• LMX2572: Cannot sync RF outputs with SYNC line

  

  David

  TI Thinks Resolved

  Part Number: LMX2572LP Tool/software: TI TICS PRO 1.7.7.6 I have 2 boards each with a LMX2572LP. Both are supplied with an identical 10Mhz input clock, and both are connected to one TI Reference Pro board, and both are programmed to output 200Mhz. Both…

  • 6 days ago
  • Clock & timing
  • Clock & timing forum
Answered

• LMX2572: LMX2572 locked at low temperature okay. However reloading the registers with the same data at low temperature may cause and unlock condition.

  

  Stuart Rumley

  Resolved

  Part Number: LMX2572 Tool/software: LMX2572 running okay at low temperature of about 0deg C and locked. If I reload the registers at this lower temperature, the LMX2572 may not always lock. When taken back up to normal temperature then reloading registers…

  • Resolved

  • 2 months ago
  • Clock & timing
  • Clock & timing forum

• LMX2572: LMX2572 based LO module

  

  frank ziegler

  Part Number: LMX2572 Tool/software: I'm looking for a simple way to implement an LMX2572 chip into my design without spending a month writing software and tweaking my PCB for VSWR.

  • 6 months ago
  • Clock & timing
  • Clock & timing forum

• LMX2572: VCO okay Channel dividers fail.

  

  Stuart Rumley

  TI Thinks Resolved

  Part Number: LMX2572 Tool/software: The VCO output is ok with good phase noise and output power over the full range of 3.2GHz to 6.4GHz. But the channel divider outputs have very bad spectrum and power as if the dividers are not being driven hard enough…

  • 3 months ago
  • Clock & timing
  • Clock & timing forum

• LMX2572: Lock time is over 500us after reloading serial data without changing frequency

  

  Stuart Rumley

  TI Thinks Resolved

  Part Number: LMX2572 Tool/software: Signals below in descending order are: Lock detect, SCK, SDI, and LE. The is from a reload at the same frequency of 21 registers. Lock detect is unlocked for over 500us. Is this the VCO recalibration time?

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

• LMX2572: Direct VCO output OK but divided output spectrum very poor and broad

  

  Stuart Rumley

  Resolved

  Part Number: LMX2572 Other Parts Discussed in Thread: LMX2594 , LMX2595 Tool/software: The synthesizer chip behaves normally with good spectrum and phase noise but when using the divider the spectrum is very poor and broad. However, when I use a foam tipped…

  • Resolved

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

• RE: LMX2572: LMX2572 VTune

  

  Noel Fung

  Resolved

  Hi BZ, You need to do a VCO calibration and a register read back to find out the exact VCO parameters ( VCO_SEL; VCO_CAPCTRL and VCO_DACISET) for the frequency you want. When you apply the data, you have to put the device in full assist mode. Looks like…

  • 8 months ago
  • Clock & timing
  • Clock & timing forum

• LMX2572: LMX2572 output power

  

  David N Shelef

  TI Thinks Resolved

  Part Number: LMX2572 Hi, I am looking for the LMX2572 output power tolerance. In the datasheet, it is typically 4.5 dBm. Thanks, David

  • 9 months ago
  • Clock & timing
  • Clock & timing forum

• LMX2572: LMX2572

  

  BZ

  TI Thinks Resolved

  Part Number: LMX2572 Can I get any sample code or libraries that can be implemented for programming this PLL? set frequency ,RAMP.... It can be for any embedded platform even Linux. advanced thanks. BZ

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

• LMX2572: LMX2572 VCO output power

  

  Nicolas Faria

  Resolved

  Part Number: LMX2572 Hi! I am using the LMX2572 and wanted to ask a clarification question concerning the VCO's output. On the data sheet in section 8.1.5.3 Unused Output Pin, they mentioned that the buffer can be used as two single-ended outputs…

  • Resolved

  • 10 months ago
  • Clock & timing
  • Clock & timing forum

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