1FEATURES

2345• 3-Video Amplifiers for CVBS, S-Video, EDTV,

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

• H/V Sync Paths with Adjustable Schmitt

Trigger

• 2:1 Input Mux

• I2C Control of All Functions on Each Channel

• Unity-Gain Buffer Path for ADC Buffering:

– 500-MHz Bandwidth, 1200-V/μs Slew Rate

• Monitor Pass-Through Function:

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

– 6-dB Gain with SAG Correction Capable

– High Output Impedance in Disable State

• Selectable Input Bias Modes:

– AC-Coupled with Sync-Tip Clamp

– AC-Coupled with Bias

– DC-Coupled with Offset Shift

– DC-Coupled

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

• 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

APPLICATIONS

• Projectors

• Professional Video Systems

• LCD/ DLP®/LOCS Input Buffering

DESCRIPTION

Fabricated using the revolutionary complimentary

silicon-germanium (SiGe) BiCom3 process, the

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

3-channel integrated video buffer with horizontal (H)

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

500-MHz bandwidth, 1200-V/μs unity-gain buffer ideal

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

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

a monitor pass-through path allows for passing the

input signal on to other systems. This path has a

6-dB gain, 500-MHz bandwidth, 1300-V/μs slew rate,

SAG correction capability, and high output impedance

while disabled.

Each channel of the THS7347 is individually

I2C-configurable for all functions, including controlling

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

for both ac- and dc-coupling applications.