ADLINK DAQe-2214 - Manual (Page 42)

30 Operation Theory
DAQ-/DAQe-2213/2214 AI Data Format
The data format of the acquired 16-bit A/D data is two's comple-
ment coding. Table 4-1 and Table 4-2 illustrate the valid input
ranges and the ideal transfer characteristics.
Description Bipolar Analog Input Range
Digital
code
Full-scale Range ±10 V ±5 V ±2.5 V ±1.25 V —
Least significant bit 305.2 µV 152.6 µV 76.3 µV 38.15 µV —
FSR-1LSB 9.999695 V 4.999847 V 2.499924 V 1.249962 V 7FFF
Midscale +1LSB 305.2 µV 152.6 µV 76.3 µV 38.15 µV 0001
Midscale 0 V 0 V 0 V 0 V 0000
Midscale -1LSB -305.2 µV -152.6 µV -76.3 µV -38.15 µV FFFF
-FSR -10 V -5 V -2.5 V -1.25 V 8000
Table 4-1: 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 10 V 0 to +5 V 0 to +2.5 V 0 to +1.25 V —
Least significant bit 152.6 µV 76.3 µV 38.15 µV 19.07 µV —
FSR-1LSB 9.999847 V 4.999924 V 2.499962 V 1.249981 V 7FFF
Midscale +1LSB 5.000153 V 2.500076 V 1.250038 V 0.625019 V 0001
Midscale 5 V 2.5 V 1.25 V 0.625 V 0000
Midscale -1LSB 4.999847 V 2.499924 V 1.249962 V 0.624981 V FFFF
Table 4-2: Unipolar Analog Input Range and Output Digital Code for DAQ/DAQe/
PXI-2205/2206