Cmod A7 option to set synchronizable switching frequency of the regulator.

[steffoe]

Hello,

In my project im using the Cmod A7 to interface with an ADC that samples at 2MSPS.

I noteced that the switching frequency of the regulator on the CMOD A7 is aliasing with the ADC.

Is there a option to sync the LTC3569 on the A7 to my sample clock?

The LTC is Synchronizable from 1.2MHz to 3MHz

 

Kind Regards,

Stephan

Edited December 11, 2023 by steffoe

[JColvin]

Hi @steffoe,

I do not think this feasible to change on the Cmod A7.

You would have to somehow cut the trace supplying power to only pin 6 on the LTC3569 (since right now it is in the Vrt = SVin configuration), get an external clock signal to the MODE pin, and then select the correct RT resistance as explained in the Applications Information section of the LTC3569 datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/3569fe.pdf. It might be technically possible to modify the Cmod A7 in its already limited space to support this, but I would not attempt such a modification.

Let me know if you have any questions.

Thanks,
JColvin