National Instruments AT-MIO-64F-5, User Manual

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Chapter 4 Register Map and Descriptions
© National Instruments Corporation 4-25 AT-MIO-64F-5 User Manual
Table 4-7. Straight Binary Mode A/D Conversion Values
Input Voltage A/D Conversion Result
(Gain = 1) Range: 0 to 10 V
Decimal Hex
0 V 0 0000
2.44 mV 1 0001
2.5 V 1,024 4000
5.0 V 2,048 8000
7.5 V 3,072 C000
9.999847 V 4,095 FFFF
To convert from the ADC FIFO value to the input voltage measured, use the following formula:
V = ADC reading * 10 V
4,096 Gain
Table 4-8. TwoÕs Complement Mode A/D Conversion Values
A/D Conversion Result
Input Voltage
Range: -10 to +10 V
(Gain = 0.5)
Decimal Hex
-10.0 V
-9.9951 V
-5 V
-4.88 mV
0.0 V
4.88 mV
5 V
9.9951 V
-2,048
-2,047
-1,024
-1
0
1
1,024
2,047
F800
F801
FC00
FFFF
0000
0001
0400
07FF
To convert from the ADC FIFO value to the input voltage measured, use the following formula:
V = ADC reading * 5 V
2,048 Gain