• LMX2581: Is it possible to set the output of 2 channels with the same frequency but a phase difference of 180°

  

  wei.zhang

  TI Thinks Resolved

  Part Number: LMX2581 Tool/software: Is it possible to set the output of 2 channels with the same frequency but a phase difference of 180°

  • 4 months ago
  • Clock & timing
  • Clock & timing forum
Answered

• LMX2581: spurious at intervals of 10 MHz

  

  akihiko yokouchi

  Resolved

  Part Number: LMX2581 Other Parts Discussed in Thread: , LMX2572LP I need some advice regarding the LMX2581. Fosc: 10MHz, Fout: 280MHz, Fpd: 10MHz. As a result of actual measurement, spurious at intervals of 10 MHz is observed at 280 MHz. This spurious is…

  • Resolved

  • 11 months ago
  • Clock & timing
  • Clock & timing forum

• RE: LMX2581: not achaive proper frequency and no digital lock

  

  Noel Fung

  Hi KS, Thank you for using TI products, feel free to post when you have application issues.

  • over 1 year ago
  • Clock & timing
  • Clock & timing forum

• LMX2581EVM: LMX2581 evaluation module PCB Layout

  

  Simone Carini

  TI Thinks Resolved

  Part Number: LMX2581EVM Other Parts Discussed in Thread: LMX2581 Request review materials for product design. LMX2581 Evb Design Source. Ideally gerber files and, if possible, a step 3D of the board. Thanks

  • over 1 year ago
  • Clock & timing
  • Clock & timing forum

• LMX2581: Reference Oscillator Input Levels

  

  Charles Luke

  TI Thinks Resolved

  Part Number: LMX2581 Data sheet on Page 7 says OSCIn input voltage min=0.4Vpp, max=1.7Vpp. Figure 12 and 13 show a much lower sensitivity, on the order of -27dBm. Can you explain the differences in the data sheet? Also, I'm using a CMOS TCXO and it appears…

  • over 1 year ago
  • Clock & timing
  • Clock & timing forum

• LMX2581: harmonic outputs are hi and affecting my demod image rejection

  

  Charles Luke

  TI Thinks Resolved

  Part Number: LMX2581 I am running differential outputs with 50 ohm pullups and driving into a demod chip that has input imped of 100 ohms. At 750M I'm measuring a high second harmonic level of -10dBc. I am only getting 18dB image rejection from the demod…

  • over 1 year ago
  • Clock & timing
  • Clock & timing forum
Answered

• LMX2581: Can we analog Frequency Modulate on LMX2581

  

  Simon Brown

  Resolved

  Part Number: LMX2581 We are trying to implement FM on a 450MHz output signal. which we get an response ,( AM implement on loop filter) but this is not stable or consistant over our Audio frequency range ( 1-40KHz) Do you think this is possible to get reliable…

  • Resolved

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

• LMX2581: Is it OK to leave the unused RFoutB pin open on the LMX2581?

  

  yoshitsugu hirata

  TI Thinks Resolved

  Part Number: LMX2581 Is it OK to leave the unused RFoutB pin open on the LMX2581?

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

• LMX2581: MUXout of LM2581

  

  akihiko yokouchi

  Resolved

  Part Number: LMX2581 Please give me some advice regarding the MUXout (LD) of the LMX2581. OSCin:120MHz, RFout:1540MHz. The setting of LMX2581 is as follows, and data is written from R5(int). Even if OSCin is turned on from off, MUXout remains High Level…

  • Resolved

  • over 2 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

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