Harman Kardon AVR 171S (serv.man4) Service Manual ▷ View online
Product Specification
Spec-BM840-V1.1 Page 5 of 7 www.sunitec.com.tw
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Recommended Layout patterns:
Harman Kardon
AVR 171 Service Manual
Page 113 of 174
BD3812F
Audio ICs
Rev.A
1/2
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.
zApplications zExternal dimensions (Unit : mm)
SOP14
1
14
8.7±0.2
7
8
4.4±
0.2
6.2±
0.3
0.4±0.1
0.11
1.5±
0.1
0.15±0.1
0.3Min.
1.27
0.1
AV receiver and mini stereo set.
z
z
zFeatures
1) Volume residual noise : 1.2
1) Volume residual noise : 1.2
P 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
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, V
EE
=
−7V, RL=10k
:)
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
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.
zAbsolute maximum ratings (Ta=25
zAbsolute maximum ratings (Ta=25
qC)
Impressed voltage
Power dissipation
Operating temperature
Storage temperature
Operating temperature
Storage temperature
Parameter
Unit
∗ This value decreases 4.5mW/ ˚C for Ta=25˚C or more.
A standard board,70 70 1.6mm, shall be mounted.
mW
˚C
˚C
˚C
V
Input voltage
Symbol
V
CC
−V
EE
Pd
Topr
Tastg
V
IN
Limits
15
450
−20 to
+
75
−55 to
+
125
V
CC
+0.3 to V
EE
−0.3
V
∗
+ +
z
zOperating voltage range (Ta=25
qC)
Power supply (Positive)
V
Power supply (Negative)
V
Parameter
5
−5
Min.
7.3
−7.3
Max.
Unit
−
−
−
Typ.
V
CC
−GND
V
EE
−GND
Symbol
Harman Kardon
AVR 171 Service Manual
Page 114 of 174
BD3812F
Audio ICs
Rev.A
2/2
zElectrical Characteristics (Unless otherwise noted, Ta=25
qC, V
CC
=7V, V
EE
=-7V, f=1kHz, V
IN
=1Vrms,
RL=10k
:Rg=600:Master volume=0dB, Output gain=0dB)
7pin
5pin
No signal
Circuit current
Measure : Pin13, 14
Output voltage gain
Measure : Pin13, 14, BW
=400∼30kHz
Total harmonic distortion ratio
Measure : Pin13, 14, THD
=1%
Maximum output voltage
Measure : Pin13, 14, Rg
=0Ω, BW=ΙHF−A
Output noise voltage
Measure : Pin1, 3
Input impedance
Measure : Pin13(OUT2), Rg
=0Ω, BW=IHF−A,
Reference : Pin14(OUT1)
=1Vrms
Cross-talk between channels
Measure : Pin13, 14, V
IN
=3Vrms
Volume control range
BW=IHF
−A, Measure : Pin13, 14, V
IN
=3Vrms
Maximum attenuation
Measure : Pin13, 14, V
IN
=0.4Vrms
Output gain control range
IQ
G
V
THD
Vomax
Vno
Rin
CTC
GVR
Vmin
GOG
GOG
Symbol
−
−2
−
3.4
−
20
−
−106
−
16
Min.
6
0.09
−
5
5
40
−70
−100
−105
−105
20
Max.
mA
dB
%
Vrms
μVrms
kΩ
dB
dB
dB
dB
dB
dB
Unit
Conditions
2
0
0.005
4.2
1.2
1.2
30
−100
−103
−118
−103
−118
18
Typ.
Parameter
+2
z
zApplication circuit diagram
14
OUT1
13
OUT2
12
SEL
DGND
MUTE
11
10
DA
V
CC
V
EE
AGND
AGND
AGND
IN 1
9
CL
8
7
6
5
4
2
LOGIC
+
+
47μ
10μ
IN 2
+
10μ
+
47μ
3
1
BD3812F
UNIT
CAPACITOR : F
+
+
−
−
Harman Kardon
AVR 171 Service Manual
Page 115 of 174
Appendix
Appendix1-Rev1.1
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.
(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.
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.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
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.
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.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
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.
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.
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.
Harman Kardon
AVR 171 Service Manual
Page 116 of 174
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