Image 2: The block diagram of the RV1805C3 shows the additional functionality available to the engineer when selecting to use a low power all-in-one solution over an in-house timing solution
within the CC6A-T1AH and other extreme components which minimises the stress placed on the crystal blank within the package, even under extreme conditions.
Extreme miniaturisation Miniaturisation has been a long running trend within the frequency market, as it has within the majority of technology markets for many years now, with suppliers beginning to offer quartz components within ultra-miniature 1.2x1.0mm packages. There are many challenges to overcome when creating crystal components at this level of miniaturisation caused by reducing the size of the physical crystal blank. These include an increase in motional resistance, decrease in Q, and an increase in the minimum attainable frequency. The mounting technology within the package must also be updated to ensure optimum crystal performance and reliability within the small package. Our GSX-211 ultra-miniature 1.6x1.2mm package (for high frequencies) and the even smaller CM9V watch crystal with 1.6x1.0mm package crystal both offer cutting edge miniaturisation, ideal for new designs within applications such as wearables.
Extreme precision
At the other end of the size spectrum lies the HCD660, one of the oven controlled oscillators (OCXOs) we offer as a solution when precision is paramount to a design. Particularly favoured by base station designers, the HCD660 offers exceptionally tight temperature stabilities of <1ppb peak- to-peak and aging characteristics of <0.2ppb peak-to-peak per day. Components within these types of projects need to be able to be designed in and then remain stable for years to come with minimal engineering interference. By providing such an exceptional level of long- term stability our OCXOs allow design engineers to build products that will last for generations.
Providing stability in the smallest spaces
Sometimes it’s not enough to just be ultra- miniature or ultra-precise, sometimes your design will need both and that’s an area we’re working on helping to reduce the level of compromise required by the engineer when meeting these demands.
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The GTXO-203 is one of our flagship products for providing high stability within a miniature space, offering exceptional stabilities as good as ±0.5ppm, within an ultra-miniature 2.0x1.6mm package.
First class filtering – crystal filter size reduction and developments within SAW technology Filtering is an integral part of the frequency market and two of the major areas we supply are crystal filters and SAW filters. At the lower end of the frequency spectrum, crystal filters offer the engineer powerful filtering capabilities within miniature packages. In particular, our GSF- 75, a four pole filter, something which would normally be split over two separate packages, is encased within one miniature surface mount package, providing a large amount of space saving for the engineer during board layout and a simpler manufacturing process. At the higher end of the frequency spectrum we offer one of the world’s largest available range of SAW filters and resonators and our in-house SAW frequency experts are often asked for advice on design-ins. Our stock ranges from highly competitive commercial parts priced to ensure minimum budget impact, through to tiny 1.1x0.9mm surface mount components with built in balun functionality. One further noteworthy development within the SAW area is the fusion of SAW filters with low noise amplifiers to produce front end modules. These are highly suitable for use as an all-in-one solution, particularly within the automotive industry, and are available with AEC-Q200 qualification as standard.
Developing into the future Last year Golledge celebrated our 25th anniversary and over the past 25 years we’ve watched technology development drive frequency demands, and in turn seen how frequency developments can allow engineers the freedom they need to further develop more complex and demanding technology. It’s a beneficial cycle for both markets and with we never get tired of finding how each new engineering request can further drive us towards the development the market needs. We look forward to being part of that development for the next 25 years and beyond.
Components in Electronics June 2017 9
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