STV9555 ST Microelectronics, STV9555 Datasheet - Page 14

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

STV9555
10.4 Video response optimization: schematics in DC-coupling mode
The dynamic video response is optimized by carefully designing the supply decoupling of the video board
(see Section 10.7), the tracks (see Section 10.7), then by adjusting the input/output component network
(see Section 10.5).
For dynamic measurements such as rise/fall time and bandwidth, a 8pF load is used (total load including
the parasitic capacitance of the PC board and CRT Socket).
When used in kit with the STV921x preamplifier from ST, the preamplifier bandwidth register (BW, register
13) must be set to minimum (o dec) for an application with t
Figure 17. Video response optimization for one channel - DC coupling application
14/24
Caution: For Application with Tr/Tf>5.5ns, the PreAmplifier bandwidth register (BW, Register 13)
must be set to minimum value (0 dec)
(
(
(***): R19 must be mandatorily used
See Application note AN1510 for complete description.
2 other Input Networks (Network #2 and #3 below) can be used in replacement of the reference Input Network #1.
*
**
Input Network #2
): To be connected as close as possible to the device
): R1 must be not be higher than 100
0.33 H
82
R1
L1
OUT
10pF
C2
Input Network #1
IN
R1(**)
Reference
1.5nF
51
C1
4.7 F
10pF
Input Network #3
C11
C2
33
R1
IN
15pF
C2
V
V
GNDA
C10(*)
100nF
CC
REF
STV9555
IN
+
-
C12(*)
100nF
GNDS
V
DD
R
/t
F
>5.5ns.
GNDP
OUT
R19(***)
33-40
110
R10
0.33 H
L1
4.7 F
C24
110
R11
V
DD
CRT