Datasheet
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SBOS235E − MARCH 2002− REVISED MAY 2009
www.ti.com
13
The OPA357 can be used as an amplifier for RGB graphic
signals, which have a voltage of zero at the video black
level, by offsetting and AC-coupling the signal. See
Figure 5.
1/2
OPA2357
604
Ω
1
µ
F
R
2
10nF
604
Ω
+3V
R
1
V+
75
Ω
Red
Green
Blue
604
Ω
Red
(1)
R
2
R
1
V+
Green
(1)
R
2
R
1
V+
Blue
(1)
75
Ω
OPA357
1
µ
F 10nF
+3V
75
Ω
75
Ω
1/2
OPA2357
604
Ω
75
Ω
604
Ω
604
Ω
75
Ω
+
+
NOTE: (1) Source video signal offset
300mV above ground to accomodate
op amp swing−to−ground capability.
Figure 5. RGB Cable Driver