Hi Fausto, I have not finished going through all the material you sent previously. I did want to tell you that DRDY is an actively driven push-pull pin and is independent of CS. It does not require a pull-up. If you do not see this pin go high or toggle, then the ADC is not converting. Double check your RESET and DSYNC pin to make sure they are both high and that all your supplies are active and powering the ADS1217 at the device pins. Also, make sure your crystal is oscillating. You have some very large capacitors on the crystal pins. These should be on the order of 10pF and not 1000pf. Best regards, Bob B
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