LTC6957HMS-4#PBF

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Introduction

The LTC6957HMS-4#PBF is a member of Linear Technology\'s Clock/Timing - Clock Buffers, Drivers family. It offers a variation of 4-output high-speed, asynchronous buffers for clock distribution, tracing applications and reduction of clock skew.It is a differential 32mA drive buffer with four outputs, allowing larger numbers of outputs per package and reducing PCB space requirements. It is an ideal choice for those applications requiring absolute minimal skew and jitter between outputs.

Applications

The LTC6957HMS-4#PBF can be used in a variety of applications including multiple clock distribution in multi-processor systems, clock sharing/multipoint clock distribution in FPGA/CPLD systems, clock translation/directions, time synchronization and buffering clock signals with strict jitter and skew requirement.

It has the ability to reduce risk in noise-sensitive applications. It also helps improve spatial and temporal performance for precision timing tasks. Other applications include clock routing and clock repair - which can help restore broken clocks from high-speed signals in ASICs, ASSPs and FPGAs - as well as multi-card synchronous signaling and I/O isolation via power rails.

Working Principle

The LTC6957HMS-4#PBF is essentially a voltage-controlled oscillator (VCO) which uses the resistance-capacitance (RC) network, to generate a clock frequency. It consists of two parts, which are the control amplifier and the oscillator circuit.The control amplifier sets the output frequency by controlling the frequency-determining capacitor. The oscillator circuit sends the frequency signal, through the output buffer, to the other output stages, where it is further enhanced.The capacitor, in the LTC6957HMS-4#PBF, has a non-linear variation of capacitance with the voltage, and the buffer maintains this non-linearity. The buffer also amplifies the level of the voltage control signal, which further improves the precision and accuracy of the output frequency.The output stages in the LTC6957HMS-4#PBF are the same as those in an amplifier. The output stages will amplify the input signal and then send it to the output port for further processing or output. This allows for a higher output frequency range, as well as increased power efficiency and accuracy.

Conclusion

Overall, the LTC6957HMS-4#PBF is a powerful and versatile device designed for use in a variety of applications requiring clock signals with minimal jitter and skew.

The device is extremely useful in applications such as multiple clock distribution, clock sharing/multipoint clock distribution, clock translation/direction, time synchronization, buffering clock signals, clock routing, clock repair and multi-card synchronous signaling.

The LTC6957HMS-4#PBF greatly reduces the risk of noise in sensitive applications, and also helps improve spatial and temporal performance for precision timing tasks.

It integrates dual voltage-controlled oscillators, offering a variation of 4-output high-speed, asynchronous buffers for clock distribution, tracing applications and reduction of clock skew.

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