National Instruments E Series , Digital I/O, Timing I/O

Appendix A Specifications for DAQCard-AI-16E-4
 National Instruments Corporation A-5 DAQCard E Series User Manual
Digital I/O
Number of channels .......................... 8 input/output
Compatibility.................................... TTL/CMOS
Power-on state................................... Input (High-Z)
Data transfers.................................... Programmed I/O
Timing I/O
Number of channels .......................... 2 up/down counter/timers,
1 frequency scaler
Resolution
Counter/timers............................ 24 bits
Frequency scalers........................4 bits
Compatibility.................................... TTL/CMOS
Base clocks available
Counter/timers............................ 20 MHz, 100 kHz
Frequency scalers........................10 MHz, 100 kHz
Base clock accuracy.......................... ± 0.01%
Max source frequency....................... 20 MHz
Min source pulse duration................. 10 ns in edge-detection mode
Min gate pulse duration..................... 10 ns in edge-detection mode
Data transfers.................................... DMA, interrupts, programmed
I/O
DMA modes...................................... Single transfer
Digital logic levels ..........
Level Min Max
Input low voltage 0 V 0.8 V
Input high voltage 2 V 5 V
Input low current
(Vin = 0 V) — -320
µ A
Input high current
(Vin = 5 V) — 10
µ A
Output low voltage
(I
OL
= 24 mA) — 0.4 V
Output high voltage
(I
OH
= 13 mA) 4.35 V —