Measurement USB-2404-UI User Manual

USB-2020

User's Guide

12-bit, Ultra High-Speed USB Device

Document Revision 2
February 2015
© Copyright 2015

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HM USB-2020

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-2020 .................................................................................................................... 6

Functional block diagram ................................................................................................................................... 6

Chapter 2

Installing the USB-2020 ........................................................................................................................ 7

What comes with your USB-2020 shipment? ..................................................................................................... 7

Hardware .......................................................................................................................................................................... 7

Software ............................................................................................................................................................................ 7

Documentation .................................................................................................................................................................. 7

Optional components ........................................................................................................................................................ 7

Unpacking........................................................................................................................................................... 7

Installing the software ........................................................................................................................................ 7

Installing the hardware ....................................................................................................................................... 8

Connecting the external power supply .............................................................................................................................. 8

Calibrating the hardware..................................................................................................................................... 9

Connecting the board for I/O operations ............................................................................................................ 9

Connectors, cables, and accessory products ...................................................................................................................... 9

Cabling ............................................................................................................................................................. 10

Field wiring, signal termination and conditioning ...........................................................................................................10

Chapter 3

Functional Details ............................................................................................................................... 11

Analog input acquisition modes ....................................................................................................................... 11

Software paced .................................................................................................................................................................11

Continuous scan (hardware paced) ..................................................................................................................................11

BURSTIO ........................................................................................................................................................................11

Connectors and LEDs ....................................................................................................................................... 12

BNC connectors ...............................................................................................................................................................12

Status LEDs .....................................................................................................................................................................12

USB connector .................................................................................................................................................................12

External power connector ................................................................................................................................................12

40-pin auxiliary connector (J9) ........................................................................................................................................13

Signal connections ............................................................................................................................................ 14

Analog input ....................................................................................................................................................................14

External clock I/O ............................................................................................................................................................15

Digital I/O ........................................................................................................................................................................15

Trigger input ....................................................................................................................................................................16

Mechanical drawing ......................................................................................................................................... 17

Chapter 4

Specifications ...................................................................................................................................... 18

Analog input ..................................................................................................................................................... 18

Accuracy ..........................................................................................................................................................................19

Noise performance ...........................................................................................................................................................19

Analog input calibration ................................................................................................................................... 19

Digital input/output........................................................................................................................................... 20

External trigger ................................................................................................................................................. 21

3

USB-2020 User's Guide

External clock input/output............................................................................................................................... 21

Memory ............................................................................................................................................................ 21

Power ................................................................................................................................................................ 22

Environmental .................................................................................................................................................. 22

Mechanical ....................................................................................................................................................... 22

USB .................................................................................................................................................................. 22

Signal I/O connectors ....................................................................................................................................... 23

BNC connectors ...............................................................................................................................................................23

Auxiliary connector .........................................................................................................................................................23

4

About this User's Guide

What you will learn from this user's guide

This user's guide describes the Measurement Computing USB-2020 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 Bold text is used for the names of objects on a screen, such as buttons, text boxes, and check boxes.

italic text Italic text is used for the names of manuals and help topic titles, and to emphasize a word or phrase.

Preface

Where to find more inf orm a ti on

Additional information about the USB-2020 is available on our website at www.mccdaq.com. You can also
contact Measurement Computing Corporation by phone, fax, or email with specific questions.

 Knowledgebase:
 Phone: [phone] and follow the instructions for reaching Tech Support
 Fax: [phone] to the attention of Tech Support
 Email:

[e-mail]

kb.mccdaq.com

5

Chapter 1

Introducing the USB-2020

The USB-2020 is a high-speed data acquisition USB board supported under the Windows® operating system.

The USB-2020 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 (low­speed and full-speed).

The USB-2020 device provides the following features:

 two 20 MS/s analog inputs

o simultaneous sampling
o 1 A/D per channel
o 12-bit resolution
o ±10 V, ±5 V, ±2 V, ±1 V voltage ranges (software-selectable)
o 17 MHz input bandwidth

 64 megasample onboard memory

o 40 MS/s overall rate to onboard memory when acquiring from both channels (20 MS/s per channel)
o 8 MS/s throughput to host computer

 Analog and digital triggering (level and edge )
 Analog and digital gating
 Eight digital I/O lines
 Internal or external pacing of analog scans
 Eight digital I/O lines
 BNC connectors and 40-pin auxiliary connector for signal connections

Functional block diagram

USB-2020 functions are illustrated in the block diagram shown here.

Figure 1. Functional block diagr am

6

Chapter 2

Installing the USB-2020

What comes with your USB-2020 shipment?

Hardware

 USB-2020
 USB cable (2-meter length)
 External power supply and cord: 9 VDC, 3 A power adapter. MCC part number CB-PWR-9
 Four nylon standoffs

Software

MCC DAQ Software CD

Documentation

MCC DAQ Quick Start Guide

The Quick Start Guide 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.

Optional components

 Cables

o Standard BNC cable
o C40FF-x
o C40-37F-x

 Screw termination boards

o CIO-MINI40
o CIO-MINI37
o SCB-37

Unpacking

As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the USB-2020 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 your USB-2020 arrives already damaged, notify Measurement Computing Corporation immediately by
phone, fax, or email.

 Knowledgebase:
 Phone
 Fax: [phone] to the attention of Tech Support
 Email:

For
website at

: 508-946-5100 and follow the instructions for reaching Tech Support

[e-mail]

international customers, contact your local distributor. Refer to the International Distributors section on our

www.mccdaq.com/International.

kb.mccdaq.com

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.

7

USB-2020 User's Guide Installing the USB-2020

Installing the hardware

Before you connect the USB-2020 to your computer, connect the external power supply that was shipped with
the device.

Disconnect USB, then power supply

When disconnecting the USB-2020, disconnect the USB cable first, and then disconnect the power supply.

Connecting the external power supply

Refer to Figure 8 on page 12 for the location of the connectors and LEDs mentioned in the following procedure.

Power to the USB-2020 is provided with the 9 VDC external power supply (CB-PWR-9). Connect the external

power supply before connecting the USB cable to the USB-2020 and your computer.

Complete the following steps to connect the power supply to the USB-2020:

1. Connect the external power cord to the USB-2020-power connector.

2. Plug the power supply into a power outlet.

The top (
is established. If the voltage supply is less than 7.3 V and/or a USB connection is not established, the

Ready LED is off.

Device Ready) LED is on (blue) when 9 VDC power is supplied the USB-2020 and a USB connection

Device

To connect the USB-2020 to your system, complete the following steps:

3. Connect the USB cable that was shipped with the device to the USB connector on the USB-2020.

The USB cable supplied with the USB-2020 has a higher gauge wire (24 AWG minimum VBUS/GND,
28 AWG minimum D+/D–) than generic USB cables, and is required for proper enumeration of the
USB-2020.

4. Connect the other end of the USB cable to a USB port on your computer or to an external USB hub that is
connected to your computer. The bottom (

USB Activity) LED turns on. The USB cable only provides

communication to the USB-2020.

If you are running Windows XP and connect the device to a USB 1.1 port, a balloon displays the message

USB device can perform faster if you connect to a USB 2.0 port. You can ignore this message. The

Your

USB-2020 functions properly when connected to a USB 1.1 port, although USB bandwidth is limited.

If the Device Ready LED turns off

If communication is lost between the device and the computer, the Device Ready LED turns off. Disconnect
the USB cable from the computer and then reconnect it. This should restore communication, and the Device

Ready LED should turn on.

If your system does not detect the USB-2020

USB device not recognized message appears when you connect the USB-2020, complete the following

If a
steps:

1. Unplug the USB cable from the USB-2020.

2. Unplug the external power cord from the power connector.

3. Plug the external power cord back into the power connector.

4. Plug the USB cable back into the USB-2020.

Your system should now properly detect the USB-2020 hardware. Contact technical support if your system still
does not detect the USB-2020.

8

USB-2020 User's Guide Installing the USB-2020

Connector types

Four standard BNC female connectors for analog input,

Compatible cable for the BNC connectors

Standard BNC cable

Compatible cables

C40FF-x: 40-conductor ribbon cable, female both ends, x = length

C40-37F-x: 40-pin IDC to 37-pin female D connector, x = length in
feet.

(using the C40FF-x cable)

Compatible accessory products
(using the C40-37F-x cable)

CIO-MINI37
SCB-37

Removing USB-2020 boards from Windows XP systems

Device Manager may require up to 30 seconds to detect the removal of a USB-2020 board from a Windows XP
system with Service Pack 2 installed. This time increases with each additional connected device. If you remove
four devices from your system, the time required for Device Manager to update may be almost two minutes.

If you re-attach the USB-2020 to your system before Device Manager updates, the bottom LED does not turn
on. Your system does not detect new hardware until Device Manager first detects that hardware has been
removed. The InstaCal software is unresponsive during this re-detection time. Wait until Device Manager
updates with the new hardware before running InstaCal. The USB-2020 is detected by the system when the top
(Device Ready) LED is on.

Calibrating the hardware

The Measurement Computing Manufacturing Test department performs the initial factory calibration. The
calibration coefficients are stored in non-volatile RAM.

You can use InstaCal to recalibrate the USB-2020. No external equipment or user adjustments are required.

At run time, the calibration factors are loaded into system memory and are automatically retrieved each time a
different ADC range is specified. A full calibration typically takes less than two minutes.

Before you calibrate the device, turn your computer on and allow at least 30 minutes for the surrounding
temperature to stabilize. For best results, calibrate the device immediately before making critical measurements.
The high resolution analog components on the board are sensitive to temperature. Pre-measurement calibration
insures that your device is operating with optimum calibration values.

Connecting the board for I/ O operations

Connectors, cables, and accessory products

The following table lists the board connectors, applicable cables, and compatible accessory products for the
USB-2020.

Board connectors, cables, and compatible hardware

Parameter Specification



clock I/O, and digital trigger input

 40-pin IDC connector

in feet.

Compatible accessory products

CIO-MINI40

9

USB-2020 User's Guide Installing the USB-2020

The red stripe

identifies pin # 1

40-pin Female

IDC Connector

1

2

39

40

40-pin Female

IDC Connector

1

2

39

40

20

1

37

19

The red stripe

identifies pin # 1

37-pin Female

Dsub Connector

40-pin Female

IDC Connector

1

2

39

40

Cabling

For signal connections and termination, you can use the CIO-MINI40 screw terminal board and C40FF-x cable.

Figure 2. C40FF-x cable

For connections to 37-pin connectors or boards, you can use the C40-37F-x or C40F-37M-x cable.

Figure 3. C40-37F-x cable

Field wiring, signal termination and conditioning

You can use the 40-pin CIO-MINI40 universal screw terminal board to terminate field signals and route them

into the USB-2020 using the C40FF-x cable:

You can use the following MCC screw terminal boards to terminate field signals and route them into the

USB-2020 using the C40-37F-x cable directly:

 CIO-MINI37 – 37-pin universal screw terminal board.
 SCB-37 – 37-conductor, shielded signal connection/screw terminal box.

10

Chapter 3

Functional Det ails

Analog input acquisition m ode s

The USB-2020 can acquire analog input data in three different modes – software paced, continuous scan
(hardware paced), and BURSTIO.

Software paced

In software paced mode, you can acquire one analog sample at a time. You initiate the A/D conversion by
calling a software command. The analog value is converted to digital and returned to the computer. You repeat
this procedure until you have the total number of samples that you want from one channel.

The typical throughput sample rate in software paced mode is 4 kS/s (system-dependent).

Continuous scan (hardware paced)

Continuous scan mode enables data to be directly transferred to the host computer during acquisition. The
maximum rate in continuous scan mode is 8 MS/s for all acquired data (one channel or two channels). The
maximum rate achieved depends on the host computer..

BURSTIO

When using BURSTIO, the USB-2020 can acquire data at the maximum rate of 20 MS/s per channel to the
internal memory buffer (up to 64 megasamples)
user buffer in the computer. You can initiate a single acquisition sequence of one to two channels with either a
software command or an external hardware trigger event.

When BURSTIO is enabled, scans are limited to the depth of the onboard memory, as the data is acquired at a
rate faster than it can be transferred to the computer. Time must be allowed between scans for the acquisition

and the transfer of the data.

1

. The acquired data is read from the FIFO and transferred to a

1

In some situations, the available memory is restricted below 64 megasamples. Refer to Buffer

size limitations on Windows systems on page 15 for more information.

11

USB-2020 User's Guide Functional Details

1

USB connector

4

Clock I/O BNC connector (CLK IO)

7

Analog input channel 0 BNC

connector (CH0)

2

External power connector

5

External digital trigger input BNC connector

(TRIG IN)

8

USB Activity LED

3

40-pin IDC connector

6

Analog input channel 1 BNC connector

CH1

9

Device Ready LED

Connectors and LEDs

Figure 4. Location of connectors and LEDs

(

)

BNC connectors

The USB-2020 has four BNC connectors that provide connections for the following signals:

 Two single-ended analog inputs
 One external digital trigger input
 One clock input/output

The external digital trigger input signal is also available on the 40-pin IDC connector.

Status LEDs

The Device Ready LED turns on after the device is enumerated by the system and is associated with a
hardware driver.

USB Activity LED turns on when the USB-2020 is transmitting or receiving data.

The

USB connector

The USB connector provides power to the USB-2020 and communication with the host computer.

External power connecto r

The USB-2020 requires external power. Connect the CB-PWR-9 power supply to the external power connector.
This power supply provides 9 VDC, 3 A power, and plugs into a standard 120 VAC outlet.

12

USB-2020 User's Guide Functional Details

Pin Description

Signal Name

Pin

Pin

Signal Name

Pin Description

Ground

GND 1 • • 2

+VO

Power output

Ground

GND 3 • • 4

N/C

Do not connect

Digital I/O bit 7

DIO7

5 • • 6 N/C

Do not connect

Digital I/O bit 6

DIO6

7 • • 8 N/C

Do not connect

Digital I/O bit 5

DIO5

9 • •

10

TRIG IN

External digital trigger input

Digital I/O bit 4

DIO4

11 • •

12

GND

Ground

Digital I/O bit 3

DIO3

13 • •

14

GND

Ground

Digital I/O bit 2

DIO2

15 • •

16

GND

Ground

Digital I/O bit 0

DIO0

19 • •

20

GND

Ground

Ground

GND

21 • •

22

N/C

Do not connect

Do not connect

N/C

23 • •

24

N/C

Do not connect

Ground

GND

25 • •

26

N/C

Do not connect

Do not connect

N/C

27 • •

28

N/C

Do not connect

Ground

GND

29 • •

30

N/C

Do not connect

Do not connect

N/C

31 • •

32

N/C

Do not connect

Ground

GND

33 • •

34

N/C

Do not connect

Power output

+VO

35 • •

36

N/C

Do not connect

Do not connect

N/C

39 • •

40

N/C

Do not connect

40-pin auxiliary connector (J9)

The 40-pin auxiliary connector provides the following connections for all I/O signals except for analog input
and clock I/O:

 Eight digital I/O (
 Digital trigger input (
 12 ground connections (
 Two +5V power outputs (

DIO0 to DIO7)

TRIG IN)

GND)

+VO)

The signals that are available on the 40-pin IDC connector are listed below. Connect signals on the 40-pin IDC

connector using a C40FF-x cable or C40-37F-x cable.

40-pin IDC connector pin out

Digital I/O bit 1 DIO1 17 • • 18 GND Ground

Ground GND 37 • • 38 N/C Do not connect

13

USB-2020 User's Guide Functional Details

Pin

Signal Name

Pin

Signal Name

1

GND 1 GND

2

+VO

20

+VO 3 GND 2 GND 4 N/C

21

N/C 5 DIO7

3

DIO7

6

N/C

22

N/C 7 DIO6

4

DIO6

8

N/C

23

N/C 9 DIO5

5

DIO5

10

TRIG IN

24

TRIG IN

11

DIO4

6

DIO4

12

GND

25

GND

13

DIO3

7

DIO3

14

GND

26

GND

15

DIO2

8

DIO2

16

GND

27

GND

17

DIO1

9

DIO1

18

GND

28

GND

19

DIO0

10

DIO0

20

GND

29

GND

21

GND

11

GND

22

N/C

30

N/C

23

N/C

12

N/C

24

N/C

31

N/C

25

GND

13

GND

26

N/C

32

N/C

27

N/C

14

N/C

28

N/C

33

N/C

29

GND

15

GND

30

N/C

34

N/C

31

N/C

16

N/C

32

N/C

35

N/C

33

GND

17

GND

34

N/C

36

N/C

35

+VO

18

+VO

36

N/C

37

N/C

37

GND

19

GND

38

N/C

39

N/C

40

N/C

40-pin to 37-pin signal mapping

Signal mapping on the C40-37F-x cable is not a one-to-one ratio. The following table lists the pin numbers of

the signals on the 40-pin end and the pin numbers of the associated signals on the 37-pin end.

Signal mapping on the C40-37F-x cable

40-pin cable end 37-pin cable end

Signal connections

Analog input

The USB-2020 has two single-ended simultaneous sampling analog inputs that provide sampling at rates of up
to 20 MS/s to internal memory when using BURSTIO and at rates of up to 8 MS/s (system-dependent) to the
host computer in continuous scan mode. The input ranges are software-selectable for ±10 V, ±5 V, ±2 V, ±1 V.

When using BURSTIO, the internal memory can store up to 64 megasamples at the maximum rate for transfer
to the computer after the acquisition is complete. Data is transferred to the host computer at a maximum rate of
8 MS/s (system-dependent).

14

USB-2020 User's Guide Functional Details

Buffer size limitations on Windows systems

When creating very large buffers in Windows, you may receive the message The requested amount of

Windows page-locked memory is not available when you try to start a scan. This error occurs when there is

enough memory to create the buffer, but the memory cannot be locked down. For example, the driver can only
lock a maximum buffer size of 67,107,800 bytes (33,553,900 samples) on Windows XP systems. A workaround
for this is available when BURSTIO is enabled, allowing you to transfer the entire 64 MS of data from the

onboard memory to the Windows buffer. For more information, refer to the USB-2020 topic (Hardware
Considerations section) in the Universal Librar y Help (User's Guide section).

You can pace analog input operations with the internal A/D clock or with an external clock source. When using
an external input scan clock, connect the clock source to the

CLK IO BNC connector.

External clock I/O

USB-2020 analog input scanning operations can be paced with the internal A/D clock or with an external clock
source.

The CLK IO connector can be configured through software for input (default) for external pacing, or for output
to pace a connected device.

Digital I/O

You can connect up to eight digital I/O lines to DIO0 through DIO7 on the 40-pin IDC connector. When a bit is
configured for input, it can detect the state of any TTL-level input.

Digital input voltage ranges of up to 0 to 15 V are permitted, with thresholds of 0.8 V (low) and 2.0 V (high).

Each DIO channel is an open-drain, which can sink up to 150 mA for direct drive applications when used as an

output.

Figure 6 shows an example of a typical digital output connection.

Figure 5. Digital output connection

External pull-up capability

Inputs are pulled high by default to 5 V through 47 kΩ resistors on the circuit board. The pull-up voltage is
common to all 47 kΩ resistors.

You can configure the pull-up/pull-down state by changing the placement of the shorting block located at the
three-pin header J10. Pull-up is the default factory configuration

15

USB-2020 User's Guide Functional Details

Pull

(factory default)

-up default configuration

Pull-down configuration

Figure 6. Pull-up and pull-down jumper configurations (J10)

An external pull-up resistor can be used to pull the DIO bit up to a voltage that exceeds the internal 5 V pull-up
voltage (15 V maximum). Be aware that this would place the 47k internal pull up resistor in a parallel
resistance configuration that could offset the logic high voltage level.

Figure 7. Digital I/O external resistor configuration

Trigger input

Both the TRIG IN BNC connector and the TRIG IN IDC pin are external digital trigger/gate inputs that you can
configure through software.

An analog scan can have a trigger or a gate, but not both. For example, you cannot use an analog trigger and use

TRIG IN BNC connector to gate at the same time.

the

A trigger or gate can be digital or analog.

 Digital triggers can be configured for rising or falling edge, or for high or low level.
 Analog triggers can be configured for software-selectable high or low level, or for rising or falling edge

with software-selectable hysteresis.

 Digital gates can be configured for high or low level.
 Analog gates can be configured for software-selectable high or low level, or for in or out of software-

selectable window.

16

USB-2020 User's Guide Functional Details

Each configuration is explained below:

 High or low level − Trigger or gate an acquisition when an input signal is higher or lower than the specified

voltage.

 Rising or falling edge − Trigger an acquisition when input signals cross a specified voltage (rising or

falling)

 Window − Gate an acquisition when the input signal is within or outside two specified voltages (in/out of

window)

 Hysteresis − After the input signal has passed through one specified voltage, trigger an acquisition when

the input signal passes through a second voltage (positive or negative). For example, once the signal goes
below 5 V, a rising edge that crosses 4 V must occur to trigger an acquisition.

Mechanical drawing

Figure 8. USB-2020 board dimensions

17

A/D converter type

AD9225

Number of channels

2 Resolution

12-bits

Sampling method

Simultaneous

Input ranges

±10 V, ±5 V, ±2 V, ±1 V, software-selectable

Connection type

BNC

Input coupling

DC

Absolute maximum input
voltage

±15 V max (power on)
Input impedance

1.5 MΩ typ

Input leakage current

2 uA typ, 10 uA max

Input bandwidth (3 db)

All input ranges

17 MHz typ

Trigger source

Digital

TRIG IN (BNC connector and 40-pin connector)
See External trigger for more information

Analog

CH0 or CH1

Sample clock source

Internal

1 kHz to 20 MHz max

External

CLK IO (BNC connector)
See External clock input/output for more information

Throughput

Software paced

33 S/s to 4 kS/s typ; system-dependent

BURSTIO

1 kS/s to 20 MS/s to 64 MS onboard memory

Data transfer rate

From onboard memory

10 MS/s typ

Signal-to-noise ratio(SNR)

66.6 dB

Signal-to-noise and distortion
ratio (SINAD)

66.5 dB

Spurious free dynamic range
(SFDR)

80 dB

Total harmonic distortion
(THD)

80 dB

Specifications

All specifications are subject to change without notice.
Typical at 25 °C unless otherwise specified
Specifications in italic text are guaranteed by design.

Analog input

Table 1. Analog input specifications

Parameter Condition Specification

Input configuration Single-ended, individual A/D per channel

Chapter 4

Crosstalk DC to 10 kHz –90 dB

Continuous scan 1 kS/s to 8 MS/s, system-dependent

18

USB-2020 User's Guide Specifications

±10 V

0.11

5.2

0.0976

35.72

0.0035

30

±5 V

0.11

5.2

0.0488

20.46

0.0035

110

±2 V

0.11

1.1

0.0244

8.18

0.0035

10

±1 V

0.11

1.1

0.0122

4.64

0.0035

25

±10 V

5

0.76

±5 V

5

0.76

±2 V

7

1.06

±1 V

7

1.06

Recommended warm-up time

15 minutes min.

Calibration method

Self calibration, with calibration factors for each range stored onboard in non-volatile
memory

Calibration interval

1 year (factory calibration)

Accuracy

Table 2. DC Accuracy components and specifications. All values are (±)

Range Gain error

(% of reading)

Offset error
(mV)

INL error
(% of range)

Absolute
accuracy at
Full Scale
(mV)

Gain
temperature
coefficient
(% reading/°C)

Offset
temperature
coefficient
(µV/°C)

Noise performance

For the peak-to-peak noise distribution test, a single-ended input channel is connected to AGND at the input
BNC connector and 20,000 data samples are acquired at the maximum rate.

Table 3. Noise performance specifications

Range Counts LSBrms

Analog input calibration

Table 4. Analog input calibration specifications

Parameter Specification

19

USB-2020 User's Guide Specifications

Digital type

CMOS

Number of I/O

8

Configuration

Each bit can be independently configured as input (power on default) or

stated.

Input voltage range

0 V to 15 V

Input characteristics

47 kΩ pull-up/pull-down resistor, 28 kΩ series resistor

Abs. Maximum input voltage

+20 V max

Pull-up/pull-down configuration

The port has 47 kΩ resistors that can be configured as pull-up or pull-down

pins 2 and 3.

Digital I/O transfer rate (software paced)

33 S/s to 4,000 S/s typ; system-dependent

Input high voltage

2.0 V min

Input low voltage

0.8 V max

Output characteristics

47 kΩ pull-up, open drain (DMOS transistor, source connected to ground)

Output voltage range

0 V to 5 V (using 47 KΩ internal pull up resistors)

(Note 1)

Drain to source breakdown voltage

42.5 V min (Note 2)

Sink current capability

150 mA max (continuous) per output pin
150 mA max (continuous), total for all eight channels

DMOS transistor on-resistance (drain to
source)

4 Ω

Digital input/output

Table 5. Digital I/O specifications

Parameter Specification

output
Input bits can be read at any time whether the digital output is active or tri-

with an internal jumper. The factory configuration is pull-up (J10 shorting
block default position is pins 1 and 2)

Pull down capability is available by placing the J10 shorting block across

0 V to 15 V max through optional, user-supplied external pull-up resistors

Off state leakage current 1.0 µA




Note 1: Adding external pull-up resistors connects the output bit in parallel with the internal 47 kΩ pull-up

resistor. The resulting load voltage depends on the value of the external resistor value and the pull-up
voltage used. In general, external 10 KΩ pull-up resistors are sufficient for most applications.

Note 2: Does not include the additional leakage current contribution that can occur when using an external

pull-up resistor.

20

USB-2020 User's Guide Specifications

Trigger source

Digital

TRIG IN (BNC connector and 40-pin connector)

Analog

CH0 or CH1

Trigger mode

Digital

Rising or falling edge, high or low level

Analog

Trigger above or below software-selectable level, rising or
falling edge with software-selectable hysteresis

A/D gate source

Digital

TRIG IN (BNC connector and 40-pin connector)

Analog

CH0 or CH1

A/D gate modes

Digital

High or low level

Analog

Software-selectable high or low level, in or out of software­selectable window

Trigger latency

50 ns max

Trigger pulse width

25 ns min

Input type

49.9 Ω series resistor

Input high voltage

2.0 V min

Input low voltage

0.8 V max

Terminal name

CLK IO (BNC connector)

Terminal type

ADC clock input/output, software-selectable for input or output (default is input)

When configured for output, outputs the internal sampling clock

Clock rate

1 kHz to 20 MHz max

Stability

±50 ppm

Input impedance

1 MΩ

Input threshold

High: 2.0 V min
Low: 0.8 V max

Maximum rate

20 MHz

Input range

0 V to 5.5 V

Clock pulse width

25 ns min

Input type

49.9 Ω series resistor

Input high voltage

2.0 V min

Input low voltage

0.8 V max

Output low voltage

0.4 V max

Output current

24 mA max

Data FIFO

64 MS using BURSTIO, 4 kS not using BURSTIO

Non-volatile memory

32 KB (30 KB firmware storage, 2 KB calibration/user data)

External trigger

Table 6. External trigger specifications

Parameter Condition Specification

External clock input/output

Table 7. External clo ck I/ O spe ci fications

Parameter Specification

Terminal description  When configured for input, receives sampling clock from external source



Output high voltage 2.4 V min

Memory

Table 8. Memory specifications

Parameter Specification

21

USB-2020 User's Guide Specifications

Supply voltage

9 VDC to 18 VDC ( MCC plug-in power supply CB-PWR-9 recommended)

Supply current

0.75 A max (Note 3)

Power jack configuration

Two conductor, barrel

Power jack barrel diameter

6.3 mm

Power jack pin diameter

2.0 mm

+VO voltage range

4.50 V to 5.25 V

+VO current sourcing

10 mA max.

Operating temperature range

0 °C to 50 °C max

Storage temperature range

–40 °C to 85 °C max

Humidity

0% to 90% non-condensing max

Dimensions (L × W × H)

142.24 × 180.34× 38.09 mm (5.6 × 7.1 × 1.5 in.)

Weight

1.5 lb

USB device type

USB 2.0 (high-speed)

Device compatibility

USB 2.0

min 28 AWG D+/D–)

USB cable length

3 m (9.84 ft) max

Power

Table 9. Power specifications

Parameter Specification

Power jack polarity Center positive

Note 3: This is the total quiescent current requirement for the device that includes up to 10 mA for the Status

LED. This value does not include potential loading of the DIO bits or the +VO pin.

Environmental

Table 10. Environmental speci ficat ion s

Parameter Specification

Mechanical

Table 11. Mechanical specific ation s

Parameter Specification

USB

Table 12. USB specifications

Parameter Specification

USB cable type

A-B cable, UL type AWM 2527 or equivalent. (min 24 AWG VBUS/GND,

22

USB-2020 User's Guide Specifications

USB

B type

Auxiliary connector (J9)

40-pin header connector

Compatible cables for the 40-pin

C40FF-x

Compatible accessory products with

CIO-MINI40

Compatible accessory products with

CIO-MINI37
SCB-37

CH0

Analog input channel 0

CH1

Analog input channel 1

TRIG IN

BNC connection for external digital trigger (Note 4)

BNC connection for the ADC clock input/output, software-selectable for input or
output (default is input)

Pin

Signal name

Pin description

Pin

Signal name

Pin description

1

GND

Ground

2

+VO

Power output

3

GND

Ground

4

N/C

Do not connect

5

DIO7

Digital I/O bit 7

6

N/C

Do not connect

7

DIO6

Digital I/O bit 6

8

N/C

Do not connect

9

DIO5

Digital I/O bit 5

10

TRIG IN

External digital trigger input

11

DIO4

Digital I/O bit 4

12

GND

Ground

15

DIO2

Digital I/O bit 2

16

GND

Ground

17

DIO1

Digital I/O bit 1

18

GND

Ground

19

DIO0

Digital I/O bit 0

20

GND

Ground

21

GND

Ground

22

N/C

Do not connect

23

N/C

Do not connect

24

N/C

Do not connect

25

GND

Ground

26

N/C

Do not connect

29

GND

Ground

30

N/C

Do not connect

33

GND

Ground

34

N/C

Do not connect

35

+VO

Power output

36

N/C

Do not connect

37

GND

Ground

38

N/C

Do not connect

39

N/C

Do not connect

40

N/C

Do not connect

Signal I/O connectors

Table 13. Connector specifications

Connector Specification



auxiliary connector

the C40FF-x cable

the C40-37F-x cable

BNC connectors

BNC signal name Signal description

 C40-37F-x




Table 14. BNC connector pinout

CLK IO

Note 4: Also available on the auxiliary connector J9.

Auxiliary connector

Table 15. 40-pin connector J9 pinout

13 DIO3 Digital I/O bit 3 14 GND Ground

27 N/C Do not connect 28 N/C Do not connect

31 N/C Do not connect 32 N/C Do not connect

Note 5: N/C = no connection, not used

23

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