Texas Instruments ADS122U04EVM

Overview

ADS122U04EVM from Texas Instruments is an evaluation module kit designed to support hardware and software evaluation of the ADS122U04 - a 24-bit, 2-kSPS, 4-channel delta-sigma analog-to-digital converter (ADC) for precision sensor measurement applications. The kit integrates the TM4C1294NCPDT microcontroller for UART-based ADC communication and USB PC interface, includes onboard 2.5-V reference, configurable analog input terminal blocks (J6/J7), and supports RTD, thermocouple, bridge, and voltage/current sensing.

For engineers reviewing the ADS122U04EVM datasheet, ADS122U04EVM pinout, ADS122U04EVM application, or ADS122U04EVM equivalent, this page provides verified hardware configuration details, jumper/switch mapping, USB-powered operation, supported sensor interfaces (3-/4-wire RTD, thermocouple), and GUI-driven register control and data analysis capabilities.

Technical Context

The ADS122U04EVM implements a dedicated evaluation platform centered on the ADS122U04 ADC, using the TM4C1294NCPDT microcontroller as a UART bridge between the ADC and host PC via USB. It supports both onboard 2.5-V reference (U24) and external reference input through J7, with configurable excitation sources (IDAC or AVDD) for RTD biasing via JP6 and JP9.

Hardware flexibility is provided through 18 configurable jumpers (JP1–JP18) and 3 switches (S2/S4/S5), enabling selection of analog/digital supply sources (USB or external), COM grounding (AGND or VREF), AIN pull-up/pull-down biasing, and sensor input routing - all validated for direct connection to 2-/3-/4-wire RTDs, thermocouples, bridge sensors, and voltage/current signals.

Key Specifications

Availability

ADS122U04EVM is available at Aetrix Electronics and suitable for precision sensor evaluation, industrial temperature monitoring, RTD-based process control, and embedded ADC validation requiring stable component supply and full documentation traceability.

Supply support for ADS122U04EVM 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and high-reliability silicon solutions for industrial, automotive, and communications markets.

The ADS122U04EVM belongs to TI's precision delta-sigma ADC evaluation platform family, engineered specifically to accelerate development for high-accuracy sensor signal chains in temperature, pressure, and strain measurement systems.

FAQ

What is the primary function of the ADS122U04EVM?

The ADS122U04EVM is an evaluation module kit that enables hardware and software assessment of the ADS122U04 24-bit, 2-kSPS, 4-channel delta-sigma ADC. It provides a complete test environment including the ADS122U04 device, TM4C1294NCPDT controller, USB interface, configurable analog inputs, onboard 2.5-V reference, and PC-based GUI software for register control and real-time data analysis - all integrated into a single PCB platform.

Does the ADS122U04EVM require external power or is it USB-powered?

The ADS122U04EVM is fully USB-powered by default, drawing 5 V from the host PC via the included micro-USB cable. Jumpers JP2, JP3, and JP4 allow optional use of external analog/digital supplies, but standard operation requires no external power source. Green LEDs D1 and D4 illuminate when USB power is correctly applied and the board is operational.

Which sensors can be directly evaluated using the ADS122U04EVM?

The ADS122U04EVM supports direct evaluation of 2-/3-/4-wire RTDs, thermocouples (J/K types), Wheatstone bridge sensors, and voltage/current inputs. Its J6 terminal block and configurable jumpers (JP6, JP9, JP14) enable excitation current sourcing, pedestal biasing, and COM grounding - validated in TI's SBAU288 User's Guide for RTD and thermocouple configurations.

How does the ADS122U04EVM communicate with a PC?

The ADS122U04EVM communicates with a PC via USB using the onboard TM4C1294NCPDT microcontroller, which acts as a UART-to-USB bridge. The ADS122U04 ADC connects to the TM4C1294NCPDT over UART (pins ADC_TX/ADC_RX), while the microcontroller enumerates as a virtual COM port. The Delta-Sigma ADC Evaluation Software GUI uses this interface for register access, configuration, and streaming conversion data.

Is the ADS122U04EVM compatible with Windows operating systems only?

The ADS122U04EVM's official software - Delta-Sigma ADC Evaluation Software - is validated for Microsoft Windows 7 or higher, as specified in the SBAU288 User's Guide. While the underlying USB CDC/UART interface may function on Linux/macOS with custom drivers, TI does not provide native GUI support or installation packages for non-Windows platforms, and full functionality (including Scripts tab, predefined RTD scripts, and Data Analysis features) is confirmed only on Windows.