CDCVF857RTBT

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Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

The CDCVF857RTBT frequency synthesizer is an integrated, programmable, mixed-signal PLL device that is suitable for a variety of timing and synchronous applications. It integrates a high-performance clock generator, a wide-bandwidth variable-frequency PLL, and a configurable voltage-controlled oscillator (VCO) with high-drive output stages in a single chip. The CDCVF857RTBT is capable of providing clock frequencies from MHz to GHz ranges for most consumer applications, such as in wireless communications, automotive systems and computer motherboards. This makes it an ideal choice for a variety of synchronous systems.

The CDCVF857RTBT employs a two-stage PLL, with an analog-controlled voltage-variable oscillator and a digital-controlled frequency-locked loop. The PLL accepts reference and feedback clock frequencies to generate a precise frequency output. The analog control voltage is generated by a digital-controlled oscillator, which compares the reference and feedback frequencies and adjusts the control voltage until the PLL is locked to the reference frequency. The data rate of the output is then determined by the reference frequency, as opposed to the feedback frequency.

The CDCVF857RTBT also incorporates an on-chip frequency programming interface that supports I2C, SPI, serial and parallel bus interfaces. The interface is designed to minimize device power consumption, reduce the complexity and cost of external components and support a wide range of system applications. In order to ensure the proper operation of the PLL, the phase detector is integrated with an automatic gain control (AGC) circuit.

The CDCVF857RTBT is designed to be robust and reliable. The integrated circuits are optimized for low power consumption and high operating stability, making them ideal for a range of applications where reliability is important. Additionally, all pins have ESD protection, and conformal coating is available on some packages. As such, this device is a reliable, cost-effective choice for timing and synchronous applications.

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