DT9824

High Stability, High Accuracy, Fully
Isolated USB Data Acquisition
ModuleOverview
The DT9824 USB data acquisition (DAQ) module offers
the highest stability and accuracy for measuring analog
signals. Every signal input, both analog and digital ,is fully isolated from each other. This technology ISOChannel™, guarantees that all signals are protected fromany environmental or system noise.

The DT9824 provides ultra-high accuracy and stability while
also providing ISO-Channel protection from any noiseconditions. Each analog input is galvanically isolated fromany other input and has its own return path. This means that
other “grounds” or return paths from other signals or fromthe computer have no possibility to interfere with an ISOChannel input or return. The shielded steel enclosure, 1U by½ rack, further enhances noise immunity.

The high stability design of these modules offer four
distinct advantages:• 10 ppm accuracy• a temperature coefficient of ±0.05 µV/° C• a CMRR of greater than 150 dB• 1.5 ppm maximum noise
These features deliver data acquisition results that are
twenty times better than the normal solution fromanother system.
These modules are ideally suited for chromatography,seismic, weigh scale, and medical applications whereaccuracy and stability are imperative. The rugged,
compact module is fully powered by USB and can be used
as a portable device or mounted in a rack. Includes free
QuickDAQ software to get up and running quickly.

Key Features• Voltage Inputs
oo 4, simultaneous analog input channels with

24-bit resolution
oo ±500 V galvanic isolation: ISO-Channel

technology provides channel-to-channel
protection that guarantees noise immunity
oo Maximum flexibility for any signal input: input
ranges of ±10 V, ±1.25 V, ±0.625 V, ±0.3125 V• Advanced Sampling Modes
oo Sample rates up to 4800 S/s per channel
oo Continuously-paced analog input operations
oo Software-selectable trigger typeoo Channel gain list allows measurement of any
combination of channels/gains• Isolated Digital I/O
oo 8 opto-isolated digital input lines
oo 8 opto-isolated digital output lines
oo Galvanically isolated digital I/O to 250 V
oo Read the digital input port through the analoginput

The ENOB (Effective Number of Bits) chart shows the lowlevel of noise, baseline noise at better than 21 bits,with zerosignal at the input (input shorted) that is generated at theoutput. ENOB chart is an FFT plot that points out harmonics
and other error producing results. Other plots at various
input ranges are shown on the following pages.

Supported Operating Systems• Windows® 10/8/7/Vista®/XP 32/64-bit(508) 946-5100

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Analog Inputs

Digital I/O Operation Modes

The DT9824 module supports four, simultaneous, analog
input channels, configured differentially. The analog
input resolution of the DT9824 module is 24 bits but
programmable gains allows even greater resolution. TheDT9824 module can acquire data from a single analog
input channel or from a group of analog input channels.
Analog input channels are numbered 1 to 4.

The following digital I/O operation modes are supported
for the DT9824 module:• Single-value operations• Continuous
Digital I/O Channel-to-Channel Isolation
The DT9824 module includes channel-to-channel isolationof up to 250 V between digital I/O lines. Greater channelto-channel isolation, can be achieved by using every otherdigital line. This reduces the number of digital I/O lines,
but provides channel- to-channel isolation of 500 V (onechannel can be +250 V while the adjacent channel can be–250 V).

Input Ranges and GainsThe DT9824 module has a bipolar range of ±10 V. In
addition, there are choices of 5 gains (1, 8, 16, or 32). The
table below lists the supported gains and effective input
range of each input range on the DT9824 module.
Effective Input RangesGain

Bipolar Input RangeAccessories

1±10 V8±1.25 V

16± 0.625 V

The following optional accessories are available for theDT9824 module:

32± 0.3125 V• STP37 screw terminal panel — The STP37 permits
easy screw terminal connections for accessing thedigital I/O signals on a DT9824 module.
• Rack-mount kits
oo EP379 — Single rack mount kit to rack mount asingle module
oo EP380 — Dual rack-mount kit to rack mount twomodules side by side

The DT9824 module uses offset binary data encoding forthe ±10 V bipolar range.

Triggers
A trigger is an event that occurs based on a specified setof conditions. The DT9824 module supports the followingtrigger sources:• Software trigger• External trigger
Analog Input Conversion Modes
The DT9824 module supports the following conversion
modes:• Single-value operations• Continuous mode
The conversion rate is determined by the frequency ofthe A/D sample clock.

Digital Input Lines
The DT9824 module features eight, isolated, digital inputlines. Digital inputs operate from +3 VDC to +28 VDC,
with a switching time of 2 ms maximum.

Digital Output Lines
The DT9824 module features eight, latched and isolated
digital output lines. The outputs are solid-state relays that
operate at ±30 V and 400 mA peak(AC or DC). Switchingtime is 2 ms maximum.

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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

The following software is available for use with theDT9824 module and is provided on the Data Acquisition
Omni CD:oo Customize many aspects of the acquisition,

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• DT9824 Device Driver –The device driver allows youto use a DT9824 module with any of the supported
software packages or utilities.
• DT9824 Calibration Utility – This utility allows you
to calibrate features of a DT9824 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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USB LEDIndicator

USB Processor

Isolated DigitalInputs

37-pin digital I/O D-shellconnector, plus trigger

USB 2.0 PortMemory

Poly-fused high-current
AC & DC digital
outputs reset after
fault removed

FPGA

Fully shielded ground plane on
both sides of board to give EMI& ESD protection.

2 Status LEDs, Trigger & Power
4 individual ISO-Channel 24-bit
analog inputs, giving high stability,
high accuracy, and high common
mode rejection.

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4 individual ISO-Channel analog
inputs on pluggable connectors

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Detailed circuit picturewith callouts.
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DT9824

ISO-Channel™ Input 1Isolated
DC-DCAuto Zero

1234123ESD
PGA
Gains
1-8-16-32

N/C

24 BitA/D±500 V

ESD
Analog 1 Return

4

Channel 1

ISO-Channel™ Input 2234123PGA
Gains
1-8-16-32

24 Bit
A/D±500 V
250 V

ESD

Trigger

Analog 2 Return

4Channel 2Control
FPGA

ISO-Channel™ Input 3234123PowerLED

Isolated
DC-DCAuto Zero

18 Dig Out
8 Dig In

ESDN/C37 Pic D-Shell
Connector

1250 V

64KB
SRAM

Isolated
DC-DC

Auto ZeroTrigger
LEDESDPGA
Gains
1-8-16-32

N/C

24 Bit
A/D±500 VUSB
LEDUSB 2.0Processor

USB
2.0ESD
Analog 3 Return

4Calibration
ROMChannel 3ID
ROM

ISO-Channel™ Input 4Auto Zero

12341234Isolated
DC-DC

ESD
PGA
Gains
1-8-16-32

N/C

24 Bit
A/D±500 V

ESD
Analog 4 Return

Channel 4The DT9824 block diagram shows the 4 separate ISO-Channel analog inputs with their separate “ground” return paths. Eachanalog input has its own 24-bit sigma-delta A/D and auto-zero programmable gain amplifier (PGA) to achieve unprecedentedstability and accuracy. CMRR is better than 150 dB, system gain error of better than ±0.003%, system zero error of less than
±50 uV, give accuracy and stability performance beyond any other solution.

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Ordering Summary
HARDWARE• DT9824 — High Accuracy, Simultaneous USB
Data Acquisition (DAQ) ModuleACCESSORIES• EP379 — Dual-Rack mount kit• EP380 — Single-Rack mount kit• STP37 — Screw Terminal Panel
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™.
OPTIONAL SOFTWARE• QuickDAQ FFT Analysis Option (LicenseRequired)• QuickDAQ Advanced FFT Analysis Option(License Required)

ENOB results are shown for input ranges at one-half full scale (-6 dB) and at fullscale. The ENOBs are a small amount lower as the input range increases due toslew rate limitations on the amplifier at 18.3 bits and 17.2 bits. These are muchhigher than comparable solutions, giving greater accuracy and stability.

(508) 946-5100		
DT9824 Datasheet		

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May 2017. Rev 8© Measurement Computing Corporation