Hi Bob Thanks for replying. I appreciate your patience with me :) I was not taking shorted input test as you have mentioned. Apology for that. I corrected the setup as per your suggestion. I took 2 tests , 1) Shorted input test should have a resistor divider with two equal value resistors (10k ohm for example) connected between AVDD and AGND. Where the two resistors come together, you connect both inputs so that the inputs are shorted together at mid-AVDD supply to place the short within the proper common-mode for the ADS1231 input 2) Add some series resistance (1K ) to the analog inputs prior to the caps and collect some more data (Both analog inputs were shorted together before connecting to 2.5v) I have attached the file to this post. 3) You must also make sure that all the timing requirements and digital voltages to the digital inputs that I have previously discussed have been met. For example, the PDWN pin must be greater than 4V if DVDD is 5V for the ADS1231 . If the micro is powered by 3.3V, then the ADS1231 DVDD supply should also be powered by 3.3V Ensured this by connecting DVDD to 3.3v (Please visit the site to view this file)
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