SIT8008ACF2-28E

Frequency Stability:	±20ppm
Current - Supply (Disable) (Max):	4mA
Height:	0.031" (0.79mm)
Size / Dimension:	0.126" L x 0.098" W (3.20mm x 2.50mm)
Package / Case:	4-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	4.5mA
Spread Spectrum Bandwidth:	--
Operating Temperature:	-20°C ~ 70°C
Frequency Stability (Total):	--
Series:	SiT8008
Voltage - Supply:	2.8V
Output:	HCMOS, LVCMOS
Function:	Enable/Disable
Available Frequency Range:	1MHz ~ 110MHz
Programmable Type:	Programmed by Digi-Key (Enter your frequency in Web Order Notes)
Type:	XO (Standard)
Base Resonator:	MEMS
Part Status:	Active
Packaging:	Bulk

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Programmable oscillators are electronic components used to maintain and control a precise oscillation frequency over a wide range of temperatures, voltages and other operational conditions. One example of a programmable oscillator is the SIT8008ACF2-28E, a quartz-based oscillator manufactured by Sitronix. This device provides optimal performance, accuracy and reliability in the most demanding of environments. This article will discuss its application field, as well as its working principles.

The SIT8008ACF2-28E is a voltage-controlled quartz oscillator ideally suited for a wide range of applications including GPS, cellular base stations, computer systems, automotive electronics, and communications systems. Its frequency range is wide, covering 25MHz to 400MHz. It also has an excellent frequency stability over temperature, with a typical variation of 0.8 ppm in the -40°C to +85°C temperature range. The product’s high frequency stability and accuracy are its main advantages, allowing it to maintain a precise frequency over temperature, voltage, and operating conditions. The SIT8008ACF2-28E also offers excellent multi-mode operation and noise immunity, making it ideal for a variety of applications.

The SIT8008ACF2-28E obtains its precise frequency control and stability through the use of a quartz crystal. Quartz crystal oscillators work by creating an oscillation circuit using quartz crystal as the oscillating element in an electronic circuit. The crystal responds to an electrical voltage, creating a harmonic mechanical vibration at a specific frequency. The oscillations are generated and sustained by an external electronic circuit. The oscillator circuit helps to maintain the vibration at a fixed frequency.

The SIT8008ACF2-28E consists of a voltage-controlled oscillator (VCO) integrated circuit, the quartz crystal resonator, a buffer amplifier and a frequency divider. The frequency divider connects the VCO to the quartz crystal, acting as a buffer. The buffer amplifier increases the impedance between the VCO and the crystal, allowing for a more stable and precise frequency output. The crystal is held in place by a mounting bracket, which also helps to ensure thermal stability. The VCO provides the oscillation frequency output and is connected to an external control voltage, which can be adjusted to change and adjust the frequency output.

The SIT8008ACF2-28E is able to maintain these precise frequency levels over a wide range of temperatures, voltages, and other operating conditions due to its integrated temperature compensation circuitry. This helps to ensure that the frequency value remains substantially unaffected by temperature and voltage fluctuations. The device also features a low phase noise, low jitter, and high acquisition and frequency stability, making it ideal for a variety of programming applications.

In conclusion, the SIT8008ACF2-28E is a highly reliable and accurate programmable oscillator, capable of providing precise frequency control and stability in a wide range of applications. Its quartz crystal construction and integrated temperature compensation circuitry make it perfect for applications requiring high frequency accuracy and stability over temperature, voltage and other operational conditions. Its wide frequency range makes it ideal for applications such as GPS, cellular base stations, computer systems, automotive electronics, and communications systems.

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