Appendix A Specifications
© National Instruments Corporation A-5 NI 7831R User Manual
Digital logic levels
Maximum output current
Imax (source).....................................5.0 mA
Imax (sink)........................................5.0 mA
Input leakage current..............................±10 µA
Power-on state........................................Programmable, by line
Data transfers......................................... Interrupts, programmed I/O
Protection
Input................................................–0.5 to 7.0 V
Output............................................. Short-circuit (up to eight lines
may be shorted at a time)
Reconfigurable FPGA
Number of logic slices........................... 5,120
Equivalent number of logic cells.... 11,520
Available embedded RAM.....................81,920 bytes
Timebase................................................40, 80, 120, 160, or 200 MHz
Timebase reference sources
NIPCI-7831R .................................Onboard clock only
NIPXI-7831R .................................Onboard clock, phase-locked to
PXI 10 MHz clock
Timebase accuracy
Onboard clock.................................±100 ppm, 250 ps jitter
Level Min Max
Input low voltage (VIL)
Input high voltage (VIH)
0.0 V
2.0 V
0.8 V
5.5 V
Output low voltage (VOL),
where IOUT = –Imax (sink)
Output high voltage (VOH),
where IOUT = Imax (source)
—
2.4 V
0.4 V
—