FN2500183

Frequency Stability:	±25ppm
Current - Supply (Disable) (Max):	10µA
Height - Seated (Max):	0.071" (1.80mm)
Size / Dimension:	0.276" L x 0.197" W (7.00mm x 5.00mm)
Package / Case:	4-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	15mA
Operating Temperature:	-20°C ~ 70°C
Series:	SaRonix-eCera™ FN
Voltage - Supply:	3.3V
Output:	CMOS
Function:	Enable/Disable
Frequency:	25.001MHz
Type:	XO (Standard)
Base Resonator:	Crystal
Part Status:	Active
Packaging:	Bulk

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FN2500183 Oscillator Application Field and Working Principle

Oscillators are electronic circuits that generate continuous, repeated signals at a precise frequency—such as sine, triangle, square, and sawtooth waves. Oscillators are often found in applications that require repetitive signals, such as radio and television broadcasting, telecommunications, instrumentation, and many industrial and scientific uses.Among oscillators, the FN2500183 is a silicon CMOS voltage-controlled oscillator (VCO). It is intended for use as a local oscillator or frequency synthesis circuits. Generally speaking, the FN2500183 oscillator operates from 400 to 2600MHz and achieve a resolution of 1kHz. The phase noise is up to -136dBc/Hz at 1kHz offset in 1800MHz~2200MHz. The input voltage range is 2.0V–3.3V, the operating temperature from -40°C to 85°C. The power dissipation is lower than 12.9mW @ 3.3V.

Operating principle of the FN2500183 oscillator

Voltage-controlled oscillators (VCOs) are oscillator circuits used to produce a signal with a frequency directly proportional to the voltage applied to its control input. In other words, when a positive voltage is applied to a VCO’s control input, the oscillator’s frequency will increase and when a negative voltage is applied the frequency will decrease. In general, the operating principle of the FN2500183 comprises two major steps. The first step is tuning the frequency of the VCO by applying an appropriate reference voltage to the VDD pin. This is done by connecting an external voltage-controlled capacitor to the VDD pin of the IC. The voltage of the capacitor changes with respect to the external reference voltage applied to the capacitor and the frequency of the oscillator signal changes accordingly.The second step is to filter the output signal. Typically, a parallel resonator is connected from the output pin of the IC to ground to filter out any unwanted noise from the output signal. The parallel resonator consists of an inductor (L) and capacitor (C). It then works as a Low-Pass filter and allows only the desired frequency range to pass through and reject the unnecessary frequencies.

FN2500183 oscillator application area

FN2500183 is suitable for RF and microwave applications, such as cellular wireless base station and telecommunications systems, twitters, encrypted radio systems, ISM receivers, and local oscillator and synthesizer circuits in instruments and systems. Its low phase noise performance, wide operating frequency range, nominal operating voltage, and CMOS process ensures a low cost and high performance solution for frequency synthesis. Furthermore, it is used in various communication systems that transmit signals in the UHF and VHF ranges. It is also used for satellite communication and passive tracking equipment. Also, it is used for military and medical applications. In addition, the FN2500183 is used in high-frequency radio applications such as radio broadcasting, TV broadcasting, and many other uses. The oscillator provides a sinusoidal output signal to the antenna, which is then modulated with the audio or video signal.

Conclusion

The FN2500183 oscillator is a reliable and cost-effective solution for applications that require a wide range of operating frequency and low phase noise. The oscillator is a CMOS voltage-controlled oscillator, operating from 400 to 2600MHz, with an input voltage range of 2.0V–3.3V and power dissipation of less than 12.9mW. Furthermore, it is used in various communications applications from cellular network base stations to radio broadcasting systems. It also has applications in military and medical applications. The oscillator is therefore a reliable and cost-effective solution for frequency synthesis applications.

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