LMX2492EVM: vco s band

romain fouettilloux

Part Number: LMX2492EVM
Other Parts Discussed in Thread: LMX2492, LMX2491

Hi,

can you tell me which compatible vco pin can be used to output a chirp between 2.35 and 2.55 Ghz and between 2.9 and 3.1Ghz with the lmx2492 ?

Best regard.

romain fouettilloux

over 8 years ago

0 Noel Fung over 8 years ago

TI__Guru** 122400 points

Hi Romain,

I don't quite understand your question.
LMX2492 is a PLL, it doesn't have embedded VCO.
If you want 2.4GHz output, then you need to connect a 2.4GHz VCO to LMX.

0 romain fouettilloux over 8 years ago in reply to Noel Fung

Prodigy 70 points

I speak about the macom vco on this board. It is an xband vco and i want a s band vco to do a 2.5 or 2.9Ghz on the evm board.

0 Dean Banerjee over 8 years ago in reply to romain fouettilloux

TI__Mastermind 28031 points

Romain,

If what you want is a VCO that is lower frequency, then the VCO needs to be changed.

In this board, note that we have two footprints, U2 and U2p. Footprint U2 is better for higher frequency silicon VCOs. If you use footprint U2p, you can find many lower frequency VCOs from Zcomm or Crystek that can fit in this footprint.

Also consider the LMX2491. This is the same as the LMX2492, except that it is lower frequency and lower current version of the LMX2492.

Regards,
Dean

Clock & timing

Clock & timing forum

LMX2492EVM: vco s band