OP
A4
8
72
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SBOS444 – DECEMBER 2008
4:1 HIGH-SPEED MULTIPLEXER
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FEATURES
500-MHz Small-Signal Bandwidth
500-MHz, 2-V
PP
Bandwidth
0.1-dB Gain Flatness to 120 MHz
10-ns Channel-Switching Time
Low Switching Glitch: 40 mV
PP
2300-V/µs Slew Rate
0.035%/0.005° Differential Gain, Phase
Quiescent Current = 10.6 mA
1.1-mA Quiescent Current in Shutdown Mode
88-dB Off Isolation in Disable or Shutdown
(10 MHz)
APPLICATIONS
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Video Router
LCD and Plasma Display
High Speed PGA
Drop-In Upgrade to AD8174
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SUPPORTS DEFENSE, AEROSPACE,
AND MEDICAL APPLICATIONS
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(1)
Controlled Baseline
One Assembly/Test Site
One Fabrication Site
Available in Military (–55°C/125°C),
Temperature Range
(1)
Extended Product Life Cycle
Extended Product-Change Notification
Product Traceability
Additional temperature ranges available - contact factory
DESCRIPTION
The OPA4872 offers a very wideband 4:1 multiplexer in an SO-14 package. Using only 10.6 mA, the OPA4872
provides a user-settable output amplifier gain with greater than 500-MHz large-signal bandwidth (2 V
PP
). 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 500-MHz
small-signal bandwidth at a gain of 2, the OPA4872 gives a typical 0.1-dB gain flatness to greater than 120 MHz.
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 3.4 mA 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.
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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.
All trademarks are the property of their respective owners.
Copyright © 2008, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
TI [ TEXAS INSTRUMENTS ]
