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TI announces 'first' video amp IC with integrated filters

Posted: 01 Nov 2006     Print Version  Bookmark and Share

Keywords:Texas Instruments  TI  THS7327  video amplifier  amp 

Texas Instruments announced that its THS7327 is the industry's first video amplifier IC with integrated filters for handling both analogue RGB and digital horizontal and vertical (HV) sync signals. The chip, designed for video projectors, professional video, broadcast video, computer display, traditional and digital TV systems, claims up to an 80 per cent savings in board space versus traditional amplifier solutions.

Working from a single 2.7-5V supply, the THS7327 integrates three analogue video channels and two digital channels for HV sync, greatly simplifying systems design and reducing component count. The three analogue channels incorporate unity-gain buffering and monitor feed-through paths to handle all standard video formats, including RGB, YPbPr and CVBS. Designers gain flexibility with the amplifier's I²C-programmable functions including integrated two-to-one input multiplexers to enable switching of multiple video sources; fifth-order antialiasing filters to enable use with multiple video standards; and input bias modes including DC, DC plus level shift, AC and AC sync tip clamp to enable interfacing to multiple video sources.

The programmable filters and input bias modes provide all the common analogue signal conditioning requirements for implementing the following standards, while eliminating the need for more than 20 external components. These include a 9MHz filter for SDTV video including CVBS, S-Video and 480i/576i;16MHz filter for EDTV 480p/576p and VGA signals; 35MHz filter for HDTV 720p/1080i and SVGA signals; and 75MHz filter for HDTV 1080p and XGA/SXGA signals. For UXGA/QXGA RGB signals, the filters can be bypassed to provide 500MHz bandwidth and 1150V/µs slew rate amplifiers to buffer the signals.

Each analogue channel, with an integrated programmable filter, provides a unity-gain buffer for input into a video decoder or video ADC and a separate path without a filter for monitor pass-through. The monitor pass-through section includes a 6dB gain output buffer with SAG correction capability, bandwidth of 500MHz and slew rate of 1300V/µs.

The THS7327, available now in Pb-free and RoHS-compliant 48-pin TQFP package, is priced at Rs.154.80 ($3.35) each in 1,000 quantities. A complete evaluation module is also available for Rs.9,195.75 ($199).

- Vince Biancomano

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Related Datasheets
Part Number Description Category
THS7327 3-Ch RGBHV Video Buffer w/I2C Control (Rev. A) Actives - Sensors and Transducers



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