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Digital I/O
© National Instruments Corporation
Voltage Output
Ranges .................................................... 0 to 10 V, ±5 V software
Output coupling...................................... DC
Output impedance .................................. 0.5 Ω typ
Current drive ......................................... 1 mA max per channel
Protection ............................................... 80 mA momentary short-circuit
Power-on state
0 to 110 ms...................................... +2 V to –5 V
>110 ms........................................... 0 V (±mV)
Dynamic Characteristics
Settling time to full-scale step................ 20 µs to ±1 LSB accuracy
Noise ...................................................... 400 µV
Stability
Offset temperature coefficient ............... ±50 µV/°C
Gain temperature coefficient.................. ±30 ppm/°C
Number of channels ............................... 24 I/O (three 8-bit ports;
Compatibility ......................................... TTL
Power-on state........................................ All ports high-impedance inputs
selectable
protection to ground
uses the 82C55A PPI)
A-5
Appendix A
Specifications
typ, DC to 1 MHz
rms
DAQCard-1200 User Manual
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