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PDF BH7673G Data sheet ( Hoja de datos )
| Número de pieza | BH7673G | |
| Descripción | Video isolation amplifier | |
| Fabricantes | ROHM Semiconductor | |
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The accessory IC series for the video
Video isolation amplifier
BH7673G
No.15069EBT01
●General
BH7673G is the single isolation video amplifier. It can reject the external noise when it receives the signal outside of the
application. It can reduce the influence of the external noise substantially. Because it has high common mode noise
rejection ratio (-60dB Typ.). It is the best for the application of automotives, because it is able to use a wide range of
temperature and it has the high electrostatic discharge rating. Moreover, because the frequency characteristic can
correspond to the Hi-Vision signal, it is at the development to equal to or more than 30 MHz.
●Features
1) The high Electrostatic discharge(ESD) rating (The human body model：±6000V pass)
2) Abele to use a wide range of temperature, from -40℃ to +85℃
3) High common mode rejection ratio(Typ. -60dB, f=20kHz)
4) It is not the degradation of CMRR when inserting ESD resistance at the input terminal.
5) Wide band [suitable for D4 standard] (0dB at f=30MHz)
6) Wide output dynamic range(Typ. 3.8Vpp)
7) High input Impedance(Typ. 150kΩ)
8) Low circuit current consumption(Typ. 4.8mA)
9) Bias input
10) SSOP5 small package
●Applications
The car navigation systems, the car monitor etc.
The signal input to the rear monitor, the picture taking-in from the rear camera and the measure of the noise when pulling
around a video signal out of the substrate.
●Absolute Maximum Ratings (Ta=25℃)
Parameter
Symbol
Supply voltage
VCC
Power dissipation
Pd
Input voltage range
VIN
Operating temperature
Topr
Storage temperature
Tstg
* Reduced by 5.4mW/℃ at 25℃ or higher
When mounting on a 70mmX70mmX1.6mm PCB board.
Limits
7.0
540 ＊1
0～VCC+0.2
-40～+85
-55～+125
Unit
V
mW
V
℃
℃
●Operating Condition (Ta=25℃)
Parameter
Symbol
Min.
Supply voltage
VCC
4.5
* This product is not designed for protection against radioactive rays.
Typ.
5.0
Max Unit
5.5 V
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
1/9
2015.03 - Rev.B
1 page  
BH7673G
Technical Note
●Cautions for use
1. The numerical values and data shown here are typical design values, not guaranteed values.
2. The application circuit examples show recommended circuits, but characteristics should be checked carefully before using
these circuits. If any external part constants are modified before use, factors such as variation in all external parts and
ROHM LSI ICs, including not only static characteristics but also transient characteristics, should be fully considered to set
an ample margin.
3. Absolute maximum ratings
If the absolute maximum ratings for applied voltage and/or operation temperature are exceeded, LSI damage may
result. Therefore, do not apply voltage or use in a temperature that exceeds these absolute maximum ratings. If it
is possible that absolute maximum ratings will be exceeded, use a physical safety device such as a fuse and make
sure that no conditions that might exceed the absolute maximum ratings will be applied to the LSI IC.
4. GND potential
Regardless of the operation mode, the voltage of the GND pin should be at least the minimum voltage. Actually check
whether or not the voltage at each pin, including transient phenomena, is less than the GND pin voltage.
5. Thermal design
The thermal design should be done using an ample margin that takes into consideration the allowable dissipation under
actual use conditions.
6. Shorts between pins and mounting errors
When mounting LSI ICs onto the circuit board, make sure each LSI's orientation and position is correct. The ICs may
become damaged if they are not mounted correctly when the power is turned on. Similarly, damage may also result if a
short occurs, such as when a foreign object is positioned between pins in an IC, or between a pin and a power supply or
GND connection
7. Operation in strong electromagnetic field
When used within a strong electromagnetic field, evaluate carefully to avoid the risk of operation faults
8. Place the power supply's decoupling capacitor as close as possible to the VCC pin (PIN 3) and GND pin (PIN 2).
9. The parasitic capacitance of the application board may cause the peak of the frequency characteristic response to occur at
a high frequency. To lower the peak of the frequency characteristic, connect in series resistors having resistance of
several dozen ohm to several hundred ohm as close as possible to the output pin.
OUT 1
Fig.7
Resistors (several dozen Ω to
several hundredΩ) to lower peak
frequency
Positions where Resistors are Inserted to Lower Peak Frequency Response
10. The attention point when treating HD signal
As shown in reference data Fig.20, BH7673G have the frequency characteristic of equal to or more than 30 MHz but by the
influence with the parasitic capacitance of the application board and so on, a characteristic as in the carrying data isn't
sometimes gotten. The frequency characteristic can be improved in inserting about 2kΩ ~ 3kΩ resistance between the
output terminal and the GND terminal to the case.
OUT 1
GND 2
The resistance for the frequency characteristic
improvement2kΩ～3kΩ
Fig.8 The resistance insertion position for the frequency characteristic improvement
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
5/9
2015.03 - Rev.B
5 Page 
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 concerned goods might be fallen under listed items of export control prescribed by Foreign exchange and Foreign
trade act, please consult with ROHM 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.
2. ROHM shall not have any obligations where the claims, actions or demands arising from the combination of the
Products with other articles such as components, circuits, systems or external equipment (including software).
3. 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 Products or the information contained in this document. Provided, however, that ROHM
will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to
manufacture or sell products containing the Products, subject to the terms and conditions herein.
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-PGA-E
© 2015 ROHM Co., Ltd. All rights reserved.
Rev.001
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet BH7673G.PDF ] | |
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