UMDAS 0802DA User's Guide | Functional Details |
The accuracy plots in Figure 3-12are drawn for clarity and are not drawn to scale.
Input Voltage
| +10V | Ideal | Gain error = +0.02% or +2 mV |
| Gain error = -0.02%, or -2 mV |
| | |
Actual
Output Code
-10V
Figure 3-12. ADC Transfer function with gain error
Figure 3-12shows an example of a UMDAS 0802DA transfer function with a calibrated gain error of ±0.02%, or ±2 mV. This means that at full scale, neglecting the effect of offset for the moment, the measurement would be within 2 mV of the actual value. Note that gain error is expressed as a ratio. Values near ±FS are more affected from an absolute voltage standpoint than are values near mid-scale, which see little or no voltage error.
Combining these two error sources in Figure 3-13,we have a plot of the error band of the UMDAS 0802DA for the ±10 V range. This is a graphical version of the typical accuracy specification of the product.
The accuracy plots in Figure 3-13are drawn for clarity and are not drawn to scale
Input Voltage
Ideal +2.44 mV + 2 mV
+10V
Ideal
Ideal -(2.44 mV + 2 mV)
Ideal +2.44 mV + 2 mV
Ideal -(2.44 mV + 2 mV)
Figure 3-13. Error band plot