SIT3809AI-D-25EZ

Frequency Stability:	±10ppm
Current - Supply (Disable) (Max):	70µA
Height:	0.039" (1.00mm)
Size / Dimension:	0.276" L x 0.197" W (7.00mm x 5.00mm)
Package / Case:	6-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	36mA
Spread Spectrum Bandwidth:	--
Operating Temperature:	-40°C ~ 85°C
Frequency Stability (Total):	--
Series:	SiT3809
Voltage - Supply:	2.5V
Output:	LVCMOS, LVTTL
Function:	Enable/Disable
Available Frequency Range:	80MHz ~ 220MHz
Programmable Type:	Programmed by Digi-Key (Enter your frequency in Web Order Notes)
Type:	VCXO
Base Resonator:	MEMS
Part Status:	Active
Packaging:	Bulk

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Programmable Oscillators: SIT3809AI-D-25EZ Application Field and Working Principle

Programmable oscillators are electronic components that provide a pulse or clock-like signal and can be programmed for different frequency settings. The SIT3809AI-D-25EZ is a programmable oscillator of this type that is designed for high-precision and high-resolution applications. It is available in surface-mount (SMD), dual-in-line package (DIP) and through-hole (THC) configurations. It also meets the requirements of the electrical industry\'s RoHS2 standard. The SIT3809AI-D-25EZ programmable oscillator combines a precision frequency source, a phase detector and a temperature-compensated voltage-controlled oscillator into a single, exceptionally low-noise device. This design enables it to accurately generate a defined frequency at a given temperature. The oscillator operates from a single +5V supply and has an operating range from 500 kHz to 25 MHz.Among the features of this programmable oscillator are an exceptionally low-jitter output, which allows for improved signal integrity when used for pulse and clock signal generation, and an embedded temperature compensation circuit, which ensures signal stability over a wide temperature range.When used in an embedded system design, the SIT3809AI-D-25EZ can be programmed to provide a signal of the required frequency and phase angle. This feature makes the oscillator suitable for a wide range of applications, including clock and timing signal generation, signal synchronization, signal modulation, and frequency synthesis. This programmable oscillator can also be used in high-speed data communications applications, such as Ethernet and Fibre Channel, where its low-jitter output ensures reliable transmission of the data. It can also be used in medical imaging equipment, automotive applications and military systems, where the consistent signal quality and stability are critical.In terms of its working principle, the SIT3809AI-D-25EZ combines a voltage-controlled oscillator, phase-lock loop and a digital control algorithm. The internal circuitry of the oscillator is divided into two main sections: the voltage-controlled oscillator (VCO) and the phase detector. The VCO is responsible for generating the clock signals. Its output is coupled with a variable resistor, which acts as a frequency control. It is also connected to a temperature sensor to monitor the surrounding temperature and adjust the frequency of the output signal accordingly.The phase detector monitors the output frequency and compares it with a reference signal. If the detected signal differs from the reference, it feeds the difference back to the VCO via the frequency control circuit, thus adjusting the frequency of the signal until it matches the reference. As the reference frequency is user-programmable, a wide range of frequencies can be generated. A single purchase of the device also eliminates the need for multiple oscillator components as the same oscillator can be programmed to meet a variety of frequency needs.In conclusion, the SIT3809AI-D-25EZ programmable oscillator offers a convenient and cost-effective solution for a wide range of applications requiring high-precision and high-resolution clocks and timing signals. Its low-jitter output, wide operating range and robust temperature-compensated design make it ideally suited for use in a variety of embedded and communications systems.

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