I'm building a data acquisition board with an ADAR7251 ADC. I'm trying to figure out the crystal oscillator circuit, and am stuck on the damping resistor. The relevant datasheet is https://www.analog.com/media/en/technical-documentation/data-sheets/ADAR7251.pdf, page 21.
I'm planning on running the crystal at 19.2Mhz.
I understand how to determine the loading capacitors based on the load capacitance of the crystal, and know I should be selecting the resistor to achieve the desired drive level of the crystal. However, I have no clue how to go about determining the correct resistor value to achieve the desired power level. I've seen other examples (such as https://www.crystek.com/documents/appnotes/pierce-gateintroduction.pdf) of finding the resistance values when the feedback resistor is known, but I can't find it specified anywhere in the ADAR7251 datasheet.
How should I find the damping resistor value?
Here's the schematic from the ADC datasheet, it's pretty straightforward:
Thanks for the help!