353VB5I283R

Frequency Stability:	±25ppm
Current - Supply (Disable) (Max):	--
Height - Seated (Max):	0.055" (1.40mm)
Size / Dimension:	0.197" L x 0.126" W (5.00mm x 3.20mm)
Package / Case:	6-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	25mA
Operating Temperature:	-40°C ~ 85°C
Series:	353
Voltage - Supply:	3.3V
Output:	HCMOS
Function:	Enable/Disable
Frequency:	28.375MHz
Type:	VCXO
Base Resonator:	Crystal
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Overview of Oscillators

Oscillators are electronic devices whose single purpose is to generate a continuous frequency or signal with a certain amount of voltage and current. From the smallest watch to the largest scientific instrument, oscillators form the basis of most applications. Oscillators are essential in many applications, including radio and television, scientific and medical instrumentation, computers, military systems, and measurement systems.

353VB5I283R Application Field and Working Principle

The 353VB5I283R is a versatile, highly configurable oscillator designed for a wide variety of applications. It is capable of outputting triangular, saw-tooth, and square waveforms, and a loadable rectified sine wave. The 353VB5I283R is ideal for applications such as frequency-locked loops, radars, radio communication systems, audio processing, generator-based electronics, signal generation and sampling, and clock synchronization.The 353VB5I283R is based on a phase-locked loop (PLL) architecture, which consists of two distinct stages: a voltage controlled oscillator (VCO) and a phase frequency detector (PFD). The PLL is a closed-loop control system and its purpose is to ensure that the frequency of the output signal remains constant regardless of environmental or load changes. The PLL works by comparing the output frequency generated by the VCO to an input signal generated by the PFD and then correcting any discrepancies by adjusting the VCO frequency. The VCO stage is the core of the PLL architecture and is responsible for producing the output signal. The VCO consists of an oscillator core, a voltage regulator, and a frequency divider. The frequency of the output signal is determined by the input voltage, which is controlled by the voltage regulator. The PFD then compares the output signal to an external reference signal and generates an error signal which is used by the voltage regulator to adjust the VCO frequency accordingly.The PFD stage is responsible for comparing the output frequency to an external reference signal and comprises a phase detector, a charge pump and a loop filter. The phase detector converts the difference between the two signals to a voltage and the charge pump amplifies the resulting error signal. Finally, the loop filter is a low-pass filter that removes any high frequency noise from the error signal before it is used to control the VCO.In the 353VB5I283R oscillator, a synchronization module is also included to ensure that the frequency of the output signal is accurately locked to the reference frequency. The synchronization module is similar in function to a phase comparator, but uses separate pins for both the input and reference signals and compares them with each other in order to generate the error signal. This ensures that any discrepancies between the two signals can be efficiently corrected and the output signal remains in sync with the reference.

Conclusion

The 353VB5I283R is a highly configurable oscillator capable of outputting a variety of waveforms, making it suitable for a wide range of applications. It utilizes a PLL architecture to ensure that the frequency of the output signal is accurately maintained even in the presence of environmental or load changes. The synchronization module is also included to ensure that the output signal is locked to a reference frequency. For these reasons, the 353VB5I283R is a reliable and versatile solution for many oscillator-dependent applications.

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