ADC0808 National Semiconductor, ADC0808 Datasheet - Page 11

• Manufacturer Part Number: ADC0808
• Description: 8-Bit uP Compatible A/D Converters with 8-Channel Multiplexer
• Manufacturer: National Semiconductor

Applications Information
R
3.0 CONVERTER EQUATIONS
The transition between adjacent codes N and N+1 is given
by:
The center of an output code N is given by:
*
Ratiometric transducers
A
= R
B
FIGURE 12. Typical Reference and Supply Circuit
FIGURE 13. Symmetrically Centered Reference
(Continued)
(2)
(3)
11
The output code N for an arbitrary input are the integers
within the range:
Where: V
V
V
V
V
IN
REF(+)
REF(−)
TUE
REF(+)
= Voltage at comparator input
= Total unadjusted error voltage (typically
= Voltage at Ref(+)
= Voltage at Ref(−)
÷ 512)
DS005672-26
DS005672-27
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(4)