STV9555 ST Microelectronics, STV9555 Datasheet - Page 15

• Manufacturer Part Number: STV9555
• Description: 9.5 ns TRIPLE-CHANNEL HIGH VOLTAGE VIDEO AMPLIFIER
• Manufacturer: ST Microelectronics

10.5 Video response optimization: outputs networks
The output network (R10/L1/R11) is used to adjust the amplifier video performances. Once R10 and R11
resistors are set to protect the application against arcing (R10 + R11>200 ), it is possible to increase the
bandwidth by increasing L1.
10.6 Video response optimization: inputs networks
The input network also plays an important role in the device dynamic behaviour. We recommend to use
the reference input network #1, which is described in
used to better match the required performances and the video board layout. Refer to the application note
referenced AN1510 for the complete description of these input networks.
10.7 Video response optimization: layout and decoupling
The decoupling of V
the device is necessary to improve the dynamic performance of the video signal.
Careful attention has to be given to the three output channels of the amplifier.
Capacitor: The parasitic capacitive load on the amplifier outputs must be as small as possible.
Figure 9
increases. Reducing this capacitive load is achieved by moving away the output tracks from the other
tracks (especially ground) and by using thin tracks (<0.5mm), see
Cross talk: Output and input tracks must be set apart. The STV9555 pin-out allows the easy separa-
tion of input and output tracks on opposite sides of the amplifier (see
Length: Connection between amplifier output and cathode must be as short and direct as possible.
from
Section 8
CC
and V
DD
clearly shows the deterioration of the
through good quality HF capacitors (respectively C10 and C12) close to
Figure
17, but 2 other networks (#2 and #3) can be
Figure
t
R
Figure
/t
F
17.
when the capacitive load
21).
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