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ADS114S08EVM: Script for several measurements

Tobias Schellenberger
Prodigy 20 points
Part Number: ADS114S08EVM
Other Parts Discussed in Thread: ADS114S08

Hello,

we have the ADS114s08EVM demo board for tests.

the pre defined single scripts for RTD 3-wire, RTD 2-wire,... are very good.

I want to know, give it a script for several measurements after each other?

We want to measure 4 RTDs with one ADS114s08.

(roughly comparable to dokument: Delta-Sigma ADC EvaluaTIon Software User Manual, page 30, figure 17)

------------

Needed script:

Script-part1: Measure RTD1 at AIN1/AINCOM

Script-part2: Measure RTD2 at AIN3/AINCOM

Script-part3: Measure RTD3 at AIN5/AINCOM

Script-part4: Measure RTD4 at AIN7/AINCOM

show the values at the "Data Analysis"

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Currents on AIN0/2/4/6 have to pulsed, we know that we have to do changes at the demo board.

But im not a software specialist which can make a complete program Slight smile

Let me know it, if you need more information...

best regards

Tobias

  • 0
    TI__Guru** 112725 points

    HI Tobias,

    The ADS114S08 can only make one measurement at a time using a muxed input as there is only one ADC.  Similarly, the ADS114S08EVM can only make one measurement at a time and display it.  You cannot make four measurements and then display all four measurement data at the same time.  This would be like making the EVM into a system and outside of the design intent for the EVM.  

    The figure you are referencing is for an ADC that has multiple ADCs for simultaneous sampling converters and not a converter that is using a muxed input.

    It would be possible to make one script that includes all four measurements, but you would be required to pause after each measurement to review the data before proceeding to the next measurement.  It may be just as easy to make one script and then copy and edit it for the next 3 measurements.

    Best regards,

    Bob B