Texas Instruments ADS127L11EVM-PDK

Overview

ADS127L11EVM-PDK from Texas Instruments is an evaluation module designed to accelerate development and performance validation of the ADS127L11 - a 24-bit, high-speed, wide-bandwidth delta-sigma analog-to-digital converter. It integrates the ADS127L11 IC, precision host interface (PHI) controller board, USB 2.0 connectivity, onboard ultra-low-noise LDOs (TPS7A4700 for +5 V AVDD, TPS7A3001 for –2.5 V AVSS), REF6225 voltage reference, THS4551 input driver amplifier, and configurable clock tree with 25-MHz onboard oscillator (Y1) and SMA external clock input.

For engineers reviewing the ADS127L11EVM-PDK datasheet, ADS127L11EVM-PDK pinout, ADS127L11EVM-PDK application, or ADS127L11EVM-PDK equivalent, this module supports rapid ADC characterization in high-fidelity data acquisition systems - including spectral analysis, histogram testing, and time-domain signal integrity verification - with full GUI-driven control over sampling rate, digital filters, and register configuration via SPI.

Technical Context

The ADS127L11EVM-PDK implements a dual-board architecture: the main EVM board hosts the ADS127L11PW (20-pin TSSOP), its analog front-end (differential SMA inputs J3/J6, THS4551 amplifier, REF6225 reference), power regulation (TPS7A4700/TPS7A3001), and clock routing (JP6/JP7-selectable 25-MHz Y1 oscillator or external CMOS clock). The PHI controller provides USB-to-SPI bridge functionality, FPGA-based timing control, and 5.5-V power delivery to the EVM.

Digital communication uses SPI Mode 1 (CPOL = 0, CPHA = 1) at up to 40 MHz, with 10-Ω series resistors on SCLK/SDI/SDO lines for edge-rate control. An onboard I²C EEPROM (BR24G32FVT-3AGE2) stores platform identification and initialization data. The GUI software enables real-time capture, FFT, histogram, and export to text - all without requiring external power supplies under default USB-only operation.

Key Specifications

Availability

ADS127L11EVM-PDK is available at Aetrix Electronics and suitable for high-precision data acquisition, industrial test equipment, and audio instrumentation requiring stable component supply, traceable sourcing, and long-term evaluation platform continuity.

Supply support for ADS127L11EVM-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, embedded processing, and high-performance data conversion technologies, with decades of leadership in precision ADC design.

The ADS127L11EVM-PDK belongs to TI's Precision Data Acquisition Evaluation Platform family, engineered to reduce time-to-validation for high-resolution delta-sigma ADCs in demanding measurement applications such as vibration analysis, power quality monitoring, and scientific instrumentation.

FAQ

What is the primary function of the ADS127L11EVM-PDK?

The ADS127L11EVM-PDK is a complete evaluation system for the ADS127L11 24-bit delta-sigma ADC. It includes hardware (EVM board + PHI controller), firmware, and Windows-based GUI software enabling full characterization - including dynamic performance testing, spectral analysis, and register-level configuration - without requiring custom PCB design or external power supplies under default operation.

Does the ADS127L11EVM-PDK require an external power supply?

No - the ADS127L11EVM-PDK operates entirely from USB power delivered through the PHI controller board. External power connections (J7, J10–J13) are optional and only needed for specialized configurations, such as negative AVSS (–2.5 V) using the TPS7A3001 LDO or custom amplifier/reference supplies. Default operation uses USB-supplied 5.5 V regulated to +5 V (AVDD) and GND (AVSS).

Which clock sources does the ADS127L11EVM-PDK support?

The ADS127L11EVM-PDK supports three clock options: (1) 25-MHz onboard SG-210STF oscillator (Y1), selected by default via JP6 position 1–2; (2) external CMOS clock fed through SMA connector J14; and (3) 24-MHz clock from the PHI controller, used by default in the ADS127L11EVM-PDK-GUI software. Selection is managed via jumpers JP6 and JP7.

Can the ADS127L11EVM-PDK evaluate all features of the ADS127L11 device?

No - the ADS127L11EVM-PDK-GUI software currently does not support CONFIG2_REG START_MODE bits (only start/stop mode), CONFIG4_REG SPI_CRC (CRC disabled), or STATUS readback. These features are reserved for future GUI updates. For full register access and unsupported modes, users must implement custom SPI communication outside the GUI while retaining the same hardware platform.

What software and OS versions are compatible with the ADS127L11EVM-PDK?

The ADS127L11EVM-PDK-GUI requires 64-bit Microsoft Windows 8 or Windows 10, LabVIEW™ Run-Time Engine (installed automatically if missing), and TI-signed USB drivers. Antivirus software must be temporarily disabled during installer execution to prevent file quarantine. No Linux or macOS support is provided - the GUI is Windows-exclusive and distributed as a self-contained installer package.