Crystals: 7A-28.63636MAAE-T Application Field and Working Principle

Crystals are a fundamental component in many of the signal processing applications used today, including wireless communication systems, radar and electronic navigation. This article will look at one kind of crystal which has become popular in these areas: the 7A-28.63636MAAE-T crystal. Specifically, this article will discuss its application field as well as its working principle.

Application Field

The 7A-28.63636MAAE-T crystal is an auto-tuning fundamental crystal that features wide frequency range and stability of -0.1 to + 0.3 ppm over 10 years life at 25°C. It has high shock resistance and excellent temperature characteristics over its wide operating temperature range from -40 to +85°C. Its small size is also a major factor in its popularity. These qualities make it well-suited for applications where high performance, small size, and excellent temperature characteristics are required.

The 7A-28.63636MAAE-T crystal is used in a wide range of applications across the signal processing field, including mobile phone systems, satellite communication systems, vehicle navigation and tracking systems, remote sensing systems, and industrial automation. It is also used in the medical and avionic sectors, typically as a frequency reference for timing and synchronization. Its popularity is largely attributed to its wide range of operating frequencies, wide frequency band tuning range, and small size.

Working Principle

A crystal works by converting electrical energy into electrical vibrational energy and then back into electrical energy. This energy conversion is based on the piezoelectric effect, which occurs when two opposite surfaces of a crystal are subjected to electrical and mechanical stresses. This energy conversion causes the crystal to vibrate at a certain frequency, and the frequency of this vibration is determined by the material and size of the crystal.

The 7A-28.63636MAAE-T crystal, in particular, stands out for its wide frequency range and stability of -0.1 to + 0.3 ppm over 10 years life at 25°C. This is due in part to its design, which consists of a thin layer of quartz between two thin gold electrodes. This structure allows for greater control over the vibration frequency and allows the crystal to be tuned to a wide range of frequencies. In addition, the thin metal electrodes also provide better shock resistance and better thermal shock characteristics.

Conclusion

The 7A-28.63636MAAE-T crystal is an auto-tuning crystal that is widely used in signal processing applications requiring high performance, small size, and excellent temperature characteristics. Its wide frequency range and stability of -0.1 to + 0.3 ppm over 10 years life at 25°C is due in part to its design, which consists of a thin layer of quartz between two thin gold electrodes. This makes it a reliable and cost-effective option for many different applications.