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© 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 GΩ 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.