User`s manual

4Introduction
Analog Input (AI)
X Number of channels: 4 single-ended for DAQ/PXI-2502, 8
single-ended for DAQ/PXI-2501
X AD converter: LTC1416
X Max sampling rate: 400KS/s
X Resolution: 14 bits
X FIFO buffer size: 2K samples
X Input range: Bipolar: ±10V, unipolar: 0~10V
X Over voltage protection: Continuous ±35V maximum
X Input impedance: 1GΩ | 6pF
X Trigger mode: Pre-trigger, post-trigger, middle-trigger, and
delay trigger
X Data transfers: Programmed I/O, and bus-mastering DMA
with scat-ter/gather
X Input coupling: DC
X Offset error:
Z Before calibration: ±40mV max
Z After calibration: ±1mV max
X Gain error:
Z Before calibration: ±0.4 % of output max
Z After calibration: ±1mV of output max
General Purpose Digital I/O (G.P. DIO)
X Number of channels: 24 programmable Input/Output
X Compatibility: TTL/CMOS
X Input voltage:
Z Logic Low: VIL=0.8V max.; IIL=0.2mA max.
Z High: VIH=2.0V max.; IIH=0.02mA max
X Output voltage:
Z Low: VOL=0.5 V max.; IOL=8mA max.
Z High: VOH=2.7V min; IOH=400μA