National Instruments AT-MIO-16X - Manual (Page 138)

Chapter 4 Register Map and Descriptions
AT-MIO-16X User Manual 4-42 © National Instruments Corporation
The formula for the voltage output versus digital code for a bipolar
analog output configuration in two’s complement form is as follows:
V
out = V ref
* (digital code)
32,768
where V
ref
is the positive reference voltage applied to the analog output
channel. The digital code in the preceding formula is a decimal value
ranging from –32,768 to +32,767.
Table 4-10. Analog Output Voltage Versus Digital Code (Unipolar Mode)
Digital Code Voltage Output
Decimal Hex V
ref = 10 V
0 0000 0.0 V
1 0001 152.6
µ
V
16,384 4000 2.5 V
32,768 8000 5.0 V
49,152 C000 7.5 V
65,535 FFFF 9.999847 V
Table 4-11. Analog Output Voltage Versus Digital Code (Bipolar Mode)
Digital Code Voltage Output
Decimal Hex Reference = 10 V
–32,768 8000 –10.0 V
–32,767 8001 –9.999695 V
–16,384 C000 –5.0 V
–1 FFFF –305.2
µ
V
0 0000 0.0 V
1 0001 305.2
µ
V