550BG155M520DG

Frequency Stability:	±20ppm
Current - Supply (Disable) (Max):	75mA
Height - Seated (Max):	0.071" (1.80mm)
Size / Dimension:	0.276" L x 0.197" W (7.00mm x 5.00mm)
Package / Case:	6-SMD, No Lead
Mounting Type:	Surface Mount
Ratings:	--
Current - Supply (Max):	108mA
Operating Temperature:	-40°C ~ 85°C
Absolute Pull Range (APR):	±375ppm
Series:	Si550
Voltage - Supply:	3.3V
Output:	LVDS
Function:	Enable/Disable
Frequency:	155.52MHz
Type:	VCXO
Base Resonator:	Crystal
Part Status:	Active
Packaging:	Strip

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Oscillators

Oscillators are a type of electrical circuit that produces a periodic, repeating signal. They are commonly used in mobile communications and computer systems, and are used in many general applications. The 550BG155M520DG oscillator is a voltage-controlled oscillator (VCO) that is designed for cellular and GSM applications. It has a wide frequency range, low power consumption, low noise level, high efficiency, and low temperature coefficient. This article discusses the application field and working principle of the 550BG155M520DG oscillator.

Application Field

The 550BG155M520DG oscillator is a high-performance chip designed for GSM, CDMA, LTE, iDEN, TDMA, and Bluetooth communication systems. It can operate over a wide temperature range, from -40°C to +85°C. This oscillator is also suitable for applications such as frequency hopping and modulation circuits. It is available in a variety of packages, such as plastic QFN, 4mmX4mm SO, and TSOP-8 packages, and is compliant with RoHS standards.

Working Principle

The 550BG155M520DG oscillator operates on a voltage-controlled oscillator (VCO) architecture. It is controlled by an input voltage signal, which determines the frequency of the output signal. The oscillator is composed of several components: an amplifier, a phase-locked loop (PLL), and an oscillator block. The amplifier is used to amplify the input signal and drive the PLL, while the PLL converts the input signal into an output signal with a constant frequency. The oscillator block generates the output signal by modulating the PLL output.The VCO behavior depends upon several factors, such as the strength of the input signal, the frequency of operation, and the amount of thermal noise in the system. The 550BG155M520DG oscillator uses an on-chip temperature compensation system to reduce the effect of thermal noise. It also features a low-noise amplifier to minimize the stability issues associated with wide-bandwidth circuits.

Conclusion

The 550BG155M520DG oscillator is a high-performance VCO designed for GSM, CDMA, LTE, iDEN, TDMA, and Bluetooth communication systems. It has a wide operating temperature range, low power consumption, low noise level, high efficiency, and low temperature coefficient. The oscillator operates on a voltage-controlled architecture, and is composed of an amplifier, a phase-locked loop (PLL), and an oscillator block. The on-chip temperature compensation system and low-noise amplifier reduce the effect of thermal noise and minimize stability issues associated with wide-bandwidth circuits.

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