About AD7927　2×REF　MODE

HI Uboti,

      Sorry for this late response. When RANG bit is 0, the input voltage is from 0V to 2x REFIN. If for example REFIN = 2.5V, the total input voltage will be 0V to 5V. I did not understand what you mean by variation from the outside. Kindly elaborate further details on what you mean.

Regards,

Jonathan 

thank you for your reply.
The AD7927 uses an external REF input.

If I apply 2.5V to REFIN, I think it is internally set to 5V (in ~2×REFIN mode).

What is the gain variation from 2.5V to 5V?

Do you mean Gain error variation? Based on the datasheet, the positive error varies from +/-1.5LSB.

Do you mean Gain error variation? Based on the datasheet, the positive error varies from +/-1.5LSB.