Datasheet

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2
3
4
5
6
7
8
9
10
11
12
V
CC
R
EXT
GND
B
IN
R
IN
G
IN
INPUT SELECT
P
B IN
P
R IN
Y
H SYNC
IN
V SYNC
IN
H SYNC
OUT
V SYNC
OUT
POWER SAVE
SD/HD SELECT*
AUTO/MANUAL
DETECT SELECT
GND
V
CC
B
OUT
R
OUT
G
OUT
100:
100:
SYNC on Y
GND
33:
33:
33:
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14
15
16
17
18
19
20
21
22
23
24
LCD
MONITOR
ADC
OR
CRT
PREAMP
LMH1251
SNLS193J –AUGUST 2005–REVISED MARCH 2013 www.ti.com
The RGBHV outputs cannot be used to drive standard 150Ω video loads and require high-bandwidth buffers for
this kind of application. For example, if the LMH1251 is to be designed into a stand-alone converter box
application, the configuration in Figure 8 is recommended. To drive a display monitor over a standard VGA cable,
a wideband, low distortion triple video buffer, such as the LMH6739, can be used with a gain of +2 to drive the
RGB video signals of the LMH1251, and logic inverters can be used to drive its H and V sync signals.
Figure 7. Typical LMH1251 Application
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