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Appendix A Specifications
© National Instruments Corporation A-5 7344/7334 Hardware User Manual
Analog inputs
Number of inputs ............................8, multiplexed
Number for user signals........... 4
Number for calibration ............ 4
Voltage range (programmable).......±10 V, ±5 V, 0–10 V, 0–5V
Input resistance ...............................10 kΩ min
Resolution.......................................12 bits
Analog reference output.................. 7.5 V (nominal)
Reference drift ................................±30 ppm/°C typical
INL..................................................±1 LSB
DNL ................................................±1 LSB
Offset error
Unipolar...................................±5 LSB
Bipolar ..................................... ±10 LSB
Gain error
Unipolar...................................±10 LSB
Bipolar ..................................... ±10 LSB
Conversion time..............................6 µs
Multiplexor scan rate ...................... 50 µs/enabled channel
Analog outputs (7344 only)
Number of outputs ..........................4
Voltage range.................................. ±10 V
Output current................................. ±5 mA
Resolution .......................................16 bits (0.000305 V/LSB)
Gain accuracy ................................. ±3%
Drift................................................. 100 ppm/°C typical
Digital I/O
Ports .......................................................4, 8-bit ports
Line direction..................................Individual bit programmable
Inputs
Voltage range.................................. 0 to 5 V
Input low voltage.....................0.8 V
Input high voltage....................2.0 V