8-Channel Voltage Input High Speed USB Data Acquisition Modules
OM-USB-1608G Series
U 16-Bit High-Speed USB Devices
U Acquisition Rates Ranging
From 250 kS/s to 500 kS/s
U 8 Differential (DIFF) or 16
Single-Ended (SE) Analog
Inputs (Software Selectable)
U Up to 2 Analog Outputs
U 8 Digital I/O Lines
U Two 32-Bit Counter
Input Channels
U One Timer Output Channel
®
U TracerDAQ
Software Included
for Acquiring and Displaying
Data and Generating Signals
U Universal Library Includes
Support for Visual Studio
®
and Visual Studio.NET,
Including Examples for Visual
C++®, Visual C#®, Visual Basic®,
and Visual Basic® .NET
U Comprehensive Drivers for
DASYLab
®
and NI LabVIEW™
U InstaCal Software Utility for
Installing, Calibrating, and
Testing
U Supported Operating Systems:
Windows
®
XP SP2 (32-bit only)
and VISTA/7/8 (32-bit and 64-bit)
The OM-USB-1608G Series devices
are low-cost, high-speed, analog and
digital I/O USB devices. All of these
devices offer up to eight differential
(DIFF) or 16 single-ended (SE)
analog inputs, up to eight digital I/O
channels, two counter inputs, and
one timer output.
The OM-USB-1608GX-2AO offers
two, 16-bit analog output channels
with DAC rates up to 500 kS/s.
Everything you need to begin
acquiring, viewing, and storing
data is included with each
OM-USB-1608G Series device,
including comprehensive
software support.
Analog
Model Analog Inputs Sampling Rate Outputs Digital I/O Counters
OM-USB-1608G 16 SE/8 DIFF Up to 250 kS/s 0 8 2
OM-USB-1608GX 16 SE/8 DIFF Up to 500 kS/s 0 8 2
OM-USB-1608GX-2AO 16 SE/8 DIFF Up to 500 kS/s 2 8 2
Analog Input
OM-USB-1608G Series devices
provide 16-bit analog inputs that
are software-selectable as 16 SE or
eight DIFF inputs. These devices also
support input ranges of ±10V, ±5V, ±2V,
and ±1V that are software-selectable
per channel
Analog Output
(OM-USB-1608GX-2AO only)
The OM-USB-1608GX-2AO has two
16-bit analog outputs. Both outputs
can be updated at a rate of 250 kS/s
per channel; one output can be
updated at a rate of 500 kS/s. The
output range is fixed at ±10V. The
outputs default to 0V when the host
PC is shut down or suspended, or
when a reset command is issued to
the device.
Trigger Input
OM-USB-1608G Series devices have
an external digital trigger input. The
trigger mode is software-selectable
for edge or level sensitive mode.
You can configure edge-sensitive
mode for either rising or falling edge.
In level sensitive mode, you can
configure for either high or low level.
The default setting at power up is
edge-sensitive, rising edge.
Retrigger Mode: In retrigger mode,
you can set up repetitive analog
input trigger events. The trigger is
automatically re-armed after it is
activated. Use software to set the A/D
trigger count (the number of samples
you want per trigger).
OM-USB-1608GX,
shown smaller than
actual size with USB
cable (included).
Digital I/O
Eight bidirectional digital I/O
connections are included with
OM-USB-1608G Series devices.
Each digital channel is individually
configurable for input or output. The
digital I/O terminals can detect the
state of any TTL-level input. You can
configure for pull-up (+5V) or pulldown (0V) through a jumper.
Counter Input
Each OM-USB-1608G Series device
includes two 32-bit event counters
for counting TTL pulses. The
counters accept frequency inputs of
up to 20 MHz.
Timer Output
OM-USB-1608G Series devices
have a PWM timer output that
can generate a pulse output with
a programmable frequency in the
range of 0.0149 Hz to 32 MHz.
The timer output parameters are
software-selectable.
External Clock I/O
OM-USB-1608G Series devices
provide one external clock input
and one external clock output
for the analog inputs. The
OM-USB-1608GX-2AO also has
one external clock input and
one external clock output for the
analog outputs.
To Order, Call or Shop Online at omega.com
SM
1
Software
The OM-USB-1608G modules ship
with an impressive array of software,
including the new TracerDAQ®, a fullfeatured, out-of-the-box data logging,
viewing, and analysis application.
Driver support and detailed
example programs are included
for Universal Library programming
libraries for Microsoft® Visual Studio®
programming languages, and other
languages, including DASYLab®, and
ULx for NI LabVIEW® (comprehensive
library of VIs and example programs
compatible with 32-bit and 64-bit
LabVIEW v8.5 through 2012) and
InstaCalTM installation, calibration
and test utility-powerful solutions for
programmers and nonprogrammers
alike. These modules operate under
Microsoft Windows® XP (32-bit only)
and VISTA/7/8 (32-bit and 64-bit)
operating systems.
The OM-USB-1608G data
acquisition modules are supplied
with TracerDAQ software which is a
collection of four virtual instrument
applications used to graphically
display and store input data and
generate output signals:
• Strip Chart—Log and graph values
acquire from analog inputs, digital
inputs, temperature inputs and
counter inputs
• Oscilloscope—Display values
acquired from analog inputs
• Function Generator—Generate
waveforms for analog outputs
• Rate Generator—Generate
waveforms for counter outputs
TracerDAQ PRO is an enhanced
version of TracerDAQ and is
available as a purchased upgrade
(SWD-TRACERDAQ-PRO).
A comparison of some of the
features included in TracerDAQ vs
TracerDAQ PRO is shown below.
Features Comparison
Strip Chart
TracerDAQ Strip Chart.
TracerDAQ Pro Strip Chart
with Measurements.
Feature TracerDAQ TracerDAQ Pro
Channel Types Analog input, temperature input, Analog input, temperature input,
digital input, event counter digital input, event counter
Number of Channels 8 48
Number of Lanes 2 8
Maximum Samples per Channel 32,000 1 million
Alarm Conditions No Yes
Measurements Window No Yes
Enter Annotations
Software Triggering No Yes
Hardware Triggering No Yes
Time-of-Day Triggering No Yes
Linear Scaling No Yes
No Yes
Oscilloscope
Feature TracerDAQ TracerDAQ Pro
Channel Type Analog input Analog input
Number of Channels 2 4
Measurements Window No Yes
Reference Channel No Yes
Math Channel No Yes
Rate Generator
Feature TracerDAQ TracerDAQ Pro
Channel Type Counter output Counter output
Number of Channels 1 20
Function Generator
Feature TracerDAQ TracerDAQ Pro
Channel Type Analog output Analog output
Number of Channels 1 16
Waveform Types Sine Sine, square, triangle, flat, pulse, ramp, random, arbitrary
Duty Cycle No Yes
Phase No Yes
Gate Ratio No Yes
Rate Multiplier No Yes
Sweep (Linear and Exponential) No Yes
2
To Order, Call or Shop Online at omega.com
SM
Specifications
ANALOG INPUT
A/D Converter Type:
Successive approximation
ADC Resolution: 16-bits
Number of Channels: 8 DIFF, 16 SE;
software-selectable
Input Voltage Range: ±10V, ±5V,
±2V, ±1V; software-selectable per
channel
Absolute Maximum Input Voltage
CHx Relative to AGND: ±25V
maximum (power on); ±15V
maximum (power off)
Input Impedance: 1 GΩ (power on);
820 Ω (power off)
Input Bias Current: ±10 nA
Input Bandwidth
All Input Ranges,
Small Signal (-3 dB)
OM-USB-1608G: 750 kHz
OM-USB-1608GX and
OM-USB-1608GX-2AO: 870 kHz
Input Capacitance: 60 pf
Maximum Working Voltage
(Signal + Common Mode):
±10.2 V maximum relative to AGND
Common Mode Rejection Ratio
= 60 Hz, All Input Ranges: 86 dB
f
IN
Crosstalk
Adjacent Differential Mode
Channels, DC to 100 kHz: -75 dB
Input Coupling: DC
Sampling Rate (Software-Selectable)
OM-USB-1608G: 0.0149 Hz
to 250 kHz
OM-USB-1608GX and
OM-USB-1608GX-2AO:
0.0149 Hz to 500 kHz
Analog Input DC Voltage Measurement–All Values are (±)
Gain Error INL Error Gain Temp Offset Temp
(% of Offset Error (% of Absolute Accuracy Coefficient Coefficient
Range Reading) (µv) Range) at Full Scale (µv) (% Reading/°C) (µV/°C)
± 10V 0.024 915 0.0076 4075 0.0014 47
± 5V 0.024 686 0.0076 2266 0.0014 24
± 2V 0.024 336 0.0076 968 0.0014 10
± 1V 0.024 245 0.0076 561 0.0014 5
Trigger Source: TRIG (refer to
External Trigger section)
Sample Clock Source: Internal A/D
clock or external A/D clock (AICKI
terminal)
Burst Mode: Software-selectable
using the internal A/D clock; always
enabled when using the external
clock (AICKI terminal)
OM-USB-1608G: 4 μs
OM-USB-1608GX and
OM-USB-1608GX-2AO: 2 μs
Throughput
Software Paced: 33 to 4000 S/s
typical, system dependent
Hardware Paced
OM-USB-1608G: 250 kS/s maximum
OM-USB-1608GX and
OM-USB-1608GX-2AO:
500 kS/s maximum
Channel Gain Queue: Up to
16 elements; software-selectable
range for each channel
Warm-up Time: 15 minutes minimum
ANALOG OUTPUT
(OM-USB-1608GX-2AO ONLY)
Number of Channels: 2 (leave
unused AOUTx output channels
disconnected)
Resolution: 16-bits
Output Range: ±10V (calibrated)
Output Transient
Host computer is reset, powered on,
suspended, or a reset command is
issued to the device.
Duration: 500 µs
Amplitude: 2V pk-pk
Powered Off
Duration: 10 ms
Amplitude: 7V peak
Differential Non-Linearity:
±0.25 LSB typ; ±1 LSB maximum
Output Current
AOUTx: ±3.5 mA maximum
Output Short-Circuit Protection
AOUTx Connected to
AGND:Unlimited duration
Output Coupling: DC
Power On and Reset State
DACs Cleared to Zero-Scale:
0V, ±50 mV (AOUTx defaults
to 0V whenever the host computer
is reset, powered on,
suspended, or a reset command
is issued to the device)
Output Noise: 30 μVrms
Sample Clock Source: Internal D/A
clock or external D/A clock (AOCKI
terminal)
Output Update Rate: 500 kHz/
number of channels in scan
Settling Time
To Rated Accuracy, 10V
Step: 40 μs
Slew Rate: 9 V/μs
Throughput
Software Paced: 33 S/s to
4000 S/s typical, systemdependent
Hardware Paced: 500 kS/s
maximum, system-dependent
Noise Performance*
Range Counts LSBrms
± 10V 6 0.91
± 5V
± 2V 7 1.06
± 1V
* For the peak‑to‑peak noise distribution test, a differential input
channel is connected to AGND at the input terminal block, and
32,000 samples are acquired at the maximum rate available at
each setting.
6 0.91
9 1.36
Analog Output Absolute Accuracy
Range Absolute Accuracy (±LSB)
± 10V 16.0
Analog Output Relative Accuracy
Range Relative Accuracy (INL)
± 10V 4.0 typical
To Order, Call or Shop Online at omega.com
SM
3
ANALOG INPUT/OUTPUT
CALIBRATION
Recommended Warm-Up Time:
15 minutes minimum
Calibration Method:
Self-calibration (firmware)
Calibration Interval: 1 year
(factory calibration)
AI Calibration Reference
+5V, ±2.5 mV maximum (actual
measured values stored in
EEPROM)
Tempco: 5 ppm/°C maximum
Long Term Stability:
15 ppm/1000 hours
AOUTx Calibration Procedure
(OM-USB-1608GX-2AO)
The analog output terminals are
internally routed to the analog input
circuit. For best calibration results,
disconnect any AOUTx connections
at the terminal block prior to
performing AOUT calibration.
DIGITAL INPUT/OUTPUT
Digital Type: CMOS
Number of I/O: 8
Configuration: Each bit may be
configured as input (power on
default) or output
Pull-Up Configuration: The port
has 47 kΩ resistors configurable as
pull-ups or pull-downs (default) via
internal jumper (W1)
Digital I/O Transfer Rate
(System-Paced): 33 to 8000 port
reads/writes or single bit reads/writes
per second typ, system dependent
Input High Voltage: 2.0V minimum,
5.5V absolute maximum
Input Low Voltage: 0.8V maximum,
-0.5V absolute minimum,
0V recommended minimum
Output High Voltage: 4.4V
minimum (IOH = -50 µA), 3.76V
minimum (IOH = -2.5 mA)
Output Low Voltage: 0.1V
maximum (IOL = 50 µA), 0.44V
maximum (IOL = 2.5 mA)
Output Current: ±2.5 mA maximum
EXTERNAL TRIGGER
Trigger Source: TRIG input
Trigger Mode: Software
configurable for edge or level
sensitive, rising or falling edge,
high or low level. Power on default
is edge sensitive, rising edge.
Trigger Latency:
1 μs + 1 clock cycle maximum
Trigger Pulse Width:
100 ns minimum
Analog Output Calibrated Absolute Accuracy Components
Range % of Offset Offset Gain Tempco
Reading (+mV) Tempco (ppm of Range/°C
± 10V ±0.0183 1.831 12.7 13
Settling Time **
OM-USB-1608G
4 µs Settling 6 µs Settling 10 µs Settling
Range Accuracy Accuracy Accuracy
(% FSR) (% FSR) (% FSR)
± 10 V 0.0061 0.0031 0.0015
± 5 V 0.0061 0.0031 0.0015
± 2 V 0.0061 0.0031 0.0015
± 1 V 0.0061 0.0031 0.0015
OM-USB-1608GX and OM-USB-1608GX-2AO
2 µs Settling 4 µs Settling 9 µs Settling
Range Accuracy Accuracy Accuracy
(% FSR) (% FSR) (% FSR)
± 10 V 0.1251 0.0031 0.0015
± 5 V 0.0687 0.0031 0.0015
± 2 V 0.0687 0.0031 0.0015
± 1 V 0.0687 0.0031 0.0015
** Settling time is defined as the expected accuracy after one conversion when switching from
a channel with a DC input at one extreme of full scale to another channel with a DC input at
the other extreme of full scale. Both input channels are configured for the same input range.
Input Type: Schmitt trigger, 33 Ω
series resistor and 49.9 kΩ
pull-down to ground
Schmitt Trigger Hysteresis:
0.4V to 1.2V
Input High Voltage: 2.2V minimum,
5.5V absolute maximum
Input Low Voltage: 1.5V maximum,
-0.5V absolute minimum, 0V
recommended minimum
EXTERNAL CLOCK INPUT/
OUTPUT
Terminal Names
OM-USB-1608G
and OM-USB-1608GX:
AICKI, AICKO,
(OM-USB-1608GX-2AO):
AOCKI, AOCKO
Terminal Types
AxCKI: Input, active on rising
edge
AxCKO: Output, power on default
is 0V, active on rising edge
Terminal Descriptions
AxCKI: Receives sampling clock
from external source
AxCKO: Outputs the internal
sampling clock (D/A or A/D clock)
or the pulse generated from AxCKI
when in external clock mode.
Input Clock Rate
OM-USB-1608G: 250 kHz maximum
OM-USB-1608GX and
OM-USB-1608GX-2AO:
500 kHz maximum
Clock Pulse Width
AxCKI: 400 ns minimum
AxCKO: 400 ns minimum
Input Type: Schmitt trigger, 33 Ω
series resistor, 47 kΩ pull-down
to ground
Schmitt Trigger Hysteresis:
0.4V to 1.2V
Input High Voltage: 2.2V minimum,
5.5V absolute maximum
Input Low Voltage: 1.5V maximum,
-0.5V absolute minimum, 0V
recommended minimum
Output High Voltage: 4.4V
minimum (IOH = -50 μA),
3.76V minimum (IOH = -2.5 mA)
Output Low Voltage: 0.1V
maximum (IOL = 50 μA),
0.44V maximum (IOL = 2.5 mA)
Output Current: ±2.5 mA maximum
COUNTER
Terminal Names: CTR0, CTR1
Number of Channels: 2 channels
Resolution: 32-bit
Counter Type: Event counter
Input Type: Schmitt trigger, 33 Ω
series resistor, 47 kΩ pull-down
to ground
Input Source:
CTR0 (terminal 52)
CTR1 (terminal 51)
Counter Read/Writes Rates
(Software-Paced): 33 to 8000
reads/writes per second typical,
system dependent
4
To Order, Call or Shop Online at omega.com
SM
Input High Voltage: 2.2V minimum,
5.5V maximum
Input Low Voltage: 1.5V maximum,
-0.5V minimum
Schmitt Trigger Hysteresis:
0.4V minimum, 1.2V maximum
Input Frequency: 20 MHz, maximum
High Pulse Width: 25 ns, minimum
Low Pulse Width: 25 ns, minimum
TIMER OUTPUT
Timer Terminal Name: TMR
Timer Type: PWM output with
count, period, delay, and pulse
width registers
Output Value: Default state is idle
low with pulses high, softwareselectable output invert
Internal Clock Frequency: 64 MHz
Register Widths: 32-bit
High Pulse Width:
15.625 ns minimum
Low Pulse Width:
15.625 ns minimum
Output High Voltage: 4.4V minimum
(IOH = -50 μA), 3.76V minimum (IOH
= -2.5 mA)
Output Low Voltage: 0.1V
maximum (IOL = 50 μA), 0.44V
maximum (IOL = 2.5 mA)
Output Current: ±2.5 mA maximum
MEMORY
Data FIFO: 4 kS analog input/2 kS
analog output
Non-Volatile Memory: 32 KB
(28 KB firmware storage, 4 KB
calibration/user data)
POWER
Supply Current
This is the total quiescent current
requirement for the device that
includes up to 10 mA for the Status
LED. This does not include any
potential loading of the digital I/O
bits, +5V terminal, or the AOUTx
outputs (OM-USB-1608GX-2AO only)
Quiescent Current
OM-USB-1608G
and OM-USB-1608GX: 230 mA
OM-USB-1608GX-2AO: 260 mA
+5V User Output Voltage Range
(Available at Terminal 42):
4.9V minimum to 5.1V maximum
+5V User Output Current
(Available at Terminal 42):
10 mA maximum
ENVIRONMENTAL
Operating Temperature Range:
0 to 55°C (32 to 131°F) maximum
Storage Temperature Range:
-40 to 85°C (-40 to 185°F) maximum
Humidity: 0 to 90% RH
non-condensing max
MECHANICAL
Dimensions:
127 L × 89.9 W × 35.6 H mm
(5.00 × 3.53 × 1.40")
Weight: 160 g (0.35 lb)
USB Cable: 3 m (9.84") maximum
SM
Extended Warranty
Program
OMEGACARESM extended warranty program is
available for models shown on this page. Ask
your sales representative for full details when
placing an order. OMEGACARE
labor and equivalent loaners.
To Order
Model No. Description
OM-USB-1608G 16-channel, 250 kS/s USB data acquisition module with two 32-bit counter inputs,
one timer output and eight DIO lines
OM-USB-1608GX 16-channel, 500 kS/s USB data acquisition module with two 32-bit counter inputs,
one timer output and eight DIO lines
OM-USB-1608GX-2AO 16-channel, 500 kS/s USB data acquisition module with two analog outputs,
two 32-bit counter inputs, one timer output and eight DIO lines
SWD-TRACERDAQ-PRO TracerDAQ Pro software
Comes complete with a 1.8 m (6') USB cable, software and operator’s manual on CD.
Ordering Example: OM-USB-1608G, 16-channel, 250 kS/s USB data acquisition module with two 32-bit counter inputs, one timer output
and eight DIO lines, and OCW-1, 1-year extended warranty adds 1 year to standard 1-year warranty.
Visit omega.com/om-usb-1608g for pricing and details
SM
covers parts,
To Order, Call or Shop Online at omega.com
OM-USB-1608GX,
shown smaller than
actual size.
SM
5
Loading...