Analog I/O Wildcard User Guide

Introduction

The Analog I/O Wildcard provides eight 12-bit digital to analog (DAC) outputs and eight 16-bit analog to digital (A/D) inputs. This tiny 2" by 2.5" module is a member of the Wildcard™ series that connects directly to Mosaic embedded controllers. This document describes the capabilities of the Analog I/O Wildcard, tells how to configure the hardware, and presents an overview of the driver software. A glossary of the software functions and complete hardware schematics are also included.

Analog I/O Wildcard Hardware

The Analog I/O Wildcard comprises a Wildcard bus header, field header, digital logic circuitry, an octal 12-bit digital to analog converter (DAC), an octal 16-bit analog to digital converter (A/D), and a 4.096 volt reference. The 4.096 reference voltage varies less than 100 microvolts per degree Celsius change in temperature. Jumpers enable module address selection and reference voltage selection among 5V, 4.096V, the DAC reference voltages (1.024 or 2.048 V), or an external reference voltage. The Wildcard bus header interfaces to the host processor (Mosaic embedded controller), and the field header brings out the analog I/O signals for the reference, DAC, and A/D. Specifications are summarized in Table 1-1.

Table 1-1 Analog I/O Wildcard Specifications

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