Hi,Sir:

The AD5755-1 datasheet says:" The correct method to calibrate the gain/offset is to first calibrate out the gain and then calibrate the offset.".what's that meaning?I think it shoud calibrat offset first at zero. And I expecd get detail method for gain/offset method.

Thank you very much!

Regards.

Yushg

Hi Yu,

That is correct. You have to make sure that your reference voltage is at least equal or greater than your desired output.

If you look at equation 1 (page41) on the data sheet, you can only turn down the slope and can not be set to greater than 1 since M can only have a maximum value of 65535 LSBs.

slope= (M+1)/65536Best regards,

Rainier