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ADS7253: could ADS7253 sample 2 or 3 times of input with one request?

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Replies: 2

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Part Number: ADS7253

I could get one sample value(eg, current)  with one request, as general application. Now I want to get two sample value(eg, current1, current 2) with one request(send SPI msg only once), so I could caculate the current = (current1 + current2)/2 which gets rid of noise and has higher accurate.  I am not sure if ADS7253 has this function, and if yes,  how to use it ?

Thank you,

Peter

  • Hello Peter,

    Thank you for your post.

    What you are describing is the averaging of back-to-back samples in order to reduce the noise in the measurement. A SAR ADC only performs a single conversion at a time. In order to average samples, you must collect multiple samples and average the results in post-processing.

    Best regards,


    Ryan Andrews

    Applications Engineer | Precision ADCs 

    Are you working on a bio-potential application? Check out these helpful resources: ADS129x BIOFAQ | ECG Online Training

  • In reply to Ryan Andrews:

    Hi Ryan,

    Thanks for your answer.

    Peter

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