THS7314

(ACTIVE) 3-Channel SDTV Video Amp with 5th Order Filter and 6-dB Gain

Diagrams

Functional Diagram

Description

Fabricated using the Silicon-Germanium (SiGe) BiCom-III process, the THS7314 is a low power single-supply 3-V to 5-V 3-channel integrated video buffer. It incorporates a 5th-order Butterworth filter which is useful as a DAC reconstruction filter or an ADC anti-aliasing filter. The 8.5-MHz filter is a perfect choice for SDTV video which includes Composite (CVBS), S-Video, Y'U'V', G'B'R' (R'G'B'), and Y'P'BP'R 480i/576i.

As part of the THS7314 flexibility, the input can be configured for ac or dc coupled inputs. The 285-mV output level shift to allow for a full sync dynamic range at the output with 0-V input. The AC coupled modes include a transparent sync-tip clamp option for CVBS, Y', and G'B'R' signals with sync. AC-coupled biasing for C'/P'B/P'R channels is achieved by adding an external resistor to Vs+.

The THS7314 is the perfect choice for all output buffer applications. Its rail-to-rail output stage with 6-dB gain allows for both ac and dc line driving. The ability to drive 2-lines, or 75-Ω loads, allows for maximum flexibility as a video line driver. The 16-mA total quiescent current at 3.3-V makes it an excellent choice for USB powered, portable, or other power sensitive video applications.

The THS7314 is available in a small SOIC-8 package that is RoHS compliant.

Features

  • 3 SDTV Video Amplifiers for CVBS, S-Video, Y'P'BP'R 480i/576i, Y'U'V', or G'B'R' (R'G'B')
  • Integrated Low-Pass Filters
    • 5th-Order 8.5-MHz (–3dB) Butterworth
      • –1dB Passband Bandwidth at 7-MHz
      • 47dB Attenuation at 27-MHz
  • Versatile Input Biasing
    • DC-Coupled With 285-mV Output Shift
    • AC-Coupled with Sync-Tip Clamp
    • Allows AC-Coupled With DC-Biasing
  • Built-in 6dB Gain (2V/V)
  • 3-V to 5-V Single Supply Operation
  • Rail-to-Rail Output:
    • Output Swings Within 100-mV From the Rails Allowing AC or DC Output Coupling
    • Able to Drive up to 2 Video Lines – 75 Ω
  • Low 16-mA at 3.3-V Total Quiscent Current
  • Low Differential Gain/Phase of 0.1% / 0.1°
  • SOIC-8 Package
  • APPLICATIONS
    • Set Top Box Output Video Buffering
    • PVR/DVDR Output Buffering
    • USB/Portable Low Power Video Buffering

Parametrics

Diff Gain (%) 0.1    
Output Current (Typ) (mA) 70    
Vs (Min) (V) 2.85    
Vs (Max) (V) 5.5    
Diff Phase (deg) 0.1    
Number of Channels (#) 3    
Operating Temperature Range (C) -40 to 85    
Package Group SOIC|8    
Package Size: mm2:W x L (PKG) 8SOIC: 29 mm2: 6 x 4.9 (SOIC|8)    
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Technical Documents

Datasheet (1)

Application notes (1)

Design files (1)

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