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LMK1C1102: LMK1C1102 duty cycle

Prodigy 20 points

Replies: 3

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Part Number: LMK1C1102

If a 100MHz sin wave is feeding into the input of LMK1C1102 with 0.9v(0~1.8v) amplitude. Is the output 50% duty cycle?

If not, can I buy other component with 50% duty cycle. thanks a lot!

  • Datasheet guarantees 45%-55% output duty cycle for 50% duty cycle input. For your 100MHz input, you would want to supply VDD = 1.8V so that the input swings around the input threshold of VDD/2 for 50% duty. If you used 3.3V or 2.5V for example, there would be duty cycle distortion when DC-coupled.

    Kind regards,
    Lane

    ____________________________________________________________________________________

    More information Clock and Timing System products: http://www.ti.com/clock-and-timing/overview.html

    Learn more about clocking fundamentals by watching the TI Precision Labs: https://training.ti.com/ti-precision-labs-clocks-and-timing

  • In reply to Lane Boyd:

    Thanks Lane. If the output is about 50% duty cycle with 100MHz sin wave. Is output a sin wave or square wave? 

    I need a clock buffer for digital IC. It's requirement is it should be square.

    If the output is sin wave, the digital IC may not work well. Thanks in advance.

  • In reply to mike meng:

    The output is a square wave

    Kind regards,
    Lane

    ____________________________________________________________________________________

    More information Clock and Timing System products: http://www.ti.com/clock-and-timing/overview.html

    Learn more about clocking fundamentals by watching the TI Precision Labs: https://training.ti.com/ti-precision-labs-clocks-and-timing

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