Datasheet

50W
+5V
50W
523W
OPA695
-5V
+5V
50W
511W
511W
OPA695
-5V
+5V
50W
453W
149W
OPA695
-5V
+5V
-5V
+5V
50W
402W
57.6W
OPA4872
OPA695
-5V
50W
To50 LoadW
Logic
IN0
IN1
IN2
IN3
A0 A1
523W
523W
SD
EN
2-Bit,High-SpeedPGA,GreaterThan300MHzChannelBandwidth
G=1V/V
G=2V/V
G=4V/V
G=8V/V
OPA4872
www.ti.com
SBOS346C JUNE 2007REVISED MARCH 2011
4:1 High-Speed Multiplexer
Check for Samples: OPA4872
1
FEATURES
DESCRIPTION
The OPA4872 offers a very wideband 4:1 multiplexer
2
500MHz SMALL-SIGNAL BANDWIDTH
in an SO-14 package. Using only 10.6mA, the
500MHz, 2V
PP
BANDWIDTH
OPA4872 provides a user-settable output amplifier
0.1dB GAIN FLATNESS to 120MHz
gain with greater than 500MHz large-signal
bandwidth (2V
PP
). The switching glitch is improved
10ns CHANNEL SWITCHING TIME
over earlier solutions using a new (patented) input
LOW SWITCHING GLITCH: 40mV
PP
stage switching approach. This technique uses
2300V/μs SLEW RATE
current steering as the input switch while maintaining
an overall closed-loop design. The OPA4872 exhibits
0.035%/0.005° DIFFERENTIAL GAIN, PHASE
an off isolation of 88dB in either Disable or Shutdown
QUIESCENT CURRENT = 10.6mA
mode. With greater than 500MHz small-signal
1.1mA QUIESCENT CURRENT IN SHUTDOWN
bandwidth at a gain of 2, the OPA4872 gives a typical
MODE
0.1dB gain flatness to greater than 120MHz.
88dB OFF ISOLATION IN DISABLE OR
System power may be optimized using the chip
SHUTDOWN (10MHz)
enable feature for the OPA4872. Taking the chip
enable (EN) line high powers down the OPA4872 to
APPLICATIONS
less than 3.4mA total supply current. Further power
reduction to 1.1mA quiescent current can be
VIDEO ROUTER
achieved by bringing the shutdown (SD) line high.
LCD AND PLASMA DISPLAY
Muxing multiple OPA4872s outputs together, then
HIGH SPEED PGA
using the chip enable to select which channels are
active, increases the number of possible inputs.
DROP-IN UPGRADE TO AD8174
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 20072011, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.

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