DT9844

32-Channel Analog Input USB DAQ ModuleOverview
The DT9844 is a high-accuracy (20-bit resolution),high- speed (1 MS/s sample rate) USB data acquisition
module offering unparalleled performance. The speciallydesigned circuitry on this module reduces crosstalk
between channels, and when combined with the free
QuickDAQ software, provides a high-performancemeasurement solution for even the most sophisticatedapplications. This module provides 32 single-ended (SE)or 16 differential (DIFF) analog input channels Digital
input and counter/timer data can be synchronously
acquired with the analog input data.

The DT9844 is available in two configurations: STP connection
box or OEM embedded version. Combine with the free
QuickDAQ software for an isolated, easy-to-use measurement
solution at the highest throughput and accuracy.

• ±500 V Tri-Sectional Galvanic Isolation: prevents

Key Features• Highest accuracy/sample rate available anywhere:

digital interference with precise analog signals…
preserves signal integrity• Full simultaneous operation of all functions: 32 A/Dchannels, 32 DIO, 5 counter/timers• Choice of packaging: USB DAQ module or OEM
embedded board• Includes free QuickDAQ software to get up andrunning quickly

20-bit @1 MS/s, ±10 V range, 20 µV, 1 ppm resolution• Lowest noise/crosstalk: -80 dB at 1 kHz, 500 kHz
settlingFeatures Summary

Supported Operating Systems• Windows®
10/8/7/Vista®
Throughput
Digital InDigital Out 32/64-bit
Counters

Analog InResolution

Input
RangesDT9844-32-STP

32 SE/16 DIFF

20-bit±10 V

1 MS/s16165STP

DT9844-32-OEM

32 SE/16 DIFF

20-bit±10 V

1 MS/s16165OEM

ModulePackaging

The block diagram of the DT9844 shows the ±500 V isolation between three subsystems and the host computer. All circuitry isdesigned to preserve the lowest noise for analog data acquisition.
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Digital I/O Connections

Easy Screw Terminal Connections
STP Connection Box

Access all of the digital I/O signals through screw terminals

Counter/TimerConnections
Access all of thecounter/timer
signals throughscrew terminals

Analog Input Connections

External Clock & Trigger Connections

Access 32 single-ended or
16 differential analog inputs
through screw terminals

Access the external A/D clock and trigger
signals through screw terminals

The STP connection box is available for easy signal connections on the 32-channel version of the module

STP Box Assembly
Pluggable Screw Terminals
Easy wiring
Faceplate of STP Connection Box
Easy signal connections

OEM Embedded Version
DT9844 board

CE-Compliant Enclosure
Maintains signal integrity

The STP connection box packages the OEM embedded version of the DT9844 in a CE-compliant enclosure with screw terminal
connections.

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Metal Shield Prevents
Noise Coupling from
External CircuitryUncompromised, High-Integrity Performance
OEM Embedded Version

From ESD, EMI, and RFI
Wide Bandwidth
Amplifiers For Fast
Settling and Low
Noise

Multiple Isolation Blocks
All sections are isolated
to ±500 V so that digital
signals don’t interfere withanalog signals, preserves
signal accuracy.

500 kS/s/ch sample rate
settles to 0.01% (2 µsec)
Precision
Measurements

USB Power Block

True 20-bit resolution
at 1 MS/s sample rate
for measuring dynamic
signals with no cross-talk

Digital I/O, Counter/Timer,Clocks

Critical Analog
Circuitry

A/D Section

Located underneaththe metal shield

Ultra Digital I/O
Full digital I/O flexibility
for time stamping,pattern recognition,and synchronizing withexternal events

No Limits
Full simultaneous
operation of all
subsystems

Full-Featured
Counter/Timers...
Five 32-bit counter/timersExternal Control

Designed for
Low Noise

Flexible clocks andtriggers

8-layer PCB provides
optimal grounding andshielding to maintainsignal integrity

Flexible Power
Connections

High-Speed USB 2.0
USB 2.0 connector;
a secondary USB 2.0
connector is provided forembedded applications+5 V connector;
a secondary +5 V
connector is providedfor embeddedapplications
Euro Card Compliance...
100 mm size

Screw terminal panels are available for the OEM embedded version.

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Below are images highlighting the superior dynamic performance characteristics of the DT9844 using QuickDAQ.

Noise Level

Total Harmonic Distortion (THD)

Spurious Free Dynamic Range (SFDR)(508) 946-5100

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High-Speed, High-Resolution Analog Inputs

Flexible Clocks and Triggers

DT9844 modules can be configured as 32 single-ended
or 16 differential inputs. All analog input signals are
multiplexed to a single analog-to-digital converter. Themodule features sample rates up to 1 MS/s on a single
channel with 20-bit resolution and an input range of±10 V.

Each subsystem supports an internal clock and external
clock input, as well as the following trigger types:
software command, analog threshold, and external
digital input trigger.

Note: If using more than one channel requiring the sameaccuracy, the maximum frequency goes to 640 kS/s.

The DT9844 module is available in two packaging
configurations: an STP connection box or an OEM
embedded version.

Flexible Packaging Configurations

Flexible Acquisition Modes

The STP configuration is enclosed in a metal box withscrew terminals for connecting all signals. It ships with a+5 V galvanically isolated power supply and power cable(EP361), USB 2.0 cable, and Data Acquisition Omni CD.

Using the DT9844, you can acquire a single sample froma single analog input channel or multiple samples frommultiple analog input channels. A 1024-location channelgain list gives you the flexibility to sample non-sequentialanalog input channels, analog input channels withdifferent gains, and digital inputs and counter/timer
channels with the analog input channels you want at theA/D sample rate.

The OEM configuration, ideal for embedding in test
systems, provides all the functionality of the DT9844 in
PC-board form. This configuration ships with a USB 2.0
cable and Data Acquisition Omni CD.

High-Speed Digital I/O Lines

PowerThe DT9844 features a digital input port and a digital
output port. The digital input port can consist of 16or 32 digital input lines depending on the resolution,
which is programmable. If the digital input subsystem
is programmed for a resolution of 16, 16 digital output
lines are available through the digital output port. (Notethat if the digital input subsystem is programmed for aresolution of 32, no digital output lines are available.)
The first eight digital input lines can also be used forinterrupt on change. You can read all the digital input
lines simultaneously with the analog input channels at
the A/D clock rate. The digital input lines can also beclocked separately as the only channel in the channel-gainlist at up to 1 MS/s.

The STP connection box includes a +5 V power supply
and power cable for quick setup. OEMs can purchasethese options separately as EP361. A secondary power
connector is also provided for OEMs to allow custom
power wiring.

Multifunction Counter/Timers

Cross-Series Compatibility

All DT9844 modules feature five 32-bit user counter/timers. If you wish, you can read the value of thecounter/timer channels with the analog input channels
and digital input lines at the A/D clock rate. Thefollowing counter/timer functions are supported: eventcounting, edge-to-edge measurement, continuous edgeto-edge measurement (for determining the frequency
and period width of a signal), continuous pulse output,
one-shot, repetitive one-shot, and up/down counting
operations.

Virtually all Data Translation data acquisition modules
are compatible with the DT-Open Layers® software
standard. This means any application developed with
one of Data Translation’s software products can easily be
upgrade to a new Data Translation module with little tono reprogramming needed.

±500 V Galvanic Isolation Protects Your Data
Computers are susceptible to ground-spikes through any
external port. These spikes can cause system crashes andmay even cause permanent damage to your computer.
DT9844 modules feature a 500 V galvanic isolation
barrier that isolates each subsystem from each other andfrom the host computer to protect your computer fromground-spikes and to ensure a reliable stream of data.

Programmable gates, clocks, and output signals are also
supported.

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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 FeaturesOther 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 theDT9844 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 BasePackage
oo 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 displayfunctions
oo Additional FFT analysis functions supported:
Exponential, Force, Cosiner Taperoo Save data to .uff file format(508) 946-5100• Device Driver –The device driver allows you to use aDT9844 module with any of the supported software
packages or utilities.
• Calibration Utility – This utility allows you tocalibrate features of the DAQ 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 Visual
Studio 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 for OEM Configurations

Ordering Summary

For applications where you want to embed a DT9844 module inside otherequipment, use the OEM packaging configuration (no enclosure) with thefollowing optional accessories:• EP355 — This screw terminal panel plugs into connector J2 or J3 on
the OEM version of a DT9844 module and provides 14-position screw
terminal blocks for attaching analog inputs and digital I/O signals.
• EP361 — A +5 V power supply. It is included with the STP connectionbox.

DAQ MODULES• DT9844-32-STP• DT9844-32-OEM
ACCESSORIES• EP355 — Screw terminal panel for attachinganalog input and digital I/O signals (for OEMconfigurations only).
• EP361 — A +5 V power supply (included withSTP configurations).
• BNC DIN Rail Kit — Kit for mounting USB
modules in BNC or STP enclosure to a DINrail. Includes mounting clips, screws, andinstructions. DIN Rail not included.
FREE SOFTWARE• QuickDAQ• DAQ Adaptor for MATLAB — Access theanalysis and visualization tools of MATLAB®.
• LV-Link — Access the power of Data
Translation boards through LabVIEW™.

The EP355 screw terminal panel plugs into the J2 or J3 connector on the OEM
version of the DT9844 module.

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OPTIONAL SOFTWARE• QuickDAQ FFT Analysis Option (LicenseRequired)• QuickDAQ Advanced FFT Analysis Option(License Required)info@mccdaq.com

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June 2017. Rev 5© Measurement Computing Corporation