As I'm working through the ADS127L11EVM-PDK, I see the 127 has some different clock options.
From the data sheet:
Simply from a parts reduction/cost reduction/EMI standpoint, not having another oscillator on our board is appealing. Our application would setup the 127 filtering to produce readings on the order of 10-60 SPS, used to measure DC voltages.
Based on the statement in the datasheet, we'll likely move forward using the internal oscillator. I'm curious if there's any general significant pitfalls (beats?) we should be aware of using the internal oscillator based on our application. I should say that we'll likely have four ADS127L11s in our system. Every 100mS, our microprocessor will pulse its single pin that's connected, in parallel, to the START pins of all four ADS127s on the board (thus getting their new convert start sequences in sync). Then, when the data is ready, the micro will sequentially move down the line and read out, via SPI, each new reading. I only make that statement to provide further context for my pitfall question.
On the surface, I can see the respective internal oscillators being ever so slightly different frequencies, but it doesn't feel like that would be a problem for our DC voltage measurement application.
Just generally curious of your thoughts.
Thanks.
