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8MHz 16-bit Analog Waveform Output USB Board

Acces I/O



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Product Datasheet

Product Manual

This product is RoHS-compliant

Please contact us if you require a non-RoHS version.

Please note, Acces I/O products are often available in an array of different options, of which only a selection will be displayed here. Please contact us for pricing if you require a product option that is not shown on our website.

The USB-AO-ARB1 is an ideal solution for adding portable, easy-to-install high-speed analog output capabilities to any computer with a USB 2.0 port. The USB-AO-ARB1 is a USB 2.0 High-Speed device and is plug-and-play allowing quick connect or disconnect whenever you need additional I/O on your USB port.

The USB-AO-ARB1 features 1 single-ended analog output on a standard female BNC connector, at up to 8MHz of continuous transfers through a 32 kByte (16kSample) on-board FIFO. A programmable frequency source allows configurable output rates from 1K through more than 8MHz. A jumper-selected analog output range of 0-2.5V, 0-5V, 0-10V, ±2.5V, ±5V, or ±10V ensures broad application compatibility. The analog output is enabled/gated by a signal applied to either a pin on the IDC or the second BNC.

In addition to the analog output, there are 8 digital I/O channels configurable as 2 4-bit ports for input or output (see block diagram). The digital I/O wiring connections are via a standard, 0.1" spacing, 2x8 pin, male, shrouded, keyed connector.

All required power is normally supplied to the board via the USB cable. For higher current sourcing capabilities external power may be used. The USB-AO-ARB1 is designed to be used in rugged industrial environments but is small enough to fit nicely onto any desk or testing station. The board itself 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 pre-drilled mounting holes match the PC/104 form factor (without the bus connections). This ensures easy installation using standard standoffs inside most enclosures or systems. The board can be added to any PC/104, PCI-104, or PCI/104-Express stack by connecting it to a USB 2.0 port usually included on-board with embedded CPU form factors. This is especially important since many newer CPU chipsets do not support ISA and have plenty of USB ports. The USB-AO-ARB1 OEM board can also be installed using standoffs inside other enclosures or systems. For embedded OEM type applications, an additional miniature USB input header is provided in parallel with the type B connector.

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 loose 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.


  • Testing and Debugging
  • Laboratory Automation
  • Manufacturing Test
  • Image Capture
  • Process Monitoring
  • Datasource Emulation
  • Embedded OEM


Available accessories include a variety of cables and screw terminal boards for quick and easy connectivity.


The USB-AO-ARB1 utilizes a high-speed custom function driver optimized for maximum continuous data throughput of 16 MB/s that is hundreds to thousands of 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 on the advantage of high-speed USB 2.0. The boards are supported for use in most USB supported operating systems and includes a free Windows and Linux compatible software package. This package contains sample programs and source code in C# (.NET), Delphi, and Visual C++, for Windows. Third party support includes a Windows standard DLL interface usable from the most popular application programs and includes example LabVIEW VIs. Embedded OS support includes XP Embedded and Windows Embedded Standard.