BH76361FV-E2 Rohm Semiconductor, BH76361FV-E2 Datasheet - Page 7

• Manufacturer Part Number: BH76361FV-E2
• Description: IC VIDEO DVR -0.1DB BIAS 16-SSOP
• Manufacturer: Rohm Semiconductor

Specifications of BH76361FV-E2

• Applications: 6:1 Multiplexer-Amplifier
• Number Of Circuits: 1
• Current - Supply: 10mA
• Voltage - Supply, Single/dual (±): 2.8 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: BH76361FV-E2TR

● Cautions for selection and use of application parts
When using this IC by itself ①
When this IC is used as a standalone device ②
When this IC is used as a standalone device ③
© 2009 ROHM Co., Ltd. All rights reserved.
BH76330FVM, BH76331FVM, BH76360FV, BH76361FV,
BH76332FVM, BH76333FVM, BH76362FV, BH76363FV
www.rohm.com
Method for determining capacity of input coupling capacitor
Method for determining capacity of output coupling capacitor
The HPF is comprised of an input coupling capacitor and the internal input impedance Zin of the IC. Since the fc value of this HPF is
determined using the following equation (a), the above recommended capacity for the input capacitor is derived. Usually, the cutoff
frequency fc is several Hz.
When evaluating the sag characteristics and determining the capacity of the capacitor during video signal input, a horizontal stripe signal
called "H bar" (shown in Fig. 10) is suitable, and this type of signal is used instead of a color bar signal to evaluate characteristics and
determine capacity.
The output pins of models with a 75 driver [BH76330FVM and BH76331FVM] have an HPF comprised of an output coupling capacitor and
load resistance R
approximately 470 µF to 1000 µF.
As for models without the 75 driver, an HPF is similarly comprised using the capacity of the output coupling capacitor and the input
impedance of the IC connected at the next stage, and the capacitance required for the output coupling capacitor should be estimated using
equation (a).
In models that include a 75 driver [BH76330FVM and BH76331FVM], up to two monitors (loads) can be connected (a connection example
is shown in Fig. 12). When there are multiple loads, the number of output coupling capacitors must be increased or a larger capacitance
must be used, based on the table shown below.
The BH76330FVM is the only model that can be used without an output coupling capacitor.
This use method not only enables reductions in board space and part-related costs, but it is able to improve the sag characteristics by
improving low-range frequency response. However, when the output coupling capacitor is omitted, a direct current flows to the connected
set, so the specifications of the connected set should be noted carefully before starting use.
Note also that only one load can be connected when the output coupling capacitor is omitted.
Application circuit example
fc = 1 / (2π × C × Zin)・・・・(a)
Fig. 12 (a) Application Circuit Example 1 (Two Drives)
Sync_Tip_Clamp
Input type
L
Fig. 12 (a)
Fig. 12 (b)
(= 150). When fc is set to approximately 1 Hz or 2 Hz, the capacity of the output coupling capacitor needs to be
Bias
OUT
Fig.11 Example of Screen with Obvious Sag (H-bar Signal)
7
470μF
470μF
75Ω
75Ω
monitor
monitor
Fig.13 Application Example without Output Coupling Capacitor
75Ω
75Ω
No. of output capacitors
BH76330FV
Input impedance
No. of drives required
150 k
10 M
Zin
OUT
1
7
7/32
75Ω
Capacity of input coupling
capacitor (recommended
monitor
Fig. 12 (b) Application Circuit Example 2 (Two Drives)
Capacitance per output capacitor (recommended values)
75Ω
0.1 µF
4.7 µF
value)
470 µF to 1000 µF (same as with one drive)
OUT
(No. of drive × 470 µF to 1000) uF
7
(470×2)μF
Voltage at output ≒0.16V
When this voltage load resistance is applied,
a direct current is generated.
0 2V
75Ω
75Ω
monitor
monitor
Capacity of output coupling
capacitor (recommended
75Ω
75Ω
470 µF to 1000 µF
value)
Technical Note
2009.04 - Rev.A