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USB 8 Channel Analog Output Module


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  • High-speed USB 2.0 device, USB 1.1 compatible
  • Small, portable 8-channel, 12-bit, digital to analog outputs
  • Double-buffered allowing simultaneous update of all DACs
  • Computer generated outputs up to 5kHz simultaneous (up to 40kHz total)
  • Analog output ranges of 0-2.5V, 0-5V, 0-10V, ±2.5V, ±5V, ±10V
  • Single-ended and differential outputs on separate connectors
  • Custom high-speed function driver
  • PC/104 module size (3.550" by 3.775") and mounting compatibility
  • Rugged small-sized (4" x 4" x 1.25") steel enclosure
  • Type B USB connector features industrial strength and high-retention design


  • Resistors in series with differential connector for impedance matching
  • DIN rail mounting provision
  • Economy 'E' version available without screw terminal adaptor
  • OEM (board only) version with PC/104 mounting holes and PCB footprint for added flexibility in embedded applications




The USB-DA12-8E is an ideal solution for adding portable, easy-to-install analog outputs to any computer with a USB port. The USB-DA12-8E is a USB 2.0 device, offering the highest speed available with the USB bus. It is fully compatible with both USB 1.1 and USB 2.0 ports. The board is plug-and-play allowing quick connection whenever you need additional I/O on a USB port.

The USB-DA12-8E features 8 digital-to-analog converters (DACs) with both differential and single-ended outputs on separate connectors. The board features a variety of unipolar and bipolar ranges for each DAC giving the user a variety of options. The DACs can be updated individually or simultaneously. To ensure that there will not be excessive outputs to external circuits when the board is plugged in, automatic circuits limit analog outputs to zero volts. Power is supplied to the board via an external power supply which powers on board DC/DC converters which provide ±12V to the operational amplifiers on the board. The I/O wiring connections for USB-DA12-8E are via an industry standard, IDC type 26-pin, 16-pin, and 10-pin connectors.

The USB-DA12-8E is designed to be used in rugged industrial environments but is small enough to fit nicely onto any desk or testing station. The board is PC/104 sized (3.550 by 3.775 inches) and ships inside a steel powder-coated enclosure with an anti-skid bottom.


The OEM (board only) version is perfect for a variety of embedded applications. What makes the OEM option unique is that its PCB size and mounting holes match the PC/104 form factor (without the bus connections). This allows our rugged digital board to be added to any PCI-104 or PC/104 stack by connecting it to a simple USB port usually included on-board with embedded CPU form factors such as EBX, EPIC, and PC/104. This is especially important since many newer CPU chipsets do not support ISA and have plenty of USB ports. The USB-DA12-8E OEM board can also be installed using standoffs inside other enclosures or systems.

High Retention USB Connector

The ever-growing presence of USB in the industrial/military marketplace has driven the need for USB connections to be reliable, dependable, and unfailing. Gone are the days of lose USB connections. A type B USB connector is used on all ACCES USB/104 products which features a high retention design that complies with the class 1, Div II minimum withdrawal requirement of over 3 pounds of force (15 Newtons). This connector has an orange color-coded insulator to quickly differentiate it from standard USB connectors. Using these USB connectors increases reliability in your system and ensures a tight connection. For embedded OEM type applications, an additional miniature USB input header is provided in parallel with the type B connector.



  • Portable
  • Laptop
  • Education
  • Laboratory
  • Industrial Automation
  • Embedded OEM



The USB-DA12-8E is plug-and-play which allows quick connect or disconnect whenever you need additional I/O on your USB port. The module utilizes a high-speed custom function driver optimized for a maximum data throughput that is 50-100 times faster than the USB human interface device (HID) driver used by many competing products. This approach maximizes the full functionality of the hardware along with capitalizing the advantage of high-speed USB 2.0. The USB-DA12-8E is supported for use in most USB supported operating systems and includes a free Linux and Windows 98se/Me/2000/XP/2003 compatible software package. This package contains sample programs and source code in Visual Basic, Delphi, C Builder, and Visual C for Windows. Also incorporated is a graphical setup program in Windows. Third party support includes a Windows standard DLL interface usable from the most popular application programs. Embedded OS support include Windows XPe.


The following items are included with your shipment, depending on options ordered.

  • Standard USB-DA12-8E Module
  • ADAP25 Screw Terminal Adapter
  • 6' USB Cable
  • Software Master CD
  • USB I/O Quick-Start Guide

Optional Accessories

  • ADAP25(M) Screw Terminal Adapter (an additional unit could be needed if you intended on using the Single-Ended and the Differential Analog Outputs)
  • -PR, Power Adapter AC/DC 5V regulated (if total current >500mA)
  • -DIN, DIN Rail Mounting Provision


Analog Outputs

Number of Outputs: 8 channels
Type of Outputs: Single-ended or differential
Resolution: 12-bit resolution
Unipolar Ranges: 0-2.5V, 0-5V, 0-10V
Bipolar Ranges: ±2.5V, ±5V, ±10V
Conversion Rate: 5kHz, all channels simultaneous
Relative Accuracy: ±2 LSB typical
Differential Non-linearity: ±0.2 LSB typical
Settling Time: 8us typical, 10us max.
Output Current: 5mA


Operating Temperature Range: 0° to 70°C.
Storage Temperature Range: -40° to 85°C.
Humidity: 5% to 95% non-condensing
Board Dimension: 3.550 x 3.775 inches
Box Dimension: 4 x 4 x 1.25 inches


5VDC provided via USB bus up to 500mA**
** Optional on-board external power circuitry and AC/DC adapter can be ordered (“-P” option) if current use is expected to be greater than what can be supplied by the USB bus. Please check to see how much current your USB port can supply and how much current you anticipate using.

Part Number Price(USD)
USB-DA12-8E Enclosure, module and screw terminal board
USB-DA12-8E-E Economy model (no screw terminal board)
USB-DA12-8E-OEM Board only (no enclosure or screw terminal board)
MP104-DIN DIN rail mounting provision
-P External power and AC/DC adapter

View / Download Manual (in .pdf format)

Acquisition Control Communications Engineering / Systems


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