AnsweredAssumed Answered

The converted value of your AD7763 when I use fullscale

Question asked by Kaos on Jan 30, 2013
Latest reply on Feb 4, 2013 by Kaos

Dear Sir/Madam,

1)When I put Vref=2.5V,and Vin(+)-Vin(-)=2V, the converted value is 0xFFFFFF, correct?

2)When I put Vref=2.5V,and Vin(+)-Vin(-)=0V, the converted value is 0x800000, correct?

3)When I put Vref=2.5V,and Vin(+)-Vin(-)=-2V, the converted value is 0x000000, correct?


I could not confirm well as above on the datasheet of your AD7763.

What are the supply voltage Vin(+) and Vin(-) that I can get the fullscale?
On your datasheet, the differential input voltage shows as following.
Vin(+) - Vin(-) = +/- 2Vp-p at Vref=2.5V.
Vin(+) - Vin(-) = +/- 3.25Vp-p at Vref=4.096V.
Above 1) to 3) my questions were come from this.


Thank you in advance, Kaos