7W-27.000MAB-T Crystals, Oscillators, Resonators

Frequency Stability:	±50ppm
Current - Supply (Disable) (Max):	--
Height - Seated (Max):	0.056" (1.42mm)
Size / Dimension:	0.276" L x 0.197" W (7.00mm x 5.00mm)
Package / Case:	4-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	20mA
Operating Temperature:	-10°C ~ 70°C
Series:	7W
Voltage - Supply:	5V
Output:	CMOS
Function:	Enable/Disable
Frequency:	27MHz
Type:	XO (Standard)
Base Resonator:	Crystal
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Oscillators

Oscillators are electronic circuits that have the ability to generate periodic alternating signals. They are crucial components of almost any electronic application, offering a wide range of audio and radio frequencies. One such type of oscillator is the 7W-27.000MAB-T, a low-phase-noise synthesizer intended for use in a number of mobile and military communication systems.

Design and Functionality

The 7W-27.000MAB-T oscillator is a voltage-controlled oscillator (VCO) that operates at a frequency of 27.000 MHz. It is designed with a low-noise output and is capable of producing a wide frequency range of 0.35 MHz to 27 MHz. This wide frequency range is achieved by a single crystalline substrate and is ideal for applications such as frequency synthesizers and phase-locked loops (PLLs).The 7W-27.000MAB-T oscillator is designed to produce a signal with low phase noise. This is achieved by using a low-noise linear amplifier and a loop filter configuration. This filter helps maintain a stable amplitude and frequency characteristics of the generated signal over a wide temperature range. The oscillator can also support additional tuning steps of 10 kHz, if the need arises.

Application Field and Working Principle

The 7W-27.000MAB-T oscillator is used for a number of low-phase-noise applications. These applications include IS-95 and cdma2000 mobile wireless communication networks, GPS navigation systems, various military and industrial communication systems, and satellite communication systems.The working principle of the oscillator is based on the concept of frequency synthesis. This is a process in which an input frequency is divided by a set of factors to obtain an output frequency. By modifying the value of the divider, the output frequency can be changed. In the case of the 7W-27.000MAB-T oscillator, the frequency is generated by a phase-locked loop (PLL) system.The PLL system is a closed-loop system that is composed of the VCO, phase detector and loop filter. The input frequency is compared against the signal from the VCO using the phase detector. If there is any difference in the two signals, the phase detector will produce an error signal which is then fed to the loop filter. The loop filter is designed to filter out the high-frequency components and modify the frequency until the two signals are in phase. This mechanism is what enables the VCO to produce a stable signal at the desired frequency.

Conclusion

The 7W-27.000MAB-T oscillator is a low-phase-noise synthesizer designed for use in various wireless communication systems. It is capable of producing a wide range of frequencies and is highly stable over a wide operating temperature range. Its working principle is based on the concept of frequency synthesis, where an input frequency is changed by a set of factors. By making use of the PLL system, the oscillator is able to generate a signal with low phase noise.

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