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Measurement Computing USB-1608FS is a versatile data acquisition device designed for various applications. With 16 single-ended or 8 differential analog inputs, it offers high-resolution data capture. The device supports software or hardware-paced acquisition modes, enabling flexible data collection. It also features digital I/O, counter input, trigger input, SYNC I/O, and calibration output for synchronized operations. The USB-1608FS is compact, easy to use, and ideal for applications in industries, research, and education.
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USB-1608FS
Analog Input and Digital I/O
User's Guide
Document Revision 7A
January 2014
© Copyright 2014
Trademark and Copyright Information
Measurement Computing Corporation, InstaCal, Universal Library, and the Measurement Computing logo are either trademarks or registered trademarks of Measurement Computing Corporation. Refer to the Copyrights &
Trademarks section on mccdaq.com/legal for more information about Measurement Computing trademarks.
Other product and company names mentioned herein are trademarks or trade names of their respective companies.
© 2014 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 prior written consent from Measurement Computing
Corporation. Life support devices/systems are devices or systems that, 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.
HM USB-1608FS
Table of Contents
Preface
About this User's Guide ....................................................................................................................... 5
What you will learn from this user's guide ......................................................................................................... 5
Conventions in this user's guide ......................................................................................................................... 5
Where to find more information ......................................................................................................................... 5
Chapter 1
Introducing the USB-1608FS................................................................................................................ 6
Functional block diagram ................................................................................................................................... 6
Chapter 2
Installing the USB-1608FS.................................................................................................................... 7
What comes with your USB-1608FS shipment? ................................................................................................ 7
Hardware .......................................................................................................................................................................... 7
Software ............................................................................................................................................................................ 7
Documentation .................................................................................................................................................................. 7
Unpacking........................................................................................................................................................... 7
Installing the software ........................................................................................................................................ 7
Installing the hardware ....................................................................................................................................... 7
Calibrating the hardware..................................................................................................................................... 8
Chapter 3
Functional Details ................................................................................................................................. 9
Analog input acquisition modes ......................................................................................................................... 9
Software paced .................................................................................................................................................................. 9
Hardware paced ................................................................................................................................................................ 9
BURSTIO ......................................................................................................................................................................... 9
External components ........................................................................................................................................ 10
USB connector .................................................................................................................................................................10
LED .................................................................................................................................................................................10
Screw terminals................................................................................................................................................................10
Signal connections ............................................................................................................................................ 11
Analog input ....................................................................................................................................................................11
Channel-Gain queue ........................................................................................................................................................12
Digital I/O ........................................................................................................................................................................12
Pull-up/down configuration .............................................................................................................................................12
Counter input ...................................................................................................................................................................13
Trigger input ....................................................................................................................................................................13
SYNC I/O ........................................................................................................................................................................13
Calibration output ............................................................................................................................................................13
Ground .............................................................................................................................................................................14
Power output ....................................................................................................................................................................14
Accuracy ........................................................................................................................................................... 14
Synchronized operations ................................................................................................................................... 17
Mechanical drawings ........................................................................................................................................ 18
Chapter 4
Specifications ...................................................................................................................................... 19
Analog input ..................................................................................................................................................... 19
Digital I/O ......................................................................................................................................................... 20
External trigger ................................................................................................................................................. 21
External clock input/output............................................................................................................................... 21
Counter ............................................................................................................................................................. 22
Memory ............................................................................................................................................................ 22
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USB-1608FS User's Guide
Microcontroller ................................................................................................................................................. 22
Power ................................................................................................................................................................ 23
General ............................................................................................................................................................. 23
Environmental .................................................................................................................................................. 23
Mechanical ....................................................................................................................................................... 23
Screw terminal connector and pinout ............................................................................................................... 23
Declaration of Conformity .................................................................................................................. 25
4
Preface
About this User's Guide
What you will learn from this user's guide
This user's guide describes the Measurement Computing USB-1608FS data acquisition device and lists device specifications.
Conventions in this user's guide
For more information
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.
bold text
italic text
Bold text is used for the names of objects on a screen, such as buttons, text boxes, and check boxes.
Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.
Where to find more information
For additional information relevant to the operation of your hardware, refer to the Documents subdirectory where you installed the MCC DAQ software (C:\Program Files\Measurement Computing\DAQ by default), or search for your device on our website at www.mccdaq.com
.
5
Chapter 1
Introducing the USB-1608FS
The USB-1608FS is an analog input and digital I/O data acquisition device providing the following features:
Eight 16-bit single-ended (SE) analog input channels
Each input channel has a dedicated A/D converter for simultaneous sampling.
Software-selectable analog input ranges of ±10 V, ±5 V, ±2 V, and ±1 V
Eight individually configurable digital I/O channels
One 32-bit event counter
One external digital trigger input
Bidirectional external clock for synchronous operations with a second device.
Screw terminals for field wiring connections
The device is powered by the +5V USB supply from the computer, and requires no external power.
The USB-1608FS is a full-speed device that is compatible with both USB 1.1 and USB 2.0 ports. The speed of the device may be limited when using a USB 1.1 port due to the difference in transfer rates on the USB 1.1 versions of the protocol (low-speed and full-speed).
Functional block diagram
USB-1608FS functions are illustrated in the block diagram shown here.
Figure 1. Functional block diagram
6
Chapter 2
Installing the USB-1608FS
What comes with your USB-1608FS shipment?
The following items are shipped with the USB-1608FS.
Hardware
USB-1608FS
USB cable
Software
MCC DAQ CD
Documentation
In addition to this hardware user's guide, you should also receive the Quick Start Guide. This booklet provides an overview of the MCC DAQ software you received with the device, and includes information about installing the software. Please read this booklet completely before installing any software or hardware.
Unpacking
As with any electronic device, take care while handling to avoid damage from static electricity. Before removing the USB-1608FS from its packaging, ground yourself using a wrist strap or touch either the computer chassis or other grounded object to eliminate any stored static charge.
If the device is damaged, notify Measurement Computing Corporation immediately by phone, fax, or email.
Knowledgebase: kb.mccdaq.com
Phone: 508-946-5100 and follow the instructions for reaching Tech Support
Fax: 508-946-9500 to the attention of Tech Support
Email: techsupport@ mccdaq.com
For international customers, contact your local distributor. Refer to the International Distributors section on our web site at www.mccdaq.com/International .
Installing the software
Refer to the Quick Start Guide for instructions on installing the software on the MCC DAQ CD. This booklet is available in PDF at www.mccdaq.com/PDFmanuals/DAQ-Software-Quick-Start.pdf
.
Installing the hardware
Be sure you are using the latest system software
Before installing the device, run Windows Update to update your operating system with the latest HID and USB drivers.
To connect the USB-1608FS to your system, connect the USB cable to a USB port on your computer or to an external USB hub that is connected to your computer.
The USB-1608FS installs as a composite device with separate devices attached. When you connect the device for the first time, a
Found New Hardware
dialog opens as each device interface is detected. This is normal.
After the device is installed its LED will blink and then remain on. This indicates that communication is established between the USB-1608FS and your computer.
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USB-1608FS User's Guide
If the LED turns off
If communication is lost between the device and the computer, the device LED turns off. Disconnect the USB cable from the computer and then reconnect it. This should restore communication, and the LED should turn on.
Calibrating the hardware
You can calibrate the USB-1608FS with InstaCal. Perform calibration whenever the ambient temperature changes by more than ±10 °C from the last calibration.
The Measurement Computing Manufacturing Test department performs the initial factory calibration. Contact
Measurement Computing if you want to have the factory calibration coefficients restored.
8
Chapter 3
Functional Details
Analog input acquisition modes
The USB-1608FS can acquire analog input data in three modes – software paced, hardware paced, and
BURSTIO.
Software paced
The USB-1608FS acquires data one analog sample at a time using software-paced mode. You initiate the A/D conversion by calling a software command. The analog value is converted to digital and returned to the computer. You can repeat this procedure until you have the total number of samples that you want.
The USB-1608FS can attain throughput rates up to 500 S/s using a software loop. This rate is systemdependent.
Hardware paced
The USB-1608FS can acquire data from up to eight channels simultaneously in hardware-paced mode. The analog data is acquired, converted to digital values, and written to an onboard FIFO buffer on the USB-1608FS until you stop the scan. Data is transferred from the USB-1608FS FIFO buffer to the memory buffer on your computer.
The A/D converter is paced by either an internal or external clock source.
The maximum sample rate is an aggregate rate. The total sample rate for all channels is 100 kS/s divided by the number of channels, with a maximum rate of 50 kS/s for any channel. Using this equation, the USB-1608FS can acquire data from one channel at 50 kS/s, two channels at 50 kS/s each, four channels at 25 kS/s each, and so on, up to eight channels at 12.5 kS/s each. You start a hardware-paced scan with a software command.
Optionally, hardware-paced scans can be delayed by an external hardware trigger event.
BURSTIO
When using BURSTIO, the USB-1608FS can acquire data at higher rates using the full capacity of the
32 kilosample FIFO. The acquired data is then read from the FIFO and transferred to a user buffer in the computer after the acquisition is complete. You can initiate a single acquisition sequence of one, two, four, or eight channels with a software command. Optionally, BURSTIO scans can be delayed by an external hardware trigger event.
When BURSTIO is enabled, the number of samples acquired in a scan is limited to the depth of the onboard memory. The maximum sample rate in BURSTIO mode is an aggregate rate is 200 kS/s. The maximum sample rate for all channels is 200 kS/s divided by the number of channels, with a maximum rate of 50 kS/s for any channel.
The maximum sample rate that you can acquire data using BURSTIO is 50 kS/s each for one, two, or four channels, and 25 kS/s each for eight channels.
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USB-1608FS User's Guide
External components
The external components – screw terminal banks, LED, and USB connector –are shown in Figure 2.
1 Screw terminal pins 21 to 40 3 Screw terminal pins 1 to 20
2 LED 4 USB connector
Figure 2. USB-1608FS components
USB connector
The USB connector provides +5 V power and communication. No external power supply is required.
LED
The LED indicates the communication status; it cannot be disabled. LED states are listed in the table below.
LED behavior
LED state
On – steady green
Blinks once
Blinks continuously
Blinks three times
Blinks at a slow rate
Indication
The device is connected to a computer or external USB hub.
A USB command is received.
Data is being transferred.
Initial communication is established between the USB-1608FS and the computer.
The analog input is configured for external trigger. The LED stops blinking and illuminates steady green when the trigger is received.
Screw terminals
The screw terminals provide the following connections:
Eight analog inputs (
CH0 IN
to
CH7 IN
)
Eight digital I/O lines(
DIO0
to
DIO7
)
One external event counter input (
CTR
)
One SYNC I/O terminal for external clocking and multi-unit synchronization (
SYNC
)
One external trigger input (
TRIG_IN
)
One calibration output (
CAL
)
One power output (
PC +5 V
)
analog ground (
AGND
) and digital ground (
GND
) connections
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USB-1608FS User's Guide
Use 16 AWG to 30 AWG wire when making connections to the screw terminals. Pinout locations are shown in
Figure 3. Screw terminal pinout
Signal connections
Analog input
You can connect up to eight analog input connections to
CH0 IN
through
CH7 IN
. Connect unused analog input terminals to ground terminals during operation. For example, if you are not using terminal 15 (
CH7 IN
), connect this terminal to terminal 16 (
AGND
).
The analog input channels are configured for single-ended input mode. Each analog signal is referenced to signal ground (AGND), and requires two wires:
Connect the wire carrying the signal to be measured to
CH# IN
.
Connect the second wire to
AGND
.
The input voltage ranges are ±10 V, ±5 V, ±2.0 V, ±1.0 V.
For more information on analog signal connections
For more information on single-ended inputs, refer to the Guide to Signal Connections (this document is available on our web site at www.mccdaq.com/signals/signals.pdf
).
11
USB-1608FS User's Guide
Channel-Gain queue
The channel-gain queue feature allows you to configure a different gain setting for each analog input channel.
The gain settings are stored in a channel-gain queue list that is written to local memory on the device.
The channel-gain queue list must contain all eight channels listed in consecutive order. An example of the channel-gain queue list is shown in the table below.
Sample channel-gain queue list
Element
0
1
2
3
4
5
6
7
Channel
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
Range
BIP10V
BIP5V
BIP10V
BIP1V
BIP2V
BIP10V
BIP1V
BIP5V
Carefully match the gain to the expected voltage range on the associated channel or an over range condition may occur. Although this condition does not damage the device, it does produce a useless full-scale reading, and can introduce a long recovery time due to saturation of the input channel.
Digital I/O
You can connect up to eight digital I/O lines to
DIO0
through
DIO7
. Each digital channel is individually configurable for input or output. During initial power on or reset the digital pins are set for input.
Figure 4. Schematic showing switch detection by digital channel DIO0
If you set the switch to the +5 V input, DIO0 reads TRUE (1). When set to GND, DIO0 reads FALSE (0).
Pull-up/down configuration
Boards designed with hardware revision E and later have a user-configurable internal jumper to configure the digital bits for pull-up (default) or pull-down. The hardware revision is listed with the part number on the bottom of the device, for example P/N 193334E.
If the p/n of your board is earlier than hardware revision E, the default configuration is pull-up. To configure for pull-down, the board must be modified at the factory.
If your board has a user-configurable jumper, complete the following steps to set the pull-up/down configuration:
1.
Unplug the device from the computer.
2.
Turn the device over and rest the top of the housing on a flat, stable surface.
Caution! The discharge of static electricity can damage some electronic components. Before removing the
USB-1608FS from its housing, ground yourself using a wrist strap or touch the computer chassis or other grounded object to eliminate any stored static charge.
3.
Remove the three screws from the bottom of the device using a #1 Philips head screwdriver.
4.
Hold both the top and bottom sections together, turn the device over and rest it on the surface, then carefully remove the top section of the case to expose the circuit board.
12
USB-1608FS User's Guide
The user-configurable jumper is labeled
DIO
. Figure 5 shows the location of the jumper on the circuit
board.
Figure 5. Pull-up/down jumper location
5.
Configure the jumper for pull-up or pull-down, as shown in Figure 6.
Figure 6. Pull-up/down jumper configuration
6.
Replace the top section of the housing, and fasten it to the bottom section with the three screws.
For more information on digital signal connections
For general information regarding digital signal connections and digital I/O techniques, refer to the Guide to
Signal Connections (available on our web site at www.mccdaq.com/signals/signals.pdf
).
Counter input
The
CTR
terminal is a 32-bit event counter that can accept frequency inputs up to 1 MHz. The internal counter increments when the TTL levels transition from low to high.
Trigger input
The
TRIG_IN
terminal is an external digital trigger input. The trigger mode is set for edge sensitive, and is configurable for rising or falling edge. On power up and reset the trigger mode is set for rising edge.
SYNC I/O
The
SYNC
terminal is a bidirectional I/O signal that can be configured as an input (default) or an output.
Configure as an external clock input to externally source the A/D conversions. The SYNC terminal supports TTL-level input signals of up to 50 kHz.
Configure as an output to pace conversions on a second USB-1608FS device and acquire data from
16 channels. For more information about synchronized operations see page 17.
Calibration output
The
CAL
terminal is an output that is used to calibrate the USB-1608FS. Do not use this pin for any other purpose. Calibration is software-controlled by InstaCal.
13
USB-1608FS User's Guide
Ground
The analog ground (
AGND
) terminals provide a common ground for all analog channels.
The digital ground (
GND
) terminals provide a common ground for the digital, trigger, counter, sync and power terminals.
Power output
The
PC +5V
terminal is a 5 volt output that is supplied by the computer. You can use this terminal to supply power to external devices or circuitry.
Caution! The PC +5V terminal is an output. Do not connect to an external power supply or you may damage the USB-1608FS and possibly the computer.
The maximum total output current that can be drawn from all USB-1608FS connections (power, analog, and digital outputs) is 500 mA. This maximum applies to most personal computers and self-powered USB hubs.
Bus-powered hubs and notebook computers may limit the maximum available output current to 100 mA.
Note
:
If the current requirement of the device exceeds the current available from the computer, connect to a selfpowered hub or power the computer with an external power adapter.
The USB-1608FS can draw up to 150 mA max of current from the USB +5V supply. When running applications with the device, each DIO bit can source up to 2.5 mA. With all outputs at their maximum output current, the total current requirement of the
PC +5V
terminal is calculated as follows:
Total current requirement = (USB-1608FS @ 150 mA) + (8 DIO @ 2.5 mA ea) = 170 mA
The maximum available excess current is the difference between the allowed current draw of the computer platform and the total output current requirement of the device. For an application running on a computer or powered hub, the maximum available excess current is calculated as follows:
Maximum excess current = 500 mA – 170 mA = 330 mA
Measurement Computing highly recommends that you figure in a safety factor of 20% below this maximum current loading for your applications. A conservative, safe user maximum in this case would be in the 250 mA to 300 mA range.
Accuracy
The overall accuracy of any instrument is limited by the error components within the system. Resolution is often used incorrectly to quantify the performance of a measurement product. While "16-bits" or "1 part in
65,536" does indicate what can be resolved, it provides little insight into the quality, or accuracy, of an absolute measurement. Accuracy specifications describe the actual measurement achievable with a USB-1608FS.
There are three types of errors which affect the accuracy of a measurement system:
offset
gain
nonlinearity
The primary error sources in the USB-1608FS are offset and gain. Nonlinearity is small, and is not significant as an error source with respect to offset and gain.
14
USB-1608FS User's Guide
example of what you can expect when performing a measurement in this range.
Figure 7. Ideal ADC transfer function
The USB-1608FS offset error is measured at mid-scale. Ideally, a zero volt input should produce an output code
offset error. The typical offset error specification for the USB-1608FS on the ±10 V range is ±1.66 mV. Offset error affects all codes equally by shifting the entire transfer function up or down along the input voltage axis.
The accuracy plots in Figure 8 are drawn for clarity and are not drawn to scale.
Figure 8. ADC transfer function with offset error
Gain error is a change in the slope of the transfer function from the ideal, and is typically expressed as a
converted to voltage by multiplying the full-scale input (±10 V) by the error.
The accuracy plots in Figure 9 are drawn for clarity and are not drawn to scale.
15
USB-1608FS User's Guide
Figure 9. ADC Transfer function with gain error
For example, the USB-1608FS exhibits a typical calibrated gain error of ±0.04% on all ranges. For the ±10 V range, this would yield 10 V × ±0.0002 = ±4 mV. This means that at full scale, neglecting the effect of offset for the moment, the measurement would be within 4 mV of the actual value. Note that gain error is expressed as a ratio. Values near ±FS (±10 V) are more affected from an absolute voltage standpoint than are values near midscale, which see little or no voltage error.
scale (±10 V). This plot is a graphical version of the typical accuracy specification of the product.
The accuracy plots in Figure 10 are drawn for clarity and are not drawn to scale.
Figure 10. Error band plot
16
USB-1608FS User's Guide
Synchronized operations
You can run up to two USB-1608FS devices on most computers. You can connect the SYNC pin of two devices together in a master/slave configuration and acquire data from the analog inputs of both devices using one clock. When the SYNC pin is configured as an output, the internal A/D pacer clock signal is sent to the screw terminal. You can output the clock to the SYNC pin of a second device that is configured for A/D pacer input.
Change to SYNC pin setting not implemented until first scan
When you change the setting of the SYNC pin to input or to output using InstaCal, the change does not take place until you run a scan with a USB-1608FS.
Consequently, if you change the SYNC pin from output to input, the SYNC pin remains an output, and connections to this pin are connections to an output until the first scan runs. This will not damage the
USB-1608FS.
To update the SYNC pin setting before connecting to the SYNC pin, run the InstaCal analog
Scan Test
.
17
USB-1608FS User's Guide
Mechanical drawings
Figure 11. Circuit board (top) and enclosure dimensions
18
Chapter 4
Specifications
All specifications are subject to change without notice.
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Analog input
Table 1. Analog input specifications
Parameter Condition Specification
A/D converter type
Number of channels
Input ranges
Sampling rate
Throughput
Input configuration
Sampling method
Absolute maximum input voltage CHx IN to GND
Input impedance
Software-selectable
Scan to PC memory
Burst scan to 32 k sample FIFO
Software paced
Hardware paced (Note 1)
Gain queue
Resolution
No missing codes
Crosstalk
CAL output
CAL output accuracy (Note 2)
CAL current
Trigger source
BURSTIO
≤ 32,768 total samples
(uses onboard FIFO)
Signal DC to 25 kHz
User calibration source
Software-selectable
16-bit successive approximation type
8 single-ended
Individual A/D per channel
Simultaneous
±15 V max
100 M
Ω, min
±10 V, ±5 V, ±2 V, ±1 V
0.6 S/s to 50 kS/s, software-selectable
20 S/s to 50 kS/s, software- selectable
500 S/s all channels
(100 kS/s) / (# of channels),
50 kS/s max for any channel
(200 kS/s) / (# of channels),
50 kS/s max for any channel
Software configurable..
Eight unique, consecutive elements – one gain element per channel.
16 bits
15 bits
–80 dB
0.625 V, 1.25 V, 2.5 V, 5.0 V, software-selectable
±0.5% typ, ±1.0% max
±5 mA max
External digital: TRIG_IN
Note 1:
Maximum throughput when scanning in hardware paced mode is machine dependent.
Note 2:
Actual values used for calibration are measured and stored in EEPROM.
Table 2. Calibrated absolute accuracy
Range
±10 V
±5 V
±2 V
±1 V
Accuracy (mV)
5.66
2.98
1.31
0.68
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USB-1608FS User's Guide
Range
±10 V
±5 V
±2 V
±1 V
Table 3. Accuracy components - All values are (±)
% of Reading
0.04
0.04
0.04
0.04
Gain error at FS (mV)
4.00
2.00
0.80
0.40
Offset (mV)
1.66
0.98
0.51
0.28
50 k samples with inputs tied to ground at the user connector. Samples are gathered at the maximum specified sampling rate of 50 kS/s.
Table 4. Noise performance
Range
±10 V
±5 V
±2 V
±1 V
Typical counts
10
10
11
14
LSBrms
1.52
1.52
1.67
2.12
Digital I/O
Table 5. Digital I/O specifications
Parameter Specification
Digital type
Number of I/O
CMOS
8 (DIO0 through DIO7)
Configuration Independently configured for input or output
Pull-up/pull-down configuration All pins pulled up to 5V via 47 k
Ω resistors (default).
Hardware revisions E and later may be changed to pull-down using an internal user-configurable jumper.
Previous revisions can be configured for pull-down at the factory.
Input high voltage threshold 2.0 V min
Input high voltage limit
Input low voltage threshold
Input low voltage limit
5.5 V absolute max
0.8 V max
–0.5 V absolute min
0 V recommended min
3.8 V min Output high voltage
(IOH = –2.5 mA)
Output low voltage
(IOL = 2.5 mA)
Power on and reset state
0.44 V max
Input
20
USB-1608FS User's Guide
External trigger
Parameter
Trigger source
Trigger mode
Trigger latency
Trigger pulse width
Input type
Schmitt trigger hysteresis
Input high voltage threshold
Input high voltage limit
Input low voltage threshold
Input low voltage limit
Table 6. External trigger specifications
Condition
External digital
Software-selectable
Specification
TRIG_IN
Edge sensitive: user configurable for CMOS compatible rising or falling edge.
10 µs max
1µs min
Schmitt trigger, 47 k
Ω pull-down to ground
1.01 V typ
0.6 V min
1.5 V max
2.43 V typ
1.9 V min
3.1V max
5.5 V absolute max
1.42 V typ
1.0 V min
2.0 V max
–0.5 V absolute min
0 V recommended min
External clock input/output
Table 7. External clock I/O specifications
Parameter
Pin name
Pin type
Direction, software-selectable
Input clock rate
Clock pulse width
Input clock mode
Schmitt trigger hysteresis
Input high voltage threshold
Input high voltage limit
Input low voltage threshold
Input low voltage limit
Output high voltage
Output low voltage
Condition
Input
Output
Input
Output
Specification
SYNC
Bidirectional
Receives A/D pacer clock from external source
Outputs internal A/D pacer clock
50 kHz, maximum
1µs min
5µs min
Edge sensitive: rising edge
1.01 V typ
0.6 V min
1.5 V max
2.43 V typ
1.9 V min
3.1V max
5.5 V absolute max
1.42 V typ
1.0 V min
2.0 V max
–0.5 V absolute min
0 V recommended min
4.4 V min (IOH = –50 µA)
3.80 V min (IOH = –8 mA)
0.1 V max (IOL = 50 µA)
0.44 V max (IOL = 8 mA)
21
USB-1608FS User's Guide
Counter
Parameter
Pin name
Counter type
Number of channels
Input type
Input source
Resolution
Schmitt trigger hysteresis
Input high voltage threshold
Input high voltage limit
Input low voltage threshold
Input low voltage limit
Maximum input frequency
High pulse width
Low pulse width
Memory
Table 8. Counter specifications
Specification
CTR
Event counter
1
Schmitt trigger, 47 k
Ω pull-down to ground
CTR screw terminal
32 bits
1.01 V typ
0.6 V min
1.5 V max
2.43 V typ
1.9 V min
3.1V max
5.5 V absolute max
1.42 V typ
1.0 V min
2.0 V max
–0.5 V absolute min
0 V recommended min
1 MHz
500 ns min
500 ns min
Parameter
Data FIFO
EEPROM
EEPROM configuration
Table 9. Memory specifications
Specification
32,768 samples, 65,536 bytes
1,024 bytes
Address range Access
0x000-0x07F
0x080-0x1FF
0x200-0x3FF
Reserved
Read/write
Read/write
Microcontroller
Parameter
Type
Table 10. Microcontroller specifications
Specification
High performance 32-bit RISC microcontroller
Description
128 bytes system data
384 bytes cal data
512 bytes user area
22
USB-1608FS User's Guide
Power
Table 11. Power specifications
Parameter Condition
Supply current
Supply current (Note 3)
USB enumeration
Continuous mode
PC +5 V voltage range (Note 4)
Connected to self-powered hub
Connected to externally-powered root port hub
PC +5V output current (Note 5)
Specification
< 100 mA
150 mA
4.25 V min, 5.25 V max
300 mA max
Note 3:
This is the total current requirement for the USB-1608FS which includes up to 10 mA for the status
LED.
Note 4:
"Self-powered hub" refers to a USB hub with an external power supply. Self-powered hubs allow a connected USB device to draw up to 500 mA. "Root port hubs" reside in the PC USB host Controller.
The USB port(s) on your PC are root port hubs. All externally-powered root port hubs, such as a desktop PC, provide up to 500 mA of current for a USB device. Battery-powered root port hubs provide 100 mA or 500 mA, depending upon the manufacturer. A laptop PC that is not connected to an external power adapter is an example of a battery-powered root port hub. If your laptop PC is constrained to the 100 mA maximum, you need to purchase a self-powered hub.
Note 5:
This refers to the total amount of current that can be sourced from the USB +5 V and digital outputs.
General
Parameter
Device type
Device compatibility
Table 12. General specifications
Specification
USB 2.0 (full-speed)
USB 1.1, USB 2.0
Environmental
Parameter
Operating temperature range
Storage temperature range
Humidity
Mechanical
Table 13. Environmental specifications
Specification
0 °C to 70 °C
–40 °C to 70 °C
0% to 90% non-condensing
Parameter
Dimensions (L × W × H)
USB cable length
User connection length
Table 14. Mechanical specifications
Specification
3.10 × 3.20 × 1.05 in. (79 × 82 × 27 mm)
3 m (9.84 ft) max
3 m (9.84 ft) max
Screw terminal connector and pinout
Table 15. Connector specifications
Parameter
Connector type
Wire gauge range
Specification
Screw terminal
16 AWG to 30 AWG
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USB-1608FS User's Guide
Pin Signal Name
5
6
7
8
1
2
3
4
CH0 IN
AGND
CH1 IN
AGND
CH2 IN
AGND
CH3 IN
AGND
9 CH4 IN
10 AGND
11 CH5 IN
12 AGND
13 CH6 IN
14 AGND
15 CH7 IN
16 AGND
17 CAL
18 AGND
19 AGND
20 AGND
Table 16. Connector pinout
Pin Signal Name
21 DIO0
22 GND
23 DIO1
24 GND
25 DIO2
26 GND
27 DIO3
28 GND
29 DIO4
30 GND
31 DIO5
32 GND
33 DIO6
34 GND
35 DIO7
36 SYNC
37 TRIG_IN
38 CTR
39 PC +5V
40 GND
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Declaration of Conformity
Manufacturer:
Address:
Category:
Measurement Computing Corporation
10 Commerce Way
Suite 1008
Norton, MA 02766
USA
Electrical equipment for measurement, control and laboratory use.
Measurement Computing Corporation declares under sole responsibility that the product
USB-1608FS
to which this declaration relates is in conformity with the relevant provisions of the following standards or other documents:
EC EMC Directive 2004/108/EC: General Requirements, EN 61326-1:2006 (IEC 61326-1:2005).
Emissions:
EN 55011 (2007) / CISPR 11(2003): Radiated emissions: Group 1, Class A
EN 55011 (2007) / CISPR 11(2003): Conducted emissions: Group 1, Class A
Immunity: EN 61326-1:2006, Table 3.
IEC 61000-4-2 (2001): Electrostatic Discharge immunity.
IEC 61000-4-3 (2002): Radiated Electromagnetic Field immunity.
To maintain compliance to the standards of this declaration, the following conditions must be met.
The host computer, peripheral equipment, power sources, and expansion hardware must be CE compliant.
All I/O cables must be shielded, with the shields connected to ground.
I/O cables must be less than 3 meters (9.75 feet) in length.
The host computer must be properly grounded.
Equipment must be operated in a controlled electromagnetic environment as defined by Standards EN
61326-1:2006, or IEC 61326-1:2005.
Declaration of Conformity based on tests conducted by Chomerics Test Services, Woburn, MA 01801, USA in
May, 2004. Test records are outlined in Chomerics Test Report #EMI3876.04. Further testing was conducted by
Chomerics Test Services, Woburn, MA. 01801, USA in December, 2008. Test records are outlined in
Chomerics Test report #EMI5215B.08.
We hereby declare that the equipment specified conforms to the above Directives and Standards.
Carl Haapaoja, Director of Quality Assurance
Measurement Computing Corporation
10 Commerce Way
Suite 1008
Norton, Massachusetts 02766
(508) 946-5100
Fax: (508) 946-9500
E-mail: [email protected]
www.mccdaq.com
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Table of contents
- 5 What you will learn from this user's guide
- 5 Conventions in this user's guide
- 5 Where to find more information
- 6 Functional block diagram
- 7 What comes with your USB-1608FS shipment?
- 7 Hardware
- 7 Software
- 7 Documentation
- 7 Unpacking
- 7 Installing the software
- 7 Installing the hardware
- 8 Calibrating the hardware
- 9 Analog input acquisition modes
- 9 Software paced
- 9 Hardware paced
- 9 BURSTIO
- 10 External components
- 10 USB connector
- 10 LED
- 10 Screw terminals
- 11 Signal connections
- 11 Analog input
- 12 Channel-Gain queue
- 12 Digital I/O
- 12 Pull-up/down configuration
- 13 Counter input
- 13 Trigger input
- 13 SYNC I/O
- 13 Calibration output
- 14 Ground
- 14 Power output
- 14 Accuracy
- 17 Synchronized operations
- 18 Mechanical drawings
- 19 Analog input
- 20 Digital I/O
- 21 External trigger
- 21 External clock input/output
- 22 Counter
- 22 Memory
- 22 Microcontroller
- 23 Power
- 23 General
- 23 Environmental
- 23 Mechanical
- 23 Screw terminal connector and pinout