ADuCM355 32MHz Crystal

Hi Nick,

The crystal is an EPSON TOYOCOM FA-128, 32MHZ, 10PPM, 8PF. What is your intended application? A 16MHz crystal such as an ABRACON ABM8-16.000MHZ-7-1-U-TCORP may be better suited. The AFE die in the ADuCM355 runs at 16Mhz for default operation and only operates at 32MHz for impedance measurements where the excitation frequency is >=80kHz.

Thank you!  Seems like my highest frequency is 900Hz for Square Wave Voltammetry, but this could change in the future.  Mainly, I'm running my tests on the EVAL-ADuCM355QSPZ dev board, which has a 32MHz crystal, and I'd like to match the dev board as much as possible to reduce risk in my implementation.

Is there a downside to having 32MHz vs 16MHz?

The downside is increased power consumption as the external crystal clock to the ADC cannot be divided. Check out the Analog Die Clock Features section in the hardware reference manual for further details. I would recommend that you use the 16Mhz crystal.