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APPLICATIONS

DESCRIPTION

3.3V

3.3V

2:1

Input1

0.1 F

m

0.1 F

m

0.1 F

m

In A

InB

Input2

75 W

ADC

AC

Sync

TIP

Clamp

DC

X1

DC

+Offset

AC-

BIAS

+

-

1kW

878 W

675 W

150 W

+

-

Out

SAG

47 F

m

33 F

m

75 W

75 W

Monitor

Output

75 W

SDA

SCL

Disable

=

OPEN

THS7347

SLOS531 – MAY 2007

Monitor Pass-Through, and Selectable Input Bias Modes

• Projectors

• 3-Video Amplifiers for CVBS, S-Video, EDTV,

• Professional Video Systems

• H/V Sync Paths with Adjustable Schmitt

Trigger

• 2:1 Input Mux

Fabricated using the revolutionary complementary

silicon-germanium

(SiGe)

BiCom3

process,

the

• Unity-Gain Buffer Path for ADC Buffering:

THS7347 is a low-power, single-supply 2.7-V to 5-V

–

500-MHz Bandwidth, 1200-V/

µs Slew Rate

3-channel integrated video buffer with horizontal (H)

• Monitor Pass-Through Function:

and vertical (V) sync signal paths. It incorporates a

500-MHz bandwidth, 1200-V/

µs unity-gain buffer

–

500-MHz Bandwidth, 1300-V/

µs Slew Rate

ideal for driving analog-to-digital converters (ADCs)

–

6-dB Gain with SAG Correction Capable

and video decoders. In parallel with the unity-gain

–

High Output Impedance in Disable State

buffer, a monitor pass-through path allows for

passing the input signal on to other systems. This

• Selectable Input Bias Modes:

path has a 6-dB gain, 500-MHz bandwidth, 1300V/

µs

–

AC-Coupled with Sync-Tip Clamp

slew rate, SAG correction capability, and high output

–

AC-Coupled with Bias

impedance while disabled.

–

DC-Coupled with Offset Shift

Each

channel

of

the

THS7347

is

individually

–

DC-Coupled

the 2:1 input mux. Its rail-to-rail output stage allows

• +2.7-V to +5-V Single-Supply Operation

for both ac- and dc-coupling applications.

• Total Power Consumption: 265 mW at 3.3 V

• Disable Function Reduces Current to 0.1 µA

• Rail-to-Rail Output:

–

Output Swings Within 0.1 V of the Rails,

Allowing AC- or DC-Output Coupling

• Lead-free, RoHS TQFP Package

3.3 V Single-Supply Projector Input System with Monitor Pass-Through

(1 of 3 R'G'B' Channels Shown)

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.

PowerPAD is a trademark of Texas Instruments.

DLP is a registered trademark of Texas Instruments.

I2C is a trademark of NXP Semiconductors, Inc.

All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2007, 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.