IN TIME WITH ALL-SILICON OSCILLATORS

The silicon oscillators offer developers and supply chain managers everything that a modern component must be able to do today. Extreme versatility, extreme robustness and longevity with an MTBF of more than 500 million hours, extreme accuracy paired with very small housings and very favourable prices. The silicon oscillators from PETERMANN-TECHNIK are direct drop-in replacements of quartz oscillators and can even be used without PCB redesign. In addition to the cost savings, the user benefits from the 30 times longer service life as well as the higher shock and vibration resistance, which make his application significantly more fail-safe. The revolutionary ultra-low-power 32.768 kHz XOs and TCXOs with housing designs of 1.5 x 0.8 mm and 2.0 x 1.6 mm score points with an extremely low power consumption of less than 1 µA and are available with stabilities from ±5 ppm in the temperature range from -40 °C to +85 °C. By reducing the amplitudes, the power consumption can be further reduced and perfectly adapted to the application. Due to the very low power consumption, the ULPOs and ULPPOs available in the VDD range from 1.2 to 3.63 VDC are very suitable for use in battery-powered applications such as IoT, wearable, GPS, RTCs, µP clocking, smart metering, smart housing, smartphones, tablets, health and wellness monitors, sports video cameras, wireless keyboards, industrial (also for high ambient temperatures), embedded computing, consumer products, automotive, and many more. Minimised power consumption The standard low-power XOs (LPO Series) in the frequency range from 0.2 to 137 MHz are also characterised by very low prices, very low power consumption, very precise standard frequency stabilities of ±20 ppm at -40/+85 °C and excellent jitter values. The EMI behaviour of an LPO is 54 times better than that of a comparable quartz oscillator. The LPOs, which are available in the VDD range from 1.5 to 3.63 VDC, have a current consumption of 4.8 mA at 137 MHz. A quartz-based XO requires around 40 mA under comparable conditions. In the range from 1 to 110 MHz, LPOs only require 3.4 mA and are also available with a power-saving stuffing function. In stand-by mode, the power consumption of the LPOs available in the standard housings (2.0 x 1.6; 2.5 x 2.0; 3.2 x 2.5; 5.0 x 3.2 and 7.0 x 5.0 mm) is only 0.6 µA. For new designs, PETERMANN-TECHNIK suggests the use of LPOs in 2.0 x 1.6 mm or 2.5 x 2.0 mm housings, as these housings are significantly cheaper than quartz oscillators of the same size, or quartz oscillators in the larger ceramic housings with 5.0 x 3.2 mm or 7.0 x 5.0 mm. In addition, cross-uses with other oscillator versions can be created in these housings (e.g. low-power oscillator with spread-spectrum low-power oscillator) without having to create a new layout. One oscillator, two frequencies No problem with the highly innovative LPO-2 series. The LPO-2 series can output two frequencies in the frequency range from 1 to 110 MHz, which can be called up via the frequency selection pin. The selectable output frequencies are F0 (main frequency) or a divided frequency of the main frequency. The split frequencies F0/2, F0/3, F0/4 or F0/8 can be generated from F0. For example, 50/25 MHz for Ethernet, 24.576/12.288 MHz for audio, 54/27 MHz for video, 66/33 MHz for CPU or 48/24/12 MHz for USB applications. The ageing is ±1 ppm after the first year and is therefore at TCXO level. The standard stability is ±20 ppm above -20/+70°C, or ±25 ppm above -40/+85°C. It goes without saying that the jitter values of 0.8 ps are the best in the industry. With the LPO-2, the very simple multiple use of an oscillator with two different frequencies can save considerable development, qualification, component, procurement and infrastructure costs. Extremely low frequency drift The Silicon Oscillator Technology product range also includes the UPO series (low cost ultra performance oscillator) and the HTLPO series (high temperature). In the temperature range from -40°C to 125 °C, these oscillators offer an extremely low frequency drift of ±20 ppm; the automotive-compatible AECQ100 versions even offer ±25 ppm over the temperature range from -55 °C to 125 °C. These accuracy classes are not possible with conventionally manufactured clock crystal oscillators. The reliability of the silicon oscillators is also 30 times higher than that of quartz oscillators. From PETERMANN-TECHNIK's point of view, more and more oscillators with very high accuracy in very small housings will be used, especially in areas such as "Infortainment Systems", "In-Vehicle Networking", "Collision Detection" and "Gear Control". In addition to the extremely high shock and vibration resistance and the very low frequency stability values, the very favourable prices are not only of interest to automotive customers. Oscillators for networking and computing PETERMANN-TECHNIK's Silicon Oscillator Technology also sets new standards for differential XOs, VCXOs and VCTCXOs. Samples and small batches of the versions available in LVPECL and LVDS versions in the frequency range from 1 to 800 MHz can be delivered within one day. What's more, these oscillators also have excellent frequency stability of ±10 ppm in the temperature range from 0 °C to 70 °C and ±15 ppm in the temperature range from -40 °C to 85 °C. The jitter values are extremely low at 0.3 ps and are ideally suited for use in 10GB Ethernet in accordance with IEEE802.3-2005 and telecommunications applications, among others. The ageing of ±5 ppm after 10 years is below that of a TCXO based on quartz. This makes these oscillators suitable for applications such as networking and computing, server and storage applications, SONET, SATA, SAS, PCI Express, routers, fully buffered DIMM and fibre optic products. Samples and small batches in this area can also be delivered within one day. Broad frequency spectrum The VCXOs are characterised by a very broad frequency spectrum from 1.0 to 625 MHz with pull ranges of up to ±1600 ppm. Frequency stabilities from ±10 ppm to ±50 ppm over -40/+85 °C can be selected, the long-term ageing is ±5 ppm after 10 years. The VCXOs are also designed for excellent jitter performance, maximum variability, extreme robustness and very favourable prices, just like the VCTCXOs and the Stratum 3 oscillators. Spread spectrum oscillators The Silicon Oscillator Technology product range is rounded off by low-power, high-performance spread spectrum oscillators (LPSSO series) in the standard frequency range from 1 to 220 MHz. The centre spread ranges from ±0.125 - ±2.0 % and the down spread from -0.25 to -4 %, so that the SSPOs can be used in telecommunications applications, scanners, printers, copiers, interface controllers, graphics cards, PCIs, CPUs, set-top boxes, LC displays and all other EMC-critical applications. The VDD range is 1.8 to 3.63 VDC. The spread spectrum oscillators are available in housings from 2.5 x 2.0 mm to 7.0 x 5.0 mm, whereby the 2.5 x 2.0 mm housing is recommended for new developments due to its very favourable price. Switchable spread The spread can also be switched off on some versions. The frequency stability without spread is ±25 ppm over -40/+85°C paired with a very low cycle-to-cycle jitter of 30 ps. The developer therefore has the option of switching on a defined spread. This significantly reduces development, component, storage and procurement costs, as the same oscillator can be used in a wide range of customer applications - with or without a spread. Like all other products in the silicon oscillator product range, the spread spectrum oscillator product group also offers almost unlimited application possibilities. Sampling and small series within one day Not only are a large number of frequencies available from stock in different housings, the production deadlines of 3 - 5 weeks for all products are also within a very tight time frame. Samples and small series of ULPOs and ULPPOs with 32,768 kHz, LPOs, UPOs, HPTLPOs, VCXOs, LPSSOs, differential oscillators, etc., can be dispatched on the same day the order is placed. Why quartz replacement? A 2.0 x 1.6 mm2 low-cost silicon oscillator can clock several ICs simultaneously. It has frequency stabilities of ±20 ppm maximum over -40 to +85 °C and ±25 ppm maximum over -55 to +125 °C in the frequency range from 1 to 220 MHz. A quartz does not! A 2.0 x 1.6 mm crystal is available from 20 MHz, in a 2.5 x 2.0 mm housing only from 12 MHz. Depending on the housing and frequency, these mini SMD crystals have resistances of 250 to 60 ohms (12 to 64 MHz). The application engineers at PETERMANN-TECHNIK very often find from the daily customer circuit analyses that the negative input resistances of the oscillator stages to be clocked are not large enough to achieve sufficient transient response safety with these very small, high-impedance crystals. Automotive customers even demand a safety factor of >10! Even in non-automotive applications, it is no longer possible to achieve sufficiently high safety factors with very small quartz crystals due to the very high resistances. Furthermore, even a very small crystal still requires at least two external circuit capacitances after GND, if not even an external resistor. All of this requires space on the PCB, which users often simply do not have, or will no longer have in the next miniaturisation stage. A 2.0 x 1.6 mm oscillator requires just 3.2 mm² of PCB space. Nothing more is needed. This solution is extremely flexible, very inexpensive, extremely durable and simply indispensable for the next stage of miniaturisation. Another point to consider is the often very high drive level of >400 µW to 1 mW, or even more. Many users very often do not even realise how high the drive levels in their circuits are, as this value is not easy to measure correctly. These high drive levels extremely overload a small crystal and can drastically reduce the longevity of the crystal. High drive levels are not a problem for a micro oscillator anyway. Simply switch CLK-OUT to XIN of the oscillator stage and you're done. Good advice from a clocking specialist In order to be able to save costs in a variety of ways, it is important to first consider the clocking in a new development. Which ICs should be used, how can they be placed very close to each other so that several ICs can be clocked simultaneously with a micro-oscillator, thus avoiding the multiple use of crystals and crystal oscillators? How can EMC be avoided? The application engineers at PETERMANN-TECHNIK can provide help and advice and immediately present and sample the right product solution to the customer from an extremely broad and deep product portfolio. Based on the highly innovative Silicon Oscillator Technology, PETERMANN-TECHNIK has a very wide product range of different oscillators, such as Ultra Low Power Oscillators, Ultra Performance Low Power Oscillators, High Temperature Low Power Oscillators, Differential XOs, VCXOs and VCTCXOs up to 800 MHz, VCXOs, VCTCXOs, Stratum 3 Oscillators and Spread Spectrum Oscillators. Highly innovative oscillator solutions are available in the frequency range from 1 Hz to 800 MHz in the temperature range from -55 °C to 125 °C, depending on the component. PETERMANN-TECHNIK aims to further expand its position as a specialised partner for frequency-determining components and offer its customers an extremely short time-to-market and a reduction in development, qualification, component, procurement and infrastructure costs thanks to top-quality and extremely innovative products in combination with a very extensive technical service catalogue and price and logistics systems adapted to the supply chain as well as excellent product quality. Further information can be found at: Silicon Oscillators Product Overview Published as a specialist article in elektronik industrie 12/2014 In time with silicon oscillators Technical questions: Phone: 0 81 91 / 30 53 95 E-mail: info@petermann-technik.de