SIT9005ACU1G-28DJ

Frequency Stability:	±20ppm, ±25ppm, ±50ppm
Height:	0.030" (0.76mm)
Size / Dimension:	0.098" L x 0.079" W (2.50mm x 2.00mm)
Package / Case:	4-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	6.5mA
Spread Spectrum Bandwidth:	-2.62%, Down Spread
Operating Temperature:	-20°C ~ 70°C
Frequency Stability (Total):	--
Series:	SIT9005
Voltage - Supply:	2.8V
Output:	LVCMOS
Function:	--
Available Frequency Range:	1MHz ~ 141MHz
Programmable Type:	Programmed by Digi-Key (Enter your frequency in Web Order Notes)
Type:	SSXO
Base Resonator:	MEMS
Part Status:	Active

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Programmable Oscillators

Programmable oscillators are electronic circuits, mainly used in electronic systems, whose oscillation frequency can be controlled by one or more inputs. They are widely used in communications, industrial control and automation. The SIT9005ACU1G-28DJ is designed for microwave, satellite and terrestrial communications applications. It is a two-input programmable oscillator with a frequency range from 800MHz to 2.8GHz and a wide tuning range from 5.625 to 40MHz. It is suitable for high-performance applications such as frequency synthesisers and tunable filters.

Principle of Operation

The SIT9005ACU1G-28DJ operates on the principle of varactor-switched frequency synthesiser. It consists of a voltage-controlled oscillator (VCO), a reference oscillator, a phase-locked loop (PLL) and a driver circuit. The VCO generates the output frequency, which is controlled by a control voltage. The reference oscillator generates a reference signal, which is compared with the PLL output signal and is used to regulate the frequency of the output signal. The output frequency is determined by the control voltage, which is the output of the PLL. The PLL controls the control voltage based on the input signal. The input signal is a two-frequency signal, one is an input frequency and the other is a modulation frequency. The input frequency is the reference signal for the VCO and the modulation frequency determines the output frequency of the PLL.

Application Fields

The SIT9005ACU1G-28DJ is especially suited for satellite and terrestrial communications applications. It can be used for precise frequency synthesis and control of output frequency. It is designed for frequency hops, channel switching and frequency hopping. Its low power consumption and fast frequency selection makes it suitable for many system designs. In addition, the SIT9005ACU1G-28DJ has a wide tuning range, which means it can be used in many other applications including frequency synthesizers, tunable filters, radio modulation, signal processing and signal source control. Its high stability and fast frequency switching make it an ideal choice for signal processing and communications applications.

Conclusion

The SIT9005ACU1G-28DJ is a two-input programmable oscillator with a wide frequency range from 800MHz to 2.8GHz and a wide tuning range from 5.625 to 40MHz. It operates on the principle of varactor-switched frequency synthesiser. It is designed for microwave, satellite and terrestrial communications applications and is suitable for applications such as frequency synthesisers and tunable filters. It is also suitable for frequency hops, channel switching and frequency hopping. The SIT9005ACU1G-28DJ is an ideal choice for many system designs due to its low power consumption and fast frequency selection.

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