STV9211 STMicroelectronics, STV9211 Datasheet - Page 17

• Manufacturer Part Number: STV9211
• Manufacturer: STMicroelectronics

Specifications of STV9211

• Lead Free Status / Rohs Status: Compliant

STV9211
2.12
2.13
Amplifier bandwidth adjustment (7 bits)
Preamplifier bandwidth adjustment (4 bits)
An advanced feature: preamplifier bandwidth adjustment (BW: Register 13, see I
implemented on the STV9211.
The programming of this BW register is very important to get good video performances.
It must not be set its maximum value. With the following values, the optimum performances are
obtained.
For applications where rise/fall time <5.5ns, this feature offers several advantages:
The STV9211 can adjust the bandwidth of any ST video amplifier having a dedicated control pin
(CTL). The adjustment is done by I
If not used, the AMPCTL pin must be connected to ground.
Slew-rate: depending on the external capacitive load and on the peak-to-peak output voltage,
this adjustment avoids getting any slew-rate phenomenon.
Electromagnetic radiation (EMI): slowing down the signal of rise/fall time will decrease the EMI
without significantly deteriorating the rise/fall time of the CRT driver.
Video signal response: using this adjustment will allow to optimize the high frequency transient
phenomenons.
Picture boost mode: when displaying still pictures or moving video, having high video swing
can be of greater interest than rise/fall time. The preamplifier bandwidth adjustment can be
used to avoid any slew-rate phenomenon at the CRT driver output.
10 ns and below
5.5 ± 1 ns
7.5 ± 1ns
9.5 ± 1ns
t
R
/t
F
2
C via Register 6 (see I
Preamplifier bandwidth register: BW
Binary
1000
0101
0010
0000
2
C table 2).
Decimal
8
5
2
0
Functional description
2
C table 5), is
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