OPA357 Datasheet, PDF (14/23 Pages) Burr-Brown (TI) – 250MHz, Rail-to-Rail I/O, CMOS Operational Amplifier with Shutdown

OPA357
OPA2357
SBOS235C − MARCH 2002− REVISED MAY 2004
WIDEBAND VIDEO MULTIPLEXING
One common application for video speed amplifiers which
include an enable pin is to wire multiple amplifier outputs
together, then select which one of several possible video
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inputs to source onto a single line. This simple Wired-OR
Video Multiplexer can be easily implemented using the
OPA357; see Figure 6.
Signal #1
+2.5V
+
1µF
10nF
49.9Ω
A
OPA357
+
1µF
10nF
Signal #2
−2.5V
1kΩ
1kΩ
+2.5V
+ _1µF
10nF
49.9Ω
B
OPA357
+ _1µF
10nF
B_ON
Select
A_ON
−2.5V
1kΩ
1kΩ
HCO4
49.9Ω
V_OUT
49.9Ω
Figure 6. Multiplexed Output
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