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Appendix A Specifications
DAQCard-1200 User Manual A-4 ni.com
Stability
Recommended warm-up time.................15 minutes
Offset temperature coefficient
Pre-gain............................................±15 µV/°C
Post-gain..........................................±100 µV/°C
Gain temperature coefficient ..................±40 ppm/°C
Analog Output
Output Characteristics
Number of Channels...............................2 voltage
Resolution...............................................12 bits, 1 in 4,096
Max update rate ......................................20 kS/s
1
Type of DAC ..........................................Double buffered
Data transfers..........................................Interrupts, programmed I/O
Transfer Characteristics
Relative accuracy (INL) .........................±0.5 LSB typ, ±1 LSB max
DNL........................................................±0.5 LSB typ, ±0.9 LSB max
Monotonicity ..........................................12 bits, guaranteed
Offset error
After calibration...............................±0.5 mV max
Before calibration............................±75 mV max
Gain error (relative to internal reference)
After calibration...............................±0.02% of reading max
Before calibration............................±2% of reading max
1
If you perform simultaneous AI and AO, reliable continuous rates are limitedto 0.5 to 1 kS/s and are configuration dependent.