2308A-1DCGI8

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2308A-1DCGI8 application field and working principle

2308A-1DCGI8 is a clock generator, PLL, frequency synthesizer that belongs to the Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers product family. It is designed for low phase noise jitter performance applications over the frequency range from 100 MHz to 8.0 GHz.

Overview

The 2308A-1DCGI8 is a low phase noise, low power consumption component which provides low voltage, low power consumption, and low single-sideband phase noise performance. It offers both single and dual output architecture options, with multiple output format levels including LVPECL, LVDS and CMOS. The outputs may be programmed for either DC or AC (on/off) operation.

Features

The 2308A-1DCGI8 is a low noise component with several features that make it desirable in many applications:

• Minimum SSB phase noise performance up to 8GHz
• Very low current consumption: typical: 10mA
• Very low noise floor: typically -100 to -120 dBc/Hz
• Separate power supplies for single and dual output port versions
• Multiple output format options, including LVPECL, LVDS and CMOS
• Programmable DC/AC (on/off) operation

Applications

The 2308A-1DCGI8 is designed for applications requiring low phase noise jitter performance in the frequency range of 100 MHz to 8.0 GHz. It is suitable for telecom clock distribution systems, next generation PON systems, sonar and point-of-sale systems, as well as many other telecommunications, test and measurement and military applications where low power and low phase noise jitter is required.

Working Principle

The 2308A is a fully integrated, frequency synthesizer-based clock generator with embedded microcontroller and programmable memory-based control. The synthesizer core consists of a programmable and static phase-locked loop (PLL) integrated circuit and a differential and/or single-ended varactor-tuned voltage-controlled oscillator (VCO). These components provide the necessary programmability, flexibility and control that allows the 2308A-1DCGI8 to accurately reproduce the frequencies that are programmed into its memory.

The PLL core is designed to generate clocking signals with low phase noise jitter performance. This is accomplished by using a fractional-N frequency synthesizer, which allows for frequency resolution of up to 0.1 Hz or better. The PLL also features a robust control loop that provides superior dynamic range and maximum flexibility in terms of operating conditions.

The 2308A-1DCGI8’s VCO is designed to provide a precise, stable frequency output. The VCO core is composed of a differential varactor-tuned voltage-controlled oscillator with precise linear frequency control. This feature allows the VCO to precisely hold a user-specified frequency within fractions of a Hertz of the specified center frequency.

The microcontroller provides programmability that enables quick and convenient changing of the output frequencies. The embedded control logic can store multiple frequencies and control parameters in memory, allowing the same unit to be used to generate an entire array of clock signals. The user can also program the power-on/power-off output levels, supply voltage and temperature compensation.

The 2308A-1DCGI8 is designed for integration into systems, allowing for a cost-effective solution. It is suitable for a wide range of applications, from telecom clock distribution systems to military and test and measurement applications.

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