Measurement Computing USB-3100 Series User manual

USB-3105
USB-based Analog Output
User Guide
Document Revision 3A, March, 2009
©Copyright 2009, Measurement Computing Corporation

Trademark and Copyright Information
Measurement Computing Corporation, InstaCal, Universal Library, and the Measurement Computing logo are
either trademarks or registered trademarks of MeasurementComputing Corporation. Refer to the Copyrights &
Trademarks section on mccdaq.com/legal for more information about Measurement Computing trademarks.
Other product and company namesmentioned herein are trademarks or trade names of their respective
companies.
©2009 MeasurementComputingCorporation. All rights reserved. No part of this publicationmay 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.
3
HM USB-3105

Table of Contents
Preface
About this User's Guide........................................................................................................................6
What you will learn from this user's guide..........................................................................................................6
Conventions in this user's guide........................................................................................................................................ 6
Where to find more information .........................................................................................................................6
Chapter 1
Introducing theUSB-3105 ....................................................................................................................7
Overview: USB-3105 features............................................................................................................................7
USB-3105 block diagram...................................................................................................................................8
Software features ................................................................................................................................................8
Chapter 2
InstallingtheUSB-3105 ......................................................................................................................9
What comes with your USB-3105 shipment?...................................................................................................9
Hardware......................................................................................................................................................................... 9
Additional documentation............................................................................................................................................... 9
Unpacking the USB-3105.................................................................................................................................9
Installing thesoftware.......................................................................................................................................10
Installing the hardware......................................................................................................................................10
Connecting the USB-3105 to your system...................................................................................................................... 10
Calibrating theUSB-3105 ................................................................................................................................11
Chapter 3
Functional Details ...............................................................................................................................12
External components.........................................................................................................................................12
USB connector................................................................................................................................................................ 12
Status LED...................................................................................................................................................................... 12
Power LED ..................................................................................................................................................................... 13
Screw terminal banks...................................................................................................................................................... 13
Analog voltage output terminals (VOUT0 to VOUT15) ................................................................................................ 14
Digital I/O terminals (DIO0 to DIO7) ............................................................................................................................ 14
Digital I/O control terminal (DIO CTL) for pull-up/down configuration....................................................................... 15
Ground terminals (AGND, DGND)................................................................................................................................ 15
Synchronous DAC load terminal (SYNCLD)................................................................................................................. 15
Counter terminal (CTR).................................................................................................................................................. 15
Power terminal (+5V)..................................................................................................................................................... 16
Synchronizing multiple units ............................................................................................................................16
Chapter 4
Specifications......................................................................................................................................17
Analog voltage output.......................................................................................................................................17
Analog output calibration .................................................................................................................................18
Digital input/output...........................................................................................................................................18
Synchronous DAC Load...................................................................................................................................19
Counter .............................................................................................................................................................19
Memory ............................................................................................................................................................20
Microcontroller.................................................................................................................................................20
Power................................................................................................................................................................20
USB specifications............................................................................................................................................20
Environmental...................................................................................................................................................20
4

USB-3105 User's Guide
Mechanical........................................................................................................................................................21
Main connector and pin out ..............................................................................................................................21
Declaration of Conformity..................................................................................................................22
5

6
Preface
About this User’s Guide
What you will learn from this user's guide
This user's guide describes the Measurement Computing USB-3105 data acquisition board and
lists hardware specifications.
Conventions in this user's guide
For more information
Text presented in a box signifies additional information related to the subject matter.
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.
Where to find more information
Additional information about USB-3105 hardware is available on our website at
www.mccdaq.com.You can also contact Measurement Computing Corporation with specific questions.
Knowledgebase: kb.mccdaq.com
Tech support form: www.mccdaq.com/support/support_form.aspx
Email: [e-mail]
Phone: [phone] and follow the instructions for reaching Tech Support
For international customers, contact your local distributor. Refer to the International Distributors section on our
website at www.mccdaq.com/International.

Chapter 1
Introducing the USB-3105
Overview: USB-3105 features
This user's guide contains all of the information you need to connect the USB-3105 to your computer and to the
signals you want to control. The USB-3105 is part of the Measurement Computing brand of USB-based data
acquisition products.
The USB-3105 is a USB 2.0 full-speed device that is supported under popular Microsoft®Windows®operating
systems. The USB-3105 is fully compatible with both USB 1.1 and USB 2.0 ports.
The USB-3105 provides 16 channels of analog voltage output, eight digital I/O connections, and one 32-bit
event counter.
The USB-3105 has four quad (4-channel) 16-bit digital-to-analog converters (DAC). You set the voltage output
range of each DAC channel independently with software for either bipolar or unipolar. The bipolar range is
±10 V, and the unipolar range is 0 to 10 V. The analog outputs may be updated individually or simultaneously.
A bidirectional synchronization connection allows you to simultaneously update the DAC outputs on multiple
devices.
The USB-3105 features eight bidirectional digital I/O connections. You can configure the DIO lines as input or
output in one 8-bit port. All digital pins are floating by default. A screw terminal connection is provided for
pull-up (+5 V) or pull-down (0 volts) configuration.
The 32-bit counter can count TTL pulses.
The USB-3105 is powered by the +5 volt USB supply from your computer. No external power is required. All
I/O connections are made to the screw terminals located along each side of the USB-3105.
Figure 1. USB-3105
7

USB-3105 User's Guide Introducing the USB-3105
USB-3105 block diagram
USB-3105 functions are illustrated in the block diagram shown here.
Screw terminal I/O connector
SPI
USB
Microcontroller
Screw terminal I/O connector
8
SYNCLD
Event Counter
1 channel
(32-bit) 1
D/A
D/A
D/A
D/A
DIO
8channels
16
4
4
4
4
1
Analog Voltage
Output
16 channels (16-bit)
4-channel
Quad
16
USB
Full-speed
USB 2.0
Compliant
Interface
Figure 2. USB-3105 block diagram
Software features
For information on the features ofInstaCal and the other software included with your USB-3105,refer tothe
Quick Start Guide that shipped with your device. The Quick Start Guide is also available in PDF at
www.mccdaq.com/PDFs/manuals/DAQ-Software-Quick-Start.pdf.
Check www.mccdaq.com/download.htm for the latest software version.
8

Chapter 2
Installing the USB-3105
What comes with your USB-3105 shipment?
The following items are shipped with the USB-3105.
Hardware
USB-3105 device
USB cable (2 meter length)
Additional documentation
In addition to this hardware user's guide, you should also receive the Quick Start Guide (available in PDF at
www.mccdaq.com/PDFs/manuals/DAQ-Software-Quick-Start.pdf). This booklet supplies a brief
description of the software you received with your USB-3105 and information regarding installation ofthat
software. Please read this booklet completely before installing any software orhardware.
Unpacking the USB-3105
As with any electronic device, you should take care while handling to avoid damage from static
electricity. Before removing the USB-3105 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.
9

USB-3105 User's Guide Installing the USB-3105
If any components are missing or damaged, notify Measurement Computing Corporation immediately by phone,
fax, or e-mail:
Phone: [phone] and follow the instructions for reaching Tech Support.
Fax: [phone] to the attention of Tech Support
Email: techs[email protected]
Installing the software
Refer to the Quick Start Guide for instructions on installing the software on the Measurement Computing
Data Acquisition Software CD. This booklet is available in PDF at www.mccdaq.com/PDFs/manuals/DAQ-
Software-Quick-Start.pdf.
Installing the hardware
Be sure you are using the latest system software
Before you connect the USB-3105, make sure that you are using the latest versions of the USB drivers.
Before installing the USB-3105, download and install the latest Microsoft Windows updates. In particular, when
using Windows XP, make sure you have XP Hotfix KB822603 installed. This update is intended to address a
serious error in Usbport.sys when you operate a USB device. You can run Windows Update or download the
update from www.microsoft.com/downloads/details.aspx?familyid=733dd867-56a0-4956-b7fe-
e85b688b7f86&displaylang=en. For more information, refer to the Microsoft Knowledge Base article
"Availability of the Windows XP SP1 USB 1.1and 2.0update." This article is available at
support.microsoft.com/?kbid=822603.
Connecting the USB-3105 to your system
To connect the USB-3105 to your system, turn your computer on, and 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 cable provides power
and communication to the USB-3105.
When you connect the USB-3105 for the first time, a Found New Hardware popup balloon (Windows XP) or
dialog (other Windows versions) appears as the USB-3105 is detected by your computer.
After the USB-3105 is installed, the popup balloon or dialog states "Your new hardware is installed and ready to
use," and the power LED should flash and then remain lit. This indicates that communication is established
between the USB-3105 and your computer.
Caution! Do not disconnect any device from the USB bus while the computer is communicating with the
USB-3105, or you may lose data and/or your ability to communicate with the USB-3105.
10

USB-3105 User's Guide Installing the USB-3105
If the power LED turns off
If the power LED is illuminated but then turns off, the computer has lost communication with the USB-3105. To
restore communication, disconnect the USB cable from the computer, and then reconnect it. This should restore
communication, and the power LED should turn back on.
Calibrating the USB-3105
The USB-3105 is shipped fully calibrated. Calibration coefficients are stored in the device FLASH memory.
Return the device to Measurement Computing Corporation when calibration is required. The normal calibration
interval is once per year.
11

Chapter 3
Functional Details
External components
The USB-3105 has the following external components, as shown in Figure 3.
USB connector
Status LED
Power LED
Screw terminal banks (2)
Screw terminal
pins 1 to 28
Screw terminal
pins 29 to 56
USB
connector
Power LED
Status LED
Figure 3. USB-3105 external components
USB connector
The USB connector provides power and communication to the USB-3105. The voltage supplied through the
USB connector is system-dependent, and may be less than 5 V. No external power supply is required.
Status LED
The Status LED indicates the communication status of the USB-3105. It flashes when data is being transferred,
and is off when the USB-3105 is not communicating. This LED uses up to 10 mA of current and cannot be
disabled.
Power LED
The power LED lights up when the USB-3105 is connected to a USB port on your computer or to an external
USB hub that is connected to your computer.
12

USB-3105 User's Guide Functional Details
Screw terminal banks
The USB-3105 has two rows of screw terminals—one row on the top edge of the housing, and one row on the
bottom edge. Each row has 28 connections. Use 16 AWG to 30 AWG wire gauge when making screw terminal
connections. Pin numbers are identified in Figure 4.
Pin 56Pin 29
Pin 28Pin 1
Figure 4. USB-3105 screw terminal pin numbering
Screw terminal – pins 1-28
The screw terminals on the bottom edge of the USB-3105 (pins 1 to 28) provide the following connections:
Eight analog voltage output connections (VOUT0, VOUT2, VOUT4, VOUT6, VOUT8, VOUT10, VOUT12,
VOUT14)
Four analog ground connections (AGND)
Eight digital I/O connections (DIO0 to DIO7)
Screw terminal – pins 29-56
The screw terminals on the top edge of the USB-3105 (pins 29 to 56) provide the following connections:
Eight analog voltage output connections (VOUT1, VOUT3, VOUT5, VOUT7, VOUT9, VOUT11, VOUT13,
VOUT15)
Four analog ground connections (AGND)
One SYNC terminal for external clocking and multi-unit synchronization (SYNCLD)
Three digital ground connections (DGND)
One external event counter connection (CTR)
One digital I/O pull-down resistor connection (DIO CTL)
One voltage output power connection (+5V)
13

USB-3105 User's Guide Functional Details
29 VOUT1 30 NC 31 VOUT3 32 NC 33 AGND 34 VOUT5 35 NC 36 VOUT7 37 NC 38 AGND 39 VOUT9 40 NC 41 VOUT11 42 NC 43 AGND 44 VOUT13 45 NC 46 VOUT15 47 NC 50 DGND 51 NC 52 CTR 53 DGND 54 DIO CTL 55 DGND 56 +5V 48 AGND 49 SYNCLD
VOUT0 1 NC 2 VOUT2 3 NC 4 AGND 5 VOUT4 6 NC 7 VOUT6 8 NC 9 AGND 10 VOUT8 11 NC 12 VOUT10 13 NC 14 AGND 15 VOUT12 16 NC 17 VOUT14 18 NC 19 AGND 20 DIO0 21 DIO1 22 DIO2 23 DIO3 24 DIO4 25 DIO5 26 DIO6 27 DIO7 28
Figure 5. USB-3105 signal pin out
Analog voltage output terminals (VOUT0 to VOUT15)
The screw terminal pins labeled VOUT0 to VOUT15 are voltage output terminals (see Figure 5). The voltage
output range for each channel is software-programmable for either bipolar or unipolar. The bipolar range is
±10 V, and the unipolar range is 0 to 10 V. The channel outputs may be updated individually or simultaneously.
Digital I/O terminals (DIO0 to DIO7)
You can connect up to eight digital I/O lines to the screw terminals labeled DIO0 to DIO7 (pins 21 through 28).
You can configure each digital bit for either input or output.
When you configure the digital bits for input, you can use the digital I/O terminals to detect the state of any TTL
level input. Refer to the switch shown in Figure 6 and the schematic shown in Figure 7. When the switch is set to
the +5 V USER input, DIO7 reads TRUE (1). If you move the switch to DGND, DIO7 reads FALSE (0).
Pin 53
DGND
Pin 56
+5V
Pin 28
DIO7
Figure 6. DIO7 detecting the state of a switch
+5V
DGND
DIO7
Figure 7. Schematic showing DIO7 detecting the state of
a switch
14

USB-3105 User's Guide Functional Details
For more information ondigital signal connections
For more information ondigital signal connections and digital I/O techniques, refer to theGuide to
Signal Connections (available on our web site at www.mccdaq.com/pdfs/DAQ-Signal-Connections.pdf).
Digital I/O control terminal (DIO CTL) for pull-up/down configuration
All digital pins are floating by default. When inputs are floating, the state of unwired inputs are undefined (they
may read high or low). You can configure the inputs to read a high or low value when they aren’t wired. Use the
DIO CTL connection (pin 54) to configure the digital pins for pull-up (inputs read high when unwired) or pull-
down (inputs read low when unwired).
To pull up the digital pins to +5V, wire the DIO CTL terminal pin to the +5V terminal pin (pin 56).
To pull down the digital pins to ground (0 volts), wire the DIO CTL terminal pin to a DGND terminal pin
(pin 50, 53, or 55).
Ground terminals (AGND, DGND)
Eight analog ground (AGND) connections provide a common ground for all analog voltage output channels.
Three digital ground (DGND) connections provide a common ground for the DIO, CTR, SYNCLD and +5V
connections.
Synchronous DAC load terminal (SYNCLD)
The synchronous DAC load connection (pin 49) is a bidirectional I/O signal that allows you to simultaneously
update the DAC outputs on multiple devices. You can use this pin for two purposes:
Configure as an input (slave mode) to receive the D/A LOAD signal from an external source.
When the SYNCLD pin receives the trigger signal, the analog outputs are updated simultaneously.
SYNCLD pin must be logic low in slave mode for immediate update of DAC outputs
When the SYNCLD pin is in slave mode, the analog outputs can be updated immediately or when a positive
edge is seen on the SYNCLD pin (this is under software control.)
The SYNCLD pin must be at a low logic level for DAC outputs to update immediately. If the external source
supplying the D/A LOAD signal is pulling the SYNCLD pin high, no update will occur.
Refer to the "USB-3100 Series" section in the Universal Library User's Guide for information on how to update
DAC outputs immediately.
Configure as an output (master mode) to send the internal D/A LOAD signal to the SYNCLD pin.
You can use the SYNCLD pin to synchronize with a second USB-3105 and simultaneously update the DAC
outputs on each device. Refer to Synchronizing multiple units on page 17.
Use InstaCal to configure the SYNCLD mode as master or slave. On power up and reset the SYNCLD pin is set
to slave mode (input).
Refer to the "USB-3100 Series" section in the Universal Library User's Guide for information on how to
configure the USB-3105 with the Universal Library.
Counter terminal (CTR)
The CTR connection (pin 52) is the input to the 32-bit event counter. The internal counter increments when the
TTL levels transition from low to high. The counter can count frequencies of up to 1 MHz.
15

USB-3105 User's Guide Functional Details
Power terminal (+5V)
The +5 V connection (pin 56) draws power from the USB connector. This terminal is a +5V output.
Caution! The +5V terminal is an output. Do not connect to an external power supply or you may damage the
USB-3105 and possibly the computer.
Synchronizing multiple units
You can connect the SYNCLD terminal pin (pin 49) of two USB-3105 units together in a master/slave
configuration and simultaneously update the DAC outputs of both devices. Do the following.
1. Connect the SYNCLD pin of the master USB-3105 to the SYNCLD pin of the slave USB-3105.
2. Configure the SYNCLD pin on the slave device for input to receive the D/A LOAD signal from the master
device. Use InstaCal to set the direction of the SYNCLD pin.
3. Configure the SYNCLD pin on the master device for output to generate an output pulse on the SYNCLD
pin.
Set the Universal Library SIMULTANEOUS option for each device. Refer to the Universal Library User's Guide
for information on how to configure the USB-3105 with the Universal Library.
When the SYNCLD pin on the slave device receives the signal, the analog output channels on each device are
updated simultaneously.
An example of a master/slave configuration is shown here.
S
Slave
PMD-1608F
Master
device Slave
device
SYNCLD pin
(terminal pin 49)
D/A LOAD signal
Configure the SYNCLD
pin for output Configure the SYNCLD pin for input
Figure 8. Synchronizing the update of multiple devices
16

Chapter 4
Specifications
Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.
Analog voltage output
Table 1. Analog voltage output specifications
Parameter Conditions Specifications
Digital to Analog converter
DAC8554
Number of channels
16
Resolution
16 bits
Output ranges
Calibrated
±10 V, 0 to 10 V
Software configurable
Un-calibrated
±10.2 V, -0.04 to 10.08 V
Software configurable
Output transient ±10 V to (0 to 10 V) or
(0 to 10 V) to ±10 V range
selection.
(Note 1)
Duration: 5 µS typ.
Amplitude: 5V p-p typ.
Host PC is reset, powered on,
suspended or a reset command is
issued to device.
(Note 2)
Duration: 2 S typ.
Amplitude: 2V p-p typ.
Initial power on. Duration: 50 mS typ.
Amplitude: 5V peak typ.
Differential non-linearity
(Note 3)
Calibrated
±1.25 LSB typ.
-2 LSB to +1 LSB max.
Un-calibrated ±0.25 LSB typ.
±1 LSB max.
Output current
VOUTx pins
±3.5 mA typ.
Output short-circuit protection
VOUTx connected to AGND
Indefinite
Output coupling
DC
Power on and reset state
DACs cleared to zero-scale: 0 V, ±50 mV typ.
Output range: 0-10V
Output noise
0 to 10 V range
14.95 µVrms typ.
±10 V range
31.67 µVrms typ.
Settling time
to 1 LSB accuracy
25 µS typ.
Slew rate
0 to 10 V range
1.20 V/µS typ.
±10 V range
1.20 V/µS typ.
Throughput
Single-channel
100 Hz max., system dependent
Multi-channel
100 Hz/#ch max., system dependent
Note 1: The USB-3105 output voltage level defaults to 0V whenever the output voltage range is
reconfigured.
The USB-3105 output voltage level will also default to 0V:
1) Whenever the host PC is reset, shut down or suspended.
2) If a reset command is issued to the device
17

USB-3105 User's Guide Specifications
Note 2: The duration of this particular output transient is highly dependent on the enumeration process of
the host PC. Typically the output of the USB-3105 is stable after 2 seconds.
Note 3: The maximum differential non-linearity specification applies to the entire 0 to 70 °C temperature
range of the USB-3105. This specification also accounts for the maximum errors due to the
software calibration algorithm (in Calibrated mode only) and the DAC8554 digital to analog
converter non-linearities.
Table 2. Absolute accuracy specifications – calibrated output
Range Accuracy (±LSB)
±10 V
14.0
0 to 10 V
22.0
Table 3. Absolute accuracy components specifications – calibrated output
Range % of reading Offset (±mV) Temp drift (%/°C) Absolute accuracy at FS (±mV)
±10 V
±0.0183
1.831
0.00055
3.661
0 to 10 V
±0.0183
0.915
0.00055
2.746
Table 4. Relative accuracy specifications
Range Relative accuracy (±LSB)
±10 V , 0 to 10 V
4.0 typ.
12.0 max.
Analog output calibration
Table 5. Analog output calibration specifications
Parameter Conditions Specifications
Recommended warm-up time 15 minutes min.
On-board precision reference DC level: 5.000 V ±1 mV max.
Tempco: ±10 ppm/°C max.
Long term stability: ±10 ppm/SQRT(1000 hrs)
Calibration method
Software calibration
Calibration interval
1 year
Digital input/output
Table 6. Digital I/O specifications
Digital logic type CMOS
Number of I/O 8
Configuration
Independently configured for input or output
Pull-up/pull-down configuration
(Note 4)
User configurable
All pins floating (default)
Digital I/O input loading
TTL (default)
47K ohms (pull-up/pull down configurations)
Digital I/O transfer rate (system paced)
System dependent, 33 to 1000 port reads/writes or single bit reads/writes per
second.
Input high voltage
2.0 V min, 5.5 V absolute max
Input low voltage
0.8 V max, –0.5 V absolute min
Output high voltage (IOH = –2.5 mA)
3.8 V min
Output low voltage (IOL = 2.5 mA)
0.7 V max
Power on and reset state
Input
18

USB-3105 User's Guide Specifications
Note 4: Pull up and pull down configuration area available using the DIO CTL terminal block pin 54. The
pull down configuration requires the DIO CTL pin (pin 54) to be connected to a DGND pin (pin
50, 53 or 55). For a pull up configuration, the DIO CTL pin should be connected to the +5V
terminal pin (pin 56).
Synchronous DAC Load
Table 7. SYNCLD I/O specifications
Parameter Conditions Specification
Pin name
SYNCLD (terminal block pin 49)
Power on and reset state
Input
Pin type
Bidirectional
Termination
Internal 100K ohms pull-down
Software selectable direction
Output
Outputs internal D/A LOAD signal.
Input
Receives D/A LOAD signal from external source.
Input clock rate
100 Hz max
Clock pulse width
Input
1 µs min
Output
5 µs min
Input leakage current
±1.0 µA typ.
Input high voltage
4.0 V min, 5.5 V absolute max
Input low voltage
1.0 V max, –0.5 V absolute min
Output high voltage (Note 5)
IOH = –2.5 mA
3.3 V min
No load
3.8 V min
Output low voltage (Note 6)
IOL = 2.5 mA
1.1 V max
No load
0.6 V max
Note 5: SYNCLD is a Schmitt trigger input and is over-current protected with a 200 Ohm series resistor.
Note 6: When SYNCLD is in input mode, the analog outputs may either be updated immediately or when
a positive edge is seen on the SYNCLD pin (this is under software control.) However, the pin
must be at a low logic level in order for the DAC outputs to be updated immediately. If an
external source is pulling the pin high, no update will occur.
Counter
Table 8. CTR I/O specifications
Parameter Conditions Specification
Pin name
CTR
Number of channels
1
Resolution
32-bits
Counter type
Event counter
Input type
TTL, rising edge triggered
Counter read/writes rates
(software paced)
Counter read
System dependent, 33 to 1000 reads per second.
Counter write
System dependent, 33 to 1000 reads per second.
Schmidt trigger hysteresis
20 mV to 100 mV
Input leakage current
±1.0 µA typ.
Input frequency
1 MHz max.
High pulse width
500 nS min.
Low pulse width
500 ns min.
Input high voltage 4.0 V min, 5.5 V absolute max
Input low voltage 1.0 V max, –0.5 V absolute min
19

USB-3105 User's Guide Specifications
Memory
Table 9. Memory specifications
EEPROM
256 bytes
EEPROM configuration
Address range Access Description
0x000-0x0FF
Read/write
256 bytes user data
Microcontroller
Table 10. Microcontroller specifications
Type
High performance 8-bit RISC microcontroller
Program memory
16,384 words
Data memory
2,048 bytes
Power
Table 11. Power specifications
Parameter Conditions Specification
Supply current
USB enumeration
< 100 mA
Supply current (Note 7)
Quiescent current
200 mA typ.
+5V user output voltage range (Note 8)
Available at terminal block pin 56
4.5 V min, 5.25 V max.
+5V user output current (Note 9)
Available at terminal block pin 56
10 mA max.
Note 7: This is the total quiescent current requirement for the USB-3105 which includes up to 10 mA for
the status LED. This does not include any potential loading of the digital I/O bits, +5V user
terminal, or the VOUTx outputs.
Note 8: Output voltage range assumes USB power supply is within specified limits.
Note 9: This refers to the total amount of current that can be sourced from the +5V user terminal (pin 56)
for general use. This specification also includes any additional contribution due to DIO loading.
USB specifications
Table 12. USB specifications
USB device type USB 2.0 (full-speed)
USB device compatibility
USB 1.1, 2.0
USB cable length
3 meters max.
USB cable type
A-B cable, UL type AWM 2527 or equivalent (min 24 AWG VBUS/GND,
min 28 AWG D+/D-).
Environmental
Table 13. Environmental specifications
Operating temperature range
0 to 70 °C
Storage temperature range
-40 to 85 °C
Humidity
0 to 90% non-condensing
20