National Instruments FW-7344 Hardware User Manual page 47

Digital I/O
© National Instruments Corporation
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, 0–5 V
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
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
A-5
Appendix A Specifications
7344/7334 Hardware User Manual