AD9558BCPZ

The AD9558BCPZ is an advanced clock generator built on a high-speed CMOS process, offering high-performance clock generation and fanout to multiple clock outputs. This application specific device offers single or differential output options and advanced features in a wide range of frequency-synthesized and output-packed configurations.

The AD9558BCPZ is highly integrated, utilizing an advanced single-clock-input frequency synthesizer, outputs featuring reverse terminations, LVCMOS outputs, differential outputs, and ECL outputs, as well as an integrated internal frequency synthesizer.

The AD9558BCPZ is used in a wide range of applications, most notably digital video, digital audio, and video-on-demand (VoD). Additionally, it is also suitable for providing multiple clock outputs for a variety of timing and synchronization applications, such as digital radio and microcontrollers. Additionally, it is also ideal for applications requiring high-speed, multi-frequency clock sources.

The AD9558BCPZ’s working principle is based on a simple frequency synthesizer architecture. A reference clock is used to simultaneously generate frequencies at selectable output frequencies. This reference clock can be an input clock or one of the device’s internal voltage-controlled oscillators (VCOs). The reference clock is then multiplied up to the required frequency and divided down to the desired output frequency. The output frequency is adjustable via an external control voltage, and an internal frequency synthesizer provides the reference clock source.

The AD9558BCPZ has five main components: a VCO, a phase-locked-loop (PLL), a loop filter, a frequency divider, and an output logic controller. The VCO is used to generate a high-frequency sinusoidal waveform. The PLL acts as a phase detector and compares the sinusoidal waveform from the VCO to the reference clock. If the difference between the two is more than a certain threshold, the PLL adjusts the VCO frequency to match the reference clock frequency. The loop filter limits the PLL control voltage output and is optimized for stability. The frequency divider is used to divide the frequency output from the PLL and can divide the output by an integer or fraction (e.g., 1/2 or 1/4, etc.). Finally, the output logic controller is used to generate logic signals from the output of the frequency divider. This includes buffering and combining signals in order to generate intermediate output frequencies, or logic signals representing output frequencies.

The AD9558BCPZ offers exceptional performance, low power consumption and offers a wide range of frequency-synthesized configurations. This makes it an ideal choice for providing high-performance, multi-frequency clock sources for a variety of clock and timing applications in the digital video, digital audio, and VoD. markets.