石英晶體專家PETERMANN彼得曼技術公司的產品范圍包括SMD石英晶體具有非常低的阻力，用于極其快速和可靠的振蕩啟動。這些是石英晶體SMD03025/4（采用3.2x2.5毫米/4焊盤陶瓷外殼）和SMD02016/4（采用2.0x1.6毫米/4焊盤陶瓷外殼）系列等。在我們廣泛的在線測試過程中，我們總是發現被測振蕩器級的負輸入電阻非常低，因此IC與IC之間存在非常大的色散。但是應用程序必須變得越來越小，這意味著開發工程師必須依賴小型石英晶體外殼。

然而，與較大外殼中相同頻率的SMD石英晶體相比，較小外殼中的SMD石英晶體具有更高的電阻，并且由于其更高的電阻，在振蕩器級中振蕩更慢且更不穩定。例如，標準頻率為32MHz的低ESR石英晶體的ESR通常為6歐姆（SMD03025/4系列）或15歐姆（SMD02016/4系列）石英晶體諧振器。在無線電應用中，這些32MHz低ESR石英晶體能夠實現非常快速和極其可靠的振蕩性能，這意味著適當的無線電應用能夠在規定的占空比內以最佳和極高的能效進行傳輸。兩種石英晶體系列均可提供頻率公差為<25°C時為10ppm，溫度穩定性為10ppm @-20/+70°C、15ppm @-40/+85°C、30ppm @-40/+105°C或50ppm @-40/+125°C .當然，汽車版（AECQ200）也可以提供兩種陶瓷外殼。3.2x2.5毫米石英的頻譜在基頻范圍內為8–80兆赫。SMD2016/4系列石英晶體2.0x1.6mm石英可在20–64MHz的頻率范圍內獲得。采用3.2x2.5mm陶瓷外殼的SMD03025/4系列石英是世界上最具成本效益的石英晶體系列之一。在3.2x2.5mm陶瓷外殼太大的應用中。

PETERMANN-TECHNIK的專家建議使用SMD2016/4系列的緊湊型2.0x1.6mm陶瓷外殼版本。這種外殼與3.2x2.5mm貼片晶振外殼同時開發，是另一種大容量外殼，也可以非常經濟高效地獲得。可用于超聲波焊接外殼的型號在兩個系列中都有。當然，電阻降低的32.768kHz石英晶體也可用于彼得曼技術公司的產品系列。除了極具成本效益的高質量產品之外，彼得曼技術公司還因其綜合設計并且大型系列支持超過20年。PETERMANN-TECHNIK GmbH的座右銘是從一個來源提供所有產品，以便我們的客戶能夠在極短的時間內進入市場。

PETERMANN低ESR石英SMD03025/426.000MHz10/10/0+70/12pF用于快速振蕩啟動

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.