THS7315| Datasheet

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THS7315
www.ti.com
SLOS532 JUNE 2007

3-Channel SDTV Video Amplifier with 5th-Order Filters and 5.2-V/V Gain
FEATURES
Three 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 47 dB Attenuation at 27 MHz Versatile Input Biasing: DC-Coupled with 230-mV Output Shift AC-Coupled with Sync-Tip Clamp Allows AC-Coupled With DC-Biasing Built-in 5.2 V/V Gain (14.3 dB) +3-V to +5-V Single Supply Operation Rail-to-Rail Output: Output Swings Within 100 mV of the Rails, Allowing AC- or DC-Output Coupling Supports Driving Two Lines per Channel Low Total Quiescent Current: 15.6 mA at 3.3 V Low Differential Gain/Phase of 0.2%/0.3 Lead-free, Green SOIC-8 Package

DESCRIPTION
Fabricated using the revolutionary complementary silicon-sermanium (SiGe) BiCom3 process, the THS7315 is a low-power, single-supply, 3-V to 5-V 3-channel integrated video buffer. It incorporates a 5th-order Butterworth filter that is useful as a digital-to-analog converter (DAC) reconstruction filter or an analog-to-digital converter (ADC) anti-aliasing filter. The 8.5-MHz filter is a perfect choice for SDTV video, including Composite Video Baseband Signals (CVBS), S-Video, Y'U'V', G'B'R' (R'G'B'), and Y'P'BP'R 480i/576i. The THS7315 inputs can be either ac- or dc-coupled. The 230-mV output level shift allows 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 bottom-level sync. AC-coupled biasing for C'/P'B/P'R channels can easily be achieved by adding an external resistor to VS+. The THS7315 is the perfect choice for all output buffer applications. Its rail-to-rail output stage with 5.2-V/V gain a
llows for both ac and dc line driving, making it a perfect choice for DaVinciTM processors. The ability for each channel to drive two video lines, or 75- loading, allows for maximum flexibility as a video line driver. The 15.6-mA quiescent current at 3.3 V also makes it an excellent choice for USB-powered, portable, or other power-sensitive video applications The THS7315 is available in a small SOIC-8 package that is lead-free and compliant with green requirements.
CVBS OUT

APPLICATIONS
Set Top Box Output Video Buffering PVR/DVDR Output Buffering USB/Portable Low-Power Video Buffering

+1.8 V

75 W DAC/ Encoder (DaVinci
TM

CVBS ) 500 W THS7315 1 CH.1 IN Y' 500 W 2 CH.2 IN 3 CH.3 IN 4 VS+ C' 500 W 3.3 V CH.1 OUT 8 CH.2 OUT 7 CH.3 OUT 6 GND 5 S-Video 75 W

75 W
Y' OUT

SDTV CVBS S-Video Y' S-Video C' 480i/576i Y'P'BP'R G'B'R'

Gain = 5.2 V/V

75 W

C' OUT

75 W

3.3-V Single-Supply DC-Input/DC-Output Coupled Video Line Driver
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. DaVinci is a trademark of Texas Instruments. All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.