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

www.ti.com

SLOS531B

– MAY 2007 – REVISED OCTOBER 2011

3-Channel RGBHV Video Buffer with I2C

™ Control, 2:1 Input Mux,

Monitor Pass-Through, and Selectable Input Bias Modes

Check for Samples: THS7347

1

FEATURES

APPLICATIONS

2345

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

•

Projectors

HDTV Y'P'BP'R, G'B'R', and R'G'B' Video

•

Professional Video Systems

•

H/V Sync Paths with Adjustable Schmitt

•

LCD/ DLP®/LOCS Input Buffering

Trigger

•

2:1 Input Mux

DESCRIPTION

Fabricated using the revolutionary complimentary

•

I2C Control of All Functions on Each Channel

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)

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

•

Monitor Pass-Through Function:

500-MHz bandwidth, 1200-V/

μs unity-gain buffer ideal

– 500-MHz Bandwidth, 1300-V/μs Slew Rate

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

– 6-dB Gain with SAG Correction Capable

video decoders. In parallel with the unity-gain buffer,

– High Output Impedance in Disable State

a monitor pass-through path allows for passing the

input signal on to other systems. This path has a

•

Selectable Input Bias Modes:

6-dB gain, 500-MHz bandwidth, 1300-V/

μs slew rate,

– AC-Coupled with Sync-Tip Clamp

SAG correction capability, and high output impedance

– AC-Coupled with Bias

while disabled.

– DC-Coupled with Offset Shift

Each

channel

of

the

THS7347

is

individually

– DC-Coupled

I2C-configurable for all functions, including controlling

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

(One of Three R

'G'B' Channels Shown)

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

PowerPAD is a trademark of Texas Instruments.

3

DLP is a registered trademark of Texas Instruments.

4

I2C is a trademark of NXP Semiconductors, Inc.

5

All other 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.