Texas Instruments ADS1158EVM-PDK

Overview

ADS1158EVM-PDK from Texas Instruments is an evaluation module designed to support the ADS1158 - a 16-bit, 125-kSPS, 16-channel (multiplexed) delta-sigma analog-to-digital converter. It includes the precision host interface (PHI) controller board, USB 2.0 connectivity, on-board REF6025 2.5-V reference, OPA2320 signal-conditioning buffer, and TPS7A4700 low-noise LDO for AVDD generation - enabling rapid performance validation in high-precision data acquisition systems.

For engineers reviewing the ADS1158EVM-PDK datasheet, ADS1158EVM-PDK pinout, ADS1158EVM-PDK application, or ADS1158EVM-PDK equivalent, this module provides full hardware/software integration for evaluating ADC resolution, channel sequencing, noise floor, and SPI-based digital interface behavior under real-world analog input conditions including differential, pseudo-differential, and single-ended configurations.

Technical Context

The ADS1158EVM-PDK implements a complete signal chain around the ADS1158 ADC, featuring configurable multiplexer output routing (MUXOUTP/MUXOUTN), programmable gain stage via OPA2320 with R24/R30/R31 resistor network, and dual-domain filtering: 168.5-kHz 3-dB differential anti-aliasing and 3.37-MHz common-mode filtering using 0.1% resistors and C0G/NPO capacitors.

Digital control is delivered through a dedicated PHI controller board that generates SCLK, CS, DRDY, START, and PWDN signals in SPI Mode 00 (CPOL=0, CPHA=0), while supplying DVDD (3.3 V) and regulated AVDD (5 V) via TPS7A4700 - all powered over USB without external supplies required.

Key Specifications

Availability

ADS1158EVM-PDK is available at Aetrix Electronics and suitable for high-precision sensor interfacing, industrial process monitoring, and portable instrumentation requiring stable component supply and full evaluation ecosystem support.

Supply support for ADS1158EVM-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 company specializing in analog and embedded processing technologies, with leadership in precision data converters and evaluation platforms.

The ADS1158EVM-PDK belongs to TI's Precision Data Converter Evaluation Module product line, engineered to accelerate development of high-resolution, multi-channel measurement systems in test & measurement, medical diagnostics, and industrial automation.

FAQ

What is the primary function of the ADS1158EVM-PDK?

The ADS1158EVM-PDK is an evaluation module built to assess the performance of the ADS1158 16-bit delta-sigma ADC. It integrates the ADC with supporting circuitry including the PHI controller, REF6025 voltage reference, OPA2320 signal conditioning, and TPS7A4700 LDO - enabling full characterization of sampling rate, noise, channel sequencing, and SPI communication without custom hardware design. The ADS1158EVM-PDK supports both differential and pseudo-differential input modes via jumper-configurable biasing.

Does the ADS1158EVM-PDK include the ADS1158 IC pre-installed?

No - the ADS1158EVM-PDK ships with the ADS1258 (24-bit version) installed. To evaluate the ADS1158, users must manually remove the ADS1258 and solder the ADS1158 in its place, as explicitly stated in Section 8.3 of the user guide. The PCB layout, firmware, and GUI are compatible with both devices, but only one can be populated at a time.

Can the ADS1158EVM-PDK operate without an external power supply?

Yes - the ADS1158EVM-PDK is fully USB-powered via the PHI controller board. It derives DVDD (3.3 V) directly from USB and generates AVDD (5 V) using the onboard TPS7A4700 LDO. No external power supply is required for basic operation, though optional external supplies can be connected via JP1 (LDO input), JP3 (AVDD), or JP4 (DVDD) if needed for specific test conditions.

What software is required to use the ADS1158EVM-PDK?

The ADS1158EVM-PDK requires the official Texas Instruments EVM GUI software, which runs on 64-bit Windows 8/10 and depends on the LabVIEW™ Run-Time Engine. The GUI provides time-domain, frequency-domain, and histogram displays, supports data export to text files, and enables full register-level control of the ADS1158 - including channel selection, data rate, PGA gain, and filter configuration - all through the SPI interface managed by the PHI controller.

How does the ADS1158EVM-PDK handle analog input configuration?

The ADS1158EVM-PDK supports 16 single-ended or 8 differential inputs via terminal blocks J1 and J2, each with dedicated 168.5-kHz differential and 3.37-MHz common-mode anti-aliasing filters. For pseudo-differential measurements, REFOUT (2.5 V) is shorted to AINCOM using jumper JP2 - establishing a mid-supply common-mode voltage. In fixed-channel mode, REFOUT can be routed to any selected AINN via J3. All analog components use 0.1% resistors and C0G/NPO capacitors to preserve measurement accuracy.