BD3812F
Audio ICs
2 channel Volume IC
BD3812F
BD3812F is a sound processor IC that has features of volume, and gain amplifier required for AV receiver and
mini-component stereo. Up to 4 chips can be used with common bus line by chip select pin.
zExternal dimensions (Unit : mm)
zApplications
AV receiver and mini stereo set.
1.5±0.1
1
7
0.3Min.
8
4.4±0.2
0.11
zFeatures
1) Volume residual noise : 1.2µ Vrms {Dynamic range : 131dB (IHF-A)}
2) Volume is 2ch-independence. (0 to -103dB, MUTE 1dB / step)
3) BUS is common and be possible to maximum 8channnel-ization of
6ch-Volume IC.
4) It can be controlled until 4 chips with common bus line at the same time.
5) Maximum output voltage : 4.2Vrms (Vcc=7V, VEE=−7V, RL=10kΩ)
6) The serial data control of 2-wire type. (correspond to 3.3V and 5V)
7) Built-in the convenient output gain amp.(0, 6 to 18dB, 2dB / step) for the
adjustment of the output signal.
8) Output mute be able to serial data and external mute terminal both.
6.2±0.3
8.7±0.2
14
0.15±0.1
0.1
1.27
0.4±0.1
SOP14
zAbsolute maximum ratings (Ta=25°C)
Parameter
Impressed voltage
Input voltage
Power dissipation
Symbol
Limits
VCC−VEE
15
Unit
V
VIN
VCC+0.3 to VEE−0.3
Pd
450
−20 to +75
Operating temperature
Topr
Storage temperature
Tastg
∗
V
mW
˚C
˚C
−55 to +125
+
+
∗ This value decreases 4.5mW/ ˚C for Ta=25˚C or more.
A standard board,70 70 1.6mm, shall be mounted.
zOperating voltage range (Ta=25°C)
Symbol
Min.
Typ.
Max.
Unit
Power supply (Positive)
VCC−GND
5
−
7.3
V
Power supply (Negative)
VEE−GND
−5
−
−7.3
V
Parameter
Rev.A
1/2
BD3812F
Audio ICs
zElectrical Characteristics (Unless otherwise noted, Ta=25°C, VCC=7V, VEE=-7V, f=1kHz, VIN=1Vrms,
RL=10kΩ, Rg=600Ω, Master volume=0dB, Output gain=0dB)
Parameter
7pin
Circuit current
5pin
Output voltage gain
Total harmonic distortion ratio
Maximum output voltage
Conditions
Symbol
Min.
Typ.
Max.
Unit
IQ
−
2
6
mA
No signal
Measure : Pin13, 14
GV
−2
0
+2
dB
THD
−
0.005
0.09
%
Vomax
3.4
4.2
−
Vrms
Measure : Pin13, 14, THD=1%
Measure : Pin13, 14, Rg=0Ω, BW=ΙHF−A
Measure : Pin13, 14, BW=400∼30kHz
Output noise voltage
Vno
−
1.2
5
µVrms
Input impedance
Rin
20
30
40
kΩ
Cross-talk between channels
CTC
−
−100
−70
dB
Volume control range
Maximum attenuation
GVR
Vmin
−106
−
−103
−118
−100
−105
dB
dB
Measure : Pin1, 3
Measure : Pin13(OUT2), Rg=0Ω, BW=IHF−A,
Reference : Pin14(OUT1)=1Vrms
Measure : Pin13, 14, VIN=3Vrms
BW=IHF−A, Measure : Pin13, 14, VIN=3Vrms
Output gain control range
GOG
16
18
20
dB
Measure : Pin13, 14, VIN=0.4Vrms
zApplication circuit diagram
+
10µ
IN 1
1
2
+
AGND
IN 2
OUT1
13
OUT2
12
SEL
+
4
AGND
VEE
−
3
10µ
−
11
5
+
+
DGND
10
MUTE
9
DA
8
CL
47µ
6
AGND
VCC
14
+
LOGIC
47µ
7
BD3812F
UNIT
CAPACITOR : F
Rev.A
2/2
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
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otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.1