Other Parts Discussed in Thread: ADS124S08
Hello,
I am trying to do RTD measurements using the ADS124S06. Can you verify this scheme for me please.
The resistance range of the RTDs are:
- RTD1 - 4wire measurement: 900 - 1400 Ohm
- RTD2 - 4wire measurement: 600 - 1400 Ohm (This is a PT1000 with P/N: 32208707 - 0 degree C to 100 degree C)
- RTD3 - 2wire measurement: 100 - 500 Ohm
The measuring scenario is:
- Device bootup -> RTD3 is measured once.
- After that, RTD1 and RTD2 are continuously measured throughout the process: I also have some questions at this point:
- Can I drive IDAC1 and IDAC2 simultaneously?
- I don't need the PGA gain for the RTD1 and RTD2 measurement, right? Because the measurement voltage at AIN is about ~2,2V max.
Sorry for the bad drawing :)
I am referring to this 4-wire design and 2-wire design guideline by TI.
Thank you very much in advance.
Best,
Thai.