Hi,
When I debug ADS1247 chips, I find the problem:
AIN0 pin connects a capacitor to the ground. There are (AVDD + AVSS) / 2 bias voltage (2.5 V), as the negative input. AIN1 pins is as positive input. The datasheet of ADS1247 is http://www.kynix.com/Detail/1250614/ADS1247.html
When AIN1 pin...