Some engineers may think that the electrical performance of military-grade crystals must be better than civilian-grade crystals, which is actually a beautiful misunderstanding, the actual application of military-grade crystals, in addition to some of the limitations of the indicators on the requirements of the very demanding, conventional frequency accuracy is often not as high as that of civilian-grade crystals.
The main differences between the different levels of crystals are:
01 Operating temperature and temperature frequency difference
02 Reliability (stability, anti-interference)
03 Anti-vibration shock performance
04 Recognized standards
05 Manufacturing process
Their specific characteristics are:
1, civilian Level crystal: operating temperature range of -10-60 ℃ / -20-70 ℃, the chip is mainly domestic, good stability, mass production, low cost, fast delivery, generally used in the more sensitive to the cost and stability requirements are not too high on the toys, small household appliances, consumer electronics (electronic market neutral printing) Products are mostly such)
2, industrial-grade crystal oscillator: operating temperature range of -30-85 ℃/-40-85 ℃, the chip is mainly imported, the stability is higher than the civil grade crystal oscillator, has a strong anti-vibration performance, to achieve the industrial use of the standard site, the cost is higher, the delivery speed is faster, is widely used in industrial Control panels, automotive electronics, medical equipment, various instruments and other electronic products that are susceptible to external instability, relatively poor or difficult to locate the working environment (such products are generally not in stock, need to be produced on demand).
3, automotive grade crystal: operating temperature range of -40-105 ℃ / -40-125 ℃, its main performance with the industrial grade crystal is almost the same, the difference is close to the automotive engine near the control panel on the operating temperature and shock level requirements are more stringent, the requirements of the crystal manufacturers must be through the TS16949 system certification, while the car navigation, Bluetooth and other requirements are relatively less stringent, after all, does not affect the driving safety (such products are generally not in stock, need to be produced on demand).
4, military grade crystal: operating temperature range of -40-150 ℃ / -55-155 ℃, the stability requirements are extremely high, to achieve the military GJB field use standards, the delivery cycle is longer, mainly used in various types of weapons and military equipment control systems, most of the cases in order to ensure the quality of each crystal oscillator have to carry out a long time reliability test or even extreme destructive test, so the cost is very high (such products are generally no stock, need to be produced according to the requirements of the requirements are very demanding, but the dosage is not large). If you need a detailed understanding of the automotive grade crystal oscillator has the indicators please visit This article from five aspects of the details of the automotive grade crystal oscillator has five important indicators.
? It should be noted that the military grade is mainly reflected in the limit indicators, but the power consumption is often higher than commercial and civilian. In addition, also reflected in the workmanship. Not a car to use to the hard requirements of the electronic products specified car specification level, according to the report, a car used to the quartz crystal oscillator up to 200 or so, they are distributed in different parts of the car. Want to engine engine parts of the crystal operating temperature requirements are extremely strict, the operating temperature must meet -40-125 ℃, or -40-150 ℃; audio, navigation and other systems on the operating temperature range is not a very high index, -40-85 ℃, or -40-105 ℃ can be met. The system is not a very high specification for the operating temperature range, -40-85℃, or -40-105℃ can be satisfied.
I believe that after the introduction of the above we have a clearer understanding of the differences between civilian-grade crystals, industrial-grade crystals, automotive-grade crystals, military-grade crystals, and characteristics, in the selection of the crystal first to be clear about the positioning of their own products, not the higher the better the level, the appropriate can be.
Japanese manufacturers with an early start in the quartz frequency components industry, the advantages of a deep foundation, a high degree of visibility in the market, and in the high-end product line has a high market share. The vast majority of Japanese crystal manufacturers have a history of hundreds of years, so for the field of automotive grade crystals, Japanese manufacturers still have a certain advantage, which is mainly these manufacturers in the crystal has a long history of development, some even more than 100 years of development time. At the same time Japanese manufacturers in the car above the application, but also has a very big advantage. "A car with up to 70 pieces of crystal oscillator, and is a high-price products are mainly. This has a close relationship with the Japanese automobile industry is developed. In addition in the quartz watch, which is also basically the world of Japanese manufacturers. Japan's Murata, Japan's Omi crystal, Japan's NDK crystal, Japan's Kyocera crystal, Japan's KDS crystal are automotive grade crystal leaders.
Guangrui Tai advantages
Guangrui Tai electronics is a professional engaged in passive crystal and active crystal stock supplier, stock brand set of Japan's NDK crystal, KDS crystal, Murata crystal, Kyocera crystal, Nishitetsujyo crystal, Seiko crystal, Daikawa crystal, Epson crystal as well as the Taiwan's Hung Hsing crystal, TXC crystal, Gagao crystal, TST crystal, and the United States of America! ABRCOM crystals, SITIME crystals and other well-known crystal brands in many countries, we have electronic components industry senior technical staff and enthusiastic and responsive sales staff to ensure that your work efficiency during the work. If you need help in selecting automotive grade crystals, please feel free to contact us! Official Website