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Appendix A Specifications
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National Instruments Corporation A-5 PCI-4451/4452 User Manual
Phase linearity........................................ ±1°, Gain ≥ 0 dB,
±2°, Gain < 0 dB
Interchannel phase..................................±1°, Gain ≥ 0 dB,
±2°, Gain < 0 dB
(same configuration all input
channels)
Interchannel gain mismatch ...................±0.1dB, for all gains
(same configuration for all input
channels)
Signal delay............................................42 sample periods, any sample
rate (time from when signal enters
analog input to when digital data
is available)
Onboard Calibration Reference
DC level ................................................. 5.000 V ±2.5 mV
Temperature coefficient.........................±5 ppm/° C max
Long-term stability.................................±15 ppm/
Analog Output
♦ PCI-4451 only
Channel Characteristics
Number of channels...............................2 simultaneously updated
Output configuration..............................balanced differential
Resolution .............................................. 16 bits
Type of DAC.......................................... Delta-sigma, 64-times
oversampling
Sample rates...........................................1.25 to 51.2 kS/s in increments
of 47.684 µS/s
Frequency accuracy................................±100 ppm
1000 h,
User.book Page 5 Tuesday, April 14, 1998 10:20 AM