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  • LMK04821: LMK04821 output can be used with single-end output ？

    Resolved
    Part Number: LMK04821 Other Parts Discussed in Thread: LMK04832 Hi TI experts: We design a new system with lmk04821,most of clks in our system are LVDS or LVPECL,so lmk04821 can handle it. But we still have several single-end clks need be drivered. As…
    • Resolved

  • LMK04821: PLLatinum phase noise simulation does not match datasheet plots

    TI Thinks Resolved
    Part Number: LMK04821 LMK04821 PLLatinum Sim phase noise nowhere close to datasheet plots. I've attempted to emulate the ~frequency plan used in the datasheet, matching filter BW and phase margin. I've used 125MHz ref and 2GHz VCO but should make almost…

  • LMK04821: PLL2 cannot be locked in single-loop mode

    Part Number: LMK04821 Hi team, Here's an issue from the customer may need your help: Using the single PLL mode of the LMK04821, input a differential clock of 125 MHz from the OSCin and please see the configuration parameters: https://e2echina.ti.com…
    • Answered

  • LMK04821: Phase Frequency Detector?

    Resolved
    Part Number: LMK04821 Other Parts Discussed in Thread: LMK04828 Hello, Just a question - are the phase detectors in the LMK04821 (and LMK04828) phase-frequency detectors or just phase detectors? ie. will the loop frequency lock (sweep to the correct frequency…
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    • Answered

  • RE: LMK04821: PLL1 occasionally loses lock

    Resolved
    Hi Andrea, Thank you for your support. The customer hasn't followed up for a long time and I think the issue has been resolved
    • Answered

  • LMK04821: Delay required after reset?

    Resolved
    Part Number: LMK04821 Dear Sir / Madam, What delay is required after pulsing the reset pin before registers can be written via SPI? Does the device reset on the rising edge of RESET? Same question really, but for SOFT RESET - after setting SOFT RESET…
    • Resolved

  • LMK04821: 0X183 REGISTER

    TI Thinks Resolved
    Part Number: LMK04821 Hi team, I have a application details want to confirm wiith you about LMK04821 0x183 register. what's the meaning when bit 1/RB_pll2_LD, should we pay attention to this status in the real case? Since this bit could also be cleared…

  • LMK04821: Clock configuration problem

    TI Thinks Resolved
    Part Number: LMK04821 The manual explains that lmk04821 has a total of seven groups of clocks. Each group of clocks includes DCLK and sdclk, of which DCLK is affected by the clock divider parameter and the other sdclk is affected by the sysref clock divider…
    • Answered

  • LMK04821: Maximum configurable output frequency

    Resolved
    Part Number: LMK04821 Hello everyone! I hope this question isn't too simplistic. I've been looking through the 0482x device family for a JESD204B clock tree design. The 4821, the only device that supports VCO1 division, seems to come up in searches…
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    • Answered

  • LMK04821: spurious at the internal VCO oscilaantion frequncy

    Resolved
    Part Number: LMK04821 Other Parts Discussed in Thread: DAC38RF83 My circuit is as below, DAC38RF83 with LMK04821 -> differential RF amplifier -> balun transformer -> single ended RF output. The is a spurious on RF output at the LMK04821 internal…
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