National Instruments 700 - Manual (Page 47)

© National Instruments Corporation A-1 DAQCard-700 User Manual
Appendix A
Specifications
This appendix lists the specifications of the DAQCard-700. These specifications are typical at 25
°
C unless
otherwise noted. The operating temperature range is 0
°
to 70
°
C.
Analog Input
Input Characteristics
Number of channels ............................................................... 16 single-ended or 8 differential software selectable
Type of ADC .......................................................................... Successive approximation
Resolution............................................................................... 12 bits, worst-case code range -2024 to +2023
(due to software calibration)
Max sampling rate .................................................................. 100 kS/s 1
Input signal ranges .................................................................
±
10 V,
±
5 V,
±
2.5 V software selectable
Input coupling ........................................................................ DC
Max working voltage
(signal + common mode) ................................................ Each input should remain within
±
9.5 V of AIGND
(in Diff mode)
Overvoltage protection ...........................................................
±
30 V powered on,
±
30 V powered off
Inputs protected ...................................................................... ACH<0..15>
FIFO buffer size ..................................................................... 512 samples
Data transfers ......................................................................... Interrupts, programmed I/O
Transfer Characteristics
Relative accuracy ...................................................................
±
1 LSB typ,
±
1.5 LSB max
DNL .......................................................................................
±
0.5 LSB typ,
±
1 LSB max
No missing codes ................................................................... 12 bits, guaranteed
Offset error
After software calibration ...............................................
±
1 LSB
Before software calibration .............................................
±
2 LSB typ,
±
9 LSB max
Gain error (relative to calibration reference)
After software calibration ...............................................
±
0.036% max
Before software calibration .............................................
±
0.07% of reading typ,
±
0.4% max
Amplifier Characteristics
Input impedance ..................................................................... 1 G
Ω
in parallel with 40 pF
CMRR (all input ranges) ........................................................ -72 dB, DC to 60 Hz
1
Please refer to the Dynamic Characteristics section for maximum scan rates with stated accuracy.