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PGA308: Adjust the parameter

user6243139
Prodigy 180 points
Part Number: PGA308

Hi,

In the User's Guide (Literature Number: SBOU069B) about PGA308, Complete Scaling Example is shown on 3.3.1.

There are Step1 - 13 for the scaling. Do you have any idea about we don't use this step.

For example, skip the steps, replace or shuffle the steps.


Will we have any issue for the complete scaling in this case  possibility?

Best regards,

KoT

  • +1
    TI__Guru 52616 points

    Hello KoT,

    Steps 1-13 document the calculations performed by the EVM software to obtain the correct calibration coefficients during the calibration routine.The PGA308EVM-USB performs the calibration routine in the software.  The calculations are based on the external bridge sensor measurements (or the sensor emulator measurements)  and the required PGA308 output target settings. 

    Prior running the calibration routine, the user has to provide the desired settings for the application: supply voltage, reference voltage, the PGA308 desired output mode (vout, vout-to-one, or current output) and the desired PGA308 zero scale and full-scale output targets.    

    Given these settings, during the calibration routine, the PGA308 software will select the required Course offset, Zero DAC offset settings and select the appropriate Front-End PGA gain settings along the Gain DAC settings based on the bridge sensor zero scale and full-scale measurements. 

    The calculations are performed in software after the user presses the ”Calibrate” button on the Calibration Tab of the PGA308EVM-USB GUI.  If the user connects an external bridge sensor, the user will be required to apply the zero-scale and full-scale pressure to the sensor when prompted by the software while performing the calibration routine.

    Thank you and Regards,

    Luis

  • 0
    Prodigy 180 points

    Hi Luis-san,

    Thank you for your reply. I understood. It's dedicated procedure.

    We try to make our software reference this procedure.

    Best regards,

    Ko Tokoi