USB-2020 datasheet(2/5 Pages) ETC

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USB-2020

Digital I/O

The USB-2020 provides eight digital I/O lines on the 40-pin

auxiliary connector. When a bit is configured for input, it can

detect the state of any TTL-level input. Each DIO channel is an

open-drain, and can sink up to 150 mA for direct drive applica-

tions when used as an output.

External Pull-Up Capability

Digital inputs are pulled high by default to 5 V through

47 kΩ resistors. The pull-up voltage is common to all 47 kΩ

resistors.

The pull-up/pull-down state can be changed from a header on

the board. An external pull-up resistor can also be used to pull

the DIO bit up to a voltage that exceeds the internal 5 V pull-up

voltage (15 V maximum).

Calibration

The USB-2020 is factory-calibrated using a NIST-traceable calibra-

tion process. Specifications are guaranteed for one year.

The USB-2020 also supports field calibration for users to calibrate

the device locally with the InstaCal utility.

A/D 0

20 MS/s

FPGA

A/D 1

20 MS/s

CH0

CH1

TRIG

Control

TRIG IN

Clock I/O

CLK IO

DIO

1 Gb

FIFO

A/D Data

Microprocessor

A/D Data

USB

Power

System

15 V

–15 V

5 VA

–5 VA

3.3 V

2.5 V

1.2 V

Each analog channel has

a dedicated A/D converter

Features

BNC and 40-Pin Auxiliary Connectors

The USB-2020 provides four standard BNC connectors for both

analog inputs, trigger input, and clock I/O. Use standard BNC

cables to connect the BNC female connectors.

The board also includes a 40-pin auxiliary connector for the

eight digital I/O, two 5 V power outputs, and an alternate trigger

input connection. The signals available from the 40-pin auxiliary

connector require a separately-purchased cable.

Field Wiring and Signal Termination

Use the following cables and accessories to connect to the signals

available from the 40-pin auxiliary connector:

•

C40FF-x: 40-pin ribbon cable, female to female; connects

the 40-pin auxiliary connector to a CIO-MINI40 universal

screw-terminal board.

•

C40-37F-x: 40-pin female IDC to 37-pin female D shell;

connects the 40-pin auxiliary connector to a CIO-MINI37

universal screw-terminal board or SCB-37 signal connector

box.

USB-2020 Block Diagram

USB-2020 Datasheet(PDF) 2 Page - List of Unclassifed Manufacturers

USB-2020 Datasheet(HTML) 2 Page - List of Unclassifed Manufacturers

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