DT9818

Isolated, Embedded USB
Data Acquisition Board
Overview
The DT9818 is perfect for embedding
in a custom application where isolationis required. The DT9818 is a highperformance USB data acquisition (DAQ)
board that combines the functionalityof multiple boards by providing
simultaneous subsystem operation foranalog input and output, digital I/O, andcounter/timer.

The DT9818 is a high performance, isolated data acquisition board that can bereadily embedded in industrial or laboratory applications. It allows synchronousor asynchronous operation for all the analog, digital, and counter/timer
functions, while running off USB power.

Key Features• 150 kS/s A/D• 150 kS/s/ch D/A• 16 single-ended (SE)/8 differential (DIFF) analog

Flexible Acquisition Modes Using The Input
Channel-Gain List
The DT9818 can acquire data from one or more analog
input channels using an input channel-gain list. A1024-location channel-gain list allows great flexibility inconfiguring channels, sample rates, and gains.

input channels• Two deglitched analog outputs – smooth waveformgeneration

The DT9818 provides two ways to cycle through thechannel-gain list:• 16 DIO, two 32-bit counter/timers• ±500 V galvanic isolation protects signal integrity• Runs on USB power – no external power required• Flexible clocking and triggering• Compatible with LabVIEW and MATLAB• Includes free QuickDAQ software to get up and• Continuous scan mode
• Triggered scan moderunning quickly

Supported Operating Systems• Windows® 10/8/7/Vista®/XP 32/64-bit

AIN 0Analog Input
MUX
AIN nProg
Gain
1,2,4,816-Bit A/DConverter(ENOB=14.1)

DAC 016-bit
D/A

DAC 116-bit
D/ADigital Control& FIFO
(Sync or Async)

USB

500V Isolation Barrier

16SE/8DI

Digital I/O (8/8)
Counter/Timer (2)The ±500 V galvanic isolation allows all analog input, analog output, digital I/O, and counter/timer functions to operate inhigh noise environments. Signal accuracy is maintained despite the presence of large noise spikes on small signal paths. This isespecially critical for embedded applications.
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ENOB –The Accuracy Figure of MeritFlexible Output Modes Using The Output
Channel-Gain List
The DT9818 provides a great deal of flexibility in theoutput of analog and digital signals. For example, output
a single value from a single analog output channel ormultiple values from multiple analog output channels.
An output-channel list gives the flexibility of updating
only the analog output channels desired or updating thedigital output lines with specified analog output channels
at the D/A clock rate. Analog output channels can be
updated at up to 150 kS/s.
The DT9818 features the following output modes:±10 V signal• Continuous output mode
• Waveform mode

100 dB SFDR (Spurious Free Dynamic Range)

High-Speed Digital I/O Lines

14.3 ENOB (Effective Number of Bits)

The DT9818 features one digital input port, consistingof 8 digital input lines and one digital output port,
consisting of 8 digital output lines. The resolution is fixedat 8-bits.

Noise Floor

The following digital I/O operation modes are available:• Single-value operations• Continuous digital I/Ooo Digital input
oo Digital output

The ENOB program has a 1 kHz sine wave on channel 0 witha signal level 0.06 db below full scale and channel 1 is tied
to ground or zero volts. (Full scale is ±10 V). The programis scanning both channels at a 150 kS/s/ch rate. The actual
sample rate of channel 0 would then be 75 kS/s for a Nyquist
Frequency of 37.5 kHz as shown in the graph for channel
0. An FFT is computed on channel zero and displayed. Thesignal to noise plus distortion is 87.75 dB for an Effective
Number of Bits of 14.3. The primary component on the left
side of the chart is the DC component of the signal.

High-Speed, High-Resolution Analog Outputs
The DT9818 provides two streaming analog output
channels. Each analog output channel has its own digitalto-analog converter and provides an output signal rangeof ±10 V. A maximum update rate of 150 kS/s/ch with
16-bit resolution is standard. Ultra-smooth waveforms
can be produced with less than 1.0 nV-sec glitch energy
from the D/As. For gap-free simultaneous stimulus andresponse, the analog output channels can be updated as
the analog input data is acquired. In addition, you canupdate the digital output lines with the analog output
channels at the analog output rate.

Flexible Clocks and Triggers
For maximum flexibility, the DT9818 provides
independent clocks and triggers for the A/D and D/Asubsystems. This allows the analog output subsystem
to be triggered and clocked synchronously with, or
independent of, the analog input subsystem. Eachsubsystem supports an internal clock and external
clock input, as well as the following trigger types:
software command and external digital input trigger.

Multifunction Counter/Timers
The DT9818 features two 32-bit user counter/timers. If
desired, read the value of the counter/timer channels
with the analog input channels and digital input lines at
the A/D clock rate. The following counter/timer functions
are supported: event counting, up/down counting,frequency measurement, edge-to-edge measurement,
continuous edge-to-edge measurement (for determining
the frequency and period width of a signal), rate
generation, one-shot, and repetitive one-shot operations.

(508) 946-5100±500 V Galvanic Isolation Protects Your
Data
Computers are susceptible to ground-spikes throughany external port. These spikes can cause systemcrashes and may even cause permanent damage
to the computer. The DT9818 features ±500 voltsof galvanic isolation to protect the computer fromground-spikes and to ensure a reliable stream of data.

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Uncompromised, High-Integrity PerformanceHigh Throughput
Fast settling
instrumentation
amplifier maintains
high-speed whileswitching channels

Clean Signal Connection
16 SE/8 DIFF analog input
channels

Ultra Digital I/O
Full digital I/O flexibility
for pattern generationand synchronizing withexternal events

Precision
Measurements
True 16-bit
resolution at 150 kS/s
throughput formeasuring dynamic
signals

Fully Protected
500 V galvanic
isolation protects
your computer andmaintains signal
integrity

Full-Featured Counter/Timers
Two 32-bit counter/timers
ideal for automotive
testing applications

No Limits
Full simultaneous
operation of all
subsystems

Pure Signal Generation
Two waveform deglitched
DACs

Designed for
Low Noise
Multi-layer PCB
provides optimal
grounding andshielding to maintainsignal integrity

External Control
Flexible clocks andtriggers

The DT9818 can be embedded into custom applications.

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The in-depth DT9818 block diagram shows
all functions and controls.

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QuickDAQ
QuickDAQ allows you to acquire and display from all
Data Translation USB and Ethernet data acquisition
devices that support analog input streaming. Combine
QuickDAQ with Data Translation hardware to acquiredata, record data to disk, display the results in both aplot and digital display, and read a recorded data file.
Be productive right out of the box with this powerfuldata logging software. Data can be exported to otherapplications like Microsoft Excel® and The Mathworks
MATLAB® for more advanced analysis. Two additional
options can be purchased to add FFT analysis capabilities
to the base package.

QuickDAQ ships free-of-charge and allows you to get up andrunning quickly.

Key Features:

Other Software Options• QuickDAQ Base Package (Free)

There are many software choices available for application
development, from ready-to-measure applications toprogramming environments.

oo Ready-to-measure application software
oo Configure, acquire, log, display, and analyze yourdata
oo Customize many aspects of the acquisition,

The following software is available for use with theDT9818 module and is provided on the Data Acquisition
Omni CD:

display, and recording functions to suit yourneeds• FFT Analysis Option (License Required)oo Includes all the features of the QuickDAQ Base
Packageoo Perform single-channel FFT operations including:◊ Auto Spectrum◊ Spectrum◊ Power Spectral Density
oo Configure and view dynamic performancestatistics
oo Supports Hanning, Hamming, Bartlett, Blackman,
Blackman Harris, and Flat Top response windows• Advanced FFT Analysis Option (License Required)oo Includes all the features of the QuickDAQ Base
Package and FFT Analysis Package
oo Perform 2-channel FFT operations including:◊ FRF◊ Cross-Spectrum◊ Cross Power Spectral Density◊ Coherence◊ Coherent Output Poweroo Supports real, imaginary, and Nyquist display
functionsoo Additional FFT analysis functions supported:
Exponential, Force, Cosiner Taperoo Save data to .uff file format(508) 946-5100• DT9818 Device Driver –The device driver allows you
to use a DT9818 module with any of the supported
software packages or utilities.
• DT9818 Calibration Utility – This utility allows you
to calibrate features of a DT9818 module.
• Quick DataAcq application – The Quick DataAcq
application provides a quick way to get up andrunning. Using this application, verify key featuresof the module, display data on the screen, and savedata to disk.
• DT-Open Layers® for .NET Class Library – Use thisclass library if you want to use Visual C#® or Visual
Basic® for .NET to develop application software
using Visual Studio® 2003-2012; the class librarycomplies with the DT-Open Layers standard.
• DataAcq SDK – Use the DataAcq SDK to use VisualStudio 6.0 and Microsoft® C or C++ to develop
application software using Windows 10/8/7/Vista/
XP 32/64-bit; the DataAcq SDK complies with theDT-Open Layers standard.
• DAQ Adaptor for MATLAB – Data Translation’s
DAQ Adaptor provides an interface between theMATLAB® Data Acquisition (DAQ) toolbox fromThe MathWorks™ and Data Translation’s DT-Open
Layers architecture.
• LV-Link – Data Translation’s LV-Link is a library ofVIs that enable LabVIEW™ programmers to accessthe data acquisition features of DT-Open Layers
compliant USB and PCI devices.

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Accessories

Ordering Summary

For applications where the DT9818
is embedded in other equipment,
the following optional accessory isavailable:

HARDWARE• DT9818-OEM
ACCESSORIES• EP355 — Screw terminal panel• EP355 – This screw terminal
panel plugs into connector
J2 or J3 of a DT9818 andprovides 14-position screw
terminal blocks for attachinganalog I/O and digital I/O
signals.

The EP355 screw terminal panel plugs
into the J2 or J3 connector of a DT9818
module.

Cross-Series Compatibility
Virtually all Data Translation data acquisition modules are compatible
with the DT-Open Layers for .NET Class Library. This means that if yourapplication was developed with one of Data Translation’s software
products, you can easily upgrade to a new Data Translation board. Little or
no reprogramming is needed.

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DT9818 Datasheet		6

FREE SOFTWARE• QuickDAQ• DAQ Adaptor for MATLAB — Access theanalysis and visualization tools of MATLAB®.
• LV-Link — Access the power of DataTranslation boards through LabVIEW™.
OPTIONAL SOFTWARE• QuickDAQ FFT Analysis Option (LicenseRequired)• QuickDAQ Advanced FFT Analysis Option(License Required)info@mccdaq.com

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June 2017. Rev 3© Measurement Computing Corporation