Measurement Computing PCI-DDA08/12 User manual

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PCI-DDA08/12
Analog Output and Digital I/O
User's Guide
Document Revision 2, July, 2006
© Copyright 2006, Measurement Computing Corporation
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Your new Measurement Computing product comes with a fantastic extra —
Management committed to your satisfaction!
Refer to www.mccdaq.com/execteam.html for the names, titles, and contact information of each key executive at Measurement
Computing.
Thank you for choosing a Measurement Computing product—and congratulations! You own the finest, and you can now enjoy
the protection of the most comprehensive warranties and unmatched phone tech support. It’s the embodiment of our two
missions:
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!To offer our customers superior post-sale support—FREE. Whether providing unrivaled telephone technical and sales
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systems, we’re committed to you!
Lifetime warranty: Every hardware product manufactured by Measurement Computing Corporation is warranted against
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Corporation that is damaged (even due to misuse) for only 50% of the current list price. I/O boards face some tough operating
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30 Day Money Back Guarantee: You may return any Measurement Computing Corporation product within 30 days of
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ii
HM PCI-DDA08-12.doc
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Trademark and Copyright Information
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Notice
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Measurement Computing Corporation products are not designed with the components required, and are not subject
to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of people.
iii
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Table of Contents
Preface
About this User's Guide .......................................................................................................................v
What you will learn from this user's guide.........................................................................................................v
Conventions in this user's guide .........................................................................................................................v
Where to find more information.........................................................................................................................v
Chapter 1
Introducing the PCI-DDA08/12......................................................................................................... 1-1
Overview: PCI-DDA08/12 features ............................................................................................................... 1-1
Software features............................................................................................................................................ 1-1
PCI-DDA08/12 block diagram....................................................................................................................... 1-2
Chapter 2
Installing the PCI-DDA08/12............................................................................................................. 2-1
What comes with your PCI-DDA08/12 shipment? ........................................................................................ 2-1
Hardware ....................................................................................................................................................................... 2-1
Additional documentation.............................................................................................................................................. 2-1
Optional components ..................................................................................................................................................... 2-1
Unpacking the PCI-DDA08/12 ...................................................................................................................... 2-2
Installing the software .................................................................................................................................... 2-2
Installing the PCI-DDA08/12......................................................................................................................... 2-2
Connecting the board for I/O operations ........................................................................................................ 2-2
Connectors, cables – main I/O connector ...................................................................................................................... 2-2
Pin out – main I/O connector ......................................................................................................................................... 2-3
Field wiring, signal termination and conditioning ......................................................................................................... 2-4
Chapter 3
Programming and Developing Applications .................................................................................. 3-1
Programming languages ................................................................................................................................. 3-1
Packaged applications programs .................................................................................................................... 3-1
Register-level programming ........................................................................................................................... 3-1
Chapter 4
Functional Details ............................................................................................................................. 4-1
Analog connections ........................................................................................................................................ 4-1
Digital connections......................................................................................................................................... 4-1
Pull up and pull down resistors...................................................................................................................................... 4-1
Chapter 5
Calibrating the PCI-DDA08/12.......................................................................................................... 5-1
Self-calibrating ............................................................................................................................................... 5-1
Calibration configuration................................................................................................................................ 5-1
"In-system" calibration ................................................................................................................................... 5-2
Chapter 6
Specifications.................................................................................................................................... 6-1
Power consumption ........................................................................................................................................ 6-1
Analog output ................................................................................................................................................. 6-1
Digital input / output ...................................................................................................................................... 6-2
Environmental ................................................................................................................................................ 6-2
Main connector and pin out............................................................................................................................ 6-2
iv
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Preface
About this User's Guide
What you will learn from this user's guide
This user's guide explains how to install, configure, and use the PCI-DDA08/12 so that you get the most out of
its analog output and digital I/O features.
This user's guide also refers you to related documents available on our web site, and to technical support
resources.
Conventions in this user's guide
For more information on …
Text presented in a box signifies additional information and helpful hints related to the subject matter you are
reading.
Caution! Shaded caution statements present information to help you avoid injuring yourself and others,
damaging your hardware, or losing your data.
<#:#> Angle brackets that enclose numbers separated by a colon signify a range of numbers, such as those assigned
to registers, bit settings, etc.
bold text Bold text is used for the names of objects on the screen, such as buttons, text boxes, and check boxes. For
example:
1. Insert the disk or CD and click the OK button.
italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase. For
example:
The InstaCal installation procedure is explained in the Quick Start Guide.
Never touch the exposed pins or circuit connections on the board.
Where to find more information
The following electronic documents provide information relevant to the operation of the PCI-DDA08/12.
!MCC's Specifications: PCI-DDA08/12 (the PDF version of the Specifications chapter in this guide) is
available on our web site at www.mccdaq.com/pdfs/PCI-DDA08-12.pdf.
!MCC's Quick Start Guide is available on our web site at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf.
!MCC's Guide to Signal Connections is available on our web site at
www.mccdaq.com/signals/signals.pdf.
!MCC's Universal Library User's Guide is available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-user-guide.pdf.
!MCC's Universal Library Function Reference is available on our web site at
www.mccdaq.com/PDFmanuals/sm-ul-functions.pdf.
!MCC's Universal Library for LabVIEW™User’s Guide is available on our web site at
www.mccdaq.com/PDFmanuals/SM-UL-LabVIEW.pdf.
PCI-DDA08/12 User's Guide (this document) is also available on our web site at
www.mccdaq.com/PDFmanuals/PCI-DDA08-12.pdf.
v
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Chapter 1
Introducing the PCI-DDA08/12
Overview: PCI-DDA08/12 features
This manual explains how to install and use the PCI-DDA08/12 board. The PCI-DDA08/12 provides eight
channels of 12-bit analog output and 48-bits of digital I/O.
The D/A converters can be independently configured for either Bipolar or Unipolar. Bipolar ranges are ±10 V,
±5 V, and ±2.5 V. Unipolar ranges are 0 to 10 V, 0 to 5 V, and 0 to 2.5 V. The outputs may be updated
individually or simultaneously. The range settings are software-selectable.
The digital I/O ports are configured as two 82C55 mode 0 emulations. Each group is divided into three 8-bit
ports — Port A, Port B, and Port C. Port C can be split into two four-bit ports — Port C-HI and Port C-LO.
Each of these ports may be individually programmed as input or output. The digital outputs are capable of
sinking 64 mA and sourcing 15 mA utilizing standard "S" logic.
The PCI interface uses the PLX 9052 chip, which is a slave-only device. The PCI interface for the analog
output is configured in a 16-bit, multiplexed address/data bus, I/O access mode. The PCI interface for the
digital I/O is configured in an 8-bit, multiplexed address/data bus, I/O access mode to be register-compatible
with the PCI-DIO48H and PCI-DIO96H boards.
The PCI-DDA08/12 board is completely plug-and-play, with no jumpers or switches to set. All board addresses
are set by the board's plug-and-play software. Board configuration is controlled by your system's BIOS.
Software features
For information on the features of InstaCal and the other software included with your PCI-DDA08/12, refer to
the Quick Start Guide that shipped with your device. The Quick Start Guide is also available in PDF at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf.
Check www.mccdaq.com/download.htm for the latest software version or versions of the software supported
under less commonly used operating systems.
1-1
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PCI-DDA08/12 User's Guide Introducing the PCI-DDA08/12
PCI-DDA08/12 block diagram
PCI-DDA08/12 functions are illustrated in the block diagram shown here.
PCI
Controller
BADR0
BADR1
BADR2
BADR3
Boot
EEPROM
DAC
Data
Control
Vout 0
V
1out
12-bit
DAC0
PCI Bus (5V, 32-bit, 33 MHZ)
33 MHz Local Bus
V 2out
V
3out
V
4out
V
5out
V
6out
V
7out
Calibration
Control
Output
DAC
Control
Decode/Status
Controller
PLD
PAL
Digital I/O
Controller
Decode/Status
Gain Autocal Offset Autocal
12-bit
DAC1
12-bit
DAC2
12-bit
DAC3
12-bit
DAC4
12-bit
DAC5
12-bit
DAC6
12-bit
DAC7
100-Pin I/O Connector
SECONDPORTA
SECONDPORTB
Control
Digital I/O
SECONDPORT
SECONDPORTCH
SECONDPORTCL
8
8
4
4
FIRSTPORTA
FIRSTPORTB
Control
Digital I/O
FIRSTPORT
FIRSTPORTCH
FIRSTPORTCL
8
8
4
4
Figure 1-1. PCI-DDA08/12 functional block diagram
1-2
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Chapter 2
Installing the PCI-DDA08/12
What comes with your PCI-DDA08/12 shipment?
The following items are shipped with the PCI-DDA08/12.
Hardware
!PCI-DDA08/12
Additional documentation
In addition to this hardware user's guide, you should also receive the Quick Start Guide (available in PDF at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf). This booklet supplies a brief description of
the software you received with your PCI-DDA08/12 and information regarding installation of that software.
Please read this booklet completely before installing any software or hardware.
Optional components
!C100FF-x cable
!Signal termination and conditioning accessories
MCC provides signal termination products for use with the PCI-DDA08/12. Refer to Field wiring, signal
termination and conditioning on page 2-4 for a complete list of compatible accessory products.
2-1
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PCI-DDA08/12 User's Guide Installing the PCI-DDA08/12
Unpacking the PCI-DDA08/12
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the PCI-DDA08/12 from its packaging, ground yourself using a wrist strap or by
simply touching the computer chassis or other grounded object to eliminate any stored static charge.
If any components are missing or damaged, notify Measurement Computing Corporation immediately by
phone, fax, or e-mail:
!Phone: [phone] and follow the instructions for reaching Tech Support.
!Fax: [phone] to the attention of Tech Support
!Email: [e-mail]
Installing the software
Refer to the Quick Start Guide for instructions on installing the software on the Measurement Computing Data
Acquisition Software CD. This booklet is available in PDF at www.mccdaq.com/PDFmanuals/DAQ-Software-
Quick-Start.pdf.
Installing the PCI-DDA08/12
The PCI-DDA08/12 board is completely plug-and-play. There are no switches or jumpers to set. Configuration
is controlled by your system's BIOS. To install your board, follow the steps below.
Install the MCC DAQ software before you install your board
The driver needed to run your board is installed with the MCC DAQ software. Therefore, you need to install
the MCC DAQ software before you install your board. Refer to the Quick Start Guide for instructions on
installing the software.
1.
2.
3.
Turn your computer off, open it up, and insert your board into an available PCI slot.
Close your computer and turn it on.
If you are using an operating system with support for plug-and-play (such as Windows 2000 or
Windows XP), a dialog box pops up as the system loads indicating that new hardware has been detected. If
the information file for this board is not already loaded onto your PC, you will be prompted for the disk
containing this file. The MCC DAQ software contains this file. If required, insert the Measurement
Computing Data Acquisition Software CD and click OK.
To test your installation and configure your board, run the InstaCal utility you installed in the previous
section. Refer to the Quick Start Guide that came with your board www.mccdaq.com/PDFmanuals/DAQ-
Software-Quick-Start.pdf for information on how to initially set up and load InstaCal.
Connecting the board for I/O operations
Connectors, cables – main I/O connector
Table 2-1
Table 2-1. Board connectors, cables, accessory equipment
lists the board connectors, applicable cables and compatible accessory boards.
Connector type 100-pin, high density connector
Compatible cables C100FF-x unshielded ribbon cable (x = length in feet)
2-2
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PCI-DDA08/12 User's Guide Installing the PCI-DDA08/12
Compatible accessory products with the
C100FF-x cable
SCB-50
CIO-TERM100
CIO-MINI50 (two required)
The PCI-DDA08/12 uses a single 100-pin high density connector on the back plate of the board to bring out all
required digital and analog lines and grounds.
Pin out – main I/O connector
Table 2-2. I/O connector pin out
Signal name Pin Pin Signal name
Digit
al Ground
100
•
•
50
Digital Ground
+5V 99
•
•
49 NC
FIRSTPORTC Bit 0 98
•
•
48 NC
FIRSTPORTC Bit 1 97
•
•
47 NC
FIRSTPORTC Bit 2 96
•
•
46 NC
FIRSTPORTC Bit 3 95
•
•
45 NC
FIRSTPORTC Bit 4 94
•
•
44 NC
FIRSTPORTC Bit 5 93
•
•
43 NC
FIRSTPORTC Bit 6 92
•
•
42 NC
FIRSTPORTC Bit 7 91
•
•
41 NC
FIRSTPORTB Bit 0 90
•
•
40 NC
FIRSTPORTB Bit 1 89
•
•
39 NC
FIRSTPORTB Bit 2 88
•
•
38 NC
FIRSTPORTB Bit 3 87
•
•
37 NC
FIRSTPORTB Bit 4 86
•
•
36 NC
FIRSTPORTB Bit 5 85
•
•
35 NC
FIRSTPORTB Bit 6 84
•
•
34 NC
FIRSTPORTB Bit 7 83
•
•
33 NC
FIRSTPORTA Bit 0 82
•
•
32 NC
FIRSTPORTA Bit 1 81
•
•
31 NC
FIRSTPORTA Bit 2 80
•
•
30 NC
FIRSTPORTA Bit 3 79
•
•
29 NC
FIRSTPORTA Bit 4 78
•
•
28 NC
FIRSTPORTA Bit 5 77
•
•
27 NC
FIRSTPORTA Bit 6 76
•
•
26 NC
FIRSTPORTA Bit 7 75
•
•
25 NC
SECONDPORTC Bit 0 74
•
•
24 NC
SECONDPORTC Bit 1 73
•
•
23 NC
SECONDPORTC Bit 2 72
•
•
22 NC
SECONDPORTC Bit 3 71
•
•
21 NC
SECONDPORTC Bit 4 70
•
•
20 NC
SECONDPORTC Bit 5 69
•
•
19 NC
SECONDPORTC Bit 6 68
•
•
18 NC
SECONDPORTC Bit 7 67
•
•
17 NC
SECONDPORTB Bit 0 66
•
•
16 Analo
g
Ground
SECONDPORTB Bit 1 65
•
•
15 Vout 7
SECONDPORTB Bit 2 64
•
•
14 Analo
g
Ground
SECONDPORTB Bit 3 63
•
•
13 Vout 6
SECONDPORTB Bit 4 62
•
•
12 Analo
g
Ground
SECONDPORTB Bit 5 61
•
•
11 Vout 5
SECONDPORTB Bit 6 60
•
•
10 Analo
g
Ground
SECONDPORTB Bit 7 59
•
•
9 Vout 4
SECONDPORTA Bit 0 58
•
•
8 Analo
g
Ground
SECONDPORTA Bit 1 57
•
•
7 Vout 3
SECONDPORTA Bit 2 56
•
•
6 Analo
g
Ground
SECONDPORTA Bit 3 55
•
•
5 Vout 2
SECONDPORTA Bit 4 54
•
•
4 Analo
g
Ground
SECONDPORTA Bit 5 53
•
•
3 Vout 1
SECONDPORTA Bit 6 52
•
•
2 Analog Ground
SECONDPORTA Bit 7 51
•
•
1 Vout 0
PCI slot ↓
2-3
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PCI-DDA08/12 User's Guide Installing the PCI-DDA08/12
1
50
2
49
51
100
52
99
10050
511
Key
Key
The red stripe
identifies pin # 1
The red stripe
identifies pin # 51
Cable is labeled
“Pins 51-100”
Cable is labeled
“Pins 1-50”
Connect to the board’s
100-pin I/O connector.
Pin 1 is indicated by an
arrow on the connector.
!
Figure 2-1. C100FF-x cable
Details on the C100FF-x cable are available on our web site at
www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=104&pf_id=21.
Information on signal connections
General information regarding signal connection and configuration is available in the Guide to Signal
Connections. This document is available on our web site at www.mccdaq.com/signals/signals.pdf.
Field wiring, signal termination and conditioning
You can use the following screw terminal boards to terminate field signals and route them into the PCI-
DDA08/12 using the C100FF-x cable:
!SCB-50 – 50 conductor, shielded signal connection/screw terminal box provides two independent 50-pin
connections. Details on this product are available on our web site at
www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=196&pf_id=1168.
!CIO-TERM100 – 100-pin screw terminal board (daisy-chained 50-pin IDC connectors). Details on this
product are available on our web site at
www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=102&pf_id=281.
!CIO-MINI50 – 50-pin screw terminal board. Two boards are required. Details on this product are available
on our web site at www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=102&pf_id=258.
2-4
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Chapter 3
Programming and Developing Applications
After following the installation instructions in Chapter 2, your board should now be installed and ready for use.
Programming languages
Measurement Computing’s Universal Library™ provides access to board functions from a variety of Windows
programming languages. If you are planning to write programs, or would like to run the example programs for
Visual Basicor any other language, please refer to the Universal Library User's Guide (available on our web
site at www.mccdaq.com/PDFmanuals/sm-ul-user-guide.pdf).
Packaged applications programs
Many packaged application programs, such as SoftWIREand HP-VEE™, now have drivers for your board. If
the package you own does not have drivers for your board, please fax or e-mail the package name and the
revision number from the install disks. We will research the package for you and advise how to obtain drivers.
Some application drivers are included with the Universal Library package, but not with the application package.
If you have purchased an application package directly from the software vendor, you may need to purchase our
Universal Library and drivers. Please contact us by phone, fax or e-mail:
!Phone: [phone] and follow the instructions for reaching Tech Support.
!Fax: [phone] to the attention of Tech Support
!Email: [e-mail]
Register-level programming
You should use the Universal Library or one of the packaged application programs mentioned above to control
your board. Only experienced programmers should try register-level programming.
If you need to program at the register level in your application, refer to the Register Map for the
PCI-DDA0x/12 Series. This document is available at on our web site at
www.mccdaq.com/registermaps/RegMapPCI-DDA0x-12.pdf.
3-1
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Chapter 4
Functional Details
Analog connections
The analog output connections on the PCI-DDA08/12 series are two-wire hookups. One wire connects to the
signal labeled Vout #, where # is the channel number from 0 to 7. The other wire connects to the associated
analog ground. The I/O connector pin out is shown in on page 2-3.Table 2-2
Analog ranges are software-selectable for ±10 V, ±5 V, ±2.5 V, 0 to 10 V, 0 to 5 V, and 0 to 2.5 V. Each port
may be reconfigured easily and quickly.
Digital connections
The PCI-DDA08/12 emulates two 82C55 chips, but offers much higher drive capability than the 82C55. The
board emulates only Mode 0 of the 82C55 (no strobed I/O or bi-directional I/O bits). The PCI-DDA08/12 is
completely plug-and-play, without any onboard user configurable switches or jumpers. The 48 CMOS/TTL
compatible digital I/O lines are configured in four banks of eight and four banks of four. You can configure
each bank for input or output.
All of the digital outputs/inputs on the PCI-DDA08/12 connector are TTL-compatible. TTL is an electronics
industry term, short for Transistor Transistor Logic, a standard for digital signals which are either at near 0V or
near 5V. The outputs are capable of sinking 64 mA or sourcing 15 mA. All I/O is brought out to the 100-pin
connector, which also allows connection to the computer's +5 volt and ground.
Unconnected inputs float
Unconnected inputs typically float high, but not reliably. If you are using a PCI-DDA08/12 board for input and
have unconnected inputs, ignore the data from those lines. You do not have to terminate input lines.
Unconnected lines will not affect the performance of connected lines. Ensure that you mask out any
unconnected bits in software.
Pull up and pull down resistors
Whenever the board is powered-on or reset, all ports are set to input mode. To drive all outputs to a known state
after power on or reset, pull all pins either high or low through a 2.2 KΩresistor.
!The pull-up resistor pulls the input to a high state (+5V). Its resistance of 2200 ohms draws only 2 mA of
the 64 mA available from the output.
!A 2200 ohm pull-down resistor does the same task, except that the line is pulled low when the board is in
the input mode, and uses only 2 mA of the 15 mA available output provided by the board.
The PCI-DDA08/12 board has open positions for up to six Single Inline Package (SIPs) resistors. The locations
are marked Port 0A, 0B, and 0C, and Port 1A, 1B, and 1C, and are adjacent to the I/O connector. Port 0n
corresponds to FIRSTPORTn, and Port 1ncorresponds to SECONDPORTn.
The SIP resistors provide either pull-up or pull-down action for each eight-line port, depending on their
orientation in the port positions on the board.
The SIP is made up of eight 2.2 KΩresistors. One side of each resistor is connected to a single common point
and brought out to a pin. The common line is marked with a dot or line at one end of the SIP. The remaining
resistor ends are brought out to the other eight pins (refer to ).Figure 4-1
4-1
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PCI-DDA08/12 User's Guide Functional Details
2.2 KOhm SIP
Dot
(LO or HI)
I/O Lines
Figure 4-1. Eight-Resistor SIP Schematic
You can install the SIP as either pull-up or pull-down. At each location there are 10 holes in a line. One end of
the line is +5V, the other end is GND. They are marked HI and LO respectively. The eight holes in the middle
are connected to the eight lines of a port.
!For a pull-up function per port, mount the SIP with the common pin (marked with a dot or line) in the HI
position.
!For a pull-down function per port, mount the SIP with the common pin in the LO position.
When installing pull-up and pull-down resistor SIP packs, we recommend using a 2.2 K, eight-resistor SIP
(MCC part number SP-K2.29C). You can substitute individual 2.2 kΩresistors for the resistor SIPs, if required.
4-2
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Chapter 5
Calibrating the PCI-DDA08/12
Self-calibrating
The PCI-DDA08/12 is shipped fully-calibrated from the factory. Calibration coefficients are stored in
nonvolatile RAM. When using the Universal Library, the calibration factors are read from nonvolatile RAM
and are automatically written to the calibration DACs each time you select a different DAC range.
You can recalibrate with respect to the factory-measured voltage standards by selecting the "Calibrate" option
in InstaCal. InstaCal calibrates each channel at all six ranges. Each channel takes less than a minute to
calibrate.
Calibration configuration
The PCI-DDA08/12 provides self-calibration of the analog source and measure systems. This eliminates the
PCI-DDA08/12 calibration circuitry is shown in Figure 5-1.
need for external equipment and user adjustments. The analog output circuits are calibrated for both gain and
offset. Gain calibration of the analog output is performed via DAC reference adjustments. Offset adjustments
for the analog output is made in the output buffer section.
Coarse
Fine
Serial
Trim DACs
Gain Adjust
12-bit Output DAC
AD7837B
Coarse
Fine
Serial
Trim DACs
Vref
Offset Adjust
PGA
Output Voltage
MAX542
16-bit Reference DAC
X
4
Precision
2.5 V
serial
+
Counter
5
COMP
CLEAR
Precision
Comparator
Setpoint Voltage
Vout
8x1
Programable Voltage source
Output
Voltages
Coarse
3 mS Gate
Figure 5-1. Calibration block diagram
5-1
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PCI-DDA08/12 User's Guide Calibrating the PCI-DDA08/12
"In-system" calibration
The PCI-DDA08/12 is calibrated at the factory for the correct voltages at the I/O connector. For more precise
application of voltages at the "system end", we can provide a version of InstaCal that allows you to calibrate the
board within your system for correct voltages at your field connection. This calibration lets you remove the
effects of voltage drops caused by IR loss in the cable and connector for resistances up to 1 Ω. This calibration
also allows you to zero out errors in any external signal conditioning up to approximately ±10 mV.
In most applications, the version of InstaCal that ships with the board provides the accuracy specified. If your
application has unusual requirements, such as long cables, etc., you may need the "in-system version" to
achieve this accuracy.
Contact technical support by phone, fax, or e-mail for details regarding the "in-system" calibration feature. For
international customers, contact your local distributor where you purchased the board.
!Phone: [phone] and follow the instructions for reaching Tech Support.
!Fax: [phone] to the attention of Tech Support
!Email: [e-mail]
5-2
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Chapter 6
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Power consumption
Table 1. Power consumption specifications
+5 V operating 1.6 A typical, 2.6 A max
+12 V 24 mA typical, 48 mA max
-12 V 16 mA typical, 25 mA max
Analog output
Table 2. Analog output specifications
D/A converter type AD7837B
Resolution 12-bits
Number of channels 8
Output ranges ±10 V, ±5 V, ±2.5 V, 0 to 10 V, 0 to 5 V, 0 to 2.5 V.
Each channel independently programmable.
Data transfer Programmed I/O
Offset error (calibrated) ±(300 µV + ¼ LSB)
Gain error (calibrated) ±(300 µV + ¼ LSB)
Differential nonlinearity ±1 LSB max
Integral nonlinearity ±1 LSB max
Monotonicity 12-bits
D/A gain drift ±2 ppm/°C
D/A offset drift ±5 µV/°C
Throughput PC dependent
Settling time (20V step to ±½LSB) 6 µs typ, 10µs max
Slew rate 5 V/µs
Current drive ±5 mA
Output short-circuit duration 25 mA indefinite
Output coupling DC
Output impedance 0.1 Ohms max
Miscellaneous !Double buffered output latches
!Update DACs individually or simultaneously (software selectable)
!Power up and reset, all DAC's cleared to 0 volts, ±210 mV
6-1
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PCI-DDA08/12 User's Guide Specifications
Digital input / output
Table 3. Digital I/O specifications
82C55 mode 0 emulation
Output: 74S244
Digital type (main connector)
Input: 74LS373
Configuration 4 banks of 8, 4 banks of 4, programmable by bank as input or output
Number of channels 48 I/O
Output high 2.4 volts min @ -15 mA
Output low 0.5 volts max @ 64 mA
Input high 2.0 volts min, 7 volts absolute max
Input low 0.8 volts max, -0.5 volts absolute min
Power-up / reset state Input mode (high impedance)
Environmental
Table 4. Environmental specifications
Operating temperature range 0 to 70 °C
Storage temperature range -40 to 100 °C
Humidity 0 to 90% non-condensing
Main connector and pin out
Table 5. Board connectors, cables, accessory equipment
Connector type 100-pin, high density connector
Compatible cables C100FF-x unshielded ribbon cable (x = length in feet)
Compatible accessory products with
the C100FF-x cable
CIO-TERM100
CIO-MINI50 (two required)
6-2
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