Datasheet

1 EVM Overview

2 Introduction

3 Analog Interface

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EVM Overview

ADS1672EVM Features:

• Contains all support circuitry needed for the ADS1672

• Voltage references onboard

• Clock options: onboard 20MHz ceramic oscillator or adjustable frequency

• GPIO access

• Compatible with the TI Modular EVM System

ADS1672EVM-PDK Features:

• Easy-to-use evaluation software for Microsoft

Windows

• 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

As a stand-alone unit, you can use the ADS1672EVM as a prototyping or troubleshooting tool.

For use with a computer, the ADS1672EVM-PDK is available. This kit combines the ADS1672EVM board

with the DSP-based MMB0 motherboard, and includes ADCPro™ software for evaluation.

You can connect the ADS1672EVM through the MMB0 motherboard and then to a computer via an

available USB port. This manual shows how to use the MMB0 as part of the ADS1672EVM-PDK, but does

not provide technical details about the MMB0 itself.

ADCPro is a program for collecting, recording, and analyzing data from ADC evaluation boards. ADCPro

has a number of plug-in programs, so it can be expanded easily with new test and data collection plug-ins.

You control the ADS1672EVM-PDK with a plug-in that runs in ADCPro. For more information about

ADCPro, see the ADCPro™ Analog-to-Digital Converter Evaluation Software User's Guide (literature

number SBAU128 ), available for download from the TI web site.

This manual covers the operation of both the ADS1672EVM and the ADS1672EVM-PDK. It does not

describe the MMB0 motherboard in detail. Throughout this document, the abbreviation EVM and the term

evaluation module are synonymous with the ADS1672EVM.

The ADS1672EVM is an evaluation module built to the TI Modular EVM System specification. You can

connect the ADS1672EVM to any Modular EVM System interface card.

The ADS1672EVM is available as a stand-alone printed circuit board (PCB) or as part of the

ADS1672EVM-PDK, which includes an MMB0 motherboard and software. As a stand-alone PCB, the

ADS1672EVM is useful for prototyping designs and firmware development.

Note that the ADS1672EVM cannot run software. To connect it to a computer, some type of interface is

required.

The ADS1672EVM board applies 5V of power (VCC) to the ADS1672 (U6) and THS4520 (U2). The

THS4520, a wideband, fully-differential amplifier, drives the differential inputs of the ADS1672. This device

was selected because of its slew rate (570V/ µ s), settling time (7ns to 0.1%), low noise (2nV/ √ Hz) and low

harmonic distortion (HD3: –123dBc at 100kHz).

SBAU147 – March 2009 ADS1672EVM and ADS1672EVM-PDK User's Guide 3

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