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.