Manual PCIe-DA16-6
5
Chapter 1: Introduction
Features
•
6-, 4- and 2 channel, 16- or 12-bit digital-to-analog outputs PCI Express card
•
Software / Hardware compatible with PCI-DA12-6, 4 & 2, >125k conversions per channel
•
Dip-switch selectable analog output ranges of 2.5V, 5V, 10V, ±2.5V, ±5V, ±10V, 4-20mA
•
Individual or simultaneous update of the DACs
•
DACs restricted at power-on to prevent spurious outputs
•
16-bits of digital I/O
•
VCCIO voltage available to the user via 0.5A resettable fuse
•
12V available to the user via 0.2A resettable fuse
•
RoHS Available
•
Wind River VxWorks support available
Applications
Optical Networking, Instrumentation, Multichannel Data Acquisition and system
monitoring, Automatic Test Equipment, Process Control and Industrial Automation,
Power line simulation and stimulation. light control, motion control, and more.
Functional Description
Analog Outputs
These cards are 6.6” x 3.875” and can be installed in any PCI Express slot. They contain
either six, four, or two double-buffered digital-to-analog converters (DACs) that provide
independent analog output channels of 12- or 16-bit resolution. Each analog output
channel can be configured for ranges of:
0V to +2.5V
0V to +5V
0V to +10V
-2.5V to +2.5V
-5V to +5V
-10V to +10V
4mA to 20mA sink
The analog output channels have a double-buffered input for single-step update and
each is addressed at its own I/O location. Type DAC80504 quad DAC chips are used.
Data is transferred to the FPGA's local registers a byte or word at a time and then
transferred to the DAC buffer registers a word at a time. The analog outputs can then be
updated by transferring this data to the DAC active registers either independently or
simultaneously by command.
In order to prevent excessive voltage output to external circuits, the card contains
automatic circuits that set D/A outputs to 0V at system power-on. Upon power-up, the
card is in the Simultaneous Update mode. After all DACs have been loaded with the
desired values, a software command can be used to switch the reference voltage to its
normal value.
