9323 Hamilton

Mentor, Ohio 44060 - USA



Functional Description

Digital-to-Analog Conversion

Digital I/O


Technical Specifications


Application Assistance & Reliability

The DADIO has two primary functions: digital-to-analog conversion and digital I/O. The DADIO features 4 independent 12-bit digital-to-analog converters. All four DACs can change output states simultaneously (doubled buffered) or independently. The DADIO also features 24 lines of programmable digital I/O.


Applications Include:

The DADIO was first introduced in 1981. It has been available and supported continuously ever since, and is used in many diverse applications including laboratory testing, entertainment digital audio and multi-sonic music synthesis, laser control, and factory automation.

arrow Product Description

Four independent 12-bit digital to analog (DAC) converters deliver 5mA across one of four output ranges. The four DACs can change their outputs individually or simultaneously. 24 lines of TTL compatible digital I/O complete this multipurpose product. Our optional LabPac for DOS or LabPac32 for Windows software provides a flexible, multipurpose interface for customized programs using any language.

arrow Our Solution Includes

arrow Key Features

arrow Applications

arrow Functional Description

Both DADIO functions are on one full length PC board. Interfacing to external devices is handled through standard, RF shielded D-shell connectors. Software communicates through sixteen 8-bit I/O locations (using the IN/OUT instructions). Programming information is in the manual.

arrowDigital-to-Analog Conversion (DAC)

Four independent 12-bit digital to analog (DAC) converters source 5mA on four voltage ranges. The four voltage ranges, independently selectable (jumper blocks) for each DAC, are: 0 - 10V, 0 - 5V, ±10V, and ±5V. The analog outputs are located on a 9-pin D-shell connector. The DACs are double buffered and can change either individually or simultaneously.

arrow Digital Input/Output (DIO)

The 24 lines of TTL compatible I/O (8255A) are addressable in two groups of eight and two groups of four (24 input, 24 output, 8 I / 160, 16 I / 80, or 12 I / 120). All outputs are latched. Simple input is unlatched while strobed input is latched. Digital I/O is programmed with four 8-bit I/O locations, one command register configures the 24 lines and three I/O locations reflect the TTL data. Each line sources 200uA or sinks 1.7mA and is located on 25-pin D-shell connector.

arrow Interrupts

Hardware interrupts allow the computer's processor to react to special events when they occur. The DADIO provides two software enabled sources for interrupts (the handshake strobes for digital I/O). External sources can also be used.

arrow Technical Specifications

Environmental Specifications
Operating Temperature 0º to 70º Celsius
Storage Temperature -25º to +85º Celsius
Relative Humidity To 95% non-condensing
Agency Approvals Class A, CE-Mark