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Enhanced ST CATV demodulator lowers BOM

Posted: 02 Mar 2007 ?? ?Print Version ?Bookmark and Share

Keywords:ADC? cable TV? demodulator? ST? QAM?

STV0297E QAM CATV demodulator from ST

STMicroelectronics (ST) has announced new enhancements to its STV0297 cable TV demodulator. The STV0297E QAM demodulator delivers performance improvements that reduce demands on other elements in the reception chain, thereby lowering BOM costs for manufacturers.

Near-perfect reception
In addition, the new QAM demodulator promises near-perfect reception even on degraded networks. It inherits all the functionality of the STV0279D and embeds new features such as four I?C addresses for PVR applications and Transport Stream Multiplexing Frame (TSMF) capability to support the Japanese market.

With high Quasi Error Free (QEF) performance, improved echo cancellation capability and good phase noise immunity, the STV0279E enables manufacturers to produce lower-cost STB solutions with more robust performance by using a lower cost tuner and other circuits. BOM cost is further reduced by the on-chip 12bit ADC and the adjacent channel filter, which provides efficient immunity to out-of-band disturbance.

An extended complex equalizer provides approximately 100 feed-forward and feed-backward taps to allow correction of strong and long echoes. A dedicated phase noise cancellation block has also been introduced. In addition, a Forward Error Correction (FEC) block covering ITU-T annex A and C provides a serial or parallel bit stream. The STV0297E interfaces directly to any MPEG 2/4 decoder.

Cost-effective solution
The demodulator's small footprint, low power consumption and high performance, coupled with the ability to reduce the cost of other system components, make the STV0279E a cost-effective cable TV solution. Its application-oriented digital features, controlled via the I?C interface, enable the design of high-quality systems. Particular attention has been paid to application issues, with the demodulator providing outputs such as RF and IF AGC and noise-free I?C bus for tuner control, to simplify the design of high-quality application boards. It is supported by a full evaluation package and a detailed Network Interface Module (NIM) reference design.

The STV0279E is currently available in volume in a 10-by-10mm TQFP64 package priced at $3 in quantities of 10,000 units.

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