STV9553

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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>300

Ω), 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 Figure 17, but 2 other networks (#2 and #3) can be

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 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.

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 Figure 17.

Cross talk: Output and input tracks must be set apart. The STV9553 pin-out allows the easy separa-

tion of input and output tracks on opposite sides of the amplifier (see Figure 21).

Length: Connection between amplifier output and cathode must be as short and direct as possible.