Appendix A Specifications - National Instruments NI 447 Series User Manual

Specifications
Be sure to keep the filler panels on all unused slots in your chassis or computer to
Note
maintain forced air cooling.
Analog Input
© National Instruments Corporation
This appendix lists the specifications of the NI 447X. These specifications
are typical at 25 °C unless otherwise noted. The system must be allowed to
warm up for 15 minutes to achieve the rated accuracy.
Channel Characteristics
Number of channels
NI PCI/PXI-4472/4472B ................ 8, simultaneously sampled
NI PCI-4474.................................... 4, simultaneously sampled
Input configuration................................. Unbalanced differential
Resolution .............................................. 24 bits, nominal
Type of ADC.......................................... Delta-sigma
Oversampling, for sample rate (f
1.0 kS/s ≤ f ≤ 51.2 kS/s........... 128 f
s
51.2 kS/s < f
s
Sample rates (f ) ..................................... 102.4 kS/s down to 1.0 kS/s
s
Frequency accuracy................................ ±25 ppm
Input signal range................................... ±10 V
FIFO buffer size ..................................... 1,024 samples
Data transfers ......................................... DMA
):
s
≤ 102.4 kS/s....... 64 f
in 190.7 µS/s increments
for f
increments for f
A-1
A
s
s
> 51.2 kS/s or 95.37 µS/s
s
≤ 51.2 kS/s
s
peak
NI 447X User Manual