Part Number: ADS1285EVM-PDK Tool/software: Hi,Team. We received the following question from our customer. The ADS1285EVM is running with AVSS=-2.5V, VREF=5V, and PGA Gain=1, and the conversion data is read at about 1.2 times the voltage value input to AIN1. When the input voltage is 1.0V, the read data value is 1.2V When the input voltage is 1.7V, the read data value is 2.04V When the input voltage is 0V, the read data value is around 0.00006V. The same result can be obtained by changing the PGA setting to Buffer. Other settings are POWER mode High, Data rate 4000SPS, PHASE Linear, FILTER FIR filter (setting value 01b). Could you please tell me what the possible causes (settings, etc.) are and what measures can be taken? Best Regards.
↧