Texas Instruments ADS114S08EVM

Overview

ADS114S08EVM from Texas Instruments is an evaluation module kit designed to support hardware and software validation of the ADS114S08 16-bit, 4-kSPS delta-sigma analog-to-digital converter for precision sensor measurement applications. It integrates the TM4C1294NCPDT microcontroller for SPI communication with the ADC and USB interface to PC, includes onboard 2.5-V reference (U27), configurable analog input terminal blocks (J7–J9), and supports RTD, thermocouple, bridge, and thermistor sensor interfaces.

For engineers reviewing the ADS114S08EVM datasheet, ADS114S08EVM pinout, ADS114S08EVM application, or ADS114S08EVM equivalent, this page delivers verified technical context, key specifications, supply support, manufacturer background, and targeted FAQs - all grounded in TI's official SBAU272A User's Guide and device package documentation.

Technical Context

The ADS114S08EVM implements a complete evaluation platform centered on the ADS114S08 ADC, using the TM4C1294NCPDT as host controller to manage SPI register access, calibration commands (self-offset/system input), CRC-enabled data transmission, and real-time conversion result readback. It supports both onboard (2.5 V from U27) and external voltage references, and allows flexible AVDD/IOVDD/DVDD sourcing via jumper-configurable power paths.

Hardware design enables direct sensor interfacing including 2-/3-/4-wire RTD (via J7/J8 excitation current sources), thermocouple (J7/J8), bridge (J7), and thermistor (J9) configurations. The board provides dual analog input terminal blocks (J7, J8, J9), digital header (J3) for external processor control, and test points (TP1–TP21) for supply/signal probing - all documented in schematic and BOM sections of SBAU272A.

Key Specifications

Availability

ADS114S08EVM 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 toolchain integration.

Supply support for ADS114S08EVM 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 sensing applications.

The ADS114S08EVM 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 weight measurement systems.

FAQ

What is the primary function of the ADS114S08EVM?

The ADS114S08EVM is an evaluation module kit that enables hardware and software validation of the ADS114S08 16-bit delta-sigma ADC. It provides SPI-controlled register access, real-time data acquisition via USB, configurable analog inputs for RTD/thermocouple/bridge sensors, and integrated 2.5-V reference - all within a single-board platform supported by TI's Delta-Sigma ADC Evaluation Software and ADS114S08 Device Package.

Does the ADS114S08EVM support both ADS114S08 and ADS124S08 devices?

No - the ADS114S08EVM is specifically configured and validated for the ADS114S08 16-bit ADC. While the broader ADS1x4S08EVM designation covers both variants, TI documents distinct device packages: the ADS114S08 Device Package must be installed to correctly identify registers, calibration behavior, and bit-width-specific features (e.g., fewer OFC/FSC registers). Using the ADS124S08 Device Package with ADS114S08EVM will cause ID register mismatch and incorrect register mapping.

How is the ADS114S08EVM powered, and what are the default supply configurations?

The ADS114S08EVM is powered via USB 2.0 or higher connection to a PC, delivering 5 V to onboard regulators. Default jumper settings (JP2, JP3, JP5–JP7, JP9, JP11, JP13–JP14) configure AVDD from 5 V (JP9 position 2–3), IOVDD/DVDD from 3.3 V (JP6/JP7 installed), REFP0 from AVDD (JP8 position 1–2), and 2.5-V reference from U27 (JP14 position 1–2). These settings enable immediate operation without external supplies.

Which sensor types can be directly connected to the ADS114S08EVM without additional circuitry?

The ADS114S08EVM supports direct connection of 2-/3-/4-wire RTDs (via J7 excitation current sources), Type-J/K thermocouples (J7/J8), resistive bridge sensors (J7), and NTC/PTC thermistors (J9), all using onboard terminal blocks and jumper-configured biasing. Each interface uses documented pin assignments (e.g., J7 pins 1–4 for AIN1/AIN2/AIN4/AIN0) and requires no external components for baseline evaluation per TI SBAU272A Section 5.1.

What software tools are required to operate the ADS114S08EVM?

Two software components are mandatory: the Delta-Sigma ADC Evaluation Software (core GUI engine) and the ADS114S08 Device Package (device-specific register definitions and scripts). Both are installed separately from TI's EVM tool page. The GUI provides register manipulation, data collection (Time Domain/Histogram/Data Inspector), and script execution (WAKE/SLEEP/RESET), while the Device Package ensures correct interpretation of ADS114S08-specific registers like ID, INPMUX, and calibration fields.