Texas Instruments ADS1258EVM-PDK

Overview

ADS1258EVM-PDK from Texas Instruments is a complete evaluation platform for the ADS1258 24-bit, 125-kSPS, 16-channel delta-sigma analog-to-digital converter. It integrates the ADS1258 IC, precision OPA2320 signal-conditioning buffers, REF6025 2.5-V reference, TPS7A4700 low-noise LDO, PHI USB host interface controller, and full Windows GUI software - enabling rapid performance validation in high-precision data acquisition systems.

For engineers reviewing the ADS1258EVM-PDK datasheet, ADS1258EVM-PDK pinout, ADS1258EVM-PDK application, or ADS1258EVM-PDK equivalent, this module delivers turnkey evaluation of multiplexed high-resolution ADC behavior - including time-domain capture, FFT spectral analysis, histogram noise profiling, and configurable GPIO control - with no external power supply required.

Technical Context

The ADS1258EVM-PDK implements a dual-board architecture: the ADS1258EVM hosts the target ADC and front-end analog circuitry (OPA2320 buffers, REF6025 reference, TPS7A4700 AVDD LDO), while the PHI board provides USB 2.0 connectivity, SPI interface to the ADS1258, 16-MHz clock generation, and 3.3-V/5.5-V power delivery. All digital signals (CS, SCLK, DRDY, DOUT, DIN, START, RESET, PWDN) are routed via J6 test points and conform to SPI Mode 00 (CPOL = 0, CPHA = 0).

Analog input supports 16 single-ended or 8 differential channels via terminal blocks J1/J2, each with matched RC anti-aliasing filters (168.5 kHz differential cutoff, 3.37 MHz common-mode cutoff). The configurable multiplexer loop enables pseudo-differential measurement via REFOUT-biased AINCOM, and GPIO pins (GPIO0–GPIO7) are brought out to header J7 with 100-kΩ pulldowns and 49.9-Ω series termination.

Key Specifications

Availability

ADS1258EVM-PDK is available at Aetrix Electronics and suitable for high-precision sensor interfacing, industrial process monitoring, and laboratory-grade data acquisition requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for ADS1258EVM-PDK includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-performance data conversion technologies - with over 50 years of innovation in precision signal chain solutions.

The ADS1258EVM-PDK belongs to TI's Precision Data Acquisition Evaluation Platform product line, designed specifically to accelerate development of high-resolution, low-noise, multi-channel measurement systems for test & measurement, medical instrumentation, and industrial automation.

FAQ

What is included in the ADS1258EVM-PDK kit?

The ADS1258EVM-PDK kit includes the ADS1258EVM evaluation board, the precision host interface (PHI) controller board, and a micro-USB-to-USB cable. No external power supply is needed - both boards draw power directly from the USB connection. The kit does not include the ADS1258 IC separately, as it is pre-mounted on the ADS1258EVM board.

Does the ADS1258EVM-PDK support the ADS1158 device?

Yes, the ADS1258EVM-PDK hardware can support the 16-bit ADS1158 device, but requires manual replacement: the ADS1258 must be desoldered and the ADS1158 installed in its place (U3 location per schematics). The ADS1258EVM-PDK GUI software does not natively support ADS1158 - users must adjust configuration registers manually to match ADS1158 timing and register map.

How is clocking implemented on the ADS1258EVM-PDK?

The ADS1258EVM-PDK uses a 16-MHz system clock generated by the PHI controller board, which also derives the SPI SCLK signal from the same clock domain to minimize jitter. An external clock source can be connected via SMA connector J8 after removing R17 and installing it at R7 - but this requires hardware modification and is only recommended for advanced users validating custom clocking schemes.

Can I use an external voltage reference with the ADS1258EVM-PDK?

Yes, the ADS1258EVM-PDK supports external voltage references. To enable this, move the 0-Ω resistor from R4 to R2, then connect the external reference output to EXT_VREFP on terminal block J3 and its ground to EVM GND. The REF6025 remains disconnected in this configuration, and REFOUT is shorted to EXT_VREFP to maintain bias capability for external circuitry.

What software is required to operate the ADS1258EVM-PDK?

The ADS1258EVM-PDK requires the official Texas Instruments ADS1258EVM GUI software - a Windows 64-bit application built on LabVIEW Runtime Engine. Users must install the GUI installer (downloaded from TI's ADS1258 product folder), accept the license, and allow LabVIEW Runtime Engine installation if not already present. Antivirus software must be temporarily disabled during installation to prevent file quarantine.