CDCE906PWG4

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The CDCE906PWG4 is a clock generator, PLL, and frequency synthesizer from Texas Instruments. It’s a low-power device designed to help innovators quickly and easily develop more complex, time-sensitive applications with fewer components. The device is made of Silicon and is robust in design to ensure its longevity and stability. Thanks to its feature set, it can help reduce system cost, improve system performance, and conserve power.

The CDCE906PWG4 is a highly integrated device, which allows the user to combine features such as frequency synthesis, clock and data recovery, differentially buffers and dividers into a single device. This can result in several applications including IF sampling circuits, NF scanning receivers, timing and jitter analysis, clock buffering/dividing/distributing, RF synchronization and harmonic noise suppression systems.

The CDCE906PWG4 is a cost-effective and efficient solution for hard-to-implement applications that require the utmost precision in timing and frequency tracking. It features an integrated frequency synthesizer and an 8-bit programmable reference clock input frequency range of 10 MHz to 32 MHz. The very low-phase noise VCO helps reduce system noise and improves overall performance. The device can output frequencies from 8 kHz to 3.2 GHz with unparalleled timing accuracy, making it ideal for applications like cable modem/DSL systems, routers and gateways, time-multiplex/channelized digital video, sound, and CATV systems, and even frequency hopping radios.

The CDCE906PWG4’s working principle is based on the phase-locked loop (PLL) principle. This circuit uses an input reference clock to track and generate one or more accurately timed output clocks. The device compares the phase and/or frequency of the input reference clock with its internal VCO output clock, adjusts and locks the VCO output clock to the frequency of the input reference clock, eventually providing output clocks tracking the frequency and phase of the input reference clock.

The device features a phase-locked loop (PLL) with a fractional-N frequency synthesizer and a VCO library structure. The PLL has a charge pump current of 400 µA and uses a standard single-loop, leading negate architecture. This allows for excellent isolation between the reference oscillator and VCO, as well as an extremely wide loop gain throughout the locked state every time the device is powered up, resulting in faster lock-in and greater dynamic performance.

The PLL synthesizer has an output frequency range from 8 kHz to 3.2 GHz. The synthesizer has on-chip linear and non-linear dividers, as well as programmable dividers allowing for high-speed and low-jitter clock outputs. The frequency multiplication ratio of the synthesizer can be controlled over a wide range. The device also features several post-PLL paths and phase-aligned outputs for convenience.

The CDCE906PWG4 also integrates Clock Data Recovery (CDR) for communication interface applications. It generates transmit clock through a 1:4 standard x4 clock multiplier and source synchronization. The circuit supports half-rate communications, high-speed x4 clock and signal synthesis and signal regenerations, as well as multiple input data signal synchronization. The device has an input data bandwidth of 3.5 to 5.2 Gbps and covers transmission signal types such as SONET/SDH, RAID, Fibre Channel and OC-192, providing clean and continuous output clock frequency with minimal jitter.

In summary, the CDCE906PWG4 is a versatile, highly integrated low-power frequency generator and synthesizer solution ideal for a variety of timing, synchronization and clock requirements in high-speed communication and data processing applications. With a wide selection of features and robust performance, the CDCE906PWG4 can help users quickly and easly develop more complex, time-sensitive systems while reducing power consumption and cost.

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