LTC6948IUFD-4#TRPBF

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The LTC6948IUFD-4#TRPBF is a versatile clock generator from Linear Technology designed for high frequency and low jitter applications. Its design has been optimised for a wide range of frequency synthesis potential. The device is able to generate frequencies from 125 kHz up to 1.8 GHz with a typical jitter of 140 femtoseconds.

The device is ideal for applications requiring high flowrate and low jitter. This includes applications in telecommunications, medical imaging, broadcast TV, ATM and satellite communications, as well as networking, datacom and instrumentation equipment.

The LTC6948IUFD-4#TRPBF uses two main synthesis techniques to produce its high performance. This includes a digital frequency synthesizer using a proprietary Digital Signal Processor (DSP) and a programmable loop network.

Digital Frequency Synthesis

The DSP used in the LTC6948IUFD-4#TRPBF is the core of its frequency synthesis region. It uses a variety of digital processing techniques to produce its low jitter. The DSP functions by taking an input frequency and performing calculations on it to produce a new frequency. This is based on the "4x4" octave range system, which means that the user can output frequencies that are four octaves around the input frequency.

The DSP also allows for accurate frequency synthesis by enabling the use of filters and a PLL to help ensure that the output frequencies remain stable. The PLL ensures that any discrepancies between the input and output frequencies are minimized, while the filtering will allow for accurate frequencies to be outputted even in environments where noise may be present.

Programmable Loop Network

The programmable loop network is used to help optimize the output signal\'s performance. It contains a mix of amplifiers, loop filters, bypass capacitors, and reset circuits. Each part of the loop network is adjustable to ensure that the output signal is always at the optimal performance level.

The amplifiers are used to boost the signal coming from the DSP and ensure that the signal is strong enough for the loop network to work. The loop filters help dampen any noise or signal distortion, while the bypass capacitors help reduce jitter. Finally, the reset circuits are used to ensure that the output signals are not distorted by any external interference.

Conclusion

The LTC6948IUFD-4#TRPBF is a highly versatile and reliable component for high-frequency and low-jitter applications. Its digital frequency synthesizer and programmable loop network make it a powerful solution for any application requiring high performance and precision. Its wide range of frequency synthesis potential, combined with its low jitter, makes it an ideal component for a variety of applications. By taking advantage of its features, users can be assured that their projects will have the best possible performance.

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