Middleboro, Mass.Data acquisition equipment vendor Measurement Computing Corp. now offers three 16-bit high-drive analog-output USB (Universal Serial Bus) devices. These are intended for use on PC-based data-acq systems, where they can provide 100-Hz/channel throughput.
Measurement Computing says these latest products were engineered to incorporate many user-suggested features. Part of the company's USB-3100 Series of modules, these modules use an architecture that virtually eliminates dead-band (un-responsive) codes. In addition, the product line is factory calibrated and ready for system deployment out-of-the-box.
The modules use Texas Instruments DAC8554 converter chips. These develop uni-polar or bi-polar 10-V output levels. differential non-linearity is ±1.25 LSB (typical) with -2 LSB to +1 LSB maximum.
At 5 x 3.4 x 1.4-in. in size, USB-3100 Series modules are large enough to make connecting field wiring straightforward, yet small enough to fit on crowded benchtops. These products ship with a USB cable, and a 5-V at 2-A AC power adapter.
All products in the USB-3100 line are also compatible with both USB 1.1 and USB 2.0 ports, and are supported under Microsoft Windows 2000 and Windows XP operating systems.
Sink, Source 40-mA
Each of the module's voltage outputs is capable of sinking and sourcing up to 40-mA of load current. A bi-directional synchronization pin also lets you update DAC (digital-to-analog) outputs simultaneously on multiple devices.
The firm's USB-3110, USB-3112, and USB-3114 modules integrate high-drive voltage outputs, eliminating the need for external high-drive amplifiers. The USB-3110 is priced at under $400. The USB-3112 is priced under $450. The USB-3114 is priced at less than $600.
The USB-3110 provides four channels of analog voltage output, eight digital I/O connections, and one 32-bit event counter. The USB-3112 has eight analog voltage outputs, and the USB-3114 has sixteen. All other features are the same.
Lots Of Software
Measurement Computing ships these modules with lots of software. For starters, you get InstaCal,, an all-in-one installation, calibration, and test application. InstaCal lets you set up and test USB-3100 Series devices with a few mouse clicks.
You also get UL (Universal Library) and UL for LabVIEW. These are powerful language interfaces that let you to write programs in popular programming languages using easy-to-understand high-level command syntaxes.
Click here to review the modules's specs (in Adobe Acrobat .PDF format).
Click here to review the modules's user's manual (in Adobe Acrobat .PDF format).
And, click here to review the modules's datasheet (in Adobe Acrobat .PDF format).
For more details, contact Measurement Computing Corp., 16 Commerce Boulevard, Middleboro, Mass. 02346. Phone: 508-946-5100. Fax: 508-946-9500.
Measurement Computing, 508-946-5100, www.mccdaq.com