Part Number: ADS1263EVM-PDK Hi, I am having an issue with the evaluation board ADS1263EVM-PDK and the ADCPro software. The evaluation card is us to make a proof of concept for a medical device. There is three electrodes that are connected to IN2, IN3 and GND terminals. Each time I use the electrod and sampling some data like my heart beat, I am always getting a PGA negative rail fault even if the data is between the PGA rails. The evaluation card is supply in bipolar (±5V) and the internal reference is used. The ADCPro is setup for sampling AIN2 and AIN3. The PGA Gain is set to 1V/V. The sampling data magnitudes are between 3.9mV and 4.7mV. If I use a signal source, I am able to sample a DC signal from -2.2V to +2.2V without the negative rail error. I have attached the sampled heart beat signal exported to an excel file. Any idea?(Please visit the site to view this file) Thanks Olivier Bergeron
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