1FEATURES

• 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

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.