Unipolar Input Mode A/D Conversion Values; Table - National Instruments PC-LPM-16/PnP User Manual

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A/D FIFO Output Binary Modes
The A/D conversion result stored in the A/D FIFO is a 16-bit two's
complement value. It is made of 13-bit magnitude and 3-bit sign
extension. If the analog input range is unipolar 0 to +10 V or unipolar
0 to +5 V, use the positive values only, making the resolution 12-bit. If
the analog input range is 5 V or 2.5 V, you can divide the result by
two to yield a 12-bit resolution reading. Also, if you want, the full 13-bit
resolution can be used with the bipolar ranges. Notice, however, that in
Appendix A, Specifications, LSB refers to the least significant bit of a
12-bit conversion value. Table D-2 shows input voltage versus A/D
conversion values for the 0 to +10 V input range. Table D-3 shows
input voltage versus A/D conversion values for -5 to +5 V input range.
Table D-2.
Input Voltage
0
2.5
5.0
7.5
9.9976
Appendix D

Unipolar Input Mode A/D Conversion Values

A/D Conversion Result
(Decimal)
0
1,024
2,048
3,072
4,095
D-29
Register-Level Programming
Range: 0 to +10 V
(Hex)
0000
0400
0800
0C00
0FFF
PC-LPM-16/PnP User Manual