TDA827X Datasheet, PDF (3/4 Pages) NXP Semiconductors – Silicon Tuner Family

PC TV applications
With the launch of the new Windows XP media center, the market for TV
reception on PCs is booming. In comparison with STB designs, significantly
higher levels of integration are required for PC TV solutions. With their
high level of integration, Philips’ silicon tuners are ideal for this market
and also enable new applications in the PC world such as integration
into notebooks and laptops. In addition, they offer the possibility to build
applications with dual or triple tuner functions for PVR systems or multiple
channel recorders.
Philips has two complete reference designs tailored specifically for PC TV
applications. The first is based on the TDA8275, a silicon tuner developed
specifically for this market, in conjunction with the brand new TDA8290
multi-standard IF demodulator. With this chipset, PC and notebook
manufacturers have access to an ultra compact front end able to handle
all terrestrial analogue standards (NTSC/PAL/SECAM) outputting a
conventional CVBS and Sound IF output. Based on an IP developed for
cable modems, the TDA8275 implements the RSSI function, which is a
fast measurement system of a selected channel. This function allows, by
S/W control, a fast scanning of the whole TV band, an automatic selection
of a given input power and the elimination of poor or far away transmitters.
Unwanted channels will be then blanked to blue screen. Thus the installation
process can be drastically shortened (an advantage for portable notebook
based applications).
The second is a full reference design for PCI card manufacturers.
It combines the TDA8275 and TDA8290 with the SAA7133 video decoder
and PCI bridge IC. This full chipset and reference design allows PCI card
manufacturers to go rapidly to market with a single ultra competitive card
able to cope with all analogue TV standards.
Front end reference design
Key features
• High level of integration allow multiple tuner applications
and notebook implementation
• Embedded loop through for PVR applications
• Multi-standard solution programmable by software
(no need to change tuner from one region to another)
• Power level indicators allow very fast band scanning
• Cost effective system solution compared to conventional
CAN approach
• Low profile (size 50 x 120 mm) possible for PCI board
PCI card reference design
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