Description

The ADU73 Voltage Input to USB Interface features two, 0-5VDC inputs that can be used for ratiometric or absolute measurements. Ideal for use with resistive sensing devices including linear potentiometers, string pots, thermistors etc. Features a 5.000V reference output (20mA) for biasing of external sensors to facilitate ratiometric measurements. Exceptional resolution, and low noise 24-Bit sigma-delta A/D with sample rates up to 1000s/s for a single channel or 500s/s for two channels. This low-cost Voltage Input to USB Interface is easy to use with VB, VB.NET, Visual C++, C , MATLAB, LABView etc. via standard HID drivers included with Windows. A mini-driver (DLL)* is also provided, allowing control using standard ASCII commands using familiar readfile and writefile commands. The ADU73 includes a 10' USB cable and is available in a flange mount enclosure or a DIN rail mount option.

Click here to view sample connection diagrams

Download the ADU73 Quickstart Guide

Download the ADU73 User Manual

ADU72 3D Model Icon Download ADU73 3D STEP files for FLANGE or DIN mounting types.

Key Features

Dual 0-5VDC analog inputs with 24-Bit resolution.
Ratiometric configuration ensure exceptionally low noise measurements.
Ideal for resistive sensors including string pots, linear pots, thermistors, or any resistance based measurement.
Polling or Streaming operation modes simplify application software.
+5.00V reference output can be used to bias resistive sensors or power external active sensors.
Reference output short circuit protected.
Sample rate programmable from 2.5 s/s to 1000 s/s.
5.00V @ 20mA output for sensor biasing facilitates ratiometric measurements.
2500V Isolation from USB connection to analog inputs.
Bus Powered
High retention USB Connector
CE Marked
Bi-colour LED status indicator.
High quality cage-clamp type terminal blocks.
Uses standard HID drivers included with Windows 32-bit or 64-bit
Mini-driver (DLL) provided. See Programming Page for details
Meets IEC61000-4-2 ESD protection for USB port.
USB data streaming simplifies application software.
Available in flange (standard) or DIN rail mount.

Typical Applications

String Pot Measurement
Thermister Measurement
Precision Potentiometer Sensor Interface
Precision DC Voltage Output Sensor Interface (EX: Pressure)
SCADA Systems
OEM Instruments Embedded Control

Technical Specification

ADU73 Specifications
Supply Voltage	NONE (Bus Powered)
USB Supply Current (internal 24V supply)	50mA Typical 100mA Max
Isolation	2500V
Operating Temperature	-25C Min to 60C Max
Operating Environment Humidity	0 to 95% Non-Condensing

	Ratiometric Measurements	Absolute Measurements
Resolution	24- Bits (00000000-16777215)	24- Bits (00000000-16777215)
Range	0-5.000VDC ( +5.3 MAX, -0.3 MIN)	0-5.000VDC ( +5.3 MAX, -0.3 MIN)
Total Absolute Unadjusted Error	+/- 0.005% FSR MAX	+/- 0.04% FSR MAX
Temperature Stability	+/- 4 ppm FSR/Degree C	+/- 4 ppm FSR/Degree C
Reference Voltage	5.000 VDC +/- 2mV	5.000 VDC +/- 2mV
Programmable Sample Rate	2.5, 5, 20, 100, 200, 500, 1000 s/s	2.5, 5, 20, 100, 200, 500, 1000 s/s
Data Format	Decimal (ASCII)	Decimal (ASCII)

Special Functions
5.000V Reference Output	5.000V @ 20mA MAX.
Mounting Options	Flange Mount (STANDARD), DIN Rail