Triple Video Amp with Integrated Filters and HV Sync Capability

The THS7327 integrates three analog video channels and two digital channels for HV sync, greatly simplifying systems design and reducing component count. The three analog 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 analog signal conditioning requirements for implementation of the following standards, while eliminating the need for more than 20 external components:

* 9-MHz filter for SDTV video including CVBS, S-Video and 480i/576i
* 16-MHz filter for EDTV 480p/576p and VGA signals
* 35-MHz filter for HDTV 720p/1080i and SVGA signals
* 75-MHz filter for HDTV 1080p and XGA/SXGA signals
* For UXGA/QXGA RGB signals, the filters can be bypassed to provide 500-MHz bandwidth and 1150-V/?s slew rate amplifiers to buffer the signals

Each analog channel with an integrated programmable filter provides a unity gain buffer for input into a video decoder or video analog-to-digital converter (ADC) and a separate path without a filter for monitor pass-through. The monitor pass-through includes a 6-dB gain output buffer with SAG correction capability, bandwidth of 500-MHz and slew rate of 1300-V/ ?s. Manufactured in TI's proprietary BiCom3 complementary bipolar silicon germanium process, the THS7327 offers 2.7-V to 5-V single-supply
operation, which results in power savings of up to 50 percent by eliminating the negative supply required by traditional designs.

The THS7327 device joins TI's extensive offering of high-performance analog and digital signal processor (DSP) products for video applications, including DaVinciTM processors optimized for digital video systems, the TVP7000/1 triple 8/10-bit video ADC, and DLPR technology.