89H16NT8BG2ZBHLI8

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Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers has a wide application field with diverse applications depending on the model of the device. The 89H16NT8BG2ZBHLI8 belongs to one family of devices within this domain whose aim is to provide a superior timing stability with its exquisite phase noise, output stability and jitter performance.

This device is a state-of-the-art, low-noise, high-stability clock generator, it uses digital techniques to synthesize a high-precision frequency and delivers it as a single-frequency output signal. It is capable of providing 8 kHz frequency resolution and sub-Hz resolution to select frequencies ranging from 3.2 kHz to 315 MHz. Its ultra-low-noise characteristics allow it to deliver superior performance.

The device has variable accuracy and real-time control of the selected frequency, combined with excellent high-frequency stability. 89H16NT8BG2ZBHLI8 also integrates a spread-spectrum architecture for reduced EMI in high-interference environments, users who prefer to reduce EMI in their system can benefit from this device.

The 89H16NT8BG2ZBHLI8 consists of a high-stability, programmable-gain; voltage-controlled oscillator (VCO), a fractional-N frequency synthesizer, and a control logic circuit built-in (divide-by-N). All three elements are integrated onto one circuit, allowing the user the capability of controlling the output in either the analog or digital domain. The voltage-controlled oscillator (VCO) acts as the converter between the frequency and the control voltage. It receives a control voltage from the user and converts it into an output frequency. The output frequency is then oscillated using the VCO and amplified with the programmable-gain loop before it is delivered.

The fractional-N frequency synthesizer is made up of a reference frequency divider chain and a programmable-division chain. The reference frequency divider chain is used to divide the reference clock frequency down to the desired output frequency. The programmable-division chain is used to divide the reference frequency into another one with the selected fractional ratio. Thus, a fractional-N frequency synthesizer is capable of providing finer frequency control than a conventional frequency synthesizer.

Finally, the control logic circuit built-in, also known as the divide-by-N circuit, allows the user the capability of controlling the output frequency in both the analog and digital domain. It consists of two combinational logic blocks and a rate multiplier that are used to divide the reference frequency and adjust the output frequency within the desired ranges. Integrated within the divide-by-N circuit is a DDS (Digital Direct Synthesis) that is used to generate the output frequency using a direct synthesis technique.

The 89H16NT8BG2ZBHLI8 is therefore a high-precision clock generator, frequency synthesizer and PLL with the capacity to provide excellent output frequency stability and real-time control of the selected frequency with sub-Hz resolution. It is suitable for use in applications that require a reliable, low-noise, high-stability clock generator or clock controller. As such, it is a central element in many systems and provides the ultimate timing stability.

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