Measurement Computing

(508) 946-5100

1

info@mccdaq.com

mccdaq.com

USB-2020

Measurement Computing

(508) 946-5100

1

info@mccdaq.com

mccdaq.com

12-bit, 20 MS/s, Simultaneous-Sampling, Ultra High-Speed USB Board

Overview

The USB-2020 is a high-speed two-channel data acquisition board that provides

simultaneous sampling at rates up to 20 MS/s per channel. Users can sample data

from both channels at an overall rate of 40 MS/s to the 64 megasample onboard

memory, or continuously stream data to a host computer at up to 8 MS/s for one

or both channels over a high-speed USB connection.

Each channel has its own A/D converter for simultaneous sampling to eliminate

channel skew and ensure phase information between channels is maintained.

Flexible triggering and gating ensures data is acquired when needed. The clock I/O

input allows acquisitions to be controlled by the onboard clock or by an external

clock source for applications that require user-supplied pacing.

The board provides signal connections through four standard BNC connectors

and a 40-pin auxiliary connector.

AI Acquisition Modes

The USB-2020 can acquire analog data

using BURSTIO or continuous scan mode.

BURSTIO

BURSTIO enables a device to acquire data

at higher rates than are supported by the

USB data transfer rate.

In BURSTIO, the USB-2020 can sample

data to onboard memory at rates up to

20 MS/s per channel.

BecauseeachchannelhasitsownA/Dcon-

verter, an overall sample rate of 40 MS/s is

achieved when sampling both channels.

The simultaneous sampling eliminates

channel skew and maintains phase coher-

ence between the two channels.

The USB-2020 offers high-speed simultaneous sampling at rates up to 20 MS/s per channel

to onboard memory.

The memory buffer can store up to

64 megasamples at the maximum rate for

transfer to the computer after the acquisi-

tion is complete.

Continuous Scan Mode

Continuous scan mode enables data to be

directly transferred to the host computer

during acquisition. The maximum rate

in continuous scan mode is 8 MS/s for

all acquired data (one channel or two

channels). The maximum rate achieved

depends on the host computer.

External Clock I/O

USB-2020 analog input scanning opera-

tions can be paced with the internal A/D

clock or with an external clock source.

The CLK IO connector can be configured

through software for input (default) for

external pacing, or for output to pace a

connected device.

Trigger Input

The USB-2020 supports software-select-

able digital and analog triggers and gates.

• Digital triggers can be configured for

rising or falling edge, or for high or

low level.

• Analog triggers can be configured

for above or below level, or for ris-

ing or falling edge with hysteresis.

• Digital gates can be configured for

high or low level.

• Analog gates can be configured for

software-selectable high or low level,

or for in or out of window.

An analog scan can have a trigger or a gate,

but not both. For example, you cannot

use an analog trigger and use the TRIG IN

BNC connector to gate at the same time.

Features

• Two 20 MS/s simultaneous-

sampling analog inputs

• 12-bit resolution

• 64 megasample onboard

memory

− 40 MS/s overall rate to

onboard memory when

acquiring from both channels

− 8 MS/s throughput to host PC

• Analog and digital triggering

and gating

• Internal or external pacing of

analog scans

• Eight digital I/O lines

• BNC and 40-pin header for

signal connections

Supported Operating Systems

• Windows®

11/10/8/7/

Vista®XP 32/64-bit

• Linux®