445W32G27M00000

Series:	445
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	MHz Crystal
Frequency:	27MHz
Frequency Stability:	±20ppm
Frequency Tolerance:	±30ppm
Load Capacitance:	30pF
ESR (Equivalent Series Resistance):	40 Ohms
Operating Mode:	Fundamental
Operating Temperature:	0°C ~ 50°C
Ratings:	--
Mounting Type:	Surface Mount
Package / Case:	2-SMD, No Lead
Size / Dimension:	0.197" L x 0.126" W (5.00mm x 3.20mm)
Height - Seated (Max):	0.053" (1.35mm)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Crystals: Application Field and Working Principle

Crystals have a wide array of applications today. A variety of materials called “piezoelectric crystals” are especially useful for tasks ranging from frequency control to electromechanical transduction.

What Are Piezoelectric Crystals?

Piezoelectric crystals are special kinds of materials with or without the aid of electric current which, when subjected to mechanical stress, generate a measurable charge on their surface.Piezoelectric crystals are divided into two types: natural and artificial. Natural crystals such as quartz, tourmaline and topaz, have been exploited in technological applications since ancient times. It was not until the 19th century, however, that the phenomenon was truly understood. Today’s artificial piezoelectric crystals are mainly composed of organic materials such as piezopolymers and piezoceramics. These materials have superior characteristics to their natural counterparts and are used in myriad applications.

Application Fields

Piezoelectric crystals are being utilized in a variety of industries. In the medical sector, they are finding applications in ultra-high frequency imaging and medical monitoring equipment. In automotive industries, they are an important component in airbag systems. In instrumentation and measurement applications, they are used in vibration measurements and acoustic sensors. Other applications include fire detection, pressure and force sensing, ultrasonic generators and transducers.

Working Principle

Piezoelectric crystals operate on the principle of converting mechanical strain to electrical charge. When a piezoelectric crystal is placed under strain, it generates a potential difference (voltage) across its ends. This phenomenon is called direct piezoelectric effect. Similarly, when an alternating voltage is applied to a piezoelectric crystal, the crystal expands and contracts along the direction of electric field according to piezoelectric law. This phenomenon is called inverse piezoelectric effect.Piezoelectric crystals come in different forms, including single-crystal, thin-film, and air-gap structures. Single-crystal structures are mainly used in vibration and acoustic transducers. Thin-film structures are used in transducers that require high frequency and large strain. Air-gap structures are primarily used in laser gyroscopes as they provide better linearity and stability.

Conclusion

Piezoelectric crystals are highly versatile materials with a wide range of applications. They are useful for a variety of tasks ranging from frequency control to electromechanical transduction. Their working principle is based on the principles of converting mechanical strain to electrical charge, or the conversion of electric fields to mechanical strain. Piezoelectric crystals come in different forms and are mainly used in transducers, pressure and force sensing, medical monitoring etc.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description