[quote user="Bob Benjamin"]Hi PLCmatic, As the transmitter can actually float to a voltage outside of the input range of the ADS124S06 , you will need to establish a common reference point. This can be accomplished as you have stated by setting the ground reference of the resistor equal to the ADC ground. This will make the measurement single-ended (or 1/2 of the differential measurement) using only the positive full-scale range of the ADS124S06 . It appears that you will use 5V for the reference and the maximum output of the transmitter at 4V (20mA * 200 Ohm). When making a single-ended measurement with the ADS124S06 , you will need to BYPASS the PGA as discussed in the datasheet in section 9.3.2.3 on page 34. Best regards, Bob B [/quote] Hi Bob, thanks you for the explanation. I forgot to mention that the ADC is configured with PGA bypassed as you suggested. Thanks again. Best regards
↧
