• LMX2581: not achaive proper frequency and no digital lock

  

  k s

  TI Thinks Resolved

  Part Number: LMX2581 Other Parts Discussed in Thread: LMK04906 , , CODELOADER , USB2ANY Hi. In project we have using two LMX2581 in one PCB, both are the the same circut, role, and very similar layout. On the other hand, layout doesn't differ significantly…

  • over 2 years ago
  • Clock & timing
  • Clock & timing forum

• LMX2581: lmx2581 CODELOADER4 DOWNLOAD

  

  ZHENGOU CAO

  TI Thinks Resolved

  Part Number: LMX2581 Other Parts Discussed in Thread: CODELOADER , HI, i am finding the setup file of CODELOADER 4,but i just find a "snac014.workz" on the TI.COM. SO ,pls SEND ME A LINK TO DOWNLOAD THE WHOLE CODELOADER SOFTWARE,THANKS!

  • over 4 years ago
  • Clock & timing
  • Clock & timing forum
Answered

• LMX2581: LMX2581

  

  Meng Liu

  Resolved

  Part Number: LMX2581 Other Parts Discussed in Thread: PLLATINUMSIM-SW Hi when I read LMX2581 datasheet, I am confuse about Dithering. My confusion lies in why need equivalent Denominator > 200 and is divisible by 2 or 3 can enable dithering? it's very…

  • Resolved

  • over 4 years ago
  • Clock & timing
  • Clock & timing forum

• LMX2581: The Frequency Bounds on the VCO Cores

  

  Charles Luke

  TI Thinks Resolved

  Part Number: LMX2581 Table 5 in the data sheet says Approximate (NOT ensured) VCO Core Frequency Ranges. In my design there are boundaries where, as I step in frequency, the VCO core will change. I have identified them according to Table 5. This is not…

  • over 2 years ago
  • Clock & timing
  • Clock & timing forum

• LMX2581: Phase Noise Performance

  

  Vigneshwar Raj

  TI Thinks Resolved

  Part Number: LMX2581 Other Parts Discussed in Thread: LMX2582 Hello TI Team, I am planning to use LMX2581 RFPLL in my new design for generating Clocks upto 3.5GHz. I saw Phase noise plots for some frequencies in Datasheet with Narrow and Wide band…

  • over 3 years ago
  • Clock & timing
  • Clock & timing forum
Answered

• LMX2581: Question About Lock Detect Output Functionality based on LD_SELECT

  

  Charles Luke

  Resolved

  Part Number: LMX2581 Reading the responses from before, I realize one question was not answered. The earlier post is marked resolved so I am asked this question again. In writing to Reg 6 with LD_SELECT = 4, table 15 shows the register map with RD_DIAGNOSTICS…

  • Resolved

  • over 2 years ago
  • Clock & timing
  • Clock & timing forum
Answered

• LMX2581: Question About Lock Detect Output Functionality based on LD_SELECT

  

  Charles Luke

  Resolved

  Part Number: LMX2581 LD_SELECT can be values from 0 to 15. For number 4, READBACK, you have to clock out the bits for the register you are reading. It appears other bits are just a single logic output such as for LD_SELECT values of 1, 2, or 3 that are…

  • Resolved

  • over 2 years ago
  • Clock & timing
  • Clock & timing forum
Answered

• LMX2581E: Differences LMX2581 vs LMX2581E

  

  DJ-NG

  Resolved

  Part Number: LMX2581E Hi champs! Customer asks for differences between both products and what are disadvantages from NON-E to E version ?

  • Resolved

  • over 3 years ago
  • Clock & timing
  • Clock & timing forum
Answered

• LMX2581: Vtune in Input after programming

  

  Tate Fisher

  Resolved

  Part Number: LMX2581 Is the Vtune pin necessary if the LMX2581 is programmed to output a specific frequency? If not, should it be tied high?

  • Resolved

  • over 3 years ago
  • Clock & timing
  • Clock & timing forum
Answered

• LMX2581: LMX2581 Fractional Spur - Primary Fractional Spurs

  

  Meng Liu

  Resolved

  Part Number: LMX2581 Hi support team l am reading LMX2581 datasheet and l am confused about primary fractional spur. primary fractional spur is Fpd/PLL_DEN.For instance, if the phase detector frequency is 100 MHz and the fraction is 3/100, the primary…

  • Resolved

  • over 4 years ago
  • Clock & timing
  • Clock & timing forum

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