Rainbow-electronics ADC0809 Manuel d'utilisateur télécharger pdf (Page 11)

Applications Information (Continued)

3.0 CONVERTER EQUATIONS

The transition between adjacent codes N and N+1 is given

by:

(2)

The center of an output code N is given by:

(3)

The output code N for an arbitrary input are the integers

within the range:

(4)

where: V

Voltage at comparator input

REF(+)

Voltage at Ref(+)

REF(−)

Voltage at Ref(−)

TUE

Total unadjusted error voltage (typically

REF(+)

512)

DS005672-26

FIGURE 12. Typical Reference and Supply Circuit

DS005672-27

Ratiometric transducers

FIGURE 13. Symmetrically Centered Reference

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Rainbow-electronics ADC0809 Manuel d'utilisateur Page 11