Chapter 1
Introducing the USB-2020
The USB-2020 is a high-speed data acquisition USB board supported under the Windows
®
operating system.
The USB-2020 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).
The USB-2020 device provides the following features:
two 20 MS/s analog inputs
o
simultaneous sampling
o
1 A/D per channel
o
12-bit resolution
o
±10 V, ±5 V, ±2 V, ±1 V voltage ranges (software-selectable)
o
17 MHz input bandwidth
64 megasample onboard memory
o
40 MS/s overall rate to onboard memory when acquiring from both channels (20 MS/s per channel)
o
8 MS/s throughput to host computer
Analog and digital triggering (level and edge )
Analog and digital gating
Eight digital I/O lines
Internal or external pacing of analog scans
Eight digital I/O lines
BNC connectors and 40-pin auxiliary connector for signal connections
Functional block diagram
USB-2020 functions are illustrated in the block diagram shown here.
Figure 1. Functional block diagram
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