NB2308AI3DR2G

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NB2308AI3DR2G is a clock generator, phase locked loop (PLL) frequency synthesizer from Texas Instruments (TI). TI is a company that distributes product solutions in markets such as industrial, automotive, personal electronics, communications and more. This specific product is aimed at high-speed communications applications.

This Clock Generator PLL Frequency Synthesizer is capable of providing up to eight independent outputs that clock frequencies which can range from 4kHz to 4 GHz, over any of the available output formats. The first six of the eight outputs are identical with the outputs having the same frequency and duty cycle. The seventh output is a customizable output with the user being able to choose between LVDS, LVCMOS, or even disable the output. The eighth output is a dedicated reference clock output in LVDS format. The frequency of this output is user-defined, however, it must be a sub-multiple of the synthesized output clock.

Apart from the output formats and frequency range, this specific Frequency Synthesizer provides a wide range of output drive strength and output glitching to the user. Texas Instruments claims that this product has a 4-GHz frequency synthesizer with very low jitter. It also enables multiple applications, such as Wi-Fi, Zigbee, LTE, 40G/100G, Millimeter Wave and PCIe. Also, it comes in a small and low profile package to reduce the overall size of the application. This is supported by a small and cost-effective 10-mm x 5-mm HVQFN48 MR-6 package.

The NB2308AI3DR2G Clock Generator PLL Frequency Synthesizer also has some additional features attached to it. These include the ability to program a high-frequency divided output frequency and some other useful features such as “Spectrum Dither” and “Frequency Slew”. Spectrum Dither provides a user-configurable signal to add signal noise. And frequency slew is a function that smooths out signal output over a certain period of time. This is mainly used to reduce signal noise while maintaining signal integrity.

The NB2308AI3DR2G offers the user further programmability. This includes, but is not limited to, programmable divider ratio, execution time selection, and output offset voltage. It also offers output drive strength support and output glitching. On top of all this, the product offers advanced features, such as auto synchronization, over-burden protection, and daisy-chaining all available output formats.

In terms of the NB2308AI3DR2G working principle, it is based on the PLL (Phase Lock Loop) principle. This allows the output signal from the synthesizer to be in-line with the reference clock signal. The PLL also allows for some local changes in the output frequency, depending on the changes required by the application. This product has a low-noise voltage-controlled oscillator (VCO) that provides the user with clean and linear frequency sweeps. This supports the applications that require wide tuning range. With the VCO, the reference frequency is used to control the output frequency of the system. Finally, the output signal of the synthesizer is then amplified by a low-noise amplifier to its necessary drive capability.

To conclude, the NB2308AI3DR2G is part of TI’s family of Clock Generator Phase Lock Loop Frequency Synthesizers. This product offers the user with a wide range of options including output format, frequency range, drive strength, jitter, power consumption, and more. It is mainly aimed at high speed communications applications. The device works by using a combination of PLL and VCO principles to provide the necessary output frequencies. Finally, it also supports some advanced features that further expand its performance in the targeted applications.

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