AnsweredAssumed Answered

Check if AD7147 is working?

Question asked by jenniferV13 on Oct 28, 2012
Latest reply on Dec 19, 2012 by spratt


We're having some trouble setting up our AD7147 and were wondering what the best way to check if it is indeed working. We have looked at the AC Shield Signal on an oscilloscope and it does not look as expected (see attached photo) - it goes from 0V to 3.3V but does not look like a proper square wave. We have also tried to do a serial read from some of the device's registers that we know should be initialized to non-zero values, but the CDC never reads out any non-zero data.


How would you suggest trying to debug this? So far, the only pins we have connected are Vbias (including the 100nF capacitor), Vdrive, Vcc, and ground. We've connected the serial pins as well when needed. All the CIN pins are floating. Is that a problem?