SIT9005ACA1G-25SH

Frequency Stability (Total):	--
Current - Supply (Disable) (Max):	4.3µA
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:	-2.1%, Down Spread
Operating Temperature:	-20°C ~ 70°C
Series:	SIT9005
Frequency Stability:	±20ppm, ±25ppm, ±50ppm
Voltage - Supply:	2.5V
Output:	LVCMOS
Function:	Standby
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 a form of oscillator circuit in which multiple electrical frequency is generated with a high degree of accuracy and stability when prompted with a digital control. One of the most popular programmable oscillators is the SIT9005ACA1G-25SH. It has a wide variety of applications and working principles, which make it a very reliable piece of electronic hardware for both professionals and hobbyists alike.

Applications

The SIT9005ACA1G-25SH is mainly used in the aerospace, automotive, industrial and telecommunications industries. In particular, it is especially useful in satellite ground station applications, due to its wide frequency tuning range, high output power and reliable performance. Additionally, the SIT9005ACA1G-25SH also sees application in fields involving instrumentation, satellite navigation, and wireless-network architecture. In military and defense systems, the SIT9005ACA1G-25SH can be used to detect and locate threats, by emitting an electromagnetic wave travelling through the air that reflects off the object in question. Through the knowledge of electromagnetic reflections, aircraft can be tracked and detected. This in turn helps in forming an effective defensive system or creating an early warning radar. The SIT9005ACA1G-25SH is also used in weather forecasts. By deploying it with a set of satellite dishes, communications between two remote points can be established with zero interruption. Furthermore, by using directional antennas, it can be used to measure slight changes in High Frequency (HF) and Ultra High Frequency (UHF) signals to generate an in-depth analysis of the atmosphere and climate.

Working Principle

The SIT9005ACA1G-25SH works on a single crystal oscillator chip and a built-in programmable logic device (PLD). In this setup, the PLD is filled with electrons which are then arranged by the user to carry out specific predetermined functions. The PLD is triggered when a certain electrical frequency is emitted, which generates a set output frequency.The circuit of the SIT9005ACA1G-25SH consists of two primary elements; a crystal oscillator array and a series of capacitors. The crystal oscillator array is made up of 16 individual quartz crystals. It opens up a wide range of frequencies from the low-end to the high-end of the tuned spectrum. The capacitors connected to the crystal which are then adjusted according to the desired frequency. In order to change the output frequency of the SIT9005ACA1G-25SH, two parameters can be altered; the crystal oscillator array or the series of capacitors. Changing the crystal oscillator array will result in immediate change in output frequency. Alterations in the capacitor series on the other hand result in slow, incremental changes in the output frequency. The frequency can also be fine-tuned by altering parameters such as the combination frequency, bias current, and external capacitance.

Conclusion

The SIT9005ACA1G-25SH is a robust and reliable piece of programmable oscillator circuit that can be used in a wide variety of applications. It has a wide range of tuning capability and a high output power which makes it a viable choice for professionals and hobbyists alike. Because of its ease-of-use and flexibility, the SIT9005ACA1G-25SH is an ideal choice for applications in aerospace, automotive, industrial, and telecommunications.

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