552AM000270DG

Function:	Enable/Disable
Current - Supply (Disable) (Max):	75mA
Package / Case:	6-SMD, No Lead
Height:	0.071" (1.80mm)
Size / Dimension:	0.276" L x 0.197" W (7.00mm x 5.00mm)
Current - Supply (Max):	130mA
Operating Temperature:	-40°C ~ 85°C
Frequency Stability:	±20ppm
Voltage - Supply:	3.3V
Output:	LVPECL
Series:	Si552
Frequency - Output 4:	--
Frequency - Output 3:	--
Frequency - Output 2:	148.5MHz
Frequency - Output 1:	148.351648MHz
Type:	VCXO
Base Resonator:	Crystal
Part Status:	Active
Packaging:	Tray

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Pin Configurable/Selectable OscillatorsPin configurable/selectable oscillators are electronic circuits that combine two, three, or four frequency control techniques - resistive, capacitive, crystal, and oven - in a single package. The 552AM000270DG is an example of such a device, and its application field and working principle can help explain how pin configurable/selectable oscillators operate in general.The 552AM000270DG is a quad-controlled oscillator with an integrated oscillator, which is ideal for applications in baseband data converters, audio applications, power management systems, and radio frequency systems. It features adjustable frequency control (AFC) technology, which combines resistive, capacitive, and crystal frequency control for precise frequency control over the full available frequency range. The AFC circuit uses both common and differential voltage control of the oscillator\'s output frequency, allowing the user to adjust the frequency with a single pin.When using the 552AM000270DG, an external crystal oscillator controls the primary oscillation frequency of the device. The external crystal oscillator provides a stable and adjustable frequency reference for the crystal oscillator in the 552AM000270DG. The AFC circuit determines the frequency output of the device by adjusting the capacitance of the ceramic resonator and the resistance of the internal crystal oscillator.In addition to the integrated AFC circuit, the 552AM000270DG also features an oven-controlled oscillator (OCXO). This circuit uses a temperature-compensated crystal oscillator (TCXO) mounted in an oven to provide a more stable frequency than the AFC circuit. The OCXO also provides a frequency adjustment range of up to 450 ppm that is independent of voltage and temperature. The 552AM000270DG also features a frequency multiplier circuit that is used to adjust the output frequency. The multiplier circuit takes the input signal from the AFC and the OCXO and multiplies the frequency by 1 to 16 times. This feature allows the user to adjust the frequency output of the device without changing the crystal reference frequency.Finally, the 552AM000270DG also includes a voltage-controlled oscillator (VCO). This is the final control circuit in the device, and it is used to provide smaller and more accurate frequency adjustments. The VCO circuit is connected to the AFC and the OCXO, and adjusts the output frequency in small increments by changing the applied voltage.Overall, the 552AM000270DG pin configurable/selectable oscillator combines all these frequency control techniques and circuits into a single package. It provides precise frequency control over the full available frequency range, two frequency adjustment techniques, an oven-controlled oscillator, and a voltage-controlled oscillator. This makes the 552AM000270DG an excellent choice for applications requiring accurate and reliable frequency control.

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