石英晶体专家PETERMANN彼得曼技术公司的产品范围包括SMD石英晶体具有非常低的阻力，用于极其快速和可靠的振荡启动。这些是石英晶体SMD03025/4（采用3.2x2.5毫米/4焊盘陶瓷外壳）和SMD02016/4（采用2.0x1.6毫米/4焊盘陶瓷外壳）系列等。在我们广泛的在线测试过程中，我们总是发现被测振荡器级的负输入电阻非常低，因此IC与IC之间存在非常大的色散。但是应用程序必须变得越来越小，这意味着开发工程师必须依赖小型石英晶体外壳。

然而，与较大外壳中相同频率的SMD石英晶体相比，较小外壳中的SMD石英晶体具有更高的电阻，并且由于其更高的电阻，在振荡器级中振荡更慢且更不稳定。例如，标准频率为32MHz的低ESR石英晶体的ESR通常为6欧姆（SMD03025/4系列）或15欧姆（SMD02016/4系列）石英晶体谐振器。在无线电应用中，这些32MHz低ESR石英晶体能够实现非常快速和极其可靠的振荡性能，这意味着适当的无线电应用能够在规定的占空比内以最佳和极高的能效进行传输。两种石英晶体系列均可提供频率公差为<25°C时为10ppm，温度稳定性为10ppm @-20/+70°C、15ppm @-40/+85°C、30ppm @-40/+105°C或50ppm @-40/+125°C .当然，汽车版（AECQ200）也可以提供两种陶瓷外壳。3.2x2.5毫米石英的频谱在基频范围内为8–80兆赫。SMD2016/4系列石英晶体2.0x1.6mm石英可在20–64MHz的频率范围内获得。采用3.2x2.5mm陶瓷外壳的SMD03025/4系列石英是世界上最具成本效益的石英晶体系列之一。在3.2x2.5mm陶瓷外壳太大的应用中。

PETERMANN-TECHNIK的专家建议使用SMD2016/4系列的紧凑型2.0x1.6mm陶瓷外壳版本。这种外壳与3.2x2.5mm贴片晶振外壳同时开发，是另一种大容量外壳，也可以非常经济高效地获得。可用于超声波焊接外壳的型号在两个系列中都有。当然，电阻降低的32.768kHz石英晶体也可用于彼得曼技术公司的产品系列。除了极具成本效益的高质量产品之外，彼得曼技术公司还因其综合设计并且大型系列支持超过20年。PETERMANN-TECHNIK GmbH的座右铭是从一个来源提供所有产品，以便我们的客户能够在极短的时间内进入市场。

PETERMANN低ESR石英SMD03025/426.000MHz10/10/0+70/12pF用于快速振荡启动

The product range from the quartz crystals specialists PETERMANN-TECHNIK includes SMD quartz crystals with very low resistance for extremely rapid and reliable oscillation start-up. These are the SMD03025/4 (in 3.2 x 2.5 mm/4 pad ceramic housing) and SMD02016/4 (in 2.0 x 1.6 mm/4 pad ceramic housing) series, among others. During the course of our extensive in-circuit tests, we always find that the negative input resistances for the tested oscillator stages are very low and there are then very large dispersions from IC to IC. But the applications must become smaller and smaller, meaning that the development engineers have to rely on small quartz crystal housings. However, SMD quartz crystals in smaller housings have a higher resistance in comparison with SMD quartz crystals of the same frequency in larger housings and, owing to their higher resistances, oscillate more slowly and less stably in the oscillator stage. For example, the LOW ESR quartz crystals with a standard frequency of 32 MHz typically have an ESR of 6 Ohm, (SMD03025/4 series) or 15 Ohm (SMD02016/4 series). For use in radio applications, these 32 MHz LOW ESR quartz crystals enable a very rapid and extremely reliable oscillation performance, meaning that the appropriate radio applications are able to transmit optimally and with extremely good energy efficiency, within the specified duty cycles. Both quartz crystal series can be delivered with a frequency tolerance of <±10 ppm at 25 °C and temperature stabilities of ±10 ppm @ -20/+70 °C, ±15 ppm @ -40/+85 °C, ±30 ppm @ -40/+105 °C, or ±50 ppm @ -40/+125 °C. Of course, automotive versions (AECQ200) can also be delivered in both ceramic housings. The frequency spectrum of 3.2 x 2.5 mm quartz is 8 – 80 MHz in the fundamental range. The 2.0 x 1.6 mm quartz of the SMD2016/4 series can be obtained in a frequency range of 20 – 64 MHz. The quartz of the SMD03025/4 series in a 3.2 x 2.5 mm ceramic housing is one of the most cost-effective series of quartz crystals in the world. In applications for which the 3.2 x 2.5 mm ceramic housing is too big, the specialists at PETERMANN-TECHNIK recommend using the compact 2.0 x 1.6 mm ceramic housing version from the SMD2016/4 series. This housing was developed simultaneously with the 3.2 x 2.5 mm housing as another high-volume housing and can also be obtained very cost-effectively. Versions which can be used in ultrasound-welded housings are available in both series. Of course, reduced resistance 32,768 kHz quartz crystals are also available in the PETERMANN-TECHNIK product range. In addition to very cost-effective, high-quality products, PETERMANN-TECHNIK has also been known and valued for extremely comprehensive design-in and large series support for more than 20 years. The PETERMANN-TECHNIK GmbH motto is to offer everything from one source so that our customers can achieve a very short time-to-market.