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OPA690 Datenblatt(PDF) 13 Page - Texas Instruments

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Teilenummer OPA690
Bauteilbeschribung  Wideband, Current Feedback OPERATIONAL AMPLIFIER With Disable
PDF  23 Pages
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Hersteller  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

OPA690 Datenblatt(HTML) 13 Page - Texas Instruments

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OPA691
13
SBOS226A
www.ti.com
FIGURE 4. 2-Channel Video Multiplexer.
also ensures that the maximum differential voltage across
the inputs of the unselected channel do not exceed the rated
±1.2V maximum for standard video signal levels.
The section on Disable Operation shows the turn-on and
turn-off switching glitches using a grounded input for a single
channel is typically less than
±50mV. Where two outputs are
switched (see Figure 6), the output line is always under the
control of one amplifier or the other due to the “make-before-
break” disable timing. In this case, the switching glitches for
two 0V inputs drop to < 20mV.
4-CHANNEL FREQUENCY CHANNELIZER
The circuit of Figure 5 is a 4-channel multiplexer. In this
circuit the OPA691 provides the drive for all 4 channels.
OPA691
V
OUT
75
Ω Cable
75
Ω Load
RG-59
75
Ω
402
Ω
OPA691
75
Ω
59
Ω
R
O
R
O
R
O
R
O
#1
DIS 1
OPA691
75
Ω
75
Ω
402
Ω
59
Ω
#2
DIS 2
OPA691
75
Ω
75
Ω
59
Ω
#3
DIS 3
+5V
–5V
+5V
–5V
+5V
–5V
+5V
–5V
+5V
–5V
OPA691
75
Ω
75
Ω
59
Ω
#4
DIS 4
402
Ω
402
Ω
402
Ω
402
Ω
402
Ω
402
Ω
OPA691
2k
Ω
82.5
Ω
75
Ω Cable
RG-59
82.5
Ω
402
Ω
340
Ω
Video 1
+5V
+5V
–5V
OPA691
2k
Ω
75
Ω
402
Ω
340
Ω
Video 2
–5V
+5V
75
Ω
V
DIS
DIS
DIS
FIGURE 5. 4-Channel Frequency Channelizer.



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