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EVM Overview

37 ADS1256EVM PCB: Top-Side Image .................................................................................. 37

38 ADS1256EVM PCB: Layer 1............................................................................................. 37

39 ADS1256EVM PCB: Layer 2............................................................................................. 37

40 ADS1256EVM PCB: Bottom-Side Image .............................................................................. 37

List of Tables

1 J1: Analog Interface Pinout................................................................................................ 5

2 J2: Serial Interface Pins.................................................................................................... 6

3 J5: GPIO Header Pins...................................................................................................... 7

4 J5 Configuration: Power-Supply Input.................................................................................... 7

5 J4, J9, and J10 Configuration: Power Options.......................................................................... 9

6 Reference Input Select Switch........................................................................................... 10

7 System Clock Select Switch ............................................................................................. 10

8 AIN0-1 Input Select Switch (S1)......................................................................................... 11

9 AIN2-3 Input Select Switch (S2)......................................................................................... 12

10 Default Jumper Positions................................................................................................. 13

11 Default Switch Positions.................................................................................................. 14

12 ADS1256EVM Bill of Materials .......................................................................................... 36

1 EVM Overview

The ADS1256EVM is an evaluation fixture for the ADS1256 24-bit delta-sigma ADC.

1.1 Features

ADS1256EVM Features:

• Contains all support circuitry needed for the ADS1256

• Voltage reference options: off-board reference, or buffered REF5025 with high or low common-mode

voltage

• Compatible with the TI Modular EVM System

ADS1256EVM-PDK Features:

• Easy-to-use evaluation software for Microsoft

Windows

• Data collection to ASCII 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 ADS1256EVM-PDK is available. This kit combines the ADS1256EVM board

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

The MMB0 motherboard allows the ADS1256EVM to be connected to the computer via an available USB

port. This manual shows how to use the MMB0 as part of the ADS1256EVM-PDK, but does not provide

technical details on 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 ADS1256EVM-PDK is controlled by a plug-in that runs in ADCPro. For more information about

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

number SBAU128), available for download from the TI website.

This manual covers the operation of both the ADS1256EVM and the ADS1256EVM-PDK. Throughout this

document, the abbreviation EVM and the term evaluation module are synonymous with the

ADS1256EVM.

SBAU090C–November 2003–Revised July 2010 ADS1256EVM and ADS1256EVM-PDK