Measurement Computing miniLAB 1008, Руководство пользователя, Страница: 54 / 78

miniLAB 1008 User's Guide Functional Details
The accuracy plots in Figure 4-10 are drawn for clarity and are not drawn to scale.
-FS
+FS
Input Voltage
0
4095
2
Offset=9.77mV
Ideal
Actual
Output Code
9.77mV
2048
Figure 4-10. ADC transfer function with offset error
Gain error is a change in the slope of the transfer function from the ideal, and is typically
expressed as a percentage of full-scale.
shows the miniLAB 1008 transfer
function with gain error. Gain error is easily converted to voltage by multiplying the
full-scale (FS) input by the error.
Figure 4-11
Figure 4-11. ADC Transfer function with gain error
The accuracy plots in Figure 4-11 are drawn for clarity and are not drawn to scale.
-FS
+FS
Input Voltage
0
4095
Actual
Ideal
Output Code
Gain error=+0.2%, or +20 mV
Gain error=-0.2%, or -20 mV
2048
4-14