DataN shall be set as data of address specified by Select Address +N-1.
MSB LSB
A
P
(c) Configuration Unavailable for Transmission (In this case, only Select Address1 is set.)
S Slave Address A Select Address1 A Data A Select Address 2 A Data A
MSB
LSB MSB
LSB MSB LSB MSB
LSB MSB LSB
(Note) If any data is transmitted as Select Address 2 next to data, it is recognized
as data, not as Select Address 2.
P
(4) Slave Address
Because the slave address can be changed by the setting of CS, it is possible to use two chips at the same time on
identical BUS.
MSB
LSB
SEL Voltage Condition
GND to 0.2 x VCC
A6 A5 A4 A3 A2 A1 A0 R/W 80H
1 0 0 0 0 0 0 0 84H
0.8 x VCC to VCC
10000100
Establish the CS voltage to define the setting.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/28
TSZ02201-0C2C0E100360-1-2
16.Dec.2015 Rev.001
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BD3461FS.PDF ] | |
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