CDCM61001: CDCM61001

Jifei Chen

Prodigy 20 points

Part Number: CDCM61001

Tool/software:

Hello,

the below screenshot picture from the spec of CDCM61001.

My question is that the one terminal of crystal can be connected to GND? is it true?

thanks!

over 1 year ago

0 Kadeem Samuel over 1 year ago

TI__Mastermind 23250 points

Jifei,

The CCDM61001 employs a Colpitts oscillator topology, explained below:

Note the XTAL connection in the evaluation module:

Thanks,

Kadeem

+1 Jifei Chen over 1 year ago

Prodigy 20 points

Hello,

Appreciate your coach.

could you let me know what is the Part Number for Colpitts oscillator on TI's EVB?

So far, I don't know which oscillator belong to Colpitts type, although there are many osillator on Digikey components distributor which doesn't show the type of oscillator.

thanks,

David

0 Kadeem Samuel over 1 year ago in reply to Jifei Chen

TI__Mastermind 23250 points

David,

Three different crystals are provided in the datasheet:

I do believe that Vectron may now by under Microchip.
ABM3B-25.000MHZ-10-1-U-T has also been recommended by us in the past.

This does not require any sort of "special" XTAL, the CDCM61001 just uses a different method of driving the XTAL to resonate. Julian describes this here: https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/236233/cdcm61001-crystal-input-connection/828940?tisearch=e2e-sitesearch&keymatch=cdcm61001%2520oscillator#828940

Thanks,

Kadeem

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CDCM61001: CDCM61001