Hello,
We are using the ADS114S08B to measure a servo's feedback pot. Frequently, whenever the servo limit switch open, it will cause the DRDY pin to stop going low and the internal 2.5V reference will go to 0V. The noise could be coming through the input to the A/D or through the AC/DC switch mode power supply that is fed with the same 120V that powers the servo. The schematic for the A/D input circuit is below. We've tried to mitigate the noise on the AC lines and we used shielded cabling for the feedback pot wires and the A/D is still dropping the 2.5V reference and not dropping the DRDY pin.
Any help is appreciated,
Thanks,
Jake