1FEATURES
2• 500MHz SMALL-SIGNAL BANDWIDTH
• 500MHz, 2VPP BANDWIDTH
• 0.1dB GAIN FLATNESS to 120MHz
• 10ns CHANNEL SWITCHING TIME
• LOW SWITCHING GLITCH: 40mV PP
• 2300V/μs SLEW RATE
• 0.035%/0.005° DIFFERENTIAL GAIN, PHASE
• QUIESCENT CURRENT = 10.6mA
• 1.1mA QUIESCENT CURRENT IN SHUTDOWN
MODE
• 88dB OFF ISOLATION IN DISABLE OR
SHUTDOWN (10MHz)

APPLICATIONS
• VIDEO ROUTER
• LCD AND PLASMA DISPLAY
• HIGH SPEED PGA
• DROP-IN UPGRADE TO AD8174

DESCRIPTION
The OPA4872 offers a very wideband 4:1 multiplexer
in an SO-14 package. Using only 10.6mA, the
OPA4872 provides a user-settable output amplifier
gain with greater than 500MHz large-signal
bandwidth (2VPP). The switching glitch is improved
over earlier solutions using a new (patented) input
stage switching approach. This technique uses
current steering as the input switch while maintaining
an overall closed-loop design. The OPA4872 exhibits
an off isolation of 88dB in either Disable or Shutdown
mode. With greater than 500MHz small-signal
bandwidth at a gain of 2, the OPA4872 gives a typical
0.1dB gain flatness to greater than 120MHz.
System power may be optimized using the chip
enable feature for the OPA4872. Taking the chip
enable (EN) line high powers down the OPA4872 to
less than 3.4mA total supply current. Further power
reduction to 1.1mA quiescent current can be
achieved by bringing the shutdown (SD) line high. Muxing multiple OPA4872s outputs together, then
using the chip enable to select which channels are
active, increases the number of possible inputs.