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

To50

Load

W

Logic

IN0

IN1

IN2

IN3

A0 A1

523W

523W

SD

EN

2-Bit,High-SpeedPGA,GreaterThan300MHzChannelBandwidth

G=1V/V

G=2V/V

G=4V/V

G=8V/V

OPA4872

www.ti.com

SBOS346C

– JUNE 2007 – REVISED 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

•

OPA4872 provides a user-settable output amplifier

•

0.1dB GAIN FLATNESS to 120MHz

gain

with

greater

than

500MHz

large-signal

•

10ns CHANNEL SWITCHING TIME

over earlier solutions using a new (patented) input

•

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.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2007–2011, 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.