描述 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.

特性 Features

? 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