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National Instruments Corporation A-1 PCI-4451/4452 User Manual
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Specifications

This appendix lists the specifications of the PCI-4451/4452. 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.
Note Be sure to keep the cover on your computer to maintain forced air cooling.

Analog Input

Channel Characteristics

Number of channels............................... 2 (PCI-4451) or 4 (PCI-4452),
simultaneously sampled
Input configuration.................................true differential
Resolution.............................................. 16 bits
Type of ADC..........................................Delta-sigma, 128-times
oversampling
Sample rates........................................... 5 kS/s to 204.8 kS/s in increments
of 190.735 µS/s
Frequency accuracy................................±100 ppm
Input signal ranges................................. software-selectable
Gain
Full-Scale Range (Peak)Linear Log
0.1 −20 dB ±42.4 V
0.316 −10 dB ±31.6 V
10 dB ±10.0
3.16 +10 dB ±3.16 V
10 +20 dB ±1.00 V
User.book Page 1 Tuesday, April 14, 1998 10:20 AM