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Model DI-1120

Data Acquisition USB DAQ and Data Logger System, 14-bit, 160,000 S/s Throughput

Out of

This product is now obsolete. Consider the DI-4208-U as a replacement.

  • Includes a DI-1120 instrument, a 6-foot USB cable, a screwdriver for signal connections, and downloadable WinDaq software
  • Direct replacement for the DI-155 data acquisition start kit (compare)
  • Four armored analog differential inputs
    • Programmable range per channel: ±2, 5, 10, 20, 50, 100 V full scale
    • Up to 120 V rms without damage
    • 80 dB common mode rejection
  • Supports ChannelStretch™ multi-unit synchronization - Unlock code required per device - see Accessories
  • Adaptable low-pass filter per channel
    • Corner frequency set as a function of sampling rate
  • 12 to 14-bit analog-to-digital resolution
  • 160 kHz sample throughput rate
  • Seven digital ports
    • Programmable per port as input or switch
    • Support for rate measurements to 50 kHz
    • Support for 16-bit counter
  • Wide-ranging software support includes:
    • Ready-to-run WinDaq software
    • Published protocol for software development in non-Windows operating systems
  • Use the DI-1120 Resolution Calculator to determine how small a change you can detect
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DI-1120 Data Acquisition Starter Kit
This data acquisition system features 12 to 14 bit adc measurement resolution (dependant on sample rate)This data acquisition unit features four analog inputsThis data acquisition system is expandable with ChannelStretch allowing you to connect multiple units and synchronize data recording.This data logger features 7 digital portsThis data logger features a plus/minus 2 Volt full scale range to a plus/minus 100 Volt full scale range.This data acquisition system can sample and record data at up to 160,000 sample per second throughput
This data logger has a USB interfaceGet same day shipping when you order this data logger before 3PM ETThis data acquisition system has a 30-day Money back guaranteeThis data logger is manufactured in the United States of America


DI-1120 USB Data Acquisition starter kit with Windaq software. Features 4 differential analog input channels, 14-bit measurement resolution, and a full scale range of ±2V to ±100V.

Model DI-1120 delivers premium analog performance at a surprisingly affordable price. Four analog input channels provide differential measurement flexibility and programmable ranges per channel of ±2, ±5, ±10, ±20, ±50, and ±100 V full scale. The differential input configuration provides noise rejection, easily adapts to single-ended signal sources, and is protected to 120 V rms so that inevitable measurement mishaps will not harm the instrument. The front end feeds a variable resolution, 14-bit ADC that ranges from 12 to 14 bits as a function of sampling rate. Lower sampling rates deliver higher resolution readings. The maximum sampling throughput rate of the DI-1120 is 160 kHz, providing 12 bits of resolution. Below 40 kHz the instrument provides 14-bit measurement resolution. Rounding off the analog subsystem are low-pass filters per channel with automatic corner frequency selection as a function of sampling rate. All these features combine to provide pure data acquisition power at an unmatched price point.

The DI-1120 provides 7 digital ports, each configurable as an input or a switch. Input protection is provided to 25 V. When activated as inputs two ports allow dual functionality as discrete inputs, or can be programmed as a counter or rate input respectively. The rate input features a 50 kHz maximum measurement, allocated over twelve programmable measurement ranges (10 Hz to 50 kHz full scale.) The counter input provides 16-bit resolution and a terminal count value of 65,535. The discrete, counter, and rate inputs are members of the same internal scan list used by the analog input channels. This means that all enabled elements are acquired synchronously, which allows meaningful comparisons between analog and digital channels. For example, the rate input measuring engine speed allows rpm data to be acquired in lock-step with analog data. Configured as a switch a digital port can be used to control external loads up to 25 V @ 100 mA, and the switch can be controlled asynchronously during scanning.



DI-1120 Unlock Code

WinDaq Unlock Code


Unlocks WinDaq for ChannelStretch™ capability allowing you to record synchronous data with multiple devices. Unlock Code required for each device. Unlock Code ONLY. No CD will be shipped. Please Note: If you are ordering this software for a device you already own, you MUST provide the serial number of your device under "Order Notes" during checkout to receive the unlock code. Please allow one (1) business day for processing.


4-20mA Current Loop Shunt Resistor

$ 2.99
R250 Shunt Resistor


250 Ω ±0.1% Precision, Metal Film, 1/2W, Axial Resistor
Exceptionally low noise; typically 0.10 μV/V
Low voltage coefficient to ±5 ppm/V
Flame retardant coating. RoHS compliant. Learn More


USB Ferrite Choke

Ferrite Choke


Ferrite choke reduces interference for USB-based data acquisition products.


USB Cable

Dual Ferrite USB cable for ChannelStretch


Optional USB Cable for use with ChannelStretch™. Dual ferrite cores provide maximum protection against ground bounce that could lockup your PC's USB port during data acquisition. 20.4-inch (520 mm) overall cable length. Recommended whenever products are deployed in our ChannelStretch™ configuration.


7 Port USB Hub



Powered 7 port USB hub to synchronize multiple USB devices. Please note: Not all DATAQ Instruments devices support synchronization - check your product datasheet or product page for detailed information. Note: Provided with a US ac adaptor only, and is not suitable for use in countries that require an ac mains connector other than the US type.



Data Acquisition Recording and Playback Software

Included FREE with your DI-1120 purchase. Data Acquisition Recording and Playback Software. Records at the maximum sample rate of the instrument. Unlock code required for ChannelStretch™

WinDaq Data Acquisition Software


Drivers only Download

Installs drivers for all contemporary data acquisition hardware products that support WinDaq software.

Starter Kit Drivers


WinDaq-to-Excel Real Time Link

Real-time data logging directly to Microsoft Excel (supports MS Office 2003 or higher). No programming required. Free Trial Version. Purchase full version on WinDaq/XL product page.

WinDaq Data Acquisition Software


Solutions for .NET Programming Environments

FREE .Net control communicates directly with your DATAQ Instruments device using any .Net programming language. Detailed sample programs included. Fully documented help file. Requires .NET Version 4


Python Example Programs

Available on GitHub

FREE Python example programs using the fully documented device protocol. All sample programs are well-commented to help you get up and running quickly.

DATAQ Python Example Programs

MATLAB Example Program

Program in Protocol Level

Learn how to program with MATLAB® in protocol level. Does not require MathWorks' Data Acquisition Toolbox.


LabView Example Programs

Available on GitHub

FREE LabView example programs using the Dataq's ActiveX Controls. All sample programs are well-commented to help you get up and running quickly.

DATAQ LabView Example Programs


Analog Inputs
Number of Channels: 4
Configuration: Differential
Full Scale Range: ±2, 5, 10, 20, 50 100 V full scale
Input impedance: 795 kΩ
Absolute accuracy: @ 25°C, excluding common mode error, 0.25% of full scale range
Absolute maximum input without damage: 120 V rms(normal mode + common mode)
Maximum common mode voltage: 120 V rms
Common mode range: ±20 V dc or peak ac
Common mode rejection ratio: 50 dB (dc - 60 Hz)
Channel-to-channel crosstalk rejection: -80 dB
Digital Inputs
Number of ports: 7
Type: MOSFET switch
Threshold levels: TTL-compatible
Absolute maximum applied voltage (V): 25 V dc
Programmed as a Switch  
Maximum drain voltage: 25 V
Maximum sink current: 100 mA
Internal pull-up value: 4.7 kΩ
Input high voltage threshold: 2.4 V
Input low voltage threshold: 0.8 V
Terminal count: 65,535
Maximum rate frequency: 50 KHz with one enabled channel, 20 KHz with 2-4 enabled channels, 10 KHz with 5-7 enabled channels
Minimum rate frequency: 0.5 Hz
Maximum count frequency: 50 kHz
Reserved Digital Inputs  
D0: WinDaq remote events
D1: WinDaq remote start/stop
D2: Rate input
D3: Count input
Power Consumption: <1.0 Watt, via USB interface
ADC Characteristics
Resolution: 12 to 14-bit (Calculate)
Above zero ADC counts: 2,047 to 8,191
Below zero ADC counts: 2,048 to 8,192
Maximum sample throughput rate: 160,000 S/s
Minimum sample throughput: 20 S/s (2.2 samples per hour with WinDaq)
Sample rate timing accuracy: 50 ppm
Indicators and Connections
Interface: USB 2.0 (mini-B style connector)
Indicator lights: 3 LEDs: Power, Active, Event
Input Connections: Two 16-position terminal strips
ChannelStretch™ Operation
Maximum number of DI-1120 units: 16
Maximum channel count: 64 analog, 112 digital
Maximum supported throughput: ≥480 kHz
Synchronization compatibility: DI-4108, DI-4208, DI-4718B
Synchronization conditions: All instruments must be configured for the same sample rate per channel, ≤20 kHz. Enabled channels per instrument are independent of measurement function and range.
PC USB prerequisite: All instruments must be connected to the same USB controller. The use of USB hubs are recommended to meet this requirement.
Operating Temperature: 0 to 50 °C
Operating Humidity: 0 to 90% RH non-condensing
Storage Temperature: -20 to 60 °C
Storage Humidity: 0 to 90% non-condensing
Physical Characteristics
Enclosure: Polycarbonate ABS, 0.080 inch thickness
Mounting: Desktop; bulkhead
Dimensions: 2.625D × 5.5W × 1.53H in. (6.67D × 13.97W × 3.89H cm.)
Weight: 5.7 oz. (162 grams)
Software Support
WinDaq software: OS support
Programming: Instrument protocol, ActiveX Control


DI-1120 USB DAQ Video Playlist
DI-1120 Tutorials

The DI-1120 USB DAQ Videos and Tutorials.
How to make 4-20mA current measurements using the R250 and a Data Instruments Data Logger
4-20mA Measurements

Learn how to connect a 4-20mA signal using the R250 shunt with Dataq products.
Introducing the DI-710 Voltage Data Acquisition and Data Logger System
Adaptable Anti-aliasing Filters

See how DATAQ's anti-aliasing filters work.
Exporting Data to Excel
Export data to Excel

Learn how to export data from WinDaq Waveform Browser to Microsoft Excel.
Introduction to WinDaq Data Acquisition Software
WinDaq Data Acquisition Software

Introduction to WinDaq Data Acquisition Software.

Similar Products

Quick Product Comparison

Expansion with
other models (DI-)
Max Sample
Rate (Hz)
1100 4 ±10 V - 40,000 - 12 2 In - - -
2108 4 or 8 ±10 V - 160,000 Yes 12-14 7 Bi Yes Yes Yes
2108-P 4 or 8 B 2108-P 160,000 Yes 16 7 Bi Yes Yes Yes
4108 4 or 8 C 4108, 4208, 4718B, 4730 160,000 Yes 12-16 7 Bi Yes Yes Yes
4208 4 or 8 A 4208, 4108, 4730, 4718B 160,000 Yes 12-16 7 Bi Yes Yes Yes

*Expand with ChannelStretch™. Compatibility with other units dependent on model.

Use the following chart to determine Measurement Ranges:

±2 V
±5 V
±10 V
±20 V
±50 V
±100 V
±2.5 V
±5 V
±10 V
0-5 V
0-10 V
±200 mV
±500 mV
±1 V
±2 V
±5 V
±10 V