LMX2491: Ramp generation

Tech A

Prodigy 40 points

Part Number: LMX2491

Tool/software:

I was working an jamming project where i generating

1. A ramp from 2.4 to 2.485 GHz with 0.1us time period

2 .A ramp from 5.725 to 5.85 GHz with 0.1us time period

are settings correct for the above output
if not please give me the correct settings
3. Is it possible achieve that 125MHz in time period

and also suggest me vco which is capable of handling the slew rate

1 month ago

0 Noel Fung 1 month ago

TI__Guru** 107880 points

Hi There,

100ns sweep time is not practical at all, this is too short for a closed-loop PLL. If you really need this sweep time, you may consider doing this with a DAC.

0 Tech A 1 month ago in reply to Noel Fung

Prodigy 40 points

Hi,
What is the minimum time period with which i can sweep 125MHz using this LMX2491

0 Tech A 1 month ago in reply to Noel Fung

Prodigy 40 points

Hi,
Can u suggest me a ramp generator or Triangular Wave generator which can achieve this rate of 0.1us for 15MHz and Vco for a 2.4 to 2.485GHz and 5.725 to 5.85GHz with Wider Frequency modulation bandwidth for maintaining gain flatness across the sept band.

+1 Noel Fung 1 month ago in reply to Tech A

TI__Guru** 107880 points

Hi There,

Our product line does not have this product, suggest check it out in the Data Converters forum.

Clock & timing

Clock & timing forum

LMX2491: Ramp generation