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Datasheet
Analog Sound Processor series
Sound Processor with Built-in
Surround Sound Function
BD3491FS
General Description
Built in stereo 6 input selectors and volume that there is
not an impedance change of a volume terminal. And this
is sound processor can realize 2-band equalizer
(Bass/Treble, Gain±14dB / 2dB_step) and BassBoost,
Output gain, Surround by external components.
Features
Equipped with 6 single ended stereo input
selectors
Built-in input gain controller suitable for mobile audio.
Volume input terminal can be used as a microphone
input terminal since its impedance remains constant
even if volume setting is changed.
Bi-CMOS process is suitable for the design of low
current and low energy. It also provides more quality
for Bi-CMOS small scale regulator and heat in a set.
The package of this IC is SSOP-A32. Sound input
terminals and output terminals arrangement is
optimized for easy and fast layout of PCB pattern. At
the same time, it minimizes PCB area.
Key Specification
Current upon no signal:
Total Harmonic Distortion:
Maximum Input Voltage:
Crosstalk between Selectors:
Volume Control Range:
Output Noise Voltage:
Residual Output Noise Voltage:
Operating Temperature Range:
Package
SSOP-A32
7mA(typ)
0.002%(typ)
2.4Vrms(typ)
100dB(typ)
0dB to -87dB
5µVrms(typ)
5µVrms(typ)
-40℃ to +85℃
W(typ) x D(typ) x H(max)
13.60mm x 7.80mm x 2.01mm
Applications
Suitable for mini-components or micro components.
Used for audio equipment of TV, DVD, etc.
SSOP-A32
Typical Application Circuit
Figure 1. Application Circuit Diagram
○Product structure：Silicon monolithic integrated circuit ○This product is not designed for protection against radioactive rays
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Datasheet
BD3491FS
Pin Configuration
B1
1
32
A1
B2
2
31
A2
C1
3
30
FIL
C2
4
29
GND
D1
5
28
SDA
D2
6
27
SCL
E1
7
26
VCC
E2
8
25
OUT1
F1
9
24
SB1
F2
10
23
SR
SEL2
11
22
SB2
SEL1
12
21
OUT2
VOL1
13
20
BCB1
VOL2
14
19
BCA1
TC2
15
18
BCA2
TC1
16
17
BCB2
Figure 2. Pin Configuration
Pin Descriptions
Terminal
Number
Terminal
Name
1
B1
Terminal
Number
Terminal
Name
Ch1 of B input terminal
17
BCB2
Ch2 of Bass filter terminal
Description
Description
2
B2
Ch2 of B input terminal
18
BCA2
Ch2 of Bass filter terminal
3
C1
Ch1 of C input terminal
19
BCA1
Ch1 of Bass filter terminal
4
C2
Ch2 of C input terminal
20
BCB1
Ch1 of Bass filter terminal
5
D1
Ch1 of D input terminal
21
OUT2
Ch2 of Output terminal
6
D2
Ch2 of D input terminal
22
SB2
7
E1
Ch1 of E input terminal
23
SR
Surround terminal
8
E2
Ch2 of E input terminal
24
SB1
Ch1 of Bass boost terminal
Ch2 of Bass boost terminal
9
F1
Ch1 of F input terminal
25
OUT1
Ch1 of Output terminal
10
F2
Ch2 of F input terminal
26
VCC
Power supply terminal
11
SEL2
Ch2 of selector output terminal
27
SCL
Serial communication clock terminal
12
SEL1
Ch1 of selector output terminal
28
SDA
Serial communication data terminal
13
VOL1
Ch1 of Volume input terminal
29
GND
GND terminal
14
VOL2
Ch2 of Volume input terminal
30
FIL
VCC/2 terminal
15
TC2
Ch2 of Treble filter terminal
31
A2
Ch2 of A input terminal
16
TC1
Ch1 of Treble filter terminal
32
A1
Ch1 of A input terminal
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Datasheet
BD3491FS
Block Diagram
Figure 3. Block Diagram
Absolute Maximum Ratings
Parameter
Symbol
Limits
Unit
Power supply Voltage
VCC
V
Input Voltage
Vin
Power Dissipation
Pd
10.0
VCC+0.3 to GND-0.3
SCL,SDA only 7 to GND-0.3
0.95 ※1
W
Storage Temperature
Tastg
-55 to +150
℃
V
※1 Derate by 7.6mW/℃ for Ta=25℃ or more.
ROHM standard board shall be mounted. Thermal resistance θja = 131.6(℃/W)。
ROHM standard board
Size:70×70×1.6(㎣)
Material: A FR4 grass epoxy board (3% or less of copper foil area)
Operating Range
Parameter
Symbol
Limits
Unit
Power supply voltage
VCC
4.75 to 9.5
V
Temperature
Topr
-40 to +85
℃
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Datasheet
BD3491FS
BLOCK
Electrical Characteristics
(Unless specified particularly, Ta=25℃, VCC=9.0V, f=1kHz, Vin=1Vrms, Rg=600Ω, RL=10kΩ, A input, Input gain 0dB,
Volume 0dB, Bass 0dB, Treble 0dB, Surround Mode OFF, Surround Gain = OFF)
Limit
Unit
Symbol
Typ.
Max.
Condition
IQ
－
7
15
mA
No signal
Voltage Gain
GV
-1.5
0
+1.5
dB
Gv=20log(Vout/Vin)
Channel Balance
CB
-1.5
0
+1.5
dB
CB = GV1-GV2
Total Harmonic Distortion
THD+N
－
0.002
0.1
％
Vout=1Vrms
BW=400-30kHz
Output Noise Voltage
VNO
－
5
20
µVrms
Rg = 0Ω
BW = IHF-A
Residual Output Noise Voltage
VNOR
－
5
20
µVrms
Rg = 0Ω
BW = IHF-A
Volume = -∞
Crosstalk between Channels
CTC
－
-100
-80
dB
Input Impedance
RIN
35
50
65
kΩ
Maximum Input Voltage
VIM
2.1
2.4
-
Vrms
Crosstalk between Selectors
CTS
－
-100
-84
dB
Rg = 0Ω
CTS=20log(Vout/Vin)
BW = IHF-A
Control Range
GV MAX
-90
-87
-84
dB
Vin=2Vrms
Gv=20log(Vout/Vin)
Maximum Attenuation
GV MIN
－
-100
-80
dB
Volume = -∞
Gv=20log(Vout/Vin)
Maximum Boost Gain
GB BST
11.5
14
16.5
dB
Gain = 14dB, f = 100Hz
Vin=100mVrms
Gv=20log(Vout/Vin)
Maximum Cut Gain
GB CUT
-16.5
-14
-11.5
dB
Gain = -14dB, f = 100Hz
Vin=2Vrms
Gv=20log(Vout/Vin)
Maximum Boost Gain
GT BST
11.5
14
16.5
dB
Gain = 14dB, f = 10kHz
Vin=100mVrms
Gv=20log(Vout/Vin)
Maximum Cut Gain
GT CUT
-16.5
-14
-11.5
dB
Gain = -14dB, f = 10kHz
Vin=2Vrms
Gv=20log(Vout/Vin)
TREBLE
BASS
GENERAL
Current upon no signal
INPUT SELECTOR
Min.
VOLUME
Item
Rg = 0Ω
CTC=20log(Vout2/Vout1)
BW = IHF-A
VIM at THD+N(Vout)=1％
BW=400-30kHz
※Phase between input / output is same.
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Datasheet
BD3491FS
Typical Performance Curves
5
8
4
7
3
6
2
Operating range
1
Gain [dB]
Iq [mA]
5
4
0
-1
3
-2
2
-3
1
-4
-5
0
0
2
4
6
8
10
10
100
1000
10000
100000
Frequency [Hz]
VCC [V]
Figure 4. Vcc vs. Iq
10.000
Figure 5. Gain vs. Frequency
10.000
22
20
18
1.000
1.000
16
10kHz
14
1 kHz
100Hz
0.100
Gain [dB]
0.100
Vo [Vrms]
THD+n [%]
12
10
8
6
0.010
4
0.010
2
0
0.001
0.001
0.010
0.100
1.000
-2
0.001
10.000
10
Figure 6. THD+N,Vo vs. Vin
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100
1000
10000
100000
Frequency [Hz]
Vin [Vrms]
Figure 7. Input Gain vs. Frequency.
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Datasheet
BD3491FS
5
-30
Measurement filter
= 30kHz_LPF
0
Measurement filter
= 30kHz_LPF
-40
-5
-50
-10
Volume setting = 0 to -40dB
Volume setting = -41 to -87dB
-60
Gain [dB]
Gain [dB]
-15
-20
-70
-25
-80
-30
-90
-35
Volume setting = -∞
-100
-40
-45
10
-110
100
1000
10000
100000
10
100
Frequency [Hz]
1000
10000
100000
Frequency [Hz]
Figure 9. Volume Attenuation 2
Figure 8. Volume Attenuation 1
16
16
180
High
High
14
12
14
135
12
90
8
Gain [dB]
Gain [dB]
Middle
6
10
45
8
0
6
-45
Low
Low
4
Phase [° ]
Middle
10
Gain
4
-90
2
2
0
Phase
Off
0
-2
10
100
1000
10000
100000
100
1000
10000
-180
100000
F requency [Hz]
F requency [Hz]
Figure 10. Output Gain vs. Frequency
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-135
Figure 11. BassBoost & Surround
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Datasheet
BD3491FS
CONTROL SIGNAL SPECIFICATION
(1) Electrical specifications and timing for bus lines and I/O stages
SDA
t
BUF
t
t
t
t
t
HD;STA
F
SP
R
LOW
SCL
t
HD;STA
P
t
HD;DAT
t
t
SU;DAT
HIGH
t
t
SU;STA
SU;STO
T
Sr
S
P
2
Figure 12. Definition of timing on the I C-BUS
2
Table 1. Characteristics of the SDA and SCL bus lines for I C-BUS devices
Parameter
Fast-mode
Symbol
Min.
Max.
Unit
1
SCL clock frequency
fSCL
0
400
2
tBUF
1.3
－
µs
tHD;STA
0.6
－
µs
4
Bus free time between a STOP and START condition
Hold time (repeated) START condition. After this period, the first clock
pulse is generated
LOW period of the SCL clock
µs
5
HIGH period of the SCL clock
6
3
kHz
tLOW
1.3
－
tHIGH
0.6
－
Set-up time for a repeated START condition
tSU;STA
0.6
－
µs
7
Data hold time
tHD;DAT
300*
－
ns
8
Data set-up time
tSU;DAT
300*
－
ns
9
Set-up time for STOP condition
tSU;STO
0.6
－
µs
µs
All values referred to VIH min and VIL max levels (see Table 2).
*About 7(tHD;DAT), 8(tSU;DAT), make it the setup which a margin is fully in .
2
Table 2. Characteristics of the SDA and SCL I/O stages for I C-BUS devices
Parameter
Symbol
Fast-mode
Min.
Max.
1
Unit
10
LOW level input voltage:
VIL
-0.3
11
HIGH level input voltage:
VIH
2.3
5
V
12
Pulse width of spikes which must be suppressed by the input filter.
tSP
0
50
ns
VOL1
0
0.4
V
Ii
-10
10
µA
13
14
LOW level output voltage (open drain or open collector): at 3mA sink
current.
Input current in each I/O pin with an input voltage between 0.4V and
4.5V.
V
SCL clock frequency:250kHz
2
Figure 13. A command timing example in the I C data transmission.
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Datasheet
BD3491FS
2
(2) I C-BUS FORMAT
S
1bit
MSB
LSB
Slave Address
8bit
S
Slave Address
A
Select Address
Data
P
MSB
LSB
MSB
LSB
A
Select Address
A
Data
A
P
1bit
8bit
1bit
8bit
1bit 1bit
= Start conditions (Recognition of start bit)
= Recognition of slave address. 7 bits in upper order are voluntary.
The least significant bit is “L” due to writing.
= ACKNOWLEDGE bit (Recognition of acknowledgement)
= Select every of volume, bass and treble.
= Data on every volume and tone.
= Stop condition (Recognition of stop bit)
2
(3) I C-BUS Interface Protocol
1) Basic form
Slave Address
A
Select Address
A
Data
A
S
MSB
LSB
MSB
LSB
MSB LSB
P
2) Automatic increment (Assigned select Address is increased according to the number of data.)
S
Slave Address
A
Select Address
A
Data1
A
Data2
A ････
DataN
A P
MSB
LSB
MSB
LSB
MSB LSB
MSB
LSB
MSB LSB
No.1. Data1 is set as data of address specified by Select Address.
No.2. Data2 is set as data of next address from the address specified by No.1.
No.3. DataN is set as data of address incremented N-1 times from the address specified by No.1.
Circulation of Select Address by the automatic increment function is shown below.
→04→06→21→22→51→57→78
3) Configuration unavailable for transmission (In this case, only Select Address1 is set properly.)
S
Slave Address A
Select Address1
A Data A Select Address 2 A Data A P
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.
(4) Slave Address
MSB
LSB
A6
A5
A4
A3
A2
A1
A0
R/W
1
0
0
0
0
0
1
0
82H
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Datasheet
BD3491FS
(5) Select Address & Data
Select
Address
(hex)
MSB
D7
D6
D5
D4
D3
Input Selector
04
0
0
0
0
0
Input Gain
06
0
0
0
Volume Gain 1ch
21
1
Volume Attenuation 1ch
Volume Gain 2ch
22
1
Volume Attenuation 2ch
Bass Gain
51
Bass
Boost/Cut
0
0
0
Bass Gain
0
Treble Gain
57
Treble
Boost/Cut
0
0
0
Treble Gain
0
Surround
78
Surround
Mode
0
0
0
Test Mode
F0
0
0
0
0
0
0
0
0
System Reset
FE
1
0
0
0
0
0
0
1
Items
Data
LSB
D2
D1
D0
Input Selector
Input Gain
0
Surround Gain
About the register that a function isn't assigned(above table, D0～D7 is "0" or "1"), set it up as the value of the above table.
Note:
Upon continuous data transfer, the Select Address is circulated by the automatic increment function, as shown below.
→04→06→21→22→51→57→78
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Datasheet
BD3491FS
Select Address 04 (hex)
Mode
MSB
D7
Input Selector
D6
D5
D4
D3
A
B
C
D
0
0
0
0
0
E
F
INPUT SHORT
INPUT MUTE
INPUT MUTE : Mute is done at the input signal in the part of Input Selector.
LSB
D2
D1
D0
0
0
0
0
0
0
1
1
1
1
0
1
1
0
1
0
1
1
0
1
0
0
1
1
Select Address 06 (hex)
Input Gain
D4
D3
D2
0dB
0
0
0
2dB
0
0
0
4dB
0
0
1
6dB
0
0
1
8dB
0
1
0
12dB
0
1
1
16dB
1
0
0
20dB
1
0
1
0
0
0
0
1
0
0
1
1
1
0
0
1
0
1
Prohibition
1
1
0
1
1
0
1
1
1
1
1
1
About Input Gain, the allotment of D4/D3/D2/D1 is discontinuous, please be careful.
Gain
MSB
D7
D6
D5
D1
0
1
0
1
0
0
0
0
1
1
1
1
0
1
0
1
LSB
D0
0
: Initial condition
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Datasheet
BD3491FS
Select Address 21, 22 (hex)
MSB
Attenuation
D7
D1
LSB
D0
0dB
0
0
0
0
0
0
0
-1dB
0
0
0
0
0
0
1
-2dB
0
0
0
0
0
1
0
-3dB
0
0
0
0
0
1
1
-4dB
0
0
0
0
1
0
0
-5dB
0
0
0
0
1
0
1
-6dB
0
0
0
0
1
1
0
-7dB
0
0
0
0
1
1
1
-8dB
0
0
0
1
0
0
0
-9dB
0
0
0
1
0
0
1
D6
Volume Attenuation
D5
D4
D3
D2
-10dB
0
0
0
1
0
1
0
-11dB
0
0
0
1
0
1
1
-12dB
0
0
0
1
1
0
0
-13dB
0
0
0
1
1
0
1
-14dB
0
0
0
1
1
1
0
-15dB
0
0
0
1
1
1
1
0
0
1
0
0
0
0
-17dB
0
0
1
0
0
0
1
-18dB
0
0
1
0
0
1
0
-19dB
0
0
1
0
0
1
1
-20dB
0
0
1
0
1
0
0
-21dB
0
0
1
0
1
0
1
-22dB
・
・
・
-83dB
0
・
・
・
1
0
・
・
・
0
1
・
・
・
1
0
・
・
・
0
1
・
・
・
0
1
・
・
・
1
0
・
・
・
1
-84dB
1
0
1
0
1
0
0
-85dB
1
0
1
0
1
0
1
-86dB
1
0
1
0
1
1
0
-87dB
1
0
1
0
1
1
1
Prohibition
1
・
・
1
0
・
・
1
1
・
・
1
1
・
・
1
0
・
・
1
0
・
・
1
0
・
・
0
-∞dB
1
1
1
1
1
1
1
-16dB
1
: Initial condition
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Datasheet
BD3491FS
Select Address 51(hex)
Gain
MSB
Bass Gain
D2
D1
0dB
0
0
0
2dB
0
0
1
4dB
0
1
0
0
1
1
1
0
0
10dB
1
0
1
12dB
1
1
0
14dB
1
1
1
8dB
Mode
Bass
Boost
/Cut
D6
0
MSB
D7
Boost
0
Cut
1
D5
D4
LSB
D3
6dB
D7
0
0
Bass Boost/Cut
D6
D5
D4
0
0
0
D3
D0
0
LSB
D2
D1
Bass Gain
D0
0
Select Address 57(hex)
Gain
MSB
D7
Treble Gain
D6
D5
D4
LSB
D3
D2
D1
0dB
0
0
0
2dB
0
0
1
0
1
0
0
1
1
1
0
0
10dB
1
0
1
12dB
1
1
0
14dB
1
1
1
4dB
6dB
8dB
Mode
Treble
Boost
/Cut
0
MSB
D7
Boost
0
Cut
1
0
0
Treble Boost/Cut
D6
D5
D4
0
0
0
D3
D2
Treble Gain
D0
0
LSB
D1
D0
0
: Initial condition
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Datasheet
BD3491FS
Select Address 78(hex)
Gain
MSB
D7
Surround Gain
D2
D1
D0
OFF
0
0
0
0
Low
0
1
0
1
Middle
1
0
1
0
High
1
1
1
1
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
0
D5
0
D4
LSB
D3
Surround
Mode
D6
0
Prohibition
About Surround Gain, the allotment of D3/D2/D1/D0 is discontinuous, please be careful.
Mode
MSB
D7
Surround Mode
D6
D5
D4
0
0
0
D3
LSB
D2
D1
D0
Mode OFF
Surround SW
(A)=ON
Mode ON
0
Surround Gain
1
Surround SW
(B)=ON
About Surround SW, please refer to Figure 22,25,28,30,32,36 (From P22 to P27).
: Initial condition
(6) About initial condition at supply voltage on
At on of supply voltage circuit made initialization inside IC is built-in. Please send data to all address as
initial data at supply voltage on. And please supply mute at set side until this initial data is sent.
Limit
Item
Symbol
Rise time of VCC
VCC voltage of release
power on reset
Unit
Min.
Typ.
Max.
Trise
20
－
－
usec
Vpor
－
3.0
－
V
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TSZ02201-0C2C0E155560-1-2
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Datasheet
BD3491FS
Volume Attenuation
ATT(dB)
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
-11
-12
-13
-14
-15
-16
-17
-18
-19
-20
-21
-22
-23
-24
-25
-26
-27
-28
-29
-30
-31
-32
-33
-34
-35
-36
-37
-38
-39
-40
-41
-42
-43
-44
-45
D7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
ATT(dB)
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
-46
-47
-48
-49
-50
-51
-52
-53
-54
-55
-56
-57
-58
-59
-60
-61
-62
-63
-64
-65
-66
-67
-68
-69
-70
-71
-72
-73
-74
-75
-76
-77
-78
-79
-80
-81
-82
-83
-84
-85
-86
-87
Prohibition
-∞
D7
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
・
1
1
D6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
・
1
1
D5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
・
1
1
D4
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
・
1
1
D3
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
・
1
1
D2
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
・
1
1
D1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
・
1
1
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
・
0
1
: Initial condition
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Datasheet
BD3491FS
Application Circuit Diagram
Figure 14. Application Circuit Diagram
UNIT
RESISTANCE: Ω
CAPACITANCE: F
Notes on Wiring
①Decoupling capacitor of the power supply has to be connected in the shortest distance possible.
②GND lines has to follow star-point connection.
③Wiring pattern of Digital signal should be away from that of analog unit. At the same time, crosstalk has to be minimized
, if not eliminated.
④If possible, SCL and SDA lines of I2C-BUS should not be parallel.
If it cannot be avoided, the lines must, at least, be shielded.
⑤Analog input lines should not be parallel, as well. If it cannot be avoided, the lines must, at least, be shielded.
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Datasheet
BD3491FS
Thermal Derating Curve
The temperature, at which it is used, affects the electrical characteristics of an IC. Exceeding absolute maximum ratings may
degrade and destroy elements. Careful consideration must be given to the heat of the IC from the two standpoints of immediate
damage and long-term reliability of operation.
Reference data
SSOP-A32
1.5
Measurement condition: ROHM Standard board
Board Size：70×70×1.6(㎣)
material：A FR4 grass epoxy board
(3% or less of copper foil area)
Power Dissipation Pd (W)
0.95W
1.0
θja = 131.6℃/W
0.5
0.0
0
25
50
75
85
100
125
150
Ambient Temperature Ta(℃)
Figure 15. Temperature Derating Curve
Note: Values are actual measurements and are not guaranteed.
Power dissipation values vary according to the board on which the IC is mounted.
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Datasheet
BD3491FS
Pin Equivalent Circuit and Description
Pin
Pin
Pin
No.
Name
Voltage
32
A1
31
A2
1
B1
2
B2
3
C1
4
C2
5
D1
6
D2
7
E1
8
E2
9
F1
10
F2
11
SEL2
12
SEL1
21
OUT2
25
OUT1
4.5V
Equivalent Circuit
Pin Description
Stereo signal input pin
Input impedance = 50kΩ(typ)
VCC
50KΩ
GND
4.5V
Output pin
VCC
GND
13
VOL1
14
VOL2
4.5V
Volume input pin
Input impedance = 50kΩ(typ)
VCC
Total
50KΩ
GND
15
TC2
16
TC1
17
BCB2
20
BCB1
4.5V
TC1,TC2 : Treble filter pin
Refer to P21, Figure 20, Table 4 for the
input impedance.
VCC
BCB1,BCB2 : Bass filter pin
Refer to P20, Figure 18, Table 3 for the
input impedance
GND
18
BCA2
19
BCA1
4.5V
Bass filter pin
VCC
GND
26
VCC
Power supply pin.
9.0V
The figure in the pin description, pin voltage and input/output equivalent circuit is reference value only. It does not guarantee the value.
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Datasheet
BD3491FS
Pin
No.
Pin
name
Pin
voltage
22
SB2
4.5V
24
SB1
Equivalent Circuit
Pin Description
Bass boost pin.
Refer to P22, Figure 22, Table 5 for the
input impedance.
VCC
GND
23
SR
4.5V
Surround pin
Refer to P22, Figure 22, Table 5 for the
input impedance.
VCC
GND
27
SCL
－
Clock input pin of
2
I C-BUS communication.
VCC
1.65V
GND
28
SDA
－
Data input pin of
2
I C-BUS communication.
VCC
1.65V
GND
29
GND
30
FIL
Analog ground pin.
0V
4.5V
1/2 VCC pin.
Reference voltage of analog signal
system.
The simple pre-charge circuit and simple
discharge circuit for an external capacitor
are built-in.
VCC
50KΩ
50KΩ
GND
The figure in the pin description, pin voltage and input/output equivalent circuit is reference value only. It does not guarantee the value.
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Datasheet
BD3491FS
Cautions on use
1. Absolute Maximum Voltage Rating
When the voltage supplied to VCC is more than the absolute maximum voltage rating, circuit current increases
rapidly. This will lead to characteristic deterioration and destruction of the device. Especially in a surge test of the set,
when surge application is expected at VCC terminal (26pin), absolute maximum voltage rating must not be exceeded
(including a operating voltage + serge ingredient (around 14V)).
2. Input Signal
a) About constant set up of input coupling capacitor
In the signal input terminal, the constant setting of input coupling capacitor C(F) be sufficient input impedance
st
RIN(Ω) inside IC and please decide. The 1 order HPF characteristic of RC is composed.
G[dB]
C[F]
0
RIN
A (f)
[Ω]
SSH
F[Hz]
INPUT
A(f) =
2
(2πfCR
IN )
1 + (2πfCR
2
IN)
Figure 16. Input Short Circuit
b) Input Selector SHORT
SHORT mode is the command which makes input impedance of all terminals in input selector small by setting
switch SSH is ON. Switch SSH is OFF, when SHORT command is disabled.
The charge time of an external coupling capacitor becomes short during the command.
It is recommended to use SHORT mode when there is no signal.
3. Output Load Characteristics
The usages of load for output are below (reference). Please use the load more than 10kΩ(TYP)
Pin No.
Pin Name
Pin No.
Pin Name
11
SEL2
21
OUT2
12
SEL1
25
OUT1
VCC=9.0V
THD+n=1%
BW=400to30kHz
Figure 17. Output Load Characteristic (Reference Vcc=9.0V)
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Datasheet
BD3491FS
4. Sound Input Terminal
If this terminal is open, the input resistance is 50kΩ which may induce pop noise from the outside. If a sound input
terminal is not used, it has to be connected to GND using a capacitor or set up the input selector using a
microcomputer so that the unused input terminal will not be selected.
5. Bass Filter Constant Set Up
Bass Boost
Bass Cut
IN
IN
OUT
R2
R3
OUT
R2
BCB1 (20in)
BCB2 (17pin)
BCA1 (19pin)
BCA2 (18pin)
C1
R3
BCB1 (20in)
BCB2 (17pin)
BCA1 (19pin)
BCA2 (18pin)
C2
R1
C1
C2
R1
Figure 18. Bass Filter
fo =
1
[Hz]
2π R1(R2 + R3)･C1･C2
Q=
R1(R2 + R3)･C1･C2
R1(C1 + C2) + R2C1
R2 + R3 C2
+
+1
C1 [dB]
BOOST GAIN = 20log R1
R2 C2
+
+1
R1 C1
R2 C2
+
+1
CUT GAIN = 20log R1 C1
[dB]
R2 + R3 C2
+
+1
R1
C1
Table 3.
Standard value of R2 and R3
Gain (dB)
Resistance(kΩ)
※TYP.
Bass
Boost/Cut Gain
Boost
R2
R3
±0dB
53.5
0
±2dB
40.9
12.6
±4dB
30.5
23.0
±6dB
22.3
31.2
±8dB
15.8
37.7
±10dB
10.6
42.9
±12dB
6.5
47.0
±14dB
3.2
50.3
fo
f(Hz)
Cut
Figure 19. Bass Frequency Characteristics
Actual boost/cut value may vary slightly .
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Datasheet
BD3491FS
6. Treble Filter Constant Set Up
Treble Boost
Treble Cut
IN
IN
OUT
R1
R1
R2
OUT
TC1(16pin)
TC2(15pin)
R2
TC1(16pin)
TC2(15pin)
C
C
Figure 20. Treble Filter
fc =
1
[Hz]
2πR2･C
BOOST GAIN = 20log
ZC =
R1 + R2 + ZC
[dB]
R2 + ZC
CUT GAIN = 20log
R2 + ZC
[dB]
R1 + R2 + ZC
1
[Ω]
jωC
Table 4.
Standard value of R1 and R2(reference)
Gain(dB)
Treble
3dB
Resistance(kΩ)
※TYP.
Boost/Cut Gain
R1
R2
±0dB
0
29.1
±2dB
6.1
23.0
±4dB
10.9
18.2
±6dB
14.8
14.3
±8dB
17.9
11.2
±10dB
20.5
8.6
±12dB
22.6
6.5
±14dB
24.4
4.7
Boost
ｆc
f(Hz)
Cut
3dB
Figure 21. Treble Frequency Characteristics
Actual boost/cut value may vary slightly
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Datasheet
BD3491FS
7. BassBoost Application
7-1. BassBoost Application Circuit
OUT1
OUT2
RB
C1
5.6k
C2
0.22µF
0.1µF
4.7µF
0.1µF
24
25
Table 5.
Standard value of R1 and R2
Surround
R1[kΩ]
R2[kΩ]
Gain
RB
5.6k
C2
23
4.7µF
C1
0.22µF
22
21
1.4k
R1
R2
2.4k
34.1k
(B)
R2
R1
(A)
OFF
0
84.5
Low
44.8
39.7
Middle
70.0
14.5
High
84.2
0.3
Surround SW : (A)=ON
Figure 22. Example of a BassBoost Application Circuit
7-2. The computation formula and the BassBoost Gain Characteristic Curve (fo=50Hz, Q=1.8(Surround Gain=High))
20
R1 + R2 C1
+
+1
C2
[dB ]
Gain = 20log R B
R2 C 1
+
+1
RB C 2
fo =
1
2π R B (R 1 + R 2 ) ⋅ C 1 ⋅ C 2
High
15
Gain [dB]
Middle
10
Low
[Hz ]
5
OFF
0
10
R B (R 1 + R 2 ) ⋅ C 1 ⋅ C 2
Q=
R B (C 1 + C 2 ) + R 2 ⋅ C 2
100
1k
10k
100k
Frequency [Hz]
Figure 23. BassBoost Gain Characteristic Curve
20
①
④
②
15
Gain [dB]
③
7-3. The Characteristic Curve in fixed number change
Table 6. The fixed number example
No.
①
②
③
④
(*1)
The specification
fo=60Hz,Q=1.8,Gain=16.8dB
fo=72Hz,Q=1.7,Gain=15.0dB
fo=79Hz,Q=1.9,Gain=16.2dB
fo=89Hz,Q=1.8,Gain=16.9dB
C1
[µF]
0.15
0.15
0.15
0.1
C2
[µF]
0.1
0.068
0.068
0.068
RB
[kΩ]
5.6
5.6
4.7
5.6
10
5
0
10
100
1k
Frequency [Hz]
(*1): Surround Gain=High
Figure 24. BassBoost Gain Characteristic Curve in
fixed number change
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Datasheet
BD3491FS
8. BassBoost & Surround Application
8-1. BassBoost & Surround Application Circuit
In this application circuit example, it isn't possible to do the use only of Surround. Also, Surround Gain depends on
the setting value of BassBoost Gain.
OUT2
OUT1
4.7µF
C1
0.22µ
RB
3.3k
C2
0.1µ 12k
25
RS
CSUR
RS
0.022µ
24
23
RB
3.3k
C2
12k 0.1µ
4.7µF
C1
0.22µ
22
Refer to Table 5 for R1 and R2
standard values.
21
1.4k
R1
2.4k
R2
34.1k
(B)
R2
R1
(A)
Surround SW : (B)=ON
Figure 25. Example of BassBoost & Surround Application Circuit
8-2. BassBoost & Surround Characteristic Curve and the computation formula of BassBoost Gain(Surround SW : (A)=ON)
R1 + R2 + RS C 1
+
+1
RB
C2
Gain = 20log
[dB ]
R2 + RS C1
+
+1
RB
C2
15
High
Middle
Gain [dB]
10
1
[Hz ]
fo =
2π R B (R 1 + R 2 + R S ) ⋅ C 1 ⋅ C 2
Low
5
OFF
0
R B (R 1 + R 2 + R S ) ⋅ C 1 ⋅ C 2
Q=
R B (C 1 + C 2 ) + C 2 (R 2 + R S )
10
100
1k
10k
100k
Frequency [Hz]
Figure 26. BassBoost & Surround Characteristic Curve(Surround SW : (A)=ON)
8-3. BassBoost & Surround Characteristic Curve(Surround SW : (B)=ON)
In this application circuit example, it isn't possible to do the use only of Surround. Also, Surround Gain depends on
the setting value of BassBoost Gain.
15
High
Middle
Gain [dB]
10
Low
5
OFF
0
10
100
1k
10k
100k
Frequency [Hz]
Figure 27. BassBoost & Surround Characteristic Curve(Surround SW : (B)=ON)
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9.Easy Surround Application
9. Easy Surround Application Circuit
Refer to Table 5 for R1 and R2
standard values.
OUT1
OUT2
15
4.7µF
4.7µF
High
10
24
23
22
Gain [dB]
OPEN
25
21
Middle
1.4k
Low
5
R1
R2
2.4k
34.1k
(B)
R2
R1
OFF
(A)
Surround SW : (A)=ON
0
10
100
1k
10k
100k
Frequency [Hz]
Figure 28. Example of Easy Surround
Application Circuit
Figure 29. Easy Surround Characteristic Curve
10. Surround Application
10-1. Surround Application Circuit
OUT1
OUT2
C SUR
0.0047µF
R SUR
22k
4.7µF
25
24
4.7µF
23
22
Refer to Table 5 for R1 and R2
standard values.
21
1.4k
R1
R2
2.4k
34.1k
(B)
R2
R1
(A)
Surround SW : (A)=ON
Figure 30. Example of Surround Application Circuit
10-2. Surround Characteristic Curve
15
High
10
Gain [dB]
Middle
Low
5
OFF
0
10
100
1k
10k
100k
Frequency [Hz]
Figure 31. Surround Characteristic Curve
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11. Output Gain Application
11-1. Output Gain Application Circuit
OUT1
OUT2
1µF
4.7µF
1µF
4.7µF
R OUT
25
18k
18k
R OUT
24
23
22
21
1.4k
R1
R2
2.4k
R2
34.1k
(B)
R1
Refer to Table 5 for R1 and R2
standard values.
(A)
Surround SW : (A)=ON
Figure 32. Example of Output Gain Application Circuit
11-2. The computation formula and the Output Gain Characteristic Curve
Gain = 20log
R 1 + R 2 + R OUT
[dB ]
R 2 + R OUT
20
High
Gain [dB]
15
Middle
10
Low
5
OFF
0
10
100
1k
10k
100k
Frequency [Hz]
Figure 33.
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BD3491FS
12. Easy 3 Band Application
12-1. Easy 3 Band Application Circuit
・Easy 3 band is formed using BassBoost, Bass and Treble.
・Use BassBoost for Bass band, Bass for Middle band and Treble for Treble band.
・The Middle band and Treble band Gain ranges from -14dB to 14dB with 2dB step while Bass band have four
Gain settings (OFF/Low/Middle/High).
・At the addition function unused time, it is Surround Gain=OFF, Surround SW : Use in (A)=ON.
・Surround SW : Be careful because it damages output (25pin, 21pin) short-circuiting next, a characteristic
when having made (B)=ON.
Figure 34. Example of Easy 3 band Application Circuit
6-2. Easy 3 Band Characteristic Curve
15
10
Gain [dB]
5
0
-5
-10
-15
10
100
1k
Frequency [Hz]
10k
100k
Figure 35. Easy 3 Band Characteristic Curve
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13.
Application Circuit example when added function is not used
・When the added function is unused, Surround Gain=OFF, Surround SW : (A)=ON.
・Surround SW : Caution must be taken when set to (B)=ON. In this condition, the outputs are shorted(25pin, 21pin)
and will degrade the electrical characteristics of the chip.
OUT1
OUT2
4.7µF
4.7µF
25
24
23
22
21
Refer to Table 5 for R1 and R2
standard values.
1.4k
R1
R2
2.4k
34.1k
(B)
R2
R1
(A)
Surround SW : (A)=ON
Figure 36. Example of addition function unused time Application Circuit
14. INPUT SHORT Function Application Circuit
・The INPUT SHORT function makes input impedance RIN small in the switch control and
causes fast charging in the external coupling capacitance.
・The input terminal DC bias voltage can be changed to its regular condition (1/2VCC) by
2
enabling this function (I C-BUS setting : Select Address=04(hex),Data=05(hex)) immediately
after start-up.
・INPUT SHORT function has to be used whenever there is no input at the input terminals.
Input Selector
BIAS
A1
B1
3
C1
50k
Charge
1
50k
Charge
32
50k
Charge
Charge
50k
5
D1
Figure 37. INPUT SHORT mode in Ch1
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15. Microphone Input Application
・Outside sound signal can be added to VOL1(13pin) and VOL2(14pin) since its input impedance is constant (50kΩ).
Even if the volume attenuation setting changes, it can still be used as the microphone input terminal.
・Due to the added resistor at VOL1 and VOL2 terminal, the signal level of this terminals (VOL1, VOL2) is
determined by its resistance value and acts as signal level VOLUME.
VOLUME
Zin
SEL2
SEL1
11
Zin
VOL1
12
VOL2
13
14
*Zin=50kΩ(typ) constant
*Make R2 larger than the output-impedance of
the outside sound signal.
* However as R1 and R2 increases, output
noise voltage becomes worst.
R1
R1
2.2µ
VOLUME
2.2µ
R2
R2
2.2µ
2.2µ
External Input
Figure 38. Example of microphone input Application Circuit
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BD3491FS
Ordering Information
B
D
3
4
9
F
1
S
E2
Package
FS: SSOP-A32
Part Number
Packaging and forming specification
E2: Embossed tape and reel
(SSOP-A32)
Physical Dimension: Tape and Reel Information
SSOP-A32
<Tape and Reel information>
13.6 ±0.2
(MAX 13.95 include BURR)
17
Tape
Embossed carrier tape
Quantity
2000pcs
Direction
of feed
0.3MIN
5.4±0.2
7.8±0.3
32
1
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
)
16
0.11
1.8±0.1
0.15 ±0.1
0.36 ±0.1
0.1
0.8
1pin
(Unit : mm)
Reel
∗
Direction of feed
Order quantity needs to be multiple of the minimum quantity.
Marking Diagram(TOP VIEW)
SSOP-A32(TOP VIEW)
Part Number Marking
BD3491FS
LOT Number
1PIN MARK
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Revision history
Date
Revision
08.FEB.2013
001
Changes
New Release
Date
Revision
5.Dec.2013
002
All page, format update
Changes
5.Dec.2013
002
Minor correction
Date
Revision
28.FEB.2014
003
Correct figure,
Changes
28.FEB.2014
003
Correct CONTROL SIGNAL SPECIFICATION,
28.FEB.2014
003
Correct Thermal resistance and Power Dissipation.
28.FEB.2014
003
Minor correction
Application Circuit Diagram, Pin Configuration , Block Diagram.
Date
Revision
1.APR.2014
004
Comment about Prohibition in I C-data add.
1.APR.2014
004
Minor correction
Slave address, initial condition.
Changes
2
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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
(Note 1)
, transport
intend to use our Products in devices requiring extremely high reliability (such as medical equipment
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
CLASSⅡb
CLASSⅢ
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
Notice – GE
© 2013 ROHM Co., Ltd. All rights reserved.
Rev.002
Datasheet
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.
Precaution for Disposition
When disposing Products please dispose them properly using an authorized industry waste company.
Precaution for Foreign Exchange and Foreign Trade act
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.
Precaution Regarding Intellectual Property Rights
1.
All information and data including but not limited to application example contained in this document is for reference
only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any
other rights of any third party regarding such information or data. ROHM shall not be in any way responsible or liable
for infringement of any intellectual property rights or other damages arising from use of such information or data.:
2.
No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any
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.
Notice – GE
© 2013 ROHM Co., Ltd. All rights reserved.
Rev.002
Datasheet
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.
Notice – WE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.001