445A2XL20M00000

Crystals have been used for many decades to control radio frequency signals in a variety of applications. A crystal oscillator is a combination of a quartz crystal and an electronic oscillator circuit, and the combination has found usage in an extensive variety of electronic devices. The oscillator circuit provides a constant output signal, and the quartz crystal creates a stable frequency for the device. The 445A2XL20M00000 crystal is an example of a ceramic-encapsulated crystal oscillator used in various high performance applications.

Application Field of 445A2XL20M00000

The 445A2XL20M00000 crystal oscillator is designed to generate over a wide frequency range while also providing excellent electrical and environmental stability. It has custom designed parameters that enable some special applications including timing, slaving, and frequency variations. Some applications of this crystal oscillator are:

• Communication equipment, e.g. telephone systems, mobile phones, routers and switches;
• Instrumentation and control systems, e.g. medical devices, data acquisition systems and process controllers;
• Automotive electronics, e.g. radios, navigation systems and vehicle control systems;
• Industrial equipment, e.g. micro-controllers, computers and sensors;
• Broadcast systems, e.g. television and radio transmitters.

Housed in a TLP-449 package with dimensions of 7.5mm x 5.0 mm x 2.4 mm, this oscillator is suited for space-constrained applications. Additionally, it features an operating temperature range from -40 to +85 °C and has a comprehensive range of supply voltage options. This crystal oscillator offers low jitter and a tight thermal aging specification and is therefore suited for high performance applications.

Working Principle of 445A2XL20M00000

The 445A2XL20M00000 crystal oscillator works on the same principle as other quartz crystal oscillators; by alternately compressing and releasing the crystal it creates a vibrating electrical signal of a specific frequency. Quartz is a piezoelectric material, meaning it generates an electrical signal when mechanically stressed. The opposite is also true: when an alternating electric field is applied it causes the material to systematically expand and contract. The frequency of the vibration is determined by the physical properties of the crystal.

The external oscillator circuit consists of an amplifier and circuitry to create an alternating voltage, which serves to excite the crystal. This alternating voltage deforms the crystal with an amplified alternating electric field, causing it to vibrate at its resonant frequency. A feedback loop from the output of the crystal to the input of the oscillator is then used to amplify the crystal’s output signal. This feedback loop allows for a steady oscillatory output with minimal phase noise and ensures consistence in performance.