Measurement Computing PCI-DAC6702 User manual

PCI-DAC6702 and
PCI-DAC6703
High Resolution Analog Output
and Digital I/O
User's Guide
Document Revision 1, May, 2005
© Copyright 2005, Measurement Computing Corporation

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
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available—at the best possible price.
To offer our customers superior post-sale support—FREE. Whether providing unrivaled telephone technical and
sales support on our latest product offerings, or continuing that same first-rate support on older products and
operating systems, we’re committed to you!
Lifetime warranty: Every hardware product manufactured by Measurement Computing Corporation is warranted against
defects in materials or workmanship for the life of the product. Products found defective are repaired or replaced promptly.
Lifetime Harsh Environment Warranty®: We will replace any product manufactured by Measurement Computing
Corporation that is damaged (even due to misuse) for only 50% of the current list price. I/O boards face some tough
operating conditionssome more severe than the boards are designed to withstand. When a board becomes damaged, just
return the unit with an order for its replacement at only 50% of the current list price. We don’t need to profit from your
misfortune. By the way, we honor this warranty for any manufacturer’s board that we have a replacement for.
30 Day Money Back Guarantee: You may return any Measurement Computing Corporation product within 30 days of
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These warranties are in lieu of all other warranties, expressed or implied, including any implied warranty of
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remedies. Neither Measurement Computing Corporation nor its employees shall be liable for any direct or indirect, special,
incidental or consequential damage arising from the use of its products, even if Measurement Computing Corporation has
been notified in advance of the possibility of such damages.
ii
HM PCI-DAC6702_03.doc

Trademark and Copyright Information
TracerDAQ, Universal Library, Universal Library for LabVIEW, InstaCal, Harsh Environment Warranty, Measurement
Computing Corporation, and the Measurement Computing logo are either trademarks or registered trademarks of
Measurement Computing Corporation.
SoftWIRE is a registered trademark of SoftWIRE Technology, Inc.
Windows, Microsoft, and Visual Studio are either trademarks or registered trademarks of Microsoft Corporation. LabVIEW
is a trademark of National Instruments. All other trademarks are the property of their respective owners.
Information furnished by Measurement Computing Corporation is believed to be accurate and reliable. However, no
responsibility is assumed by Measurement Computing Corporation neither for its use; nor for any infringements of patents
or other rights of third parties, which may result from its use. No license is granted by implication or otherwise under any
patent or copyrights of Measurement Computing Corporation.
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form
by any means, electronic, mechanical, by photocopying, recording, or otherwise without the prior written permission of
Measurement Computing Corporation.
Notice
Measurement Computing Corporation does not authorize any Measurement Computing Corporation product for
use in life support systems and/or devices without the written approval of the CEO of Measurement Computing
Corporation. Life support devices/systems are devices or systems which, a) are intended for surgical
implantation into the body, or b) support or sustain life and whose failure to perform can be reasonably
expected to result in injury. 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

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 ........................................................................................................................vi
Chapter 1
Introducing the PCI-DAC6700 Series Boards................................................................................. 1-1
Overview: PCI-DAC6700 Series board features ............................................................................................ 1-1
Software features ............................................................................................................................................ 1-2
Chapter 2
Installing the PCI-DAC6700 Series .................................................................................................. 2-1
What comes with your PCI-DAC6700 Series shipment? ...............................................................................2-1
Hardware ....................................................................................................................................................................... 2-1
Software......................................................................................................................................................................... 2-1
Documentation............................................................................................................................................................... 2-1
Optional components ..................................................................................................................................................... 2-2
Unpacking the board....................................................................................................................................... 2-2
Installing the software .................................................................................................................................... 2-3
Installing the hardware ................................................................................................................................... 2-3
Connecting the board for I/O operations ........................................................................................................ 2-4
Connectors, cables – main I/O connector....................................................................................................................... 2-4
Pinout – main I/O connector .......................................................................................................................................... 2-5
Cabling........................................................................................................................................................................... 2-7
Field wiring and signal termination accessories............................................................................................................. 2-8
Chapter 3
Programming and Software Applications ...................................................................................... 3-1
Programming languages ................................................................................................................................. 3-1
Packaged applications programs..................................................................................................................... 3-1
Register-level programming ........................................................................................................................... 3-1
Chapter 4
Calibrating the Board........................................................................................................................ 4-1
Calibration theory........................................................................................................................................... 4-1
Chapter 5
Specifications.................................................................................................................................... 5-1
Analog output section..................................................................................................................................... 5-1
Analog output calibration ............................................................................................................................... 5-2
Digital Input / Output ..................................................................................................................................... 5-2
Power consumption ........................................................................................................................................ 5-2
Environmental ................................................................................................................................................ 5-2
Mechanical ..................................................................................................................................................... 5-3
Main connector and pin out ............................................................................................................................ 5-3
iv

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-DAC6700 Series boards so that you
get the most out of the voltage and current analog outputs 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
The term PCI-DAC6700 Series is used throughout this manual when referring to both the PCI-DAC6702
and PCI-DAC6703 boards.
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
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 indicates 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 DAQ Software Quick Start.
Never touch the exposed pins or circuit connections on the board.
v

PCI-DAC6702 and PCI-DAC6703 User's Guide About this User's Guide
Where to find more information
The following electronic documents provide helpful information relevant to the operation of the PCI-
DAC6700 Series boards.
MCC's Specifications: PCI-DAC6702 and PCI-DAC6703 (the PDF version of Chapter 5 in this
guide) is available on our web site at www.mccdaq.com/pdfs/PCI-DAC670x.pdf.
MCC's DAQ Software Quick Start is available on our web site at
www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf.
MCC's Register Map for the PCI-DAC6700 Series is available on our web site at
www.mccdaq.com/registermaps/RegMapPCI-DAC670x.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.
This user's manual is also available on our web site at www.mccdaq.com/PDFmanuals/PCI-DAC6702-
03.pdf.
vi

Chapter 1
Introducing the PCI-DAC6700 Series Boards
Overview: PCI-DAC6700 Series board features
This manual explains how to install and use your PCI-DAC6702 and PCI-DAC6703 board. This manual
refers to these boards collectively as PCI-DAC6700 Series boards.
PCI-DAC6700 Series boards are high-resolution analog output and digital I/O boards designed for PCI
bus-compatible computers. You can use PCI-DAC6700 Series boards for various digital I/O and DC
setpoint applications.
The PCI-DAC6702 provides 8 analog outputs, and the PCI-DAC6703 provides 16 analog outputs. The
voltage output range for each board is ±10.1V volts.
Each board has eight TTL-compatible digital I/O channels that are configured as one eight-bit port. You
can configure each channel individually as either input or output. Digital channels are configured as
inputs by default. Digital bits are pulled up to +5V with 47k resistors. Positions are available for pull-
down resistors.
PCI-DAC6700 Series boards have a 16-bit digital to analog converter (DAC) that may be periodically
updated with new channel data. DAC channel data is stored in nonvolatile RAM (nvRAM). Each channel
has a main circuit that maintains the channel value between DAC updates.
PCI-DAC6700 Series boards are equipped with an onboard temperature sensor that measures the air
temperature flowing over the board.
PCI-DAC6700 Series boards feature plug-and-play installation and on-board digital calibration. All I/O
signals are transmitted through a 100-pin connector.
1-1

PCI-DAC6702 and PCI-DAC6703 User's Guide Introducing the PCI-DAC6700 Series Boards
PCI-DAC6700 Series functions are illustrated in the block diagram shown here.
Bus Interface
Logic
+5V
100-Pin I/O Connector
0.75 A
Resettable
circuit breaker
Data Address Control
LOCAL BUS
Temperature
Sensor
Digital I/O
8-bit Control
Voltage
Output
Circuit
Main
Voltage
Circuit
16-Bit
DAC
DIO (7:0)
RAM
Data
nvRAM
PCI BUS (5V, 32-Bit, 33MHZ)
RAM
Address/
Control
DAC
Out
PCI-DAC6703 x 16
PCI-DAC6702 x 8
Figure 1-1. PCI-DAC6700 Series functional block diagram
Software features
The following software ships with the PCI-DAC6700 Series free of charge.
InstaCal installation, calibration, and test utility
TracerDAQ™ suite of virtual instruments
SoftWIRE® for Visual Studio® .NET graphical programming
MCC DAQ Components for VS .NET (installed with SoftWIRE for VS .NET)
For information on the features of InstaCal, TracerDAQ, and SoftWIRE, refer to the DAQ Software
Quick Start booklet that shipped with the PCI-DAC6700 Series.
1-2

Chapter 2
Installing the PCI-DAC6700 Series
What comes with your PCI-DAC6700 Series shipment?
The following items are shipped with the PCI-DAC6700 Series.
Hardware
The following items should be included with your shipment.
PCI-DAC6702 board or PCI-DAC6703 board
PCI-DAC6702 PCI-DAC6703
Software
The Measurement Computing Data Acquisition Software CD contains the following software:
InstaCal installation, calibration, and test utility
TracerDAQ suite of virtual instruments
SoftWIRE for VS .NET
SoftWIRE MCC DAQ Components for .NET
(installed with SoftWIRE for VS .NET)
Documentation
In addition to this hardware user's guide, you should also receive the DAQ Software Quick Start
(available in PDF at www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf). Please read this
booklet completely before installing any software and hardware.
2-1

PCI-DAC6702 and PCI-DAC6703 User's Guide Installing the PCI-DAC6700 Series
Optional components
If you ordered any of the following products with your PCI-DAC6700 Series board, they should be
included with your shipment.
Universal Library
Universal Library™ Data Acquisition and Control Programming Tools (also includes the InstaCal
utility, the Universal Library User's Guide, and the Universal Library Function Reference)
Cables
C100HD50-x
C100MMS-x
Signal termination and conditioning accessories
MCC provides signal termination products for use with the PCI-DAC6700 Series. Refer to the "Field
wiring and signal termination accessories" section page 2-8 for a complete list of compatible accessory
products.
Unpacking the board
The PCI-DAC6700 Series board is shipped in an antistatic container to prevent damage by an
electrostatic discharge. To avoid such damage, perform the following procedure when unpacking and
handling your board:
1.
2.
3.
Before opening the antistatic container, ground yourself with a wrist-grounding strap or by holding
onto a grounded object (such as the computer chassis).
Touch the antistatic container to the computer chassis before removing the board from the container.
Remove the board from the container. Never touch the exposed pins or circuit connections on the
board.
If your board is damaged, notify Measurement Computing Corporation immediately by phone, fax, or e-
mail. For international customers, contact your local distributor where you purchased the board.
2-2

PCI-DAC6702 and PCI-DAC6703 User's Guide Installing the PCI-DAC6700 Series
If any items are missing or damaged, contact Measurement Computing Corp. 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
Install the software included with your board before you install the hardware. Installing the software first
ensures that the information required for proper board detection is installed and available at boot up.
Refer to the DAQ Software Quick Start for instructions on installing the software on the Measurement
Computing Data Acquisition Software CD. This booklet is shipped with the hardware, and is also
available in PDF at www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf.
Installing the hardware
PCI-DAC6700 Series boards are 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 DAQ Software Quick Start for
instructions on installing the software.
1.
2.
3.
4.
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 installed in the previous
section. Refer to the DAQ Software Quick Start that came with your board for information on how to
initially set up and load InstaCal
If your board has been powered-off for more than 10 minutes, allow your computer to warm up for at
least 15 minutes before acquiring data. This warm-up period is required in order for the board to
achieve its rated accuracy. The high speed components used on the board generate heat, and it takes
this amount of time for a board to reach steady state if it has been powered off for a significant
amount of time.
2-3

PCI-DAC6702 and PCI-DAC6703 User's Guide Installing the PCI-DAC6700 Series
Connecting the board for I/O operations
Connectors, cables – main I/O connector
Table 2-1
Table 2-1. Board connectors, cables, and accessory equipment
lists the board connectors, applicable cables, and compatible accessory products for the PCI-
DAC6700 Series.
Connector type Shielded, SCSI 100-pin D-type
Compatible cables C100HD50-xunshielded round cable. x = 3 or 6 feet. (Figure 2-1)
C100MMS-x shielded round cable. x = 1, 2, or 3 meters. (Figure 2-2)
Compatible accessory products with
the C100HD50-x cable
BNC-16SE
BNC-16DI
CIO-MINI50
CIO-TERM100
SCB-50
Compatible accessory products with
the C100MMS-x cable
SCB-100
BNC-DI-FE
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
http://www.measurementcomputing.com/signals/signals.pdf.
2-4

PCI-DAC6702 and PCI-DAC6703 User's Guide Installing the PCI-DAC6700 Series
Pinout – main I/O connector
The main I/O connector pinouts for each board are shown in the following tables. Note that the DIO[7:0]
signals are provided in two locations in order to provide flexibility for applications which use the
C100HD50-x ribbon cable.
Table 2-2. PCI-DAC6703 connector pin out
Signal name Pin Pin Signal name
AGND 1
•
•
51 AGND
VCH0 2
•
•
52 n/c
AGND0 3
•
•
53 AGND
VCH1 4
•
•
54 n/c
AGND1 5
•
•
55 AGND
VCH2 6
•
•
56 n/c
AGND2 7
•
•
57 AGND
VCH3 8
•
•
58 n/c
AGND3 9
•
•
59 AGND
VCH4 10
•
•
60 n/c
AGND4 11
•
•
61 AGND
VCH5 12
•
•
62 n/c
AGND5 13
•
•
63 AGND
VCH6 14
•
•
64 n/c
AGND6 15
•
•
65 AGND
VCH7 16
•
•
66 n/c
AGND7 17
•
•
67 AGND
AGND 18
•
•
68 AGND
VCH8 19
•
•
69 n/c
AGND8 20
•
•
70 AGND
VCH9 21
•
•
71 n/c
AGND9 22
•
•
72 AGND
VCH10 23
•
•
73 n/c
AGND10 24
•
•
74 AGND
VCH11 25
•
•
75 n/c
AGND11 26
•
•
76 AGND
VCH12 27
•
•
77 n/c
AGND12 28
•
•
78 AGND
VCH13 29
•
•
79 n/c
AGND13 30
•
•
80 AGND
VCH14 31
•
•
81 n/c
AGND14 32
•
•
82 AGND
VCH15 33
•
•
83 n/c
AGND15 34
•
•
84 AGND
n/c 35
•
•
85 DIO0
n/c 36
•
•
86 DIO1
n/c 37
•
•
87 DIO2
n/c 38
•
•
88 DIO3
PC 5V 39
•
•
89 DIO4
DIO0 40
•
•
90 DIO5
DIO1 41
•
•
91 DIO6
DIO2 42
•
•
92 DIO7
DIO3 43
•
•
93 n/c
n/c 44
•
•
94 n/c
DIO4 45
•
•
95 n/c
DIO5 46
•
•
96 GND
DIO6 47
•
•
97 n/c
DIO7 48
•
•
98 n/c
n/c 49
•
•
99 n/c
GND 50
•
•
100 GND
PCI slot ↓
2-5

PCI-DAC6702 and PCI-DAC6703 User's Guide Installing the PCI-DAC6700 Series
Table 2-3. PCI-DAC6702 connector pin out
Signal name Pin Pin Signal name
AGND 1
•
•
51 AGND
VCH0 2
•
•
52 n/c
AGND0 3
•
•
53 AGND
VCH1 4
•
•
54 n/c
AGND1 5
•
•
55 AGND
VCH2 6
•
•
56 n/c
AGND2 7
•
•
57 AGND
VCH3 8
•
•
58 n/c
AGND3 9
•
•
59 AGND
VCH4 10
•
•
60 n/c
AGND4 11
•
•
61 AGND
VCH5 12
•
•
62 n/c
AGND5 13
•
•
63 AGND
VCH6 14
•
•
64 n/c
AGND6 15
•
•
65 AGND
VCH7 16
•
•
66 n/c
AGND7 17
•
•
67 AGND
AGND 18
•
•
68 AGND
n/c 19
•
•
69 n/c
AGND 20
•
•
70 AGND
n/c 21
•
•
71 n/c
AGND 22
•
•
72 AGND
n/c 23
•
•
73 n/c
AGND 24
•
•
74 AGND
n/c 25
•
•
75 n/c
AGND 26
•
•
76 AGND
n/c 27
•
•
77 n/c
AGND 28
•
•
78 AGND
n/c 29
•
•
79 n/c
AGND 30
•
•
80 AGND
n/c 31
•
•
81 n/c
AGND 32
•
•
82 AGND
n/c 33
•
•
83 n/c
AGND 34
•
•
84 AGND
n/c 35
•
•
85 DIO0
n/c 36
•
•
86 DIO1
n/c 37
•
•
87 DIO2
n/c 38
•
•
88 DIO3
PC 5V 39
•
•
89 DIO4
DIO0 40
•
•
90 DIO5
DIO1 41
•
•
91 DIO6
DIO2 42
•
•
92 DIO7
DIO3 43
•
•
93 n/c
n/c 44
•
•
94 n/c
DIO4 45
•
•
95 n/c
DIO5 46
•
•
96 GND
DIO6 47
•
•
97 n/c
DIO7 48
•
•
98 n/c
n/c 49
•
•
99 n/c
GND 50
•
•
100 GND
PCI slot ↓
2-6

PCI-DAC6702 and PCI-DAC6703 User's Guide Installing the PCI-DAC6700 Series
Cabling
1
50
2
49
51
100
52
99
10050
511
Strain relief is
stamped “Pins 1-50”.
Pins 1-50 are on the long side
of the “D” connector.
Pins 51-100 are on
the short side of
the “D” connector.
Key
Key
The red stripe
identifies pin # 1
The red stripe
identifies pin # 51
Strain relief is
Stamped “Pins 51-100”.
Figure 2-1. C100HD50-x cable
Details on the C100HD50-x cable are available on our web site at
www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=104&pf_id=1203.
10050
511
10050
511
Figure 2-2. C100MMS-x cable
Details on the C100MMS-x cable are available on our web site at
www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=104&pf_id=1514.
2-7

PCI-DAC6702 and PCI-DAC6703 User's Guide Installing the PCI-DAC6700 Series
Field wiring and signal termination accessories
You can use the following BNC and screw terminal boards to terminate field signals and route them into
the PCI-DAC6700 Series using the C100HD50-x cable:
BNC-16SE – Brings analog signals to standard BNC connectors. Designed for boards operating in
single-ended mode. Details on this product are available on our web site at
www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=101&pf_id=713.
BNC-16DI – Brings analog signals to standard BNC connectors. Designed for boards operating in
differential mode. Details on this product are available on our web site at
www.mccdaq.com/cbicatalog/cbiproduct.asp?dept_id=101&pf_id=714.
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.
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.
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.
You can use the following screw terminal box and BNC connector box to terminate field signals and
route them into the PCI-DAC6700 Series board using the C100MMS-x cable:
SCB-100 – 100 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=1169.
BNC-16DI-FE – Brings analog signals to standard BNC connectors. Designed to be compatible with
the 100-pin shielded C100MMS-x cable. Details on this product are available on our web site at
www.mccdaq.com/cbicatalog/cbiproduct.asp?dept%5Fid=101&pf%5Fid=1541.
2-8

Chapter 3
Programming and Software 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, Labtech Notebook™, and HP-VEE™, now
have drivers for your board. If the package you own does not have drivers for the 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 PCI-DAC6700 Series register map. This
document is available on our website at www.mccdaq.com/registermaps/RegMapPCI-DAC670x.pdf.
3-1

Chapter 4
Calibrating the Board
You should calibrate the board using the InstaCal utility software after the board has fully warmed up. The
recommended warm-up time is 15 minutes. For best results, calibrate the board immediately before use.
The high resolution analog components on the board are temperature-sensitive, so calibrating the board
before use ensures that your board is operating with the optimum calibration values. All calibration values
are saved in nvRAM.
Calibration theory
InstaCal calibrates the board's analog outputs for offset and gain (see ). A trim DAC is used to
adjust the gain of the DAC. A separate DAC is used to adjust offset on the final output amplifier.
Figure 4-1
Figure 4-1. Analog Output Calibration
Trim DAC
Ref
D/A
Gain
Adjust
Analog Out
Trim DAC
Offset
Adjust
Calibration schedule
You should calibrate your PCI-DAC6700 Series board once per year using InstaCal's calibration
procedures.
4-1

Chapter 5
Specifications
Typical for 25 °C unless otherwise specified.
Analog output section
Table 5-1. Analog output specifications
D/A converter type Enhanced R-2R
Resolution 16-bits, 1 in 65536
Number of channels PCI-DAC6703
PCI-DAC6702
16 voltage
8 voltage
DNL ±1 LSB max
Monotonicity 16-bits, guaranteed after calibration
Update rate, max PCI-DAC6703
PCI-DAC6702
1111 S/s per channel
1111 S/s per channel
Update modes Software selectable per channel for update immediate (default), or update from
NVRAM on command
Output short-circuit
duration
Indefinite @ 25 mA
Power-on state Independent, user-defined power-on states.
Table 5-2. Voltage output specifications
Range ±10.1 V
Output coupling DC
Output impedance 0.1 Ωmax.
Current drive ±10 mA max
Load capacitance 10,000 pF
Slew rate 0.5 V/µs typ.
Settling time (full scale step) 7.2 ms max to ±0.5LSB
Noise 100 µVrms, DC to 1 MHz BW
Offset temperature coefficient ±5 µV/ºC
Gain temperature coefficient ±1 ppm/ºC
Protection Short circuit to ground
Data transfer Programmed I/O
Table 5-3. Absolute accuracy components - all values are (±)
ble 5-3
Range1% of Reading Offset Temp Drift2
(%/ºC)
Absolute Accuracy at FS
±10 V 0.0019 ±710 µV 0.0001 ±1 mV
Note 1:
Note 2:
Temp drift applies only if the ambient temperature changes by more than ±10ºC since the
last calibration.
Each PCI-DAC670x board is tested at the factory to assure that the overall error does not
exceed the values specified in Ta .
5-1