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[经验] 是时候解决汽车要求

2018-10-30 14:25:30  366 digikey 电动汽车 传感器
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电子市场一直是汽车行业的一员。
现在,由于自动和电动汽车处于许多汽车制造商设计时间轴的最前沿,电子元件的需求增加,同时仍然保持最严格的质量和可靠性标准。
SiT2024 / 25汽车合格振荡器
超越处理器
许多熟悉这些应用中正在实施的技术的工程师都了解高可靠性处理器,传感器和无线通信产品。
牢记这一点,汽车设计中的沉默英雄经常是计时产品。
符合汽车要求的定时产品符合严格的AEC-Q100资格,并且有充分的理由。
如果定时产品无法保持其严格的公差,则处理器和传感器将存在很大的操作问题。
在汽车应用的情况下,这可以意味着处理器不按设计将数据从传感器传送到系统,这可能导致电路中的意外操作。
在设计阶段,这意味着调整和测试以纠正异常操作。
不幸的是,当人类成为乘客时,如果系统在8月份的亚利桑那州高速公路或1月份的明尼苏达州后沿道路上没有按照设计运行,那么后果实际上可能是生死攸关。
石英或MEMs
在这种情况下,许多基于石英的定时解决方案都无法进行切割。
替代方案是基于MEMS(微机电系统)的解决方案。
基于MEMS的定时产品的主要供应商之一是Sitime,可通过Digi-Key Electronics获得。
SiTime开发了SiT2024 / 25系列MEMS振荡器,专门针对汽车行业的严格要求。
SiTime汽车振荡器信息图表
为此,SiT2024 / 25振荡器专为符合ASIL(汽车安全完整性等级)的汽车应用而设计。
您的应用程序是高级驾驶员辅助系统(ADAS),车载以太网还是电子控制单元(ECU);
SiTime的汽车振荡器的稳健性比石英振荡器强30倍。
SiT2024 / 25系列提供高达137 MHz的高频范围选项,±20 PPM的卓越稳定性以及-55至125°C的极宽温度范围。
此外,这些振荡器还具有业界最佳的振动灵敏度,为0.1 ppb / g,具有50,000 g冲击和70 g抗振性,使其成为汽车引擎盖系统的万无一失的定时解决方案。
抓住汽车行业的机遇,使我们达到了自动化车辆的目的。
话虽如此,在高振动/高温应用中不使用最高质量的汽车(AEC-Q100)合格计时解决方案的风险不仅对设计有害,而且对使用最终产品的潜在客户也是有害的。

以上来自于谷歌翻译


以下为原文

The electronics market has always been a player in the automotive industry. Now, with autonomous and electric vehicles at the forefront of many automotive manufacturers design timelines, electronic components are at an increased demand while still being held to the strictest of quality and reliability standards.
SiT2024/25 Automotive QualIFied Oscillators
Think Beyond Processors
Many engineers familiar with the technology being implemented in these applications are aware of high reliability processors, sensors, and wireless communication products. Keeping that in mind, quite frequently the silent heroes in automotive designs are the timing products. Automotive-qualified timing products adhere to strict AEC-Q100 qualifications, and for good reason. If the timing products can’t maintain their tight tolerances, the processors and sensors will have big operational problems.
In the case of automotive applications this can mean a processor not communicating data from a sensor to the system as designed, which can lead to unexpected operation in a circuit. In the design phase this means tweaking and testing to correct abnormal operation. Unfortunately, when humans are the passengers, if a system does not operate as designed either on an Arizona highway in August or a Minnesota backroad in January, the consequences can literally be life or death.
Quartz or MEMs
In this situation many quartz based timing solutions just don’t make the cut. The alternative is MEMS (Microelectromechanical Systems) based solutions. One of the leading suppliers of MEMS based timing products is SiTime which is available through Digi-Key Electronics. SiTime has developed the SiT2024/25 series of MEMS oscillators specifically targeting the stringent qualifications of the automotive industry.
SiTime Automotive Oscillator Infographic
To that end, the SiT2024/25 oscillators are designed specifically for ASIL (Automotive Safety Integrity Level) compliant automotive applications. Whether your application is an advanced driver assistance system (ADAS), in-vehicle Ethernet, or electronic control unit (ECU); SiTime’s automotive oscillators are 30 times more robust than their quartz based counterparts.
The SiT2024/25 series offers high-frequency range options available up to 137 MHz, superior stability at ±20 PPM, and an extremely wide temperature range of -55 to 125°C. Additionally, these oscillators tout one of the best vibration sensitivities in the industry at 0.1 ppb/g with a 50,000 g shock and 70 g vibration resistance, making them a foolproof timing solution for automotive under-the-hood systems.
Taking chances in the automotive industry is what has brought us to the point of automated vehicles. That being said, the risk of not utilizing the highest quality automotive (AEC-Q100) qualified timing solutions in high vibration/high temperature applications can be detrimental not only to the design, but to prospective customers using your end product.

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