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

user6034716

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

over 4 years ago

0 Ryan Andrews over 4 years ago

TI__Guru 57336 points

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,

0 user6034716 over 4 years ago in reply to Ryan Andrews

Intellectual 600 points

Hi Ryan,

Thanks for your answer.

Peter

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