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Chapter 1
Introducing the USB-1608FS
The USB-1608FS is an analog input and digital I/O data acquisition device providing the following features:
Eight 16-bit single-ended (SE) analog input channels
Each input channel has a dedicated A/D converter for simultaneous sampling.
Software-selectable analog input ranges of ±10 V, ±5 V, ±2 V, and ±1 V
Eight individually configurable digital I/O channels
One 32-bit event counter
One external digital trigger input
Bidirectional external clock for synchronous operations with a second device.
Screw terminals for field wiring connections
The device is powered by the +5V USB supply from the computer, and requires no external power.
The USB-1608FS is a full-speed device that is compatible with both USB 1.1 and USB 2.0 ports. The speed of
the device may be limited when using a USB 1.1 port due to the difference in transfer rates on the USB 1.1
versions of the protocol (low-speed and full-speed).
Functional block diagram
USB-1608FS functions are illustrated in the block diagram shown here.
Figure 1. Functional block diagram
