Product category:
Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2006-) | Subject: THS7327
Edited by the Electronicstalk Editorial
Team on 25 October 2006
Multiformat video amp slashes component
counts
Video amplifier with integrated filters is capable of handling both analogue RGB signals and digital horizontal and vertical (HV) sync signals on a single chip.
Texas Instruments has introduced the first video amplifier with integrated filters that is capable of handling both analogue RGB signals and digital horizontal and vertical (HV) sync signals on a single chip The new device saves up to 80% board space when compared with traditional amplifier solutions for video projectors, professional video, broadcast video, computer display, traditional and digital TV systems
This article was originally published on Electronicstalk on 4 Apr 2006 at 8.00am (UK)
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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.
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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 implementation of the following standards, while eliminating the need for more than 20 external components: 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; 75MHz filter for HDTV 1080p and XGA/SXGA signals; and for UXGA/QXGA RGB signals, the filters can be bypassed to provide 500MHz bandwidth and 1150V/us 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 analogue-to-digital convertor (ADC) and a separate path without a filter for monitor pass-through.
The monitor pass-through includes a 6dB gain output buffer with SAG correction capability, bandwidth of 500MHz and slew rate of 1300V/us.
Manufactured in TI's proprietary BiCom3 complementary bipolar silicon germanium process, the THS7327 offers 2.7 to 5V single-supply operation, which results in power savings of up to 50% by eliminating the negative supply required by traditional designs.
The THS7327 video amplifier is available now in a lead (Pb)-free and RoHS-compliant 48-pin TQFP package from TI and its authorised distributors.
Suggested resale pricing in quantities of 1000 is $3.35.
A complete evaluation module is also available for $199 each.
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