THS7314中文资料具有 5 阶滤波器和 6dB 增益的 3 通道 SDTV 视频放大器数据手册TI规格书

描述 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.

特性 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