• 3-Video Amplifiers for CVBS, S-Video, SD/ED/HD Y'P'_BP'_R, G'B'R', and R'G'B' Video
• HV Sync Paths With Adj. Schmitt Trigger
• 2:1 Input MUX
• I²C Control of All Functions
• Integrated Low-Pass Filters on ADC Buffers
  • 5^th Order Butterworth Characteristics
  • Selectable Corner Frequencies of 9-MHz, 16-MHz, 35-MHz, and 75-MHz with Bypass (500-MHz)
• Selectable Input Bias Modes
  • AC-Coupled with Sync-Tip Clamp
  • AC-Coupled with Bias
  • DC-Coupled with Offset Shift
  • DC-Coupled
• Monitor Pass-Thru Function:
  • Passes the Input Signal With no Filtering
  • 500-MHz BW and 1300 V/µs Slew Rate
  • 6-dB Gain With SAG Correction Capable
  • High Output Impedance in Disable State
• 2.7-V to 5-V Single Supply Operation
• Low 330 mW at 3.3-V Power Consumption
• Disable Function Reduces Current to <1 µA
• Rail-to-Rail Output:
  • Output Swings Within 0.1 V From the Rails Which Allows AC or DC Output Coupling
• RoHS TQFP Package
• APPLICATIONS
  • Projectors
  • Professional Video Systems
  • LCD/DLP/LOCS Input Buffering

PowerPAD is a trademark of Texas Instruments.
S-Video is a trademark of its respective owner.
I2C is a trademark of Philips Electronics.

Fabricated using the new complimentary silicon-germanium (SiGe) BiCom-III process, the THS7327 is a low-power, single-supply 2.7-V to 5-V, 3-channel integrated video buffer with H and V Sync signal paths. It incorporates a selectable 5^th order Butterworth anti-aliasing filter on each channel. The 9-MHz is a perfect choice for SDTV video including composite, S-Video™, and 480i/576i. The 16-MHz filter is ideal for EDTV 480p/576p, and VGA signals. The 35-MHz filter is useful for HDTV 720p/1080i, and SVGA signals. The 75-MHz filter is ideal for HDTV 1080p and XGA/SXGA signals. For UXGA/QXGA R’G’B’ signals, the filter can be bypassed allowing a 500-MHz bandwidth, 1150-V/µs amplifier to buffer the signal.

Each channel of the THS7327 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. The monitor pass-thru path allows for passing the input signal, with no filtering, on to other systems. This path has a 6-dB Gain, 500-MHz bandwidth, 1300V/µs slewrate, SAG correction capability, and a high output impedance while disabled to add to the flexibility of the THS7327.

As part of the THS7327’s flexibility, the input can be selected for ac or dc coupled inputs. The ac-coupled modes include a sync-tip clamp option for CVBS/Y’/G’B’R’ with sync or a fixed bias for the C’/P’_B/P’_R/R’G’B’ channels without sync. The dc input options include a dc input or a dc+Offset shift to allow for a full sync dynamic range at the output with 0-V input.

The THS7327 is available in a RoHS Compliant TQFP package.