Part Number: ADS1220 Tool/software: Dear TI Community, I am currently working with the ADS1220 and facing some challenges with my configuration and data readings. Here are the details of my setup: please do verify Schematic Diagram Two Wire RTD And please check my code . Configuration: Register 0: Command 0x66 AINp = AIN1,AINn = AIN0 Gain = 8 PGA = Enabled Register 1: Command 0x04 Data Rate = 20 SPS Normal mode Continuous Conversion mode Register 2:command 0x55h External Reference configuration(REFP0,REFN0) Simultaneous 50Hz/60Hz rejection IDAC = 500 µA Register 3:command 0x80 IDAC1 connected to AIN3/REFN1 Procedure: I first send the command 0x06 (Reset Command). Before reading data, I send the command 0x08 (Start Conversion). Issue: I am using a PT100 RTD for temperature measurement, but the ADC raw data does not change with varying temperatures. I am only receiving two values: 8388351 and 8387839, regardless of the temperature applied to the RTD. Questions: Is this issue likely related to hardware or software configuration? Are there any specific settings or steps I might be missing that could help improve the consistency of the readings? I appreciate any guidance or suggestions you can provide. Thank You!
↧