Evm Overview - Texas Instruments ADS8638EVM-PDK User Manual

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EVM Overview

1.1 Features
ADS8638EVM:
•
Full-featured evaluation board for the
• Contains all support circuitry needed for the ADS8638
• Optional onboard external REF5025 reference source
•
Compatible with the TI Modular EVM System
ADS8638EVM-PDK:
• Easy-to-use evaluation software for Microsoft
• Data collection to text files
• Built-in analysis tools including scope, FFT, and histogram displays
• Complete control of board settings
• Easily expandable with new analysis plug-in tools from Texas Instruments
For use with a computer, the ADS8638EVM-PDK is also available. This kit combines the ADS8638 board
with the DSP-based MMB0 motherboard, and includes
The MMB0 motherboard allows the ADS8638EVM to be connected to the computer via an available USB
port. This manual shows how to use the MMB0 as part of the ADS8638EVMPDK, but does not provide
technical details about the MMB0 itself.
ADCPro is a program for collecting, recording, and analyzing data from ADC evaluation boards. It is based
on a number of plug-in programs, so it can be expanded easily with new test and data collection plug-ins.
The ADS8638EVM-PDK is controlled by a plug-in running in ADCPro. For more information about
ADCPro, see the ADCPro™ Analog-to-Digital Converter Evalutation Software User's Guide
number SBAU128), available for download from the TI web site.
This manual covers the operation of both the ADS8638EVM and the ADS8638EVM-PDK. Throughout this
document, the abbreviation EVM and the term evaluation module are synonymous with the
ADS8638EVM. For clarity of reading, the rest of this manual will refer only to the ADS8638EVM or
ADS8638EVM-PDK, but operation of the EVM and kit for the ADS8614, ADS8618, and ADS8634 is
identical, unless otherwise noted.
1.2 Introduction
The ADS8638 is a 12-bit, eight-channel, 1-MHz SAR ADC with a serial peripheral interface ( SPI™). The
ADC uses a capacitor-based switching method to create an adjustable input voltage range option.
Additionally, the device features two preset alarms with hysteresis per channel. During normal operation,
the ADS8638 dissipates a mere 22.5 mW at 5-V AVDD and ±15-V high voltage supplies.
The ADS8638EVM is an evaluation module built to the TI Modular EVM System specification. It can be
connected to any modular EVM system interface card.
The ADS8638EVM is available as a stand-alone printed circuit board (PCB) or as part of the
ADS8638EVM-PDK, which includes an MMB0 motherboard and software. As a stand-alone PCB, the
ADS8638EVM is useful for evaluating designs and firmware.
Note that the ADS8638EVM has no microprocessor and cannot run software. To connect it to a computer,
some type of interface is required.
SBAU192 – July 2011
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ADS8638 SAR ADC
Windows
®
ADCPro software
Copyright © 2011, Texas Instruments Incorporated
XP operating system
®
for evaluation.
ADS8638EVM-PDK
EVM Overview
(literature
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