7M-24.000MEFC-T

Crystals are important components in many electronics applications, such as radios, amplifiers, computers, and many other communications systems, and they need to be carefully chosen and specified to best support the particular application. The 7M-24.000MEFC-T is one such quartz crystal, designed for an especially tough application. A brief description of the application field and working principle of the crystal follows.

Application Field

The 7M-24.000MEFC-T is a small, thick-film type quartz crystal manufactured by Ecliptek Corporation, and is intended for use in high temperature and/or harsh environment applications. The crystal is ideal for Frequency Inverter (FI) drive applications and can operate at temperatures ranging from -30 to +125 degrees Celsius. One common application is for the control of motor speed in a motors drive control system.

This series of crystal is especially designed for use in motor drive systems operating at high temperatures, as the crystal temperature coefficient of frequency (TCF) is only -0.046 ppm/ Celsius, as compared to a typical quartz crystal TCF of approximately -2.2 ppm/ Celsius. This small TCF guarantees that the frequency of the crystal will remain extremely stable over temperature, and allows for precise frequency control in high temperature applications.

Working Principle

Quartz crystals typically operate on the piezoelectric effect. As an electrical signal is applied to the crystal and it changes shape, an oscillation produces a vibrating signal within the crystal lattice that can be used to generate a precise output frequency. This process is reversible, as well; by altering the shape of the quartz crystal, an electrical signal is generated with a frequency that matches the crystal’s inherent resonance.

The 7M-24.000MEFC-T quartz crystal incorporates a temperature compensated element that reduces the crystal’s TCF to just -0.046 ppm/ Celsius. This ensures that the crystal’s frequency remains nearly constant despite fluctuations in temperature, which makes this model especially suited for high temperature applications.

Conclusion

The 7M-24.000MEFC-T is a special type of quartz crystal manufactured for high temperature or harsh environment applications. Its small TCF of -0.046 ppm/ Celsius ensures that the frequency of the crystal is stable over a wide temperature range. Its ability to generate precise output frequencies makes this crystal well suited for use in Frequency Inverter drive systems and other applications that require precise frequency control.