Texas Instruments ADS112C04EVM

Overview

ADS112C04EVM from Texas Instruments is an evaluation module kit designed to support hardware and software validation of the ADS122C04 24-bit delta-sigma analog-to-digital converter (ADC). It integrates the TM4C1294NCPDT microcontroller for I²C communication with the ADC and USB interface to a PC, includes onboard 2.5-V reference, configurable analog input terminal blocks (J6/J7), and supports RTD, thermocouple, bridge, and voltage/current sensor measurements.

For engineers reviewing the ADS112C04EVM datasheet, ADS112C04EVM pinout, ADS112C04EVM application, or ADS112C04EVM equivalent, this page delivers verified hardware configuration details, jumper-switch mapping, USB-powered operation, register-level GUI control, and sensor-specific signal conditioning support - all confirmed from TI's official SBAU297 user guide.

Technical Context

The ADS112C04EVM implements a complete evaluation platform centered on the ADS122C04 ADC, using the TM4C1294NCPDT as host controller to manage I²C transactions, real-time register read/write, conversion result polling, CRC integrity checking, and data streaming over USB. Its analog front-end supports unipolar AVDD (3.3 V or 5 V), 3.3-V DVDD, and selectable reference sources (onboard 2.5 V or external via J7).

Hardware configurability includes jumper-controlled excitation sourcing (IDAC or AVDD), RTD pedestal biasing (JP14), COM grounding (JP18), AIN pullup/pulldown networks (JP12/JP13), and dual supply routing (JP3/JP4). The board provides dedicated test points (TP1–TP23) for probing AVDD, DVDD, AGND, REF+, REF−, ADC_SCL, and ADC_SDA signals without soldering.

Key Specifications

Availability

ADS112C04EVM is available at Aetrix Electronics and suitable for precision sensor evaluation, industrial ADC validation, and embedded system prototyping requiring stable component supply, traceable sourcing, and long-term toolchain continuity.

Supply support for ADS112C04EVM 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-performance silicon solutions for industrial, automotive, and communications markets.

The ADS112C04EVM belongs to TI's precision delta-sigma ADC evaluation platform family, engineered specifically to accelerate development for high-accuracy sensor measurement systems including temperature, strain, and current sensing.

FAQ

What is the primary function of the ADS112C04EVM?

The ADS112C04EVM is an evaluation module kit built to validate the performance and functionality of the ADS122C04 24-bit delta-sigma ADC. It provides full hardware integration-including TM4C1294NCPDT host MCU, USB interface, configurable analog input terminals (J6/J7), onboard 2.5-V reference, and GUI-based software control-enabling rapid testing of RTD, thermocouple, bridge, and voltage/current sensor interfaces. ADS112C04EVM supports register-level configuration and real-time data acquisition without requiring external hardware.

Does the ADS112C04EVM require an external power supply?

No, the ADS112C04EVM is powered exclusively through its USB Micro-B connector. It derives 5 V (AVDD_5), 3.3 V (DVDD_3.3V), 1.8 V (1.8V), and 2.5 V (TP23) internally via onboard regulators (U11, U15, U13, U24). No external power supply is needed or supported for standard operation. All jumpers (JP2–JP4, JP11, JP15, JP16) are configured by default to route USB-derived supplies to the ADS122C04 and Tiva MCU.

How does the ADS112C04EVM support RTD measurements?

The ADS112C04EVM supports 2-, 3-, and 4-wire RTD configurations via jumper-selectable excitation and biasing: JP6 and JP9 route IDAC current or AVDD voltage to AIN0; JP14 configures AIN3 for shunt resistor or RTD pedestal bias; JP14(2-3) connects R79 for 3-wire RTD pedestal; JP18(2-3) grounds COM to AGND. Diagrams in Figures 16–18 of TI's SBAU297 guide confirm these validated signal paths. ADS112C04EVM's hardware design directly enables Kelvin-connected resistance measurement with matched current sourcing and reference routing.

Can the ADS112C04EVM be used with an external microcontroller instead of the onboard TM4C1294NCPDT?

Yes - the ADS112C04EVM supports external processor interfacing via the J3 digital header. Pins include ADC_SCL, ADC_SDA, ADC_DRDY, ADC_RESET, and GPIO lines mapped to the ADS122C04. JP1 must be installed to hold the TM4C1294NCPDT in reset and disable level shifters, enabling clean I²C access. The J3 pinout (Table 6) and schematic (Figure 32) confirm direct signal routing without shared bus contention. ADS112C04EVM's hardware design explicitly accommodates this mode per TI's documented "Operation with external digital signals" use case.

What software is required to operate the ADS112C04EVM?

Two software components are required: (1) Delta-Sigma ADC Evaluation Software (core GUI engine), and (2) ADS122C04 Device Package (firmware + register definitions). Both are freely downloadable from TI's ADS112C04EVM product page. The GUI runs on Windows 7 or later, communicates over USB, displays real-time register maps (CONFIG0–CONFIG3), supports script-driven acquisitions (e.g., 3-wire RTD), and exports data in HEX/DEC formats. ADS112C04EVM operation is fully functional only when both software layers are installed and synchronized.