The new generation of cable silicon tuners from NXP is also the industry’s first to fully integrate 8-kV of ESD protection inside the chip, enhancing robustness and further reducing the number of components required. Together, the integrated zero-power loop-through and ESD protection help to save PCB space in the STB, simplifying layout at the critical RF antenna input section, enabling better RF performance, and bringing down the total of bill of materials (BoM) by approximately US 20 cents.
“The TDA18250A and TDA18260A silicon tuners are the industry’s first to enable zero-power loop-through and integrated ESD protection of 8 kV,” said Luca Lo Coco, director, cable product line, NXP Semiconductors. “Delivering compelling performance advantages while consuming less power – and in a smaller PCB space – the TDA18250A and TDA18260A have been designed from the ground up to be the optimal choice for new cable STB development worldwide.”
As stricter EU Ecodesign requirements go into effect, there is growing awareness among manufacturers and consumers about the importance of minimising standby power consumption. During three hours of daily STB use, the loop-through typically burns through more electricity than the tuner itself. With the TDA18250A and TDA18260A, cable STB power consumption in standby mode is reduced significantly while the loop-through function remains active – even allowing consumers to watch analogue TV without switching on the set-top-box.
By integrating zero-power loop-through into the silicon tuner itself, NXP is introducing a significant innovation without requiring additional discrete components or introducing additional sensitivity and complexity into cable STB design and manufacturing. As a result NXP has been able to enhance the silicon-tuner advantage over traditional can-type tuners in cost-sensitive applications – eliminating the need for costly external components such as LNAs, SAW filters and baluns; enabling smaller form factors; enabling higher system reliability; and reducing total system costs.