AnsweredAssumed Answered

AD7792 very slow for 2 channels?

Question asked by coreDesign on Jan 16, 2017
Latest reply on Jan 26, 2017 by JellenieR

Hi,

I tried to use 2 channels on the AD7792 and read them with a frequency of 100 Hz, but I only reached 97 Hz. The datasheet say that after a channel change the first conversion is available after a period of 2/fADC. I set the Update Rate to 470 Hz - so the frequency for reading both channels should be 117,5 Hz (1 / (2/470Hz*2))? Which part needs the other time?

 

And another question: is anyone of the AD77xx series faster?

 

Thank you very much.

 

Regards,

Outcomes