ADLINK PXI-2208 - Manual (Page 48)

36 Operation Theory
DAQ/DAQe/PXI-2005/2006/2016 AI Data Format
The data format of the acquired 16-bit A/D data is 2's Comple-
ment coding. Table 4-3 and Table 4-4 illustrate the valid input
ranges and the ideal transfer characteristics.
Description Bipolar Analog Input Range
Digital
code
Full-scale Range ±10V ±5V ±2.5V ±1.25V —
Least significant bit 305.2 µV 152.6 µV 76.3 µV 38.15 µV —
FSR-1LSB 9.999695V 4.999847V 2.499924V 1.249962V 7FFF
Midscale +1LSB 305.2 µV 152.6 µV 76.3 µV 38.15 µV 0001
Midscale 0V 0V 0V 0V 0000
Midscale -1LSB -305.2 µV -152.6 µV -76.3 µV -38.15 µV FFFF
-FSR -10V -5V -2.5V -1.25V 8000
Table 4-3: Bipolar Analog Input Range and Output Digital Code for DAQ/DAQe/
PXI-2205/2206
Description Unipolar Analog Input Range
Digital
code
Full-scale Range 0V to 10V 0 to +5V 0 to +2.5V 0 to +1.25V —
Least significant bit 152.6 µV 76.3 µV 38.15 µV 19.07 µV —
FSR-1LSB 9.999847V 4.999924V 2.499962V 1.249981V 7FFF
Midscale +1LSB 5.000153V 2.500076V 1.250038V 0.625019V 0001
Midscale 5V 2.5V 1.25V 0.625V 0000
Midscale -1LSB 4.999847V 2.499924V 1.249962V 0.624981V FFFF
Table 4-4: Unipolar Analog Input Range and Output Digital Code for DAQ/DAQe/
PXI-2205/2206