ADS1247: Technical inquiry

Hi!

Hope you're well! 

What is the CLK pin connected to if not DGND or an external clock?

If the CLK pin is floating, this solution may not be consistent in activating the internal oscillator of the device.  

If the external clock is activated by noise, I would expect erroneous results on the digital pins or a latch-up. Resetting the device will be necessary to continue collecting results using the internal clock. 

As stated in the datasheet:

9.3.3 Clock Source The device can use either the internal oscillator or an external clock. Connect the CLK pin to DGND before power up or reset to activate the internal oscillator. Connecting an external clock to the CLK pin at any time deactivates the internal oscillator, with the device then operating on the external clock. After the device switches to the external clock, it cannot be switched back to the internal oscillator without cycling the power supplies or resetting the device.