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Sound Processors for BOOM BOX / Mini-component Stereo
Sound Processors
with Built-in 3-band Equalizers
BD3403FV, BD3861FS, BD3883FS
●Description
The Sound Processor has a built-in 3 Band Equalizer and can be controlled with a 2-wire serial. It is suited for a sound
quality design which incorporates various functions, ranging from source selectors, such as BOOM BOX, Mini-audio
systems and Micro-audio systems to preamplifiers at the front stage of the power amp.
●Features
1) High S/N, achieved by implementing 2-stage configuration of Front Volume and Rear Volume.
2) Provides surround and rear volume with Soft-switch to reduce a shock sound during switching functions(BD3883FS).
3) Volume and tone implemented with the resistance ladder circ uit
(to achieve high performance with low noise and low distortion).
4) Uses the BiCMOS process that achieves low-consumption current, which contributes to an energy-saving design.
Using the BiCMOS process, has the advant age in quali ty over the scaling dow n of the internal regulators and heat controls.
5) SSOP-A32 and SSOP-B40 are used for the packages. Input pins and output pins are organized and separately laid
out so as to keep the signal flows in one dire ction which consequently, simplify pattern layout of the set board and
decrease the board dimensions.
●Applications
BOOM BOX, mini-audio systems, and micro-au dio systems.
●Product lineup
Parameter BD3403FV BD3861FS BD3883FS
Operating Voltage Range 6.5 to 9.5V 6.5 to 9.5V 6.5 to 9.5V
Equalizer 3 band
(BASS, MIDDLE, TREBLE) 3 band
(BASS, MIDDLE, TREBLE) 3 band
(BASS, MIDDLE, TREBLE)
Front Volume 0 to -30dB/2dB step 0 to -50dB/2dB step
-50 to -70d B/4dB step, -∞dB 0 to -87dB/1dB step, -∞dB
Rear Volume 0 to -59dB/1dB step, -∞dB 0 to -59dB/1dB step, -∞dB 0, -10dB
Input Gain 0 to 26dB/2dB step 0 to 26dB/2dB step 0, 6, 12, 16, 20, 23, 26, 29dB
Microphone Input ○ ○
Surround ○ ○
Package SSOP-B40 SSOP-A32 SSOP-A32
●Absolute maximum ratings (Ta=25℃)
Prameter Symbol Ratings Unit
BD3403FV BD3861FS,BD3883FS
Power Supply Voltage Vcc 10 10 V
Power Dissipation Pd 900*1 950*2 mW
Input Voltage Range Vin GND-0.3 to VCC+0.3 GND-0.3 to VCC+0.3 V
Operating Temperature Range Topr -25 to +75 -25 to +75 ℃
Storage Temperature Range Tstg -55 to +125 -55 to +125 ℃
*1 Reduced by 9.0 mW/℃ over 25℃, when installed on the standard board (size: 70×70×1.6mm) for (BD3403FV).
*2 Reduced by 9.5 mW/℃ over 25℃, when installed on the standard board (size:70×70×1.6mm) for (BD3861FS,BD3883FS).
●Operating voltage range
Prameter Symbol Ratings Unit
BD3403FV Vcc 6.5 to 9.5 V BD3861FS
BD3883FS
No.10086EAT01
Technical Note
2/15
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BD3403FV,BD3861FS,BD3883FS
●Electrical cha r acteristics
◎BD3403FV
VCC=9V, f=1KHz, VIN=1Vrms, Rg=600Ω, RL=10kΩ, Ta=25℃, Input Gain=0dB, VOL=0dB,
Bass, Middle, Treble=0dB, Surround=OFF, unless otherwise noted.
Parameter Symbol Limits Unit Condition
Min. Typ. Max.
TOT AL
Circuit Current IQ - 16.0 30.0 mA At no signal
Output Voltage Gain GV -1.5 0.0 1.5 dB GV20log(VOUT/VIN)
Total Harmonic Distortion ratio THD - 0.02 0.08 % 400 to 30kHz BPF
Maximum Output Voltage VOM 2.0 2.5 - Vrms THD1%
Output Noise Voltage VNO - 1.8 6.0 µVrms Rg0kΩ, IHF-A
Cross-talk between Channels CT - 3.0 9.0 µVrms Rg0kΩ, IHF-A
INPUT
6dBSW Gain GV6 5 6 7 dB
VIN
200mVrms
GV620log(VOUT/VIN)
Input Voltage Gain 1 GvmaxI1 -1 *2 +1 dB
VIN
200mVrms, Fr om 0 to 10dB
GvmaxI1=20log(VOUT/VIN)
Input Voltage Gain 2 GvmaxI2 -1.5 *2 +1.5 dB VIN
200mVrms
From 12 to 26dB
GvmaxI220log(VOUT/VIN)
Input Gain Switching Step GvmaxIst - 2 - dB From 0 to 26dB
Input Total Harmonic
Distortion ratio THDI - 0.02 0.08 % 400 to 30kHz BPF
Input Maximum Output
Voltage VOMI 2.0 2.5 - dB THD1%
Cross-talk between Selectors CS - -80.0 -70.0 dB Rg=0kΩ, IHF-A
CS20log(VOUT/VIN)
Input Impedance RI 35.0 50.0 65.0 kΩ RI51k×VOUT/ (VIN-VOUT)
E Input SW Attenuation GRE - -20.0 -15.0 dB GRE20log(VOUT/VIN)
INPUT
VOLUME
Input Volume 1 GIV1 -2 *3 +2 dB From 0 to -30dB
GIV120log(VOUT/VIN)
Volume Switching Step 1 GIVst1 - 2 - dB From 0 to -30dB
OUTPUT
VOLUME
Output Volume GOV -1 *1 +1 dB
From 0 to
–
59dB
Gov=20log(VOUT/VIN)
Output Switching Step GOVst - 1 - dB Fr om 0 to –59dB
Maximum attenuation GminO - - -90.0 dB IHF-A, GminO=20log(VOUT/VIN)
SURROUND
Surround Gain
CH1→CH2 Gsur1 5 7 9 dB VIN=200mVrms, f=1kHz
Surround Gain
CH2→CH1 Gsur2 5 7 9 dB VIN=200Vrms, f=1kHz
BASS
Bass Boost Gain GBB -2 *1 +2 dB VIN=200mVrms, f=90Hz,
From 0 to 14dB
GBB=20log(VOUT/VIN)
Bass Cut Gain GBC -2 *1 +2 dB VIN=200mVrms, f =90Hz,
From –14 to 0dB
GBC=20log(VOUT/VIN)
Bass Switching Step GBST - 2 - dB VIN=200mVrms, f=90Hz
MIDDLE
Middle Boost Gain GMB -2 *1 +2 dB VIN=200mVrms, From 0 to 12dB
GMB=20log(VOUT/VIN)
Middle Cut Gain GMC -2 *1 +2 dB VIN=200mVrms, From -12 to 0dB
GMC=20log(VOUT/VIN)
Middle Switching Step GMST - 2 - dB VIN=200mVrms
TREBLE
Treble Boost Gain GTB -2 *1 +2 dB VIN=200mVrms, f=10kHz
From 0 to 12dB
GTB=20log(VOUT/VIN)
Treble Cut Gain GTC -2 *1 +2 dB VIN=200mVrms, f=10kHz
From -12 to 0dB
GTC=20log(VOUT/VIN)
Treble Switching Step GTST - 2 - dB VIN=200mVrms, f=10kHz
MIC
Microphone Voltage Gain GMIC 4.5 6.0 7.5 dB VIN=200mVrms
GMIC=20log(VOUT/VIN)
*1 *2 Typ. is set to the value descrived in condition.
Min. and Max. mean the error.
Technical Note
3/15
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© 2010 ROHM Co., Ltd. All rights reserved.
BD3403FV,BD3861FS,BD3883FS
BD3861FS
VCC=9V, f=1KHz, VIN=1Vrms, Rg=600Ω, RL=10kΩ, Ta=25℃, Input Gain=0dB, VOL=0dB,
Bass, Middle, Treble=0dB, unless otherwise noted.
Parameter Symbol Limits Unit Condition
Min. Typ. Max.
TOT AL
Circuit Current IQ - 13.0 26.0 mA At no signal
Output Voltage Gain GV -1.5 0.0 1.5 dB GV=20log(VOUT/VIN)
Total Harmonic Distortion THD - 0.02 0.08 % 400 to 30kHz BPF
Maximum Output Voltage VOM 2.0 2.5 - Vrms THD=1%
Output Noise Voltage VNO - 8.0 15.0 µVrms Rg=0kΩ, IHF-A
Cross-talk between Channels CT - -80 -70 dB Rg=0kΩ, IHF-A
INPUT
6dB SW Gain GV6 5 6 7 dB VIN=200mVrms
GV6=20log(VOUT/VIN)
Input Voltage Gain 1 GvmaxI1 -1 *1 +1 dB
VIN=200mVrms
From 0 to 10dB
GvmaxI1=20log(VOUT/VIN)
Input Voltage Gain 2 GvmaxI2 -1.5 *1 +1.5 dB VIN=200mVrms, From 12 to 26 dB
GvmaxI2=20log(VOUT/VIN)
Input Gain Switching Step GvmaxIst - 2 - dB From 0 to 26dB
Input Total Harmonic Distortion THDI - 0.02 0.08 % 400 to 30kHz BPF
Input Maximum Output V oltage VOMI 2.0 2.5 - dB THD=1%
Cross-talk between Selectors CS - -80.0 -70.0 dB Rg=0kΩ, IHF-A
CS=20log(VOUT/VIN)
Input Impedance RI 35.0 50.0 65.0 kΩ RI=51k×VOUT/ (VIN-VOUT)
E Input SW Attenuation GRE - -20.0 -15.0 dB GRE=20log(VOUT/VIN)
INPUT
VOLUME
Input Volume 1 GIV1 -2 *1 +2 dB From 0 to -50d B
GIV1=20log(VOUT/VIN)
Input Volume 2 GIV2 -3 *1 +3 dB From -54 to
–
70dB
GIV2=20log(VOUT/VIN)
Volume Switching Step 1 GIVst1 - 2 - dB From 0 to -50dB
Volume Switching Step 2 GIVst2 - 4 - dB From -54 to –70dB
Maximum attenuation GminI - - -90.0 dB IHF-A, GminI=20log(VOUT/VIN)
OUTPUT
VOLUME
Output Volume GOV -1 *1 +1 dB From 0 to
–
59dB
Gov=20log(VOUT/VIN)
Output Switching Step GOVst - 1 - dB From 0 to –59d B
Maximum attenuation GminO - - -90.0 dB IHF-A
GminO=20log(VOUT/VIN)
BASS
Bass Boost Gain GBB -2 *1 +2 dB VIN=200mVrms, f=90Hz,
From 0 to 14dB
GBB=20log(VOUT/VIN)
Bass Cut Gain GBC -2 *1 +2 dB VIN=200mVrms, f =90Hz,
From -14 to 0dB
GBC=20log(VOUT/VIN)
Bass Switching Step GBST - 2 - dB VIN=200mVrms, f=90Hz
MIDDLE
Middle Boost Gain GMB -2 *1 +2 dB VIN= 200mVrms, From 0 to 12dB
GMB=20log(VOUT/VIN)
Middle Cut Gain GMC -2 *1 +2 dB VIN=200mVrms, F rom -12 to 0dB
GMC=20log(VOUT/VIN)
Middle Switching Step GMST - 2 - dB VIN=200mVrms
TREBLE
Treble Boost Gain GTB -2 *1 +2 dB VIN=200mVrms,
f=10kHz From 0 to 12dB
GTB=20log(VOUT/VIN)
Treble Cut Gain GTC -2 *1 +2 dB VIN=200mVrms,
f=10kHz From -12 to 0dB
GTC=20log(VOUT/VIN)
Treble Switching Step GTST - 2 - dB VIN=200mVrms, f=10kHz
MIC
Microphone Voltage Gain GMIC 4.5 6.0 7.5 dB VIN=200mVrms
GMIC=20log(VOUT/VIN)
*1 Typ. is set to the value descrived in condition.
Min. and Max. mean the error.
Technical Note
4/15
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BD3403FV,BD3861FS,BD3883FS
BD3883FS
Ta=25℃, VCC=8V, f=1kHz, Vi=200mVrms, RL=10kΩ, Rg=600Ω,
Input Selector=Ach, Input Gain=0dB, Volume=0dB, Bass=0dB, Middle=0dB, Treble=0dB,
Surround=OFF, RECOUT=OFF, unless otherwise noted.
Parameter Symbol Limits Unit Condition
Min. Typ. Max.
TOT AL
Circuit Current IQ - 8 21 mA At no signal
Total Output Voltage Gain Gv -2 0 2 dB
Total Harmonic Distortion THDO - 0.01 0.1 % BW= 400 to 30kHz
Maximum Output Voltage Vomaxo 1.6 2.1 - Vrms THD=1%
BW=400 to 30kHz
Total Residual Noise Voltage Vno - 2 10 µVrms Rg=0Ω, Vol=-∞dB
BW=IHF-A, REAR ATT =-10dB
Total Output Noise Voltage Vmno - 4 15 µVrms Rg=0Ω, Vol=0dB
BW=IHF-A
Cross-talk between Channels CTC12 - -80 -70 dB Rg=0Ω, BW=IHF-A
VOUT=1Vrms
Input Impedance Rin 70 100 130 kΩ
Output Impedance Rout - - 50 Ω
INPUT
Cross-talk between Selectors CTS1 - -80 -70 dB VOUT=1Vrms
Rg=0Ω, BW=IHF-A
VOLUME
Volume Control Range VRI -90 -87 -84 dB BW=IHF-A ,Vout=1Vrms
Volume Setting Error 1 VEI1 -2 0 2 dB 0 to -53dB,BW=IHF-A
VOUT=1Vrms
Volume Setting Error 2 VEI2 -3 0 3 dB -54 to –87dB,BW = IHF-A
VOUT=1Vrms
Maximum Attenuation Vmin - - -90 dB BW=IHF-A VOUT=1Vrms
Volume Input Impedance Rvin 39 56 73 kΩ
BASS
Bass Gain Gb -17.5 to +17.5 dB
Bass Gain Setting Error BE -2.5 0 -2.5 dB
MIDDLE
Middle Gain Gm -14 to +14 dB
Middle Gain Setting Error ME -2 0 -2 dB
TREBLE
Treble Gain Gt -14 to +14 dB
Treble Gain Setting Error TE -2 0 2 dB
SURROUND
Surround In-phase Gain Vsur1 -2 0 2 dB
Surround Single-phase Gain Vsur2 4.3 6.3 8.3 dB AC-grounding
Opposite-phase Gain Vsur3 8 10 12 dB
● This IC is not designed to be radiation-resistant.
Technical Note
5/15
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BD3403FV,BD3861FS,BD3883FS
●Control signal s pecifications
1. Signal Timing Conditions
・Data is read on the rising edge of the clock.
・Latch is read on the falling edge of the clock.
・Latch signal must terminate with the LOW state.
・To avoid malfunctions, clock and data signals must terminate with the LOW state.
1byte=8bit
Fig.1
Parameter Symbol Limits Unit
Min. Typ. Max.
Minimum Clock Width twc 2.0 - - µs
Minimum Data Width twd 2.0 - - µs
Minimum Latch Width tw1 2.0 - - µs
Data Set-up Time (DATACLK) Tsd 1.0 - - µs
Data Hold Time (CLKDATA) Thd 1.0 - - µs
Latch Set-up Time (CLKLATCH) ts1 1.0 - - µs
Latch Hold Time (DATALATCH) th1 1.0 - - µs
Latch Low Set-up Time ts 1.0 - - µs
Latch Low Hold Time th 1.0 - - µs
2. Voltage Conditions for Control Signals (BD3403FV, BD3861FS)
Parameter Condition Limits Unit
Min. Typ. Max.
“H” Input Voltage Vcc=6.5 to 9.5V 2.6 - 5.5 V
“L” Input Voltage Vcc=6.5 to 9.5V 0 - 1.1 V
3. Voltage Conditions for Control Signals (BD3883FS)
Parameter Condition Limits Unit
Min. Typ. Max.
“H” Input Voltage Vcc=6.5 to 9.5V 2.2 - 5.5 V
“L” Input Voltage Vcc=6.5 to 9.5V 0 - 1.0 V
SC
(CLOCK)
SI
DATA
LATCH
thd thdth ts ts1 th1 tsd
twc
twd
twd tw1
tsu
DATA DATA
LATCH
90% 90% 90% 90%
10% 10% 10%
90% 90% 90% 90% 90%
10% 10% 10%
twc
Low
Technical Note
6/15
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A
© 2010 ROHM Co., Ltd. All rights reserved.
BD3403FV,BD3861FS,BD3883FS
●Control data format list
(BD3403FV)
Address 1
D10 D11 D12 D13 D14 D15 D16 D17
OUTPUT Volume 1 OUTPUT Volume 2 Function Select
0 0
Address 2
D20 D21 D22 D23 D24 D25 D26 D27
INPUT Volume Surround
0:OFF
1:ON Function Select
0 1 0
Address 3
D30 D31 D32 D33 D34 D35 D36 D37
Input Selector 6dB SW
0: 0dB
1:+6dB
IN E MUTE
0:OFF
1:ON Function Select
0 0 1
Address 4
D40 D41 D42 D43 D44 D45 D46 D47
Input Gain/Bass 0: Input
Gain
1: Bass Function Select
1 0 1
Address 5
D50 D51 D52 D53 D54 D55 D56 D57
Middle/Treble 0: Middl e
1: T reble Function Select
0 1 1
(BD3861FS)
Address 1
D10 D11 D12 D13 D14 D15 D16 D17
OUTPUT Volume OUTPUT Volume 2 Function Select
0 0
Address 2
D20 D21 D22 D23 D24 D25 D26 D27
INPUT Volume Function Select
0 1 0
Address 3
D30 D31 D32 D33 D34 D35 D36 D37
Input Selector 6dBSW
0: 0dB
1:+6dB
IN E MUTE
0:OFF
1:ON Function Select
0 0 1
Address 4
D40 D41 D42 D43 D44 D45 D46 D47
Input Gain/Bass 0: Input
Gain
1: Bass
Function Select
1 0 1
Address 5
D50 D51 D52 D53 D54 D55 D56 D57
Middle/Treble 0: Middl e
1: T reble Function Select
0 1 1
Technical Note
7/15
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BD3403FV,BD3861FS,BD3883FS
(BD3883FS)
・Basic Configuration of Control Data Format
Data input direction
MSB LSB
Data
D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Data Select Address
・Control Data Formats
Data input direction Select Address
Data(1)
D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Input Gain Input Selector Treble fc 0 0
Data(2)
D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Front Volume A Front Volume B * 0 1
Data(3)
D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Bass Gain Treble Gain 1 0
Data(4)
D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Middle Gain Time
Constan
t Select REC
OUT Surroun
d Rear
Volume 1 1
○* indicates 0 or 1.
・By changing the setting of Select Address, four different control formats are selectable. (BD3883FS)
・At power-on sequence, initialize all data.
Example:
Data input direction
MSB LSB MSB LSB MSB LSB MSB LSB
Data(1) L Data(2) L Data(3) L Data(4) L
“L” means a “latch.”
・After power-on, for the second and subsequent times, only the necessary data can be selected for setting.
Example: When changing the volume:
Data input direction
MSB LSB
Data(2) L
“L” means a “latch.”
・RECOUT, Surround an d Rear Volume in Data(4) are Soft-switched using time constants. (BD3883FS)
Technical Note
8/15
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BD3403FV,BD3861FS,BD3883FS
●Block diagram, a pp lication circuit, pi n assignment
(BD3403FV)
UNIT RESISTANCE : Ω
CAPACITANCE : F
Fig.2
22232425262728293031323334353637383940 21
1 2 3 4 5 6 7 8 9 1011121314151617181920
Bass2
fo=90Hz
Bass1
fo=90Hz
Middle1
fo=1kHz
Middle2
fo=1kHz
Treble2
fc=10kHz
Treble1
fc=10kHz
0dB
～
-30dB
Vcc/2Vcc/2
25K
25K
25K
25K
25K
25K
25K
25K
25K 25K
25K
Vcc/2
100K
Logic
25K
25K
25K
25K
25K
25K
25K
25K
25K
Surround
0～26dB
2dB/STEP
0～26dB
2dB/STEP
Treble
-12dB～+12dB
2dB/STEP
Middle
-12dB～
+12dB
2dB/STEP
Bass
-14dB～+14dB
2dB/STEP
0dB～-59dB
1dB/STEP
MUTE
+
-
+
-
+
-
+
-
Vcc
+
-
10µ
+
10µ
+
+
+
3.3K
0.15µ 0.15µ
3.3K
0.15µ 0.15µ
4700p4700p
1µ 2.2K
+
+
10µ
10µ
+
10µ
+
10µ
+
10µ
+
10µ
+
10µ
+
10µ
+
10µ
+
10µ 47µ
+
+
10µ
4.7K
+
10µ
4.7K
+
10µ
10µ
10µ
3.3K
0.015µ 0.015µ
3.3K
0.015µ 0.015µ
+
47µ
Technical Note
9/15
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BD3403FV,BD3861FS,BD3883FS
(BD3861FS)
UNIT RESISTANCE : Ω
CAPACITANCE : F
Fig.3
171819202122232425262728293032 31
＋
Treble2
fC=10kHz Middle1
f0=1kHz
Middle2
f0=1kHz
OUT2
Vcc/2 Vcc/2
1615141312111098765431 2
＋
DATA
LATCH CLOOK
＋
E2
4.7K
＋
E1
＋
D2
＋
D1
＋
C2
＋
C1
＋
B2
＋
B1
＋
A2
＋
A1
Vcc
LogicVcc/2
＋
Vcc/2
＋
＋
OUT1
10µ
10µ
Bass2
f0=90Hz
Treble1
fC=10kHz
47µ
10µ
4.7K
10µ10µ10µ10µ10µ10µ10µ10µ10µ
10µ
10µ
3.3K
0.15µ
＋
Vcc/2
0dB
～
-59dB
Vcc/2
0dB
～
-59dB
＋
Bass1
f0=90Hz
0.15µ
3.3K
0.15µ
0.15µ
3.3K
0.015µ
0.015µ
3.3K
0.015µ
0.015µ
4700p4700p
0dB
～
-70dB
MIC
100K
12K
24K
＋
25K
25K
25K
25K
25K
25K
25K
25K
25K
25K
25K
25K
25K
25K
25K
25K
25K
25K
25K
25K
+
10µ
+
47µ
Vcc/2
Vcc/2
Vcc/2
Vcc/2
Technical Note
10/15
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BD3403FV,BD3861FS,BD3883FS
(BD3883FS)
When using RECOUT:
UNIT
RESISTANCE: Ω
CAPACITOR: F
Fig.4
0.22 µ
17 18 19
20 21 30
31 32 22 23
24
27 28 25 26
29
16 15
14
12 3 2 1 11 10
9
8
7 6
5 4 13
Logic
Vcc/2 Vcc/2
Vcc/2
Vcc/2
Surround
0dB
～
-
87dB
- ∞
Vcc/2
0dB
～
- 87dB
- ∞
Middle1
f0=1kHz
Treble1
fc=8.15kHz
Vcc/2
VIN
１ SEL
１ VIN2 SEL2 A
１ A2 B
１ B2 C
１ C2 D
１ D2 E
１ E2 FILTER
SC SI VCC CAP OUT2
BOUT2
BNF2 BOUT1 BNF1
MOUT2
MNF2
MOUT1
MNF1 REC2 REC1
VCC
0.33 µ
4.7k 4.7k
5.6k
5.6k
5.6k
0.1 µ
0.1
5.6k
0.1 µ
0.1 µ 4.7 µ
4.7 µ
0.01µ 0.01µ 0.01µ
0.22 µ 0.1 µ 0. 1 µ 0.1 µ 0.1 µ 0.1 µ 0.1 µ 0.1 µ 0.1 µ 0.1 µ 10 µ
Bass2
f0=80Hz
OUT1
ATT
0,-10dB
100k
100k
100k
100k
100k
100k
100k
100k
65k
35k
65k 35k
4.7 µ
4.7 µ
Treble1
fc=8.15kHz
Middle1
f0=1kHz
Bass1
f0=80Hz
ATT
0,-10dB
µ 0.01µ
0.1 µ
0,6,12,16,20,23,26,29dB
0,6,12,16,20,23,26,29dB
GND
Technical Note
11/15
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© 2010 ROHM Co., Ltd. All rights reserved.
BD3403FV,BD3861FS,BD3883FS
(BD3883FS)
When using 2ndHPF:
UNIT
RESISTANCE:Ω
CAPACITOR:F
Fig.5
56k
56k
0.1µ
17
18
19
20
21
30
31
32
22
23
24
27
28 25
26
29
16
15
14
12
3
2
1 11
10
9
8
7
6
5
4 13
Logic
Vcc/2 Vcc/2
Vcc/2
Vcc/2
Surround
Vcc/2
0dB
～
- -87dB
- -∞
Middle1
f0=1kHz
Treble1
fc=8.15kHz
Vcc/2
VIN 1 SEL1 VIN2 SEL
A
１ A2 B
１ B2 C
１ C2 D
１ D2 E
１ E2 FILTER GND
SC
SI VCCCAPOUT2
BOUT
BNF2
BOUT1 BNF1
MOUT2
MNF2
MOUT1
MNF1 REC2 REC1
VCC
0.33µ
4.7k
5.6k
5.6k
5.6k
5.6k
4.7µ
4.7µ
10µ
Bass2
f0=80Hz
OUT1
ATT
0,-10dB
100k
100k
100k
100k
100k
100k
100k
100k
65k 35k
65k 35k
Treble2
fc=8.15kHz
Middle2
f0=1kHz
Bass1
f0=80Hz
ATT
0,-10dB
0,6,12,16,20,23,26,29d
0,6,12,16,20,23,26,29d
B
0dB
-87dB
-∞
～
0.1µ0.1µ0.1µ
0.1µ0.1µ 0.1µ0.1µ 0.1µ0.1µ 0.1µ 0.1µ
4.7k
0.1µ
0.01µ 0.1µ
0.1µ
0.1µ
0.1µ
0.01µ 0.01µ 0.01µ
Technical Note
12/15
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A
© 2010 ROHM Co., Ltd. All rights reserved.
BD3403FV,BD3861FS,BD3883FS
0
5
10
15
0246810
VCC(V)
ICC(mA)
0
5
10
15
0246810
VCC(V)
ICC(mA)
-10
-8
-6
-4
-2
0
2
4
6
8
10
10 100 1000 10000 100000
FREQUENCY(Hz)
GAIN(dB)
0.001
0.01
0.1
1
10
0.001 0.01 0.1 1 10
INPUT VOLTAGE(Vrms)
OUTPUT VOLTAGE(Vrms)
0.01
0.1
1
10
0.001 0.01 0.1 1 10
OUTPUT VOLTAGE(Vrms)
THD+N(%)
0.001
0.01
0.1
1
10
0.001 0.01 0.1 1 10
OUTPUT VOLTAGE(Vrms)
THD+N(%)
-15
-10
-5
0
5
10
15
10 100 1000 10000 100000
FREQUENCY(Hz)
GAIN(dB)
+14dB
-14dB
-14dB～+14dB
2dB/step
-15
-10
-5
0
5
10
15
10 100 1000 10000 100000
FREQUENCY(Hz)
GAIN(dB)
+12dB
-12dB
-12dB～
+12dB
2dB/step
-15
-10
-5
0
5
10
15
10 100 1000 10000 100000
FREQUENCY(Hz)
GAIN(dB)
+12dB
-12dB
-12dB～
+12dB
2dB/step
0
2
4
6
8
10
12
14
16
10 100 1000 10000 100000
FREQUENCY(Hz)
GAIN(dB)
4.68kHz
5.64kHz
6.67kH
8.15kH
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
2
10 100 1000 10000 10000
0
FREQUENCY(Hz)
GAIN(dB)
Fig.6 Circuit Current – Supply Voltage
(BD3403FV) Fig.7Circuit Current – Supply Voltage
(BD3883FS) Fig.8 Voltage Gain - Frequency
Fig.9 Output Voltage - Input Voltage Fig.10 Total Harmonic Distortion ratio -
Output Voltage (BD3403FV, BD3861FS) Fig.11Total Harmonic Distortion ratio -
Output Voltage (BD3883FS)
Fig.12 Bass Gain - Frequency
（BD3403FV, BD3861FS） Fig.13 Mid dle Gain - Frequency
(BD3403FV, BD3861FS) Fig.14 Treble Gain - Frequency
(BD3403FV, BD3861FS)
Fig.15 Variable Treble Cut-off
Frequency (BD3883FS) Fig.16 2ndHPF - Frequency
(BD3883FS)
●Reference data
Technical Note
13/15
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A
© 2010 ROHM Co., Ltd. All rights reserved.
BD3403FV,BD3861FS,BD3883FS
●Notes for use
1) Numbers and data in entries are representative design values and are not guaranteed values of the items.
2) Although ROHM is confident that the example application circuit reflects the best possible recommendations, be sure to
verify circuit characteristics for your particular application. Modification of c onstants for other externally connected circuits
may cause variations in both static and transient characteristics for external components as well as this Rohm IC. Allow
for sufficient margins when determining circuit constants.
3) Absolute maximum ratings
Use of the IC in excess of absolute maximum ratings, such as the applied voltage or ope rating temperat ure range (Topr),
may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode)
when such damage is suffered. A physical safety measure, su ch as a fuse, should be implemented when using the IC at
times where the absolute maximum ratings may be exceeded.
4) GND potential
Ensure a minimum GND pin potenti al in all operating c onditions. Make sure that no pins are at a voltage below the GND
at any time, regardless of whether it is a transient signal or not.
5) Thermal design
Perform thermal design, in which there are adequate margins, by taking into account the permissible dissipation (Pd) in
actual states of use.
6) Short circuit between terminals and erroneous mounting
Pay attention to the assembly direction of the ICs. Wrong mounting direction or shorts between terminals, GND, or other
components on the circuits, can damage the IC.
7) Operation in strong electromagnetic field
Using the ICs in a strong electromagnetic field can cause operation malfunction.
8) 2-wire serial control
Because SC and SI terminals are designe d for inputting high-frequency di gital signals, wiring and layout patterns should
be routed as not to cause interference with the analog-sign al-related lines.
9) E Input external resistance (BD3883FS)
To avoid a sudden noise into E Input, external resistan ce (4.7k Ω) should be connected as close as possible to the IC termina l.
10) Function switching
Action to absorb shock sounds is taken when switching between the Volume, Treble, Middle and Bass functions.
11) Power-ON Reset (BD3883FS)
A built-in circuit for performing initialization inside the IC at Power-ON is provided. Specifically, the initial states are set
as described in the table below. In the case of the setting design, however, to be on the safe side, it is recommended
that data shall be sent to all the addresses as initial data at power-ON and, until this sending operation is completed,
MUTE shall be applied. To avoid malf unctions, serial data signals must be set to the Low state at power-ON/OFF.
Function Initial State
Input Selector MUTE
Input Gain 0 dB
RECOUT OFF
Volume ∞dB
Surround OFF
Treble 0 dB
Middle 0 dB
Bass 0 dB
Rear Volume 0dB
12) Step switching noise (BD3883FS)
For Surround and Rear Volume, an external capacitor C is attached to the CAP pin to control the switching step noise.
In the application circuit, a constant value, as an example, is shown by the CAP pin.
The time constant for charge/discharge of the capacitor C (varying between VBE to 5VBE (2.65V)) controls the slow
switching operation.
The switching time constant T is calculated as the follows:
T=2.55×105×C
VBE has temperature characteristics and may affect the value of the time constant T.
Technical Note
14/15
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A
© 2010 ROHM Co., Ltd. All rights reserved.
BD3403FV,BD3861FS,BD3883FS
13) Input Selector and Input Gain
When changing Input Selector or Input Gain, the Soft-switching is not applied. Therefore, it is recommended to implement
the MUTE function.
MUTE setting example
Fig.17
14) Constraints of serial control (BD3883FS)
On Soft-switching of the RECOUT, Surround, and Rear Volume functions, data must not be sent ser ially to the functions
before the switching operation is completed.
Fig.18
15) Function setting while muting Volume (BD3883FS)
While muting Volume, to avoid increasing residual noise, set Bass, Middl e and Treble to 0dB, Surround to OFF, and Rear
Volume to -10dB.
MUTE
SERIAL DATA
40～60ms
SERIAL DATA
INPUT SOURCE
SWITCHING
If the function for Soft-switch should serially send the data (Data(4)) on the
same Select Address, the time interval bet ween the send operations must be
set to 500 -600msec.
Data(4)
T
Data(4)
Direction
L=ON
H=OFF
Technical Note
15/15
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A
© 2010 ROHM Co., Ltd. All rights reserved.
BD3403FV,BD3861FS,BD3883FS
●Ordering part number
B D 3 4 0 3 F V - E 2
Part No. Part No.
3403
3861,3883
Package
FV: SSOP-B40
FS: SSOP-A32
Packaging and forming specific ation
E2: Embossed tape and reel
∗
Order quantity needs to be multiple of the minimum quantity.
<Tape and Reel information>
Embossed carrier tapeTape
Quantity
Direction
of feed
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
2000pcs
E2
()
Direction of feed
Reel 1pin
(Unit : mm)
SSOP-A32
1
17
16
32
0.11
0.3MIN
0.36±0.1
0.8
13.6±0.2
0.15±0.1
5.4±0.2
7.8±0.3
1.8±0.1
(MAX 13.95 include BURR)
0.1
(Unit : mm)
SSOP-B40
0.08
M
0.1 S
0.22 ± 0.1
0.65
0.15 ± 0.1
0.5 ± 0.2
7.8 ± 0.3
5.4 ± 0.2
1.8 ± 0.1
0.1
1
40
20
21
13.6 ± 0.2
(MAX 13.95 include BURR)
∗
Order quantity needs to be multiple of the minimum quantity.
<Tape and Reel information>
Embossed carrier tapeTape
Quantity
Direction
of feed
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
2000pcs
E2
()
Direction of feed
Reel 1pin
Datasheet
Datasheet
Notice - GE Rev.002
© 2014 ROHM Co., Ltd. All rights reserved.
Notice
Precaution on using ROHM Products
1. Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment,
OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you
intend to use our Products in devices requiring extremely high reliability (such as medical equipment (Note 1), transport
equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or
serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance.
Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any
damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific
Applications.
(Note1) Medical Equipment Classification of the Specific Applications
JAPAN USA EU CHINA
CLASSⅢ CLASSⅢ CLASSⅡb CLASSⅢ
CLASSⅣ CLASSⅢ
2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor
products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate
safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which
a failure or malfunction of our Products may cause. The following are examples of safety measures:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure
3. Our Products are designed and manufactured for use under standard conditions and not under any special or
extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way
responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any
special or extraordinary environments or conditions. If you intend to use our Products under any special or
extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of
product performance, reliability, etc, prior to use, must be necessary:
[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents
[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust
[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,
H2S, NH3, SO2, and NO2
[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves
[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items
[f] Sealing or coating our Products with resin or other coating materials
[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of
flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning
residue after soldering
[h] Use of the Products in places subject to dew condensation
4. The Products are not subject to radiation-proof design.
5. Please verify and confirm characteristics of the final or mounted products in using the Products.
6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied,
confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power
exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect
product performance and reliability.
7. De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual
ambient temperature.
8. Confirm that operation temperature is within the specified range described in the product specification.
9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in
this document.
Precaution for Mounting / Circuit board design
1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product
performance and reliability.
2. In principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the
ROHM representative in advance.
For details, please refer to ROHM Mounting specification
Datasheet
Datasheet
Notice - GE Rev.002
© 2014 ROHM Co., Ltd. All rights reserved.
Precautions Regarding Application Examples and External Circuits
1. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the
characteristics of the Products and external components, including transient characteristics, as well as static
characteristics.
2. You agree that application notes, reference designs, and associated data and information contained in this document
are presented only as guidance for Products use. Therefore, in case you use such information, you are solely
responsible for it and you must exercise your own independent verification and judgment in the use of such information
contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses
incurred by you or third parties arising from the use of such information.
Precaution for Electrostatic
This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper
caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be
applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,
isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).
Precaution for Storage / Transportation
1. Product performance and soldered connections may deteriorate if the Products are stored in the places where:
[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2
[b] the temperature or humidity exceeds those recommended by ROHM
[c] the Products are exposed to direct sunshine or condensation
[d] the Products are exposed to high Electrostatic
2. Even under ROHM recommended storage condition, solderability of products out of recommended storage time period
may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is
exceeding the recommended storage time period.
3. Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads
may occur due to excessive stress applied when dropping of a carton.
4. Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of
which storage time is exceeding the recommended storage time period.
Precaution for Product Label
QR code printed on ROHM Products label is for ROHM’s internal use only.
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When disposing Products please dispose them properly using an authorized industry waste company.
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Since our Products might fall under controlled goods prescribed by the applicable foreign exchange and foreign trade act,
please consult with ROHM representative in case of export.
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only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any
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third parties with respect to the information contained in this document.
Other Precaution
1. This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.
2. The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written
consent of ROHM.
3. In no event shall you use in any way whatsoever the Products and the related technical information contained in the
Products or this document for any military purposes, including but not limited to, the development of mass-destruction
weapons.
4. The proper names of companies or products described in this document are trademarks or registered trademarks of
ROHM, its affiliated companies or third parties.
DatasheetDatasheet
Notice – WE Rev.001
© 2014 ROHM Co., Ltd. All rights reserved.
General Precaution
1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents.
ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny
ROHM’s Products against warning, caution or note contained in this document.
2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior
notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s
representative.
3. The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all
information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or
liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or
concerning such information.
