PCI-82x Series Cards
Multifunction Boards
User Manual, Ver. 1.5, Jan. 2017, PMH-024-15, Page: 6
1.
Introduction
The PCI-822/826 Series cards provide 32/16-channel 12-bit (16-bit) Analog Input with a sampling rate
of up to 250 kSamples/second, and 2-channel 16-bit Analog Output with 32-channel programmable
Digital Input/Output.
1.1
Overview
The PCI-822/826 Series are high-performance multifunction cards that provide high-speed Analog
and Digital I/O functions. PCI-822/826 Series cards use a Universal PCI interface that supports both
the 3.3 V and the 5 V PCI bus. These cards feature a continuous, 250 kSamples/second, 12-bit
(16-bit) resolution A/D converter, an 8 k-Sample hardware FIFO, a 2-channel, 16-bit D/A converter,
and a 32-channel programmable Digital Input/Output and Digital Output readback. The PCI-822/826
LU provides either 32-channel single-ended or 16-channel differential Analog Input that is jumper
selectable, while the PCI-826LU is equipped with a high-speed PGA (Programmable Gain Amplifier)
featuring programmable gain controls (1, 2, 4 and 8).
PCI-822/826 Series cards contain an embedded Card ID switch and onboard pull-high/pull-low
resistors for the Digital Input, meaning that a unique ID number can be set for each card so that can
each card can be individually recognized when two or more PCI-822/826 Series cards are used in a
computer at the same time. The pull-high/pull-low resistors allow the status of the Digital Input to
be specified, meaning that when the Digital Input channels are disconnected, the status of the
Digital Input will remain as either high or low and will not be set to floating.
PCI-822/826 Series cards provide both a programmable software trigger and a pacer trigger, and
include an A/D channel scan function called MagicScan. The MagicScan controller eliminates the
majority of the effort required to acquire the A/D values, such as selecting the channel, setting the
Gain values and the settling time, triggering the ADC, and acquiring the data. Using the built-in
MagicScan and the interrupt features, these complex tasks are effectively offloaded from the CPU.
Even in channel scan mode, a different Gain code can be used for each channel, and the sampling
rate can still achieve a total of 250 kS/s, making the PCI-822/826 Series well-suited to the demands
of high-end applications.
