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USB-2020

September 2019. Rev 6

USB-2020-data.indd

© Measurement Computing Corporation

External Clock Input/Output

Terminal name: CLK IO (BNC connector)

Terminal type: ADC clock input/output, software-selectable for input or output

(default is input)

Terminal description: When configured for input, receives sampling clock from

external source

When configured for output, outputs the internal sampling clock

Clock rate: 1 kHz to 20 MHz max

Stability: ±50 ppm

Input impedance: 1 MΩ

Input threshold

High: 2.0 V min

Low: 0.8 V max

Maximum rate: 20 MHz

Input range: 0 V to 5.5 V

Clock pulse width: 25 ns min

Input type: 49.9 Ω series resistor

Input high voltage: 2.0 V min

Input low voltage: 0.8 V max

Output high voltage: 2.4 V min

Output low voltage: 0.4 V max

Output current: 24 mA max

Memory

Data FIFO: 64 MS using BURSTIO, 4 kS not using BURSTIO

Non-volatile memory: 32 KB (30 KB firmware storage, 2 KB calibration/user data)

Power

Supply voltage: 9 VDC to 18 VDC (MCC plug-in power supply CB-PWR-9

recommended

Supply current: 0.75 A max (this is the total quiescent current requirement for

the device that includes up to 10 mA for the Status LED. This value does not

include potential loading of the DIO bits or the +VO pin)

Power jack configuration: Two conductor, barrel

Power jack barrel diameter: 6.3 mm

Power jack pin diameter: 2.0 mm

Power jack polarity: Center positive

+VO voltage range: 4.50 V to 5.25 V

+

VO current sourcing: 10 mA max.

Ordering

Environmental

Operating temperature range: 0 °C to 50 °C max

Storage temperature range: –40 °C to 85 °C max

Humidity: 0% to 90% non-condensing max

Mechanical

Dimensions (L × W × H): 142.24 × 180.34 × 38.09 mm (5.6 × 7.1 × 1.5 in.)

Weight: 680 g (1.5 lb)

USB

USB device type: USB 2.0 (high-speed)

Device compatibility: USB 2.0

USB cable type: A-B cable, UL type AWM 2527 or equivalent

(min 24 AWG VBUS/GND, min 28 AWG D+/D–)

USB cable length: 3 m (9.84 ft) max

Signal I/O Connectors

USB: B type

Auxiliary connector (J9): 40-pin header connector

Compatible cables for the 40-pin auxiliary connector: C40FF-x and C40-37F-x

Compatible accessory products with the C40FF-x cable: CIO-MINI40

Compatible accessory products with the C40-37F-x cable: CIO-MINI37 and

SCB-37

BNC Connectors

CH0:Analog input channel 0

CH1:Analog input channel 1

TRIG IN: BNC connection for external digital trigger (also available on the auxiliary

connector J9)

CLK IO: BNC connection for the ADC clock I/O, software-selectable for input

or output

Order Information

Hardware

Part No.

Description

USB-2020

Ultra high-speed, simultaneous sampling USB DAQ

board with 2 SE analog inputs, 20 MS/s throughput

to internal memory, analog/digital triggers and

gates, clock I/O, and 8 digital I/O lines. Includes

power supply (MCC p/n CB-PWR-9), USB cable, and

standoffs.

Accessories & Cables

Part No.

Description

C40FF-x

40-conductor ribbon cable, female to female (x = 1, 2,

3, 4, 5, 10, 15, 20, 25, and 50 foot lengths)

CIO-MINI40

Universal 40-pin screw-terminal board, connects via a

C40FF-x cable

C40-37F-x

40-pin ribbon cable, female IDC to 37-pin female

D shell (x = 1, 2, 3, 4, 5, 10, 15, 20, 25, and 50 foot

lengths)

CIO-MINI37

Universal 37-pin screw-terminal board, connects via a

C40-37F-x cable

SCB-37

Shielded 37-pin signal connection box, connects via a

C40-37F-x cable

Software also Available from MCC

Part No.

TracerDAQ Pro

DASYLab

Description

Out-of-the-box virtual instrument suite with strip

chart, oscilloscope, function generator, and rate

generator – professional version

Icon-based data acquisition, graphics, control, and

analysis software