Some engineers may think that the electrical performance of military-grade crystal oscillator must be better than that of civilian-grade crystal oscillator, which is actually a beautiful misunderstanding. In practical application, the military-grade crystal oscillator requires very high limit indexes, and the conventional frequency accuracy is often not as high as that of the civilian-grade crystal oscillator.
The main differences between different levels of crystal oscillators are:
0 1 operating temperature and temperature frequency difference
02 Reliability (stability, anti-interference)
03 Earthquake resistance and impact resistance
04 recognized standard
05 manufacturing process
Their specific characteristics are:
1, civilian-grade crystal oscillator: the working temperature range is-10-60℃/-20-70℃. The chip is mainly made in China, with good stability, low cost and fast delivery speed. It is generally used in toys, small household appliances and consumer electronic products (neutral printing in the electronic market) which are sensitive to cost and have low stability requirements.
2. Industrial-grade crystal oscillator: The working temperature range is -30-85℃/-40-85℃, and the wafers are mainly imported, which is more stable and shockproof than the civilian-grade crystal oscillator, reaching the industrial field use standard, with higher cost and faster delivery speed. Widely used in industrial control panels, automotive electronic equipment, medical equipment, various instruments and meters. These are easily influenced by external unstable factors, which are worse or more difficult.
3. Automobile-grade crystal oscillator: The working temperature range is-40-105℃/-40-125℃, and its main performance is similar to that of industrial-grade crystal oscillator, but the difference is that the control panel near the automobile engine has stricter requirements on working temperature and shock-proof grade, requiring crystal oscillator manufacturers to pass TS 16949 system certification.
4. Military-grade crystal oscillator: The working temperature range is-40-150℃/-55-155℃, which requires extremely high stability, conforms to GJB actual combat standards and has a long delivery time. Mainly used in various weapons and military equipment control systems. In most cases, in order to ensure the quality, each crystal oscillator needs to be tested for a long time, even extremely destructive tests. If you need to know more about the indicators of automobile-grade crystal oscillator, please visit this article and introduce five important indicators of automobile-grade crystal oscillator in detail from five aspects.
? It should be noted that the military grade is mainly reflected in the limit index, but the power consumption is often higher than that of commercial and civil use. In addition, it is also reflected in the workmanship. It doesn't mean that all electronic products used in cars have to specify the scale level. According to the report, a car uses about 200 crystal oscillators, which are distributed in different parts of the car. The working temperature of crystal oscillator is very strict in engine parts, and it must be -40- 125℃ or -40- 150℃. Audio, navigation and other systems do not have high requirements for the working temperature range, and -40-85℃ or -40- 105℃ can meet them.
I believe that after the above introduction, you have a clear understanding of the differences and characteristics of civilian-grade crystal oscillators, industrial-grade crystal oscillators, automobile-grade crystal oscillators and military-grade crystal oscillators. When choosing a crystal oscillator, you must first know the positioning of your product, not the higher the level, the better.
With the advantages of early start and deep foundation in the timely frequency component industry, Japanese manufacturers enjoy a high reputation in the market and occupy a high market share in high-end product lines. The vast majority of Japanese crystal oscillator manufacturers have a history of hundreds of years, so Japanese manufacturers still have certain advantages in the field of automobile-grade crystal oscillators, mainly because these manufacturers have a long development history in crystal oscillators, and some even have a development time of more than 100 years. At the same time, Japanese manufacturers also have great advantages in the application of automobiles. "The crystal vibration of a car can reach 70 pieces, and it is mainly a high-priced product. This is closely related to the development of Japanese automobile industry. In addition, on quartz watches, this is basically the world of Japanese manufacturers. Murata, Dahe crystal oscillator, NDK crystal oscillator, Kyocera crystal oscillator and KDS crystal oscillator are all leaders of automobile crystal oscillator.
Guangruitai Advantage
Guangruitai Electronics Co., Ltd. is a spot supplier specializing in the production of passive crystal oscillators and active crystal oscillators. Spot brands include Japanese NDK crystal oscillator, KDS crystal oscillator, Murata crystal oscillator, Kyocera crystal oscillator, Citizen crystal oscillator, Seiko crystal oscillator, Dahe crystal oscillator, Epson crystal oscillator, Taiwan Province Hongxing crystal oscillator, TXC crystal oscillator, heightening crystal oscillator, TST crystal oscillator, and American ABRCOM crystal oscillator and SITIME crystal oscillator. If you need help to choose the crystal oscillator of automobile level gauge, please contact us! official website