Texas Instruments ADS127L01EVM

Overview

ADS127L01EVM from Texas Instruments is an evaluation module designed to support hardware and software assessment of the ADS127L01 24-bit delta-sigma analog-to-digital converter. It integrates the TM4C1294NCPDT microcontroller for SPI communication with the ADC and USB interface to a Windows PC, enabling register-level control and real-time data acquisition in precision industrial measurement systems.

For engineers reviewing the ADS127L01EVM datasheet, ADS127L01EVM pinout, ADS127L01EVM application, or ADS127L01EVM equivalent, this page provides verified hardware configuration details, supported software functionality (including RREG/WREG/SPI command execution), jumper-switch mapping, analog input routing options (SMA/terminal block), and on-board clock/reference flexibility (16/8/4 MHz CLK, internal/external REF).

Technical Context

The ADS127L01EVM implements a dual-processor architecture: the TM4C1294NCPDT handles USB-to-SPI bridging, register manipulation, and GUI-driven mode control (HR, OSR[1:0], FILTER[1:0]), while the ADS127L01 operates as a high-speed, wide-bandwidth delta-sigma ADC with configurable digital filters and oversampling ratios up to OSR = 128.

Hardware mode selection is implemented via physical switches (S3) and jumpers (JP6–JP11) that directly set ADS127L01 pins including HR, OSR[1:0], FILTER[1:0], FORMAT, and FSMODE; software control is limited to HR, OSR[1:0], and FILTER[1:0] when S3[1] is open, with FORMAT and FSMODE hardwired low by Tiva GPIOs.

Key Specifications

Availability

ADS127L01EVM is available at Aetrix Electronics and suitable for precision analog test bench setup, industrial sensor signal chain validation, and delta-sigma ADC algorithm development requiring stable component supply and traceable evaluation hardware.

Supply support for ADS127L01EVM 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 analog solutions for industrial, automotive, and communications markets.

The ADS127L01EVM belongs to TI's precision data converter evaluation platform family, engineered specifically to accelerate design-in of high-resolution delta-sigma ADCs in demanding measurement applications such as power quality monitoring and vibration analysis.

FAQ

What is the primary function of the ADS127L01EVM?

The ADS127L01EVM is an evaluation module built to validate the performance and configuration of the ADS127L01 24-bit delta-sigma ADC. It provides complete hardware and software infrastructure-including TM4C1294NCPDT-based SPI bridge, USB connectivity, configurable analog input paths, and GUI-driven register control-to enable rapid prototyping and characterization of precision analog front-ends in industrial systems.

Does the ADS127L01EVM support frame-sync interface mode?

No, the ADS127L01EVM does not support frame-sync master or slave mode. Its firmware and hardware are configured exclusively for SPI communication. The FORMAT and FSMODE pins are held low by Tiva GPIOs, and frame-sync functionality is explicitly excluded from both the EVM software and supported commands per the official user guide (SBAU261B).

Can the ADS127L01EVM operate with external power supplies instead of USB?

Yes, the ADS127L01EVM supports external power via test points TP17 (LVDD), TP20 (AVDD), TP21 (DVDD), and TP19 (REFP). JP2, JP3, JP4, and JP9 must be reconfigured per Section 6 of the user guide to disable USB-derived supplies and route external voltages. Valid ranges are LVDD: 1.7–1.9 V, AVDD: 2.7–3.6 V, DVDD: 1.7–3.6 V, and REFP: 0.5–3.0 V.

How is analog input configured on the ADS127L01EVM?

Analog input on the ADS127L01EVM can be applied differentially via SMA connectors J7 (AINN) and J9 (AINP), or through terminal block J8 pins [1] and [2]. By default, the THS4541 driver amplifier is enabled; it can be bypassed by uninstalling R74/R77/R79/R82 and installing R73/R83 (0 Ω), connecting inputs directly to the ADS127L01 pins. Single-ended operation is achieved by grounding J7/J8[1] and applying signal to J9/J8[2].

What software tools are required to use the ADS127L01EVM?

Two software components are mandatory: the Delta-Sigma ADC Evaluation Software (SBAU260) for GUI-based control and data analysis, and the ADS127L01 Device Package installer - which adds device-specific register maps, configuration menus, and SPI command support (RREG/WREG/START/RDATA) to the core application. Both run on Windows 7 or later and require USB driver installation upon first connection.