Ads1258Evm Overview; Ads1258Evm Kit; Ads1258Evm - Texas Instruments ADS1258EVM-PDK User Manual

www.ti.com

1 ADS1258EVM Overview

The ADS1258EVM is a platform for evaluating the performance of the ADS1258, a 24-bit, 125-kSPS, 16-channel
(multiplexed), ΔΣ ADC. The evaluation kit includes the ADS1258EVM and the precision host interface (PHI)
controller board that enables the accompanying computer software to communicate with the ADC over USB
for data capture and analysis. The ADS1258EVM includes the ADS1258 ADC as well as the high-performance
peripheral analog circuits necessary to extract the best performance from the ADC. The PHI board primarily
serves three functions:
• Provides a communication interface from the EVM to the computer through a USB port
• Provides the digital input and output signals necessary to communicate with the ADS1258
• Supplies power to all active circuitry on the ADS1258EVM board

1.1 ADS1258EVM Kit

The ADS1258 evaluation kit includes the following features:
• Hardware and software required for diagnostic testing as well as accurate performance evaluation of the
ADS1258 ADC.
• USB powered: No external power supply is required.
• PHI controller that provides a convenient communication interface to the ADS1258 ADC over USB 2.0 (or
higher) for power delivery as well as digital input and output.
® ®
• Microsoft Windows
• Easy-to-use evaluation software for 64-bit Windows operating systems.
• The software suite includes graphical tools for data capture, histogram analysis, and spectral analysis. This
suite also has a provision for exporting data to a text file for post-processing.
Figure 1-1 shows system connections for the EVM.

1.2 ADS1258EVM

The ADS1258EVM includes the following features and configuration options:
• An OPA2320 precision amplifier buffer between the multiplexer output and ADC input, or bypass external
circuitry
• Low-noise, low-drift, 2.5-V
• A 16-MHz clock signal provided by the PHI controller, or use an external clock source
• Eight general-purpose input-output (GPIO) pins brought out to a dedicated header
• Ultra-low noise TPS7A4700
use an external voltage supply
• 3.3-V ADC digital voltage (DVDD) supplied by PHI controller, or use external voltage supply
• Test points for power, GND, reference, and all digital signals to and from the PHI controller
SBAU126E – MAY 2007 – REVISED JUNE 2023
Submit Document Feedback
8, and Windows 10 operating systems.
Figure 1-1. System Connection for Evaluation
REF6025 as the default reference source, or use an external reference source
low-dropout (LDO) linear regulator supplies 5-V ADC analog voltage (AVDD), or
Copyright © 2023 Texas Instruments Incorporated
ADS1258EVM Overview
ADS1258EVM-PDK Evaluation Module 3