Frequency Stability:	±20ppm
Current - Supply (Disable) (Max):	10µA
Height:	0.031" (0.79mm)
Size / Dimension:	0.197" L x 0.126" W (5.00mm x 3.20mm)
Package / Case:	4-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	31mA
Spread Spectrum Bandwidth:	--
Operating Temperature:	-20°C ~ 70°C
Frequency Stability (Total):	--
Series:	SiT8208
Voltage - Supply:	1.8V
Output:	LVCMOS, LVTTL
Function:	Standby
Available Frequency Range:	1MHz ~ 80MHz
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 circuit oscillators with programmable frequency and phase characteristics. They are mostly used in phase-locked loop (PLL) applications, time stamping applications and timing applications. The SIT8208AC-3-18S is a programmable oscillator designed for high frequency applications with excellent phase noise performance. This article looks at the application field and working principle of the SIT8208AC-3-18S.

Application Field of SIT8208AC-3-18S

The SIT8208AC-3-18S is an efficient programmable oscillator for high frequency applications. Its low phase noise and wide frequency range make it ideal for high frequency timing, synchronization and PLL applications. It is suitable for use with digital existing and analog PLLs. It is also used in satellite and terrestrial communication radiowave transmission systems, test equipment, multi-channel noise & distortion analyzers, and fibre-optic systems. The SIT8208AC-3-18S is also used in digital communication systems, military systems, and radars.

Working Principle of SIT8208AC-3-18S

The SIT8208AC-3-18S programmable oscillator comprises of an on-chip programmable frequency synthesizer and phase-lock loop (PLL) circuits, integrated into a single chip. The PLL utilizes an on-chip voltage-controlled oscillator (VCO) and a high-accuracy frequency divider to generate a programmable output frequency with an output frequency range of 60 MHz to 1 GHz. The PLL also has a built-in PFD loop bandwidth control, which can be fine tuned using external components. This helps boost PLL performance at input frequencies. The integrated combination ensures a low phase noise output, which is further improved with optional on-chip noise-reduction techniques. An internal or external reference oscillators can be used to achieve the highest accuracy for the best PLL frequency locking range.The SIT8208AC-3-18S also features an on-chip programmable charge pump for precise output power control up to + 3 dBm. The PLL also features an on-chip adjustment circuitry for temperature compensation. The combination of these features ensures the highest accuracy and stability of the output frequency.

Conclusion

In conclusion, the SIT8208AC-3-18S is an ideal programmable oscillator for high frequency applications. Its built-in PLL and frequency divider help produce a programmable output frequency with an output frequency range of 60 MHz to 1 GHz. Its low phase noise and wide frequency range make it ideal for high frequency applications such as satellite and terrestrial communication radiowave transmission systems, test equipment, and multi-channel noise & distortion analyzers. Additionally, the integrated charge pump and temperature compensation circuitry allows for precise output power control and frequency stability.

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