Texas Instruments ADS1271EVM User Manual page 2

EVM Overview
4 Digital Interface Pinout (J2)
5 Power Supply Pinout
6 Reference Selection Options - S3 and S5
7 Buffer Amplfier Options - S1 and S2
8 ADC Analog Input Options - S4 and S6
9 ADS1271EVM Bill of Materials
1 EVM Overview
1.1 Features
• Full-featured evaluation board for the ADS1271 24-bit Analog-to-Digital Converter
• Two ADS1271 converters on board illustrate use of daisy-chain mode
• On-board reference and oscillator circuits
• Modular design for use with a variety of DSP and microcontroller interface boards.
• ADS1271EVM-PDK is a complete evaluation kit, which includes a USB-based motherboard and
evaluation software for use with a personal computer running Microsoft Windows™ operating systems.
1.2 Introduction
The ADS1271EVM is built in Texas Instruments' modular EVM form factor, which allows direct evaluation
of the ADS1271 performance and operating characteristics, and eases software development and system
prototyping. This EVM is compatible with the 5-6K Interface Board (SLAU104) from Texas Instruments
and additional third-party boards such as the HPA449 demonstration board from SoftBaugh, Inc.
(www.softbaugh.com) and the Speedy33™ from Hyperception, Inc. (www.hyperception.com).
The ADS1271EVM-PDK is a complete evaluation/demonstration kit, which includes a USB-enabled
DSP-based motherboard (the MMB0) and evaluation software for use with a PC.
2 Analog Interface
The ADS1271EVM features several analog input options. Signals can be routed directly to the converters
or can pass through the on-board buffer amplifiers (U5, U6). Signals can be applied to the board through
the standard modular EVM analog connector (J1) or brought in through the auxiliary input connectors (J4,
J5). A set of switches selects which analog connector source is used and whether the buffer amplifiers are
in the signal path. These switches enable several configurations for evaluation. Switch operation and
analog path configuration are described in
For maximum flexibility, the ADS1271EVM is designed for easy interfacing to multiple analog sources.
Samtec part numbers SSW-110-22-F-D-VS-K and TSM-110-01-T-DV-P provide a convenient 10-pin,
dual-row, header/socket combination at J1. This header/socket provides access to the analog input pins of
the ADS1271. Consult Samtec at
connector options.
configurations.
Speedy33 is a trademark of Hyperception, Inc..
Windows is a trademark of Microsoft Corp..
WinZip is a trademark of WinZip Computing, Inc..
2 ADS1271EVM & ADS1271EVM-PDK
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Section
www.samtec.com
Table 1 through Table 3
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5.1.
or call 1-800-SAMTEC-9 for a variety of mating
summarize the standard and auxiliary analog pinout
www.ti.com
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SBAU107 – November 2004