8V40817QG

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The 8V40817QG is a voltage-controlled crystal oscillator (VCXO) part of the Clock/Timing family of integrated circuits, specifically in the category of Clock Generators, PLLs, Frequency Synthesizers. It is a low-jitter, high-frequency timing source designed to generate frequencies at 3.2GHz and above, while also providing highly accurate frequency and phase control.

The 8V40817QG consists of a programmable VCXO, a low-phase-noise differential output amplifier, and a PLL loop filter. The integrated VCXO core is internally tuned for operation up to 900 MHz with an optional external tuning to enable operation up to 3.2GHz. The low-noise differential output amplifier provides the output clock signal with superior harmonic and jitter performance, even at higher frequencies.

Applications of the 8V40817QG include various high-speed communications such as 10G/25G/40G Ethernet, memory controller interfaces, high performance clocking and data converters, PCIE Gen 1/2/3 clock synthesis, optical modules, and backplanes. This device is especially suitable for applications where high accuracy frequency synthesis and low jitter performance must be maintained, such as test and measurement systems, storage systems, high-end audio systems and embedded applications.

The working principle of the 8V40817QG involves a combination of an internal oscillator, an amplifier to boost the signal, and a programmable register used to set the desired frequency. An external reference oscillator, such as a crystal oscillator, feeds into the internal oscillator, enabling the clock generator to produce the desired frequency. The amplified signal is then sent to the programmable register, where it is used to determine the exact frequency output.

The PLL loop filter, connected to the 8V40817QG\'s internal oscillator, allows the user to set the desired oscillator frequency and stability precisely. The PLL loop filter allows different ranges of jitter to be used, ensuring that the 8V40817QG is well-suited for most high-speed communication applications. Similarly, the differential output amplifier ensures that the output signal is clean and highly accurate, improving the overall performance and accuracy of the device.

The 8V40817QG is a low jitter, high-frequency timing source used to generate frequencies at 3.2GHz and above, with excellent accuracy and phase control. Its wide range of applications include 10G/25G/40G Ethernet, memory controller interfaces, data converters, optical modules, storage systems and high-end audio systems. Thanks to its internal oscillator, amplifier, programmable register and PLL loop filter, the 8V40817QG is able to generate the desired frequency output with precision and accuracy.

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