• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 47 subscribers
  • Views 775 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Regarding ADS1230 interface with PIC

Soundarajan P
Prodigy 35 points

Other Parts Discussed in Thread: ADS1230, ADS1232REF

 Hello Sir, 

In my project using ADS1230 interface with PIC.When applying load in load cell adc value varies from initial value 72950 to 524287.

Loadcell : 10Kg

Sensitivity : 2mv / V

Gain 128 and Datarate 10SPS

My calculation below

temp = ( ADC output - Inital Value) / (524287 - Initial value)

I need 10 bit Resolution data 

Value = temp * 1023 ;

But the value should varies I didn`t get excat weight in the above calculation.

I need Calibration formula . I`m waiting your response.

  • 0
    TI__Guru** 113765 points

    Hi Soundarajan,

    I think you must have a connection/excitation problem as you are ending up at positive full-scale (524287).  What is your excitation voltage?  The output of the load cell must be within the correct common-mode input range for the ADS1230.

    Information for the weight calculation can be found in the ADS1232REF user's guide document.  For calibration you can use two points with one at zero weight and the second at a weight result when a calibrated weight is placed on the load cell.  The difference in the number of codes determines the value of the weight applied.  Each code represents the fraction of weight for the weight applied divided by the number of codes for the difference (weight applied codes - zero weight codes).

    Best regards,

    Bob B